JP6572760B2 - Power system operation system and power system operation method - Google Patents

Description

  The present invention relates to an electric power system operation system and an electric power system operation method, and in particular, when a lightning strike occurs in a warning area and the generator is in an AQR mode and performing a phase advance operation, the voltage / reactive power The present invention relates to a power system operation system and a power system operation method in which reactive power is adjusted in advance by a control device, and reactive power can be quickly adjusted during a lightning strike.

  In the reactive power adjustment of a thermal power plant, the operation of AVR (Automatic Voltage Regulator) and AQR (Automatic Q-power Regulator) is appropriately performed according to the system voltage fluctuation due to the change in power demand of the day by telephone instruction by the operator. The mode is switched and the generator reactive power value is adjusted.

  For example, in Patent Document 1, a reactive power control device that controls the output of a generator within an operable region provided to operate the generator safely while setting the reactive power output from the generator to a predetermined value. Is disclosed. Further, Patent Document 2 detects reactive power and system voltage fluctuations in the power system, and controls reactive power and system power by controlling the switching tap at the time of the transformer and the power phase adjustment equipment applied to the power system. A voltage / reactive power control device for stabilizing the voltage has been proposed.

JP 2013-153598 A JP 2000-78752 A

  By the way, in order to maintain the stability of the thermal power plant due to a power line route breakage accident as a response to the occurrence of lightning near the power plant when the generator is operating in the AQR mode, Therefore, it is necessary to set the reactive power to 0 [MVar]. In other words, when lightning occurs and power transmission line route breakage accidents occur while the generator is operating in phase, the stability cannot be maintained and the generator will step out. This is because there is a risk of losing.

  In addition, even if a lightning strikes, the operator may forget to adjust the reactive power. In particular, thermal thunder is unpredictable because it is generated by cumulonimbus clouds generated by updrafts when the air near the surface of the earth is heated due to intense solar radiation in the summer and a cold air group enters the upper layer. Therefore, if a lightning suddenly approaches, the phase-side operation is canceled after adjusting the voltage on the system side, and it is difficult to make a quick adjustment.

  Therefore, when lightning strikes occur in a warning area and the generator is operating in the AQR mode and in phase-advance operation, the present invention adjusts the reactive power in advance by the voltage / reactive power control device. An object of the present invention is to provide a power system operation system and a power system operation method capable of performing reactive power adjustment promptly at times.

  In order to solve the above problems, the invention of claim 1 includes a communication interface unit, and in accordance with a control command from the outside via the communication interface unit, the set value indicated by the control command is set to the set value of the power system. A voltage / reactive power control device for adjusting a system bus voltage and reactive power, a generator linked to the power system, first detection means for detecting an output voltage of the generator, and an output of the generator A second detection means for detecting current, and reactive power is detected based on the output voltage and output current of the generator, and the output voltage of the generator is made constant so that the reactive power becomes constant based on comparison with the set reactive power A generator for controlling the output voltage and reactive power of the generator, respectively, and an AQR that controls the reactive power of the AQR in the AQR mode. A power system operation system, wherein the generator control device includes a communication interface unit connected to a communication interface unit of the voltage / reactive power control device via a communication network, and a lightning strike position evaluation device for assessing a lightning strike position. An LLS receiver that receives lightning strike position information from (LLS), and the control means performs lightning strikes within a warning area centered on a preset position of the generator based on the lightning strike position information. A warning area determination means for determining whether or not a lightning has occurred, and when the lightning strike occurs in the warning area, the voltage / reactive power control is performed via the communication interface unit in the AQR mode and in the phase advance operation. A control command in which the reactive power suppression value is set is transmitted to the device, and the system bus voltage at the reactive power suppression value is determined by the voltage / reactive power control device. And having a reactive power control determination means for instructing pressure adjustment,.

