SU1669046A1 - System for remote control of load along line of force - Google Patents

Abstract

The invention relates to electrical engineering and can be used to remotely control the power of high-pressure gas discharge lamps in outdoor lighting networks. The aim of the invention is to improve the quality of the voltage on the load by using elements with linear current-voltage characteristics in its circuit. A remote load control system consists of receiving and transmitting units, which are used to periodically transmit control commands to a certain half-period of the network voltage. 4 il.

Description

The invention relates to the field of lighting engineering, in particular, to regulators of brightness (power) of high-pressure gas discharge lamps in outdoor lighting networks, the specificity of which is to turn on lamps at full power in the evening time and turn on lamps with lower power, for example half. at night (to increase lamp life and reduce power consumption).

The purpose of the invention is to improve the quality of the voltage on the load by using elements with linear volt-amperes in its circuit. Characteristics.

1 shows a diagram of the transmitting unit of the system, FIG. 2 diagram of the receiving unit of the system; Fig. 3 and k are voltage and current timing diagrams explaining the operation of the remote load control system for the power target.

The transmitting unit (figure 1) is made. in the form of control pulp i and contains two input terminals 1 and 2 for connecting the transmitting unit to the wires of the AC power supply source 3. Input terminal 1 through the wiring contacts .1 of the contactor C and input terminal 2 is directly connected to the power line with wires respectively 5 and 6, connected to gas-discharge light sources. To the contacts of the contactor is connected the node 7, formed from the diodes 8 and 9, connected

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interconnected in series and counter-anodes, and from thyristors 10 and 11 connected in counter-parallel with the corresponding diodes 8 and 9. One output of the pulsed-phase control unit 12 is connected to the junction of the anodes of diodes 8 and 9 and the thyristor cathodes 10 and 11, and the other output of the pulse 12 phase control is connected to the control electrode of the thyristor 10 through a series-connected diode 13 and resistor 1, and also connected to the control electrode of the thyristor 11 via a series-connected diode 15 and resistor 16. Anode The resistor 10 is connected to its control electrode via series-connected closing contacts of relay 17-1, the disconnecting contacts of relay 18-1 and diode 19, and the anode of the thyristor 11 is connected to its control electrode via series-connected closing contacts of relay 17-2, opening contacts relays 20-1 and diode 21. The cathodes of diodes 8 and 9 are interconnected via counter-cathodes connected diodes 22 and 23, and diodes 8, 9, 22 and 23 form a single-phase rectifying bridge, and the connection point of the cathodes of diodes 22 and 23 is connected to the input block 12 named ulsno-phase control via parallel connected relay make contacts 18-2 and 20-2. Wires 5 and 6 of the power line are connected to each other through series-connected resistor 2h and a circuit formed from parallel-connected closing contacts of relay 18-3 and 20-3, and input terminals 1 and 2 are connected to each other via series-connected closing contacts of relay 17-3 disconnecting contacts of the relay, 20-1 + and the control coil of contactor A, and the connection point of closing contacts, clock ticks and disconnecting contacts of relay 1b-C is connected to wire 6 of the power line through a generator of 25 low frequency pulses, to the outputs of which th is connected via the break contacts 26-1 relay control relay coil 18 and via make conductive contactors 26-2 relay coil 20. The relay control controlling the relay coils 17 and 26 are connected to respective outputs of control unit 27. Unit 12 pulse-phase pack0

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This line contains a chain formed from series-connected resistors 28 and zener diode 29, connecting the input of unit 12 to its first output, intended to be connected to the cathodes of thyristors 10 and 11. Parallel to Zener diode 29, series-connected resistor 30 and capacitor 31 are connected, the connection point of resistor 28 and the zener diode 29 is connected through a series-connected resistor 30 and a capacitor 31 to the first output of the block 1 2 and connected through the resistor 32 to the second base of the single junction transistor 33, the first base cat The op is connected to the second output of the block 12 for connection to resistors and 16, and the control electrode of the single junction transistor 33 is connected to the junction point of the resistor 30 and the capacitor 3 1.

The receiving unit (Fig. 2) of a remote load control system connected to wires 5 and 6 of the power line and consisting of a high pressure discharge lamp connected in series and two ballast chokes 35 and 36, contains an actuator 37 that controls the operation of the relay 38, shunt in the initial state by its opening contacts 38-1 choke 36, as well as containing the first 39 and the second 40 receiving nodes. Receiving node 39 contains a diode 41, a capacitor 2 and resistors 3 and a CC, connected in series and connected to the wires 5 and 6 of the power line, and a diode 5 and a diode 6 and a resistor 8 parallel to the resistor connected in parallel with the resistor 5 capacitors A 2 and resistors 3 and M are connected in series, a resistor 9 is connected, and the output of receiving unit 39, intended to be connected to the control input of the actuator 37, is connected via a Zener diode 50 to a connection point of resistors 3 and, at this point to The diode of the Zener diode 50 is connected to the cathode di. 5 and with the diode anode 6. Receiving node 0 is made similar to node 39 on the basis of identical corresponding elements 51-59, the only difference is in the opposite polarity of the circuit switching of the diodes 51g5b and zener diode 60 as compared to the corresponding diodes 41, 45 and 46 and the zener diode 50 receiving unit 39. The actuator 37 contains a constant voltage transducer 61 connected to the power line leads 5 and 6 (serves to power the relay 28), the output of which is through parallel connected resistor 62, a diode 63 and a relay coil 38 It is connected to the anode of the lockable thyristor b, the cathode connected to the power line wire 6, and the control electrode connected to the outputs of the receiving nodes 39 and 40. The receiving nodes 39 and 40 and the actuator 37 interconnected form a semiconductor relay 65.

The outdoor lighting network contains a plurality of parallel-connected loads and receiving units, similar to those shown in FIG.

Time diagrams illustrating the process of remote control by switching on a gas discharge lamp 3 with limiting power dissipation, for example, twice the nominal, shows (Fig. 3) the voltage U in the power line with wires 5 and 6, the current i in the power line flowing through the wires 5 and 6, the pulse voltage Uu of the thyristor control 10 and 11, acting at the output of the block 12 of the pulse-phase control, the voltage UC1 on the capacitor of the receiving node 39, to the voltage Up on the coil of the relay 38.

Timing diagrams illustrating the process of remote control of switching on a gas discharge lamp 34 to full nominal power (Fig. A), in contrast to the diagrams shown in Fig. 3, shows the voltage UC2 on the capacitor 57 of the receiving node 40.

The operation of the remote control system for the load on the power circuit is characterized by the following modes: on and off modes (in which in the first case the power supply 3 is applied to power line wires 5 and 6, and the discharge lamp is switched on in the second case limited (half) power,

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the gas discharge lamp 34 is turned on at full power.

To turn on the gas discharge lamp 34 under the voltage from the outputs of the control unit 27, a supply voltage is applied to the winding of the relay 17, which leads to the operation of the relay 17 and the closure of its contacts 17-1, 17-2 and. When the contacts are closed, the alternating voltage of the power source 3 is applied to the collector 4 coil through the closed contacts of the relay 17-3 18-4, 20-4. This leads to the operation of the contactor 4, the closure of its contacts 4-1 and to the supply of supply voltage on the wire 5 and 6

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power line and, as a result, leads to the glow of the gas discharge lamp 34.

To switch off the gas discharge lamp 34, it is sufficient in the control unit 27 to remove the voltage from the coil of the relay 17i so that the contacts 17-1, 17-2, 17-3 open, the coil of the contactor 4 is de-energized, the contacts of the contactor 4 are open, the voltage on the wires 5 and 6, the power line disappears and the electrical discharge in the lamp 34 disappears.

In the mode of switching on the gas discharge lamp 34 at half power (it is assumed that the lamp discharge 34 was previously loaded at full power, since the relay coil is de-energized and the choke 36 is bridged by the contacts 38-1 of the relay 38) the remote control system operates as follows. From the outputs of the control unit 27, the voltage is applied to the control coil of the relay 17 (the control coil of the relay 26 is de-energized). In this case, the relay contacts

17 (contacts 17-1, 17-2, 17-3) will be permanently closed, the control coil of contactor 4 will be fed through the closed relay contacts

18 and 20 (pins 18-4 and 20-4) alternating voltage of the source 3 of power supply, which through closed contacts will go to the generator inputs 25 pulses of infra-low frequency. The latter will result in the appearance at the generator outputs of 25 rectangular voltage pulses (for example, with a frequency of following one pulse every half hour and a duration of one second). These pulses arrive at the coil control0

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lazy relay 18 measure closed contacts relay 26-1. Under the influence of the pulses of the generator 25, the relay 18 periodically operates, its contacts 18-1 and 18-1 open, and contacts 18-2 and 18-3 close. When the contacts 18-1 of the relay open, the anode of the thyristor 10 is disconnected from its control electrode and the thyristor 10 can now be turned on only by the action of the output signal of the pulsed-phase control unit 12. After the opening of the contacts of the relay 18-4, the control coil of the contact b is de-energized and the contacts of the contactor periodically open for the duration of the action of the pulses of the generator 25. When the contacts of the relay 18-2 close (which takes place either in the pause of the generator 25 pulses in the case of a de-energized control coil of the relay 26 or in the presence of voltage on the control coil of the relay 26) the input of the unit 12 of the pulsed-phase control unit is connected via diodes 22 and 23 single-phase rectifying bridge to node 7. As a result, the output of the pulsed-phase voltage unit 12 produces pulses with a delay in time t3a relative to the moments of zero current in the power line (i) of negative polarity (FIG. 3), which arrive t on the control electrodes of the thyristors 10 and 11. Only the thyristor 10 will switch on the output pulses of the pulsed-phase control unit 12, and the thyristor 11 will be turned on via the anode circuit through the closed contacts of the relay 20-1 and 17-2 and diode 21. the contacts of the relay 18-3 to the wires 5 and 6 of the power line connect a resistor, with which the thyristor is turned on 10 by the output pulses of the unit 12 (Uu) of short duration. As can be seen from the timing diagrams depicted in FIG. 3, during a pulse generator 25 (t) action time in half-waves of positive polarity, short-term dips appear on the power line wires 5 and 6 with a duration determined by the capacitor charge time 31 in the block 12 of the pulse-phase control up to the tripping voltage of the unijunction transistor 33. The presence of dips in the half-waves of the positive voltage

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polarity on wires 5 and 6 of the power line is a command for the relay 65 of the voltage pulse voltage to turn on the relay 38, connecting when the contacts 38-1 open, an additional choke 36 in the supply circuit of the gas discharge lamp 3, removing the current, power dissipation and the brightness of the lamp 3.

The relay 65 of the polarity of the voltage pulses, which is the receiving unit of the system, reacts to dips in the half-waves of the positive-polarity voltage on wires 5 and 6 of the power line as follows. The supply voltage half-waves of positive polarity (U) enter the receiving node 39 through diode M to the input of a differentiating RC circuit formed from a k2 capacitor and a resistor voltage divider consisting of resistors 3 and No. As a result, exponentially increasing in amplitude voltage pulses, under the action of which a cyclic charge through a diode, of a capacitor 7 (time diagram of the voltage on the capacitor 7 LTS,), subject to in the pauses between the pulses of the block 12 () through the resistor 48. The resistor (9 in the receiving node 39 performs the function of discharge of the capacitor 42 in the pauses between the pulses of the block 12 (Uvj), and the diode 45 excludes the formation of voltage pulses on the resistor 44 After the voltage on the capacitor 47 (Ucf) rises, before the voltage of the Zener diode 50 (time tz, Fig. 3), the current pulses flow through the Zener diode 50 of the receiving node 39 and the control electrode of the thyristor B of the executive body 37 thyristor b1 and, as a result, leads to the appearance of a constant voltage (Up) on the winding of the relay 38. Resistor 62 in the actuator 37 ensures that the thyristor 64 is turned on by short-time control pulses, and diode 63 protects the thyristor 64 from overvoltages caused by A control coil of a relay 38 with significant inductance.

When the gas discharge lamp 3 was turned on at full power (assuming, for example, that the gas discharge lamp 3 had previously been turned on with limited power, since the control coil of the relay 38 was under voltage, the contacts 38-1 of the relay 38 were open and the lamp 3 was powered through Two ballast throttles 35 and 36) in the voltage control unit 27 are supplied to both control coils of the relay 17 and 26. At the same time, the output pulses of the generator will come through the closed contacts of the relay 26-2 to the control coil of the relay 20. This will lead to periodic closure of m relay contacts 20-1, 20-k and m-circuiting the contacts 20-2 and 20-3. The transmitting unit (Fig. 1) operates when the discharge lamp Z is turned on at full power as it is turned on with limited power. The only difference is that the output pulses of block 12 will now turn on thyristor 11, and the turning on of thyristor 10 will occur along the anode circuit through the closed contacts of relay 18-1, 17-1 and diode 19. As a result of this difference in the operation of the transmitting unit circuit (Fig. 1) during the operation of the pulses of the generator 25, the short-term dips are now in half periods of negative polarity across the wires 5 and 6 of the power line (time diagram of the voltage U, Fig. J), which is the command for relay 6 polarity of voltage pulses D.2) to turn on the gas discharge lamp 3 at full power. This command is executed by removing the voltage from the coil of the control of the relay 38 and, as a result, by shunting its contacts to the additional throttle 36. The latter leads to an increase in the current, power and brightness of the gas discharge lamp 3.

The relay 65 of the polarity of the voltage pulses reacts to dips in the half-waves of the negative-polarity voltage on wires 5 and 6 of the power line is basically the same as when exposed to dips in the half-waves of the positive-polarity voltage. The only difference is