WO2010066105A1 - Hybrid direct current power supply control system for communication station - Google Patents

Abstract

A hybrid direct current power supply control system for a communication base station includes an internal-combustion generator set (11), a solar generator set (13), a wind power generator set (14) and a storage battery set (7). The solar generator set (13), the internal-combustion generator set (11) and the wind power generator set (14) are respectively connected to a power management controller (12) through communication lines (16-1, 16-2, 16-3). A discharge resistor (15) is connected to a discharge switch (K1). The solar generator set (13) and the wind power generator set (14) are respectively connected to a bus connection bar (10). The storage battery set (7) and a power consumption equipment (8) are respectively connected to the bus connection bar (10). The internal-combustion generator set (11) is connected to the bus connection bar (10). The wind power generator set (14), the internal-combustion generator set (11), the solar generator set (13) and the storage battery set (7) are connected in parallel to supply power to the power consumption equipment (8).

Description

 Hybrid DC power supply control system for communication base station

Technical field

 The present invention relates to a hybrid DC power supply control system for a communication base station, and more particularly to a power supply unit for a communication base station without a mains supply.

Background technique

 In remote areas or mountainous areas, the communication base stations of the area are generally powered by internal combustion generator sets because the 220V public power grid has not yet been fully popularized. The internal combustion generator set is generally a synchronous generator set with a speed of 1500 rpm and a voltage of 220V. The power equipment used in the communication base station supplies power to the 48V DC battery pack, and the external equal power charger is used to convert the synchronous generator set AC into DC power to the battery pack. In order to improve the continuity of the power supply of the communication base station, the standby generator set is used to supply power, that is, the two generator sets are continuously operated to supply power. At the same time, due to the use of synchronous generator sets, the frequency of the output voltage is proportional to the engine speed, and the engine speed is generally fixed at 1500 rpm.

 The above-mentioned disadvantages of using the above-mentioned internal combustion engine generator set to supply power to the communication base station have the following disadvantages: 1. All of the fuel is used to generate electricity, which has a high power generation cost. 2. The generator set is continuously operated for a long time, and the unit needs to be regularly maintained, so that the reliability of the communication base station equipment cannot be guaranteed. 3. The synchronous generator set works at a fixed speed regardless of whether it is idling or full load, and the engine fuel consumption is not optimally controlled. 4. With a charger of equal power, when converting 220V AC to 48V DC, it will lose about 10% of power. 5. When selecting the synchronous generator set power, since the generator set is supplied to the charger, the power of the selected generator set should be about 1.5 times of the power of the charger. Under the same power generation conditions, the power consumption of a generator set with a large rated power is greater than that of a generator set with a smaller rated power.

 Japanese Patent Application Publication No. JP2006-280177A, the entire disclosure of which is incorporated herein by reference in its entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire disclosure In the power supply unit, a solar battery is used as a power source for the load, and the comprehensive utilization rate of the energy is improved. However, the device does not involve the use of other energy sources, such as wind energy, and has certain limitations.

Summary of the invention

 SUMMARY OF THE INVENTION An object of the present invention is to overcome the above-mentioned deficiencies, and to provide a hybrid DC power supply control system for a communication base station which can use a plurality of types of energy sources and has low power generation cost.

According to the technical solution provided by the present invention, a communication base station is controlled by a hybrid DC power supply System, including internal combustion generator set, solar generator set and ^tt: the solar generator set is connected to the power management controller through a communication line, the discharge resistor is connected to the discharge switch, and the wind power generator is connected to the power management controller through the communication line The power management controller is connected to the internal combustion generator set through a communication line, and the solar power generator set and the wind power generator set are respectively connected with the busbar connection row, the busbar connection row is respectively connected with the battery pack and the electric equipment, and the internal combustion generator set is connected with the busbar connection row. ;

 The wind turbine is powered in parallel with the internal combustion generator set, the solar generator set and the battery pack, and the wind power generator set, the internal combustion generator set and the solar power generator set are controlled by the power management controller, and are responsible for overall energy management and Assignment, transmission of information and transmission of commands.

 The power management controller transmits information using a CAN communication protocol or an RS485 communication protocol. The internal combustion generator set includes an engine, a multi-pole permanent magnet generator, a DC digital module and an engine management controller, the engine is sequentially connected with a multi-pole permanent magnet generator and a DC digital module, and the DC digital module is respectively connected with the busbar and the engine management control. The engine management controller is coupled to the engine, and the engine management controller controls the engine, the multi-pole permanent magnet generator, and the DC digital module.

 The solar generator set includes a solar battery pack and a DC-DC converter, the solar battery pack is connected to the DC-DC converter, the DC-DC converter is connected to the discharge switch, and the solar battery pack emits electric energy, which is converted by the DC-DC converter. The amount of power supplied to the powered device through the busbar connection.

 The wind power generator includes a wind power generator and an AC-DC converter, and the wind power generator is connected to an AC-DC converter, and the wind power generator generates electric energy by tracking an operation mode of wind direction and wind speed and a target power generation amount, by AC- The DC converter converts the amount of power supplied to the powered device through the busbar connection.

 The wind power generator uses a direct drive wind power generator.

 The present invention has the following advantages over the prior art:

 1. The invention adopts three power supply modes of solar generator set, wind power generator set and internal combustion generator set to achieve the best energy saving and discharging effect.

 2. The present invention preferentially uses solar power generation and wind power generation, and starts the internal combustion generator set under the condition that the solar power generation and the wind power generation do not satisfy the power generation amount, thereby reducing the power generation operation cost.

 3. If there is surplus in solar power generation and wind power generation, battery packs are used for energy storage to achieve full utilization of energy.

4. Reduce the cost of fuel generation by reducing the frequency of use of DC digital generator sets. DRAWINGS Figure 1 is a schematic view of the structure of the present invention.

 2 is a schematic block diagram of a power management controller in the present invention.

 3 is a schematic block diagram of an engine management controller in the present invention.

detailed description

 The invention will be further described below in conjunction with the embodiments of the drawings - as shown in Figure 1, including a DC digital generator set 11 (diesel or gasoline engine 2, multi-pole permanent magnet generator 3, DC digital module (model: CSR) -3Z-5K) 9. Engine Management Controller 17 chip model is ATmega8L); Power Management Controller 12; Solar Generator Set 13 (Solar Battery Pack 1, DC-DC Converter 4); Wind Turbine 14 (Wind Generator) 5. AC-DC converter 6); battery pack 7; consumer equipment 8; busbar connection row 10; discharge resistor 15; communication lines 16-1, 16-2, 16-3 and discharge switch K1.

 The solar generator set 13 of the present invention is connected to the power management controller 12 via the communication line 16-1, the discharge resistor 15 is connected to the discharge switch K1, and the wind power generator set 14 is connected to the power management controller 12 via the communication line 16-3, and the power management The controller 12 is connected to the internal combustion generator set 11 via a communication line 16-2, and the solar generator set 13 and the wind power generator set 14 are respectively connected to the busbar connection row 10, and the busbar connection row 10 is respectively connected to the battery pack 7 and the powered device 8. The internal combustion generator set 11 is connected to the busbar connection row 10. The powered device mainly comprises a DC-powered base station remote communication module (BH-08) and a DC-powered base station communication module (CDMA2000-1X).

 The wind turbine 14 is powered in parallel with the internal combustion generator set 11, the solar generator set 13 and the battery pack 7, and the wind power generator set 14, the internal combustion generator set 11 and the solar power generating set 13 are powered by a power management controller. 12 chip control. The power management controller 12 transmits information using a CAN communication protocol or an RS485 communication protocol.

 The power management controller 12 is responsible for the management and distribution of the overall energy. By monitoring the power consumption W0 of the electrical equipment 8, monitoring the existing power W1 of the battery pack 7, monitoring the power generation amount W2 of the wind power generator 14, monitoring the power generation amount W3 of the solar power generating unit 13, and monitoring the power generation of the direct current digital power generating unit 11. Quantity W4, for energy management and distribution.

 As shown in FIG. 2, the power management controller 12 is electrically connected to the CAN 12-2, the EEPROM 12-3, the LCD display 12-4, the panel-operation keys 12-5, and the buzzer by the chip (model C164) 12-1. The device 12-6 is connected.

The internal combustion generator set 11 includes an engine 2, a multi-pole permanent magnet generator 3, a DC digital module 9 and an engine management controller 17, and the engine 2 sequentially connects the multi-pole permanent magnet generator 3 and the DC digital module 9, and the DC digital module 9 Connected to the busbar connection row 10 and the engine management controller 17, respectively. The engine management controller 17 is connected to the engine 2, and the engine management controller 17 controls the engine 2, the multi-pole permanent magnet generator 3, and the DC digital module 9. The engine 2 is a diesel or gasoline engine. The high-efficiency multi-pole permanent magnet generator 3 emits low-voltage alternating current, and the DC power is output after being controlled and rectified by the DC digital module 9. If an ordinary 220V synchronous generator is used, a charger that converts 220V AC to DC is required. The DC digital generator set 11 is smaller than the ordinary 220V synchronous generator set of the same power, light in weight and saves fuel. The DC digital generator set 11 cancels the charger, no power loss, and a smaller power digital DC generator set can be selected.

 As shown in FIG. 3, the engine management controller 17 is connected to the fuel amount sensor 17-2, the oil pressure sensor 17-3, the oil temperature sensor 17-4, the water temperature sensor 17-5, and the rotational speed sensor 17 by the chip 17-1. -6. The starter motor relay 17-7, the stop relay 17-8, the CAN communication 17-9, and the stepping motor M1 that controls the engine speed are connected to control the operation of the engine 2.

 The solar generator set 13 includes a solar battery pack 1 and a DC-DC converter 4, the solar battery pack 1 is connected to a DC-DC converter 4, the DC-DC converter 4 is connected to a discharge switch K1, and the solar battery pack 1 emits electric energy by DC. The -DC converter 4 converts the amount of power supplied to the consumer 8 through the busbar connection bank 10.

 The wind power generator set 14 includes a wind power generator 5 and an AC-DC converter 6, and the wind power generator 5 is connected to an AC-DC converter 6, which works by tracking wind direction and wind speed and a target power generation amount. The electric energy is generated, converted by the AC-DC converter 6, and supplied to the electric device 8 through the bus bar connection row 10. The wind power generator 5 employs a direct drive type wind power generator, which can also generate electricity under low wind speed conditions, and has an overall high efficiency.

 The power device 8 , that is, the load is powered by the solar generator set 13 , the wind power generator set 14 , the battery pack 7 , and the internal combustion generator set 11 . When the power of the upper stage power supply is insufficient, the next stage power supply is sequentially activated. When the amount of power generated by the solar generator set 13 and the wind turbine set 14 is greater than the amount of power used by the load, excess power is used to charge the battery pack 7. When the amount of electricity of the battery pack 7 is lower than the lower limit value, the internal combustion engine set 11 is activated to supply power to the load and charge the battery pack 7.

 The specific working process of the present invention is as follows:

1. During the daytime, the solar generator set 13 generates 3^ the power consumption device 8 uses the power amount W0, indicating that the solar energy is sufficient, and the power management controller 12 commands the solar power generating unit 13 to work in the maximum power tracking manner, so that the solar power generating unit 13 The maximum power is emitted, and the power supply device 8 supplies the W0 power through the busbar connection row 10. Set the excess power to Wxl=W3-W0, charge the excess battery Wxl to the battery pack 7, and increase the battery pack 7 power W1 value. Let wind turbines generate electricity W2=0, reducing the working time of the wind turbine 14 .

 2. For example, the amount of power generated by the solar generator set 13 is ¥3<the power consumption of the electric equipment 8 is W0, and the power generation amount of the wind turbine generator 14 is set to W5=the power generation device 8W0-the solar power generation unit 13 generates the power amount W3, and the wind power meets the power generation condition. Next, the power management controller 12 commands the wind turbine 14 to generate a power amount W5, and the wind power generator 14 emits the electric energy W5 by tracking the wind direction and the wind speed and the operation mode of the target power generation amount W5.

 3. Set the maximum power of battery pack 7 to Wmax and the minimum power to Wmin. The first and second items above operate under the condition that the battery pack 7 has a power Wl < maximum power Wmax and the BP battery pack 7 is under full power. When the battery pack 7 power Wl = Wrnax, the power management controller 12 issues a command to the DC-DC converter 4, leaving K1 active, and supplying the excess power Wxl to the resistor 15. 4. When (Wind Generator 14 Power Generation W2+ Solar Generator 13 Power Generation W3) <Power Equipment 8 Power consumption W0, that is, solar energy and wind energy cannot meet the power consumption W0 of the power equipment 8. Setting the insufficient power Wx2= Power consumption equipment 8 Power consumption W0- (Wind generator 14 power generation W2+ Solar generator set 13 power generation 3), and the insufficient power Wx2 is used to charge the battery pack 7 Wl.

 5. In the above item 4, when the battery pack 7 power W1=Wmin, that is, when the battery pack 7 can no longer be discharged, the power management controller 12 commands the DC digital generator set 11 to start working, and the DC digital generator set 11 receives the start command. After that, the generator set is automatically started, and the power generation amount W4 of the DC digital generator set 11 is sent out. When the charge amount required for the battery pack 7 is set to Wx3, the DC digital power generation unit 11 generates the power amount W4 = the power shortage Wx2+ the battery pack 7 requires the amount of charge Wx3. The DC digital generator set 11 supplies power to the powered device 8 and also to the battery pack 7.

 6. In the above item 5, when the battery pack 7 power WlWl=Wmax, the DC digital generator set 11 reduces the engine speed, reduces the fuel consumption, reduces the noise, and works in an optimal state to satisfy the DC digital generator set 11 power generation amount W4W4= Insufficient power Wx2.

 Through the above several working modes, the entire energy management can reach the most energy-saving and most effective state, and meet the energy balance formula: battery pack 7 power W1 + wind turbine 14 power generation W2 + solar generator set 13 power generation W3 + DC digital generator set 11 power generation amount W4W4 = power consumption device 8 power consumption W0.

Claims

 Rights request 1. A hybrid DC power supply control system for a communication base station, comprising an internal combustion generator set (11), a solar generator set (13), and a battery pack (7), characterized in that: the solar power generating set (13) Connected to the power management controller (12) via the communication line (16-1), the discharge resistor (15) is connected to the discharge switch (K1), and the wind turbine (14) is connected via the communication line (16-3) The power management controller (12) is connected, the power management controller (12) is connected to the internal combustion generator set (11) through the communication line (16-2), and the solar generator set (13) and the wind power generator set (14) are respectively connected to the bus bar. Row (10) is connected, the busbar connecting row (10) is respectively connected with the battery pack (7) and the electric equipment (8), and the internal combustion generator set (11) is connected to the busbar connecting row (10);  The wind turbine (14) is powered in parallel with the internal combustion generator set (11), the solar generator set (13) and the battery pack (7), and supplies power to the electrical equipment (8), the wind power generator set (14), internal combustion power generation The unit (11) and the solar generator set (13) are controlled by the power management controller (12), responsible for the management and distribution of the overall energy, and the transmission of information and the transmission of commands.  A hybrid DC power supply control system for a communication base station according to claim 1, wherein said power management controller (12) adopts a CAN communication protocol or an RS485 communication protocol (  3. The hybrid DC power supply control system for a communication base station according to claim 1, wherein said internal combustion generator set (11) comprises an engine (2), a multi-pole permanent magnet generator (3), and a DC digital module ( 9) and the engine management controller (17), the engine (2) is connected to the multi-pole permanent magnet generator (3) and the DC digital module (9) in turn, and the DC digital module (9) is connected to the busbar (10) and the engine respectively. The management controller (17) is connected, the engine management controller (17) is connected to the engine (2), the engine management controller (17) is to the engine (2), the multi-pole permanent magnet generator (3) and the DC digital Module (9) controls.  4. The hybrid DC power supply control system for a communication base station according to claim 1, wherein said solar power generator set (13) comprises a solar battery pack (1) and a DC-DC converter (4), a solar battery pack. (1) Connect the DC-DC converter (4), the DC-DC converter (4) is connected to the discharge switch Kl, the solar battery pack (1) emits electric energy, is converted by the DC-DC converter (4), and is connected via the busbar (10) The amount of power supplied to the consumer (8). 5. The hybrid DC power supply control system for a communication base station according to claim 1, wherein said wind power generator (14) comprises a wind power generator (5) and an AC-DC converter (6). The wind power generator (5) is connected to an AC-DC converter (6) that emits electric energy by tracking an operation mode of wind direction and wind speed and a target power generation amount, and is converted by an AC-DC converter (6) , The amount of power supplied to the powered device (8) through the busbar connection (10).  A hybrid DC power supply control system for a communication base station according to claim 5, wherein said wind power generator (5) employs a direct drive type wind power generator.