  In the invention of claim 1, when it is determined that a lightning strike has occurred in the warning area set in advance by the warning area determination means, the voltage / reactive power is applied in the AQR mode and in the phase advance operation. A control command in which the reactive power suppression value is set is transmitted to the control device, and the reactive power is adjusted in advance by the voltage / reactive power control device. For example, in a configuration including a load switching tap for adjusting the system bus voltage of the power system and a power phase adjusting facility for adjusting the reactive power, the voltage / reactive power control device raises / lowers the load switching tap. Alternatively, the system bus voltage and reactive power of the power system are respectively adjusted by selectively turning on / off the power phase adjusting equipment.

  According to a second aspect of the present invention, in the power system operation system according to the first aspect, the reactive power control determination means completes voltage adjustment of the system bus voltage with the reactive power suppression value from the voltage / reactive power control device. The reactive power is controlled by setting the reactive power setting value of the AQR to the reactive power suppression value when the reactive power suppression of the generator is possible in response to the notification of the fact that it has been performed.

  The invention of claim 3 includes a communication interface unit, and in response to a control command from the outside via the communication interface unit, the system bus voltage and reactive power of the power system are respectively set to the set values indicated by the control command. A voltage / reactive power control device to be adjusted, a generator linked to the power system, a communication interface unit connected to a communication interface unit of the voltage / reactive power control device via a communication network, and a lightning strike position. An LLS receiver that receives lightning position information from a lightning position evaluation device (LLS) to be rated, first detection means that detects an output voltage of the generator, and second detection means that detects an output current of the generator The reactive power is detected based on the output voltage and output current of the generator, and the output of the generator is set so that the reactive power becomes constant based on comparison with the set reactive power. A power system comprising: an AQR that controls voltage; and a control unit that sets reactive power of the AQR in the AQR mode, and a generator control device that controls the output voltage and reactive power of the generator, respectively. A determination method for determining whether or not a lightning strike has occurred in a warning area centered on a preset position of the generator, based on the lightning strike position information, based on the lightning strike position information. A control command in which a reactive power suppression value is set to the voltage / reactive power control device via the communication interface unit when lightning strikes occur in the warning area and in the AQR mode and in a phase advance operation. And a command transmission step for transmitting.

  According to a fourth aspect of the present invention, in the power system operation method according to the third aspect, the notification that the voltage adjustment of the system bus voltage at the reactive power suppression value is completed is received from the voltage / reactive power control device. A notification reception step, and a reactive power control step of controlling the reactive power by setting the reactive power setting value of the AQR to the reactive power suppression value when the reactive power suppression of the generator is possible. It is characterized by.

  According to the first and third aspects of the present invention, when lightning strikes occur in the warning area, the advance adjustment of the reactive power by the voltage / reactive power control device is performed in the AQR mode and in the phase advance operation. Therefore, it is possible to automatically and quickly adjust the reactive power during lightning strikes, which had been done by humans (operators), and to stabilize the generator even in the event of an accident such as a disconnection of a transmission line route due to lightning. It is possible to maintain the degree. In particular, during heavy load periods, it can greatly contribute to stable supply when supply and demand are tight. Further, the determination of the occurrence of lightning strikes in the warning area and the transmission procedure of the control command to the voltage / reactive power control device are all performed automatically, so that the burden on the operator can be reduced.

  According to the second and fourth aspects of the invention, the notification that the voltage adjustment of the system bus voltage with the reactive power suppression value is completed is received from the voltage / reactive power control device, and the reactive power suppression of the generator is suppressed. When it is possible, the reactive power is controlled by setting the reactive power setting value of AQR to the reactive power suppression value. For example, if it is determined that the reactive power suppression of the generator is not possible, the control command with the resetting of the reactive power suppression value is sent again, so that the reactive power can be quickly adjusted during a lightning strike. In addition, the stability of the generator can be reliably maintained even in the event of an accident such as a disconnection of a transmission line route due to lightning. Moreover, since the reception procedure of voltage adjustment completion and reactive power control by AQR are all performed automatically, the burden on the operator can be reduced.

1 is a configuration diagram of a power system operation system according to an embodiment of the present invention. It is a whole block diagram of a lightning strike position evaluation apparatus (LLS). FIG. 3A is an explanatory diagram of a warning area set for each power plant, and FIG. 3B is an explanatory diagram illustrating a status display (when a lightning strike approaches power plant A) in the output unit of the generator control device. It is. It is a flowchart explaining the electric power grid | system operation method of embodiment. It is explanatory drawing which illustrates the control pattern for the electric power phase adjustment equipment selection in an operating device determination part.

  The present invention will be described below based on the illustrated embodiments.

  FIG. 1 is a configuration diagram of a power system operation system according to an embodiment of the present invention. In the figure, the power system operation system is roughly divided into a system side and a power plant side.

  First, on the grid side, a grid-side primary bus 6, an interconnection transformer 15 having a load switching tap (hereinafter referred to as LR tap), and a secondary current transformer (hereinafter referred to as secondary CT (CT) : Referred to as Current Transformer) 16, system side secondary bus 7, secondary transformer (hereinafter referred to as Secondary PT (PT) 19) 19, and static capacitor 17, which is a power phase adjusting equipment ( Hereinafter referred to as SC), a shunt reactor 18 (hereinafter referred to as ShR), which is a power phase adjusting equipment, and a voltage / reactive power control device 40.

  Further, on the power plant side, a power generator 11, a power generator control device 20, a current transformer (hereinafter referred to as CT) 14, a transformer (hereinafter referred to as PT) 13, and a power plant side bus 8 And a main transformer 12.

  First, each component on the system side will be described in detail. The voltage / reactive power control device 40 includes a communication interface unit 51 connected to the communication interface unit 28 of the generator control device 20 on the power plant side via a communication network 71. In response to an external control command via the communication interface 51, the voltage / reactive power control device 40 sets the system bus voltage (system side secondary bus 7) of the power system to the set value indicated by the control command. Voltage V2) and reactive power (reactive power Q2 of system side secondary bus 7) are adjusted.

  In addition to the communication interface unit 51, the voltage / reactive power control device 40 includes a Q2 measuring device 41, a V2 measuring device 42, a setting device 43, subtracters 44 and 45, a reactive power integrating relay (ΣQ2) 46, and a secondary A bus voltage integrating relay (ΣV2) 47, an operating device determination unit 48, an LR control circuit 49, and an SC / ShR control circuit 50 are provided.

  The Q2 measuring instrument 41 inputs the secondary current I2 detected by the secondary CT 16 and the secondary voltage V2 detected by the secondary PT 19, and measures the reactive power Q2 of the system side secondary bus 7. Further, the V2 measuring instrument 42 receives the secondary voltage V2 detected by the secondary PT 19, and measures the voltage V2 of the system side secondary bus 7.

  The setter 43 holds the target reference reactive power Q2s and the target reference secondary voltage V2s set by the operating device determination unit 48. The subtractor 44 calculates a deviation ΔQ2 between the reactive power Q2 measured by the Q2 measuring device 41 and the target reference reactive power Q2s of the setting device 43. The subtractor 45 calculates a deviation ΔV2 between the secondary voltage V2 measured by the V2 measuring instrument 42 and the target reference secondary voltage V2s of the setting unit 43.

  In addition, the reactive power integration relay (ΣQ2) 46 performs an integration operation on the measured deviation ΔQ2 between the reactive power Q2 and the target reference reactive power Q2s, and determines a determination amount (reactive power integration operation) set in advance by the operating device determination unit 48. Comparison with the determination value Zq2) is performed and a determination result is output. That is, the integration expires when the integration amount of the deviation ΔQ2 becomes equal to or greater than the reactive power integration operation determination value Zq2.

  Further, in the secondary bus voltage integration relay (ΣV2) 47, the integration calculation is performed on the deviation ΔV2 between the measured secondary voltage V2 and the target reference secondary voltage V2s, and the determination amount (preliminarily set by the operating device determination unit 48 ( Comparison with the secondary voltage integration operation determination value Zv2) is performed and a determination result is output. That is, the integration expires when the integration amount of the deviation ΔV2 becomes equal to or greater than the secondary voltage integration operation determination value Zv2.

  The operating device determination unit 48 selects the optimum power phase adjusting equipment based on the determination results of the reactive power integration relay (ΣQ2) 46 and the secondary bus voltage integration relay (ΣV2) 47. Specifically, the power phase adjusting equipment is selected along the control pattern shown in FIG. FIG. 5 is an explanatory diagram illustrating a control pattern when performing V2-Q2 control. Here, the horizontal axis is the deviation ΔQ2 between the measured reactive power Q2 and the target reference reactive power Q2s, and the vertical axis is the deviation ΔV2 between the measured secondary voltage V2 and the target reference secondary voltage V2s.

  For example, when the deviation ΔQ2 and the deviation ΔV2 are located in the first region, the system voltage is reduced by the control to lower the LR tap position, the reactive power is reduced, and the fluctuation of the system voltage is suppressed. Further, when the deviation ΔQ2 and the deviation ΔV2 are located in the second region, the control of releasing the SC 17 from the power system or the control of putting the ShR 18 into the power system is performed, thereby suppressing the fluctuation of the system voltage. Further, when the deviation ΔQ2 and the deviation ΔV2 are located in the third region, the control opposite to the first region (LR tab position raising) is performed, and when the deviation ΔQ2 and the deviation ΔV2 are located in the fourth region, The control opposite to that in the second area (opening of SC17, loading of ShR18) is performed. In addition, the area | region described with hatching in a figure is a dead zone area | region, and control is not performed.

  Further, in the voltage / reactive power control device 40, processing performed in response to a control command from the outside is performed by the operating device determination unit 48 receiving the control command via the communication interface unit 51, and an interruption in the operating device determination unit 48. The operation device determination unit 48 resets the target reference reactive power Q2s based on the reactive power suppression value set by the control command. At this time, in the reactive power integration relay (ΣQ2) 46, the integration result ΣQ2 is reset to 0, and the integration calculation is started in the movement destination region.

  The LR control circuit 49 outputs an LR tap control command to the LR tap of the interconnection transformer 15 when the control device determination unit 48 selects LR tap position control (tap down or tap up). . Note that LR tap position information is returned to the operating device determination unit 48 after the control of the LR tap control command.

  Further, the SC / ShR control circuit 50 performs SC / ShR control on the SC 17 and the ShR 18 when the operation device determination unit 48 selects the control of the LR tap position (opening / closing the SC 17, turning on / opening the ShR 18). Outputs a command. In addition, after the control of the SC / ShR control command, the status information of SC17 and ShR18 is returned to the operating device determination unit 48.

  Next, the power plant side will be described. The generator 11 is connected to the system side (power system) via the main transformer 12. CT14 corresponds to the first detection means and detects the output voltage of the generator 11. PT13 corresponds to the second detection means and detects the output current of the generator 11. The power plant only needs to have a configuration including the generator 11, and may be either a thermal power plant or a hydroelectric power plant.

  The generator control device 20 includes an AQR setter 30, an AQR (Automatic Q-power Regulator) 31, an AVR (Automatic Voltage Regulator) 32, a control unit (control means) 21, a storage unit 25, an input unit 26, an output unit 27, A communication interface unit 28 and an LLS receiver 29A are provided.

  First, the communication interface unit 28 is connected to the communication interface unit 51 of the voltage / reactive power control device 40 via the communication network 71. The communication network 71 enables bidirectional communication between the voltage / reactive power control device 40 and the generator control device 20, for example, a power line for performing communication by PLC, a wireless communication path, It is embodied by a public telephone line network, Ethernet (registered trademark), a communication cable, or a communication network such as the Internet.

  In addition, the LLS receiver 29A receives lightning position information from the LLS master station 61 of a lightning position evaluation device (LLS: Lightning Location System) that evaluates the position of the lightning. In FIG. 2, the whole structure of a lightning strike position evaluation apparatus (LLS) is illustrated.

  That is, each LLS slave station 62 receives a lightning radio wave, and the LLS master station 61 evaluates the lightning strike position based on the arrival time difference of the lightning radio wave to each LLS slave station 62. Then, lightning strike position information is transmitted from the LLS master station 61 to the LLS receivers 29A to 29X of each power plant via the communication network 63. The communication network 63 enables one-way or two-way communication between the LLS master station 61 and each of the LLS receivers 29A to 29X. For example, a power line for performing communication by PLC, The present invention is embodied by a wireless communication path, a public telephone line network, Ethernet (registered trademark), a communication cable, or a communication network such as the Internet.

  Next, the AQR setter 30 detects reactive power based on the output voltage and output current of the generator 11 and notifies the control unit 21 of it. The reference reactive power value set by the control unit 21 is held.

  Further, the AQR 31 compares the detected reactive power with the reference reactive power value of the AQR setter 30, and if there is a deviation, controls the voltage setter (not shown) in the AVR 32 to make the reactive power constant. The output voltage of the generator 11 is controlled.

  Further, the AVR 32 compares the detected output voltage of the generator 11 with the reference voltage set by the control unit 21, and if there is a deviation, increases or decreases the field current of the generator 11, and outputs the output voltage of the generator 11. Is controlled to a constant value.

  Next, the control unit 21 includes a setting unit 22, an LLS warning area determination unit (warning area determination unit) 23, and a reactive power control determination unit (reactive power control determination unit) 24. The control unit 21 is realized by a processor such as a CPU, and each component in the control unit 21 is held in the storage unit 25 as a macro function program and executed on the CPU (control unit 21). is there.

  The setting unit 22 controls the output mode of the generator 11 such that the operation mode of the generator 11 is an AVR mode in which the output voltage of the generator 11 is controlled to a constant value by the AVR 32, or the reactive power is constant by the AQR 31. Set to either AQR mode.

  In addition, the LLS warning area determination unit 23 generates lightning strikes within a warning area centered on a preset position of the generator 11 based on lightning strike position information received from the LLS master station 61 via the LLS receiver 29A. It is determined whether or not it has occurred.

  Here, as shown in FIG. 3 (b), the lightning strike position assessment device (LLS master station 61) manages map data in units of mesh divided by a grid, and the warning area of each power plant is shown in FIG. As shown in FIG. 3 (a), the unit meshes are set by a total of nine unit meshes, which are unit meshes in eight directions around the unit mesh where the power plant is located.

  In the A power plant shown as a specific example, when a lightning strike occurs in any of 9 unit meshes of 9D, 9E, 9F, 10D, 10E, 10F, 11D, 11E, and 11F, the lightning location information is displayed together with the lightning occurrence time. The data is transmitted from the LLS master station 61 to the LLS receiver 29A. Note that lightning strike position information may be periodically transmitted (with a relatively short period) over a wide range as shown in FIG. In this case, the display as shown in FIG. 3B is made on the output unit 27 such as a display.

  In addition, the reactive power control determination unit 24 applies a reactive power to the voltage / reactive power control device 40 via the communication interface unit 28 in the AQR mode and in the phase advance operation when a lightning strike occurs in the warning area. A control command in which a suppression value is set is transmitted, and a notification that the voltage adjustment of the system bus voltage with the reactive power suppression value has been completed is received from the voltage / reactive power control device 40. The reactive power is controlled by setting the value to the reactive power suppression value.

  Next, a power system operation method according to the embodiment of the present invention will be described in detail with reference to FIG. FIG. 4 is a flowchart for explaining the power system operation method of this embodiment. FIG. 4 (a) shows the processing performed on the generator control device 20 side, and FIG. 4 (b) shows the voltage / reactive power control device 40. Each processing performed on the side is shown.

  First, in step S1, the LLS warning area determination unit 23 of the generator control device 20 uses a lightning strike position information received by the LLS receiver 29A in the warning area centered on the preset position of the generator 11. To determine whether a lightning strike has occurred. Step S1 corresponds to a determination step in the claims. If a lightning strike has occurred, the “lightning warning” state is entered, and the process proceeds to step S2. The process in step S1 is repeated at regular intervals, and is repeated until a lightning strike occurs in any unit mesh in the alert area.

  Next, in step S2, the reactive power control determination unit 24 determines whether the current generator operation is the AQR mode or the AVR mode. In the case of the AVR mode, the following processing is not necessary, and the process returns to step S1. If it is in the AQR mode, the process proceeds to step S3.

  Next, in step S3, the reactive power control determination unit 24 determines whether or not the operation of the generator 11 is a phase advance operation based on the reactive power value of the generator 11. When the reactive power value is 0 [MVar] or the operation is a slow phase operation, the following processing is not necessary, and the process returns to step S1. When the operation is a phase advance operation, the process proceeds to step S4.

  Next, in step S <b> 4, a control command in which a reactive power suppression value is set is transmitted to the voltage / reactive power control device 40 via the communication interface unit 28. Here, the reactive power suppression value is set to 0 [MVar] or a delay plus direction. Steps S2 to S4 correspond to the command transmission step in the claims.

  On the other hand, on the voltage / reactive power control device 40 side, when the control command in which the reactive power suppression value is set is received via the communication interface unit 51 in step S11, the operating device determination unit 48 determines that the operating device determination unit 48 in FIG. The interrupt processing routine is started, and the target reference reactive power Q2s is reset based on the reactive power suppression value set by the control command. At this time, in the reactive power integrating relay (ΣQ2) 46, the integration result ΣQ2 is reset to 0, and the reactive power integrating relay (ΣQ2) 46 and the secondary bus voltage integrating relay (ΣV2) in the destination area (see FIG. 5). ) 47 is started.

  Then, integral determination is performed by reactive power integrating relay (ΣQ2) 46 and secondary bus voltage integrating relay (ΣV2) 47 (step S13). Further, the operating device determination unit 48 determines the power phase adjusting equipment according to the control pattern shown in FIG. 5 based on the determination results of the reactive power integration relay (ΣQ2) 46 and the secondary bus voltage integration relay (ΣV2) 47. Select (step S14).

  Then, the operating device determination unit 48 determines that the measured deviation ΔQ2 between the reactive power Q2 and the target reference reactive power Q2s and the measured deviation ΔV2 between the secondary voltage V2 and the target reference secondary voltage V2s are located in the dead zone region of FIG. When it is reached, it is determined that the voltage adjustment of the system side bus voltage has been completed (step S15). Note that the processes in steps S13 to S15 are repeated until it is determined that the voltage adjustment of the system side bus voltage has been completed.

  Further, in step S <b> 16, the operating device determination unit 48 transmits the voltage adjustment result of the system side bus voltage to the generator control device 20 side via the communication interface unit 51.

  On the other hand, on the generator control device 20 side, the voltage adjustment result of the system side primary bus voltage is received in step S5. Step S5 corresponds to the notification receiving step in the claims. Then, the reactive power control determination unit 24 determines whether or not the voltage adjustment of the system side bus voltage is completed and whether or not the reactive power of the generator 11 can be suppressed (step S6). Here, when it is determined that the reactive power suppression of the generator 11 is not possible, the process returns to step S4 and the control command in which the reactive power suppression value is reset is transmitted again.

  In step S6, when the system-side bus voltage adjustment is completed and the reactive power suppression of the generator 11 is possible, the process proceeds to step S7, and the reactive power setting value of the AQR setter 30 is changed to the reactive power suppression value. Set and perform constant reactive power control by AQR. Steps S6 and S7 correspond to the reactive power control step in the claims.

  The control unit 21 includes a (software) timer that starts timing from the time when the current occurrence of lightning strike is determined ("lightning warning" state is entered in step S1). In step S <b> 8, the warning area determination unit 23 determines whether or not a lightning strike has occurred in the warning area during the period until the timer reaches 30 minutes. If there is no lightning strike in the alert area, the “lightning alert” is canceled, the process proceeds to step S9, and the process shifts to the reactive power control of the generator in the human system and ends. If a lightning strike has occurred in the alert area within 30 minutes, the process returns to step S2 to maintain the “lightning alert” state. Here, the decision to cancel the lightning warning is made in the “period until the timer counts up to 30 minutes”, but is not limited to “30 minutes” and can be arbitrarily selected according to the season, weather conditions, etc. It may be variably set.

  As described above, in the power system operation system and the power system operation method of this embodiment, the LLS warning area determination unit 23 determines whether or not a lightning strike has occurred in the warning area set in advance (determination). Step), when it is determined that a lightning strike has occurred in the warning area, and in the AQR mode and the phase advance operation is being performed, the reactive power control determination unit 24 uses the communication interface unit 28 to set the voltage / invalidity. A control command in which the reactive power suppression value is set is transmitted to the power control device 40 (command transmission step), and the reactive power is adjusted in advance by the voltage / reactive power control device 40.

  On the system side, an on-load switching tap for adjusting the system bus voltage of the power system (interconnection transformer 15 provided with an LR tap), power phase adjustment equipment for adjusting reactive power (static capacitor 17 and shunt reactor 18), The voltage / reactive power control device 40 selectively raises / lowers the switching tap at the time of loading, or selectively turns on / off the power phase-adjusting equipment, thereby enabling the system bus voltage and invalidity of the power system. Adjust the power respectively.

  In this way, when lightning strikes occur in the warning area, when the AQR mode and the phase advance operation are performed, the voltage / reactive power control device 40 performs the advance adjustment of the reactive power. Adjustment of reactive power during lightning strikes performed by the operator) can be performed automatically and quickly, and the stability of the generator 11 can be maintained even in the event of an accident such as a disconnection of a transmission line route due to lightning. It is. In particular, during heavy load periods, it can greatly contribute to stable supply when supply and demand are tight. In addition, since the determination of the occurrence of lightning strikes in the alert area and the transmission procedure of the control command to the voltage / reactive power control device 40 are all performed automatically, the burden on the operator can be reduced.

  In this embodiment, the reactive power control determination unit 24 notifies the voltage / reactive power control device 40 that the voltage adjustment of the system bus voltage with the reactive power suppression value is completed via the communication interface unit 28. Is received (notification reception step), and the reactive power is controlled by setting the reactive power setting value of the AQR 31 to the reactive power suppression value when the reactive power suppression of the generator is possible (reactive power control step).

  In addition, when it is determined that the reactive power suppression of the generator 11 is not possible, the control command in which the reactive power suppression value is reset is transmitted again, so that the reactive power can be quickly adjusted during a lightning strike. In addition, the stability of the generator 11 can be reliably maintained even when an accident such as a transmission line route breakage due to lightning occurs. In addition, since the reception procedure for voltage adjustment completion and the reactive power control by the AQR 31 are all performed automatically, the burden on the operator can be reduced.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention.

  For example, in the above-described embodiment, on the system side, the current transformer is configured as the secondary CT 16 installed on the secondary side, but this may be configured on the primary side. In this case, in the voltage / reactive power control device 40, the reactive power Q1 of the system side primary bus 7 is measured by the Q1 measuring instrument, the integration operation ΣQ1 is performed by the reactive power integrating relay, and the operating device determination unit 48 performs V2-Q1. Based on the control, the power phasing equipment is selected.

  Further, the generator control device 20 may be configured to include an APFR (Automatic Power Factor Regulator) that makes the power factor constant by controlling the voltage setting unit in the AVR 32 similarly to the AQR 31.

6 System side primary bus 7 System side secondary bus 8 Power station side bus 11 Generator 12 Main transformer 13 PT (transformer)
14 CT (current transformer)
15 Interconnection transformer 16 Secondary CT (Secondary current transformer)
17 SC (Static capacitor)
18 ShR (Chantoriactor)
20 generator control device 21 control unit (control means)
22 setting part 23 LLS warning area determination part (warning area determination means)
24 reactive power control determination unit (reactive power control determination means)
25 storage unit 26 input unit 27 output unit 28, 51 communication interface unit 29A to 29X LLS receiver 30 AQR setter 31 AQR
32 AVR
40 Voltage / Reactive Power Control Device 41 Q2 Measuring Device 42 V2 Measuring Device 43 Setting Device 44, 45 Subtractor 46 Reactive Power Integration Relay (ΣQ2)
47 Secondary bus voltage integration relay (ΣV2)
48 Operation Device Determination Unit 49 LR Control Circuit 50 SC / ShR Control Circuit 61 LLS Master Station 62 LLS Slave Station 63, 71 Communication Network

Claims (4)

A voltage / reactive power control that includes a communication interface unit and adjusts a system bus voltage and reactive power of a power system to a set value indicated by the control command according to a control command from the outside via the communication interface unit Equipment,
A generator linked to the power system;
A first detection means for detecting the output voltage of the generator, a second detection means for detecting an output current of the generator, and reactive power is detected and set based on the output voltage and output current of the generator. AQR for controlling the output voltage of the generator so that the reactive power is constant based on the comparison with the reactive power, and a control means for setting the reactive power of the AQR in the AQR mode, the output of the generator A generator control device for controlling voltage and reactive power respectively;
A power system operation system comprising:
The generator controller is
A communication interface unit connected to a communication interface unit of the voltage / reactive power control device via a communication network;
An LLS receiver that receives lightning position information from a lightning position evaluation device that evaluates the position of the lightning,
The control means includes
Based on the lightning strike position information, warning area determination means for determining whether a lightning strike has occurred in a warning area centered on the preset position of the generator;
When a lightning strike occurs in the warning area, a control command in which a reactive power suppression value is set to the voltage / reactive power control device via the communication interface unit in the AQR mode and in a phase advance operation. Reactive power control determination means for transmitting and instructing voltage adjustment of the system bus voltage at the reactive power suppression value by the voltage / reactive power control device;
A power system operation system characterized by comprising:   The reactive power control determination means is capable of suppressing the reactive power of the generator upon receiving notification from the voltage / reactive power control device that the voltage adjustment of the system bus voltage with the reactive power suppression value is completed. In such a case, the reactive power is controlled by setting the reactive power setting value of the AQR to a reactive power suppression value. A voltage / reactive power control that includes a communication interface unit and adjusts a system bus voltage and reactive power of a power system to a set value indicated by the control command according to a control command from the outside via the communication interface unit Equipment,
A generator linked to the power system;
A communication interface unit connected to a communication interface unit of the voltage / reactive power control device via a communication network; an LLS receiver that receives lightning position information from a lightning position evaluation device that evaluates a lightning position; and First detection means for detecting output voltage, second detection means for detecting output current of the generator, reactive power is detected based on the output voltage and output current of the generator, and the set reactive power AQR that controls the output voltage of the generator so that the reactive power becomes constant based on the comparison, and a control unit that sets the reactive power of the AQR in the AQR mode, the output voltage and reactive power of the generator A generator control device for controlling
A power system operation method for a power system operation system comprising:
Based on the lightning strike position information, a determination step for determining whether or not a lightning strike has occurred in a warning area centered on a preset position of the generator;
A control command in which a reactive power suppression value is set to the voltage / reactive power control device via the communication interface unit when lightning strikes occur in the warning area and in the AQR mode and in a phase advance operation. A command transmission step for transmitting
An electric power system operation method characterized by comprising: A notification receiving step for receiving notification from the voltage / reactive power control device that the voltage adjustment of the system bus voltage at the reactive power suppression value is completed;
When the reactive power suppression of the generator is possible, the reactive power control step of controlling the reactive power by setting the reactive power setting value of the AQR to the reactive power suppression value;
The power system operation method according to claim 3, wherein:

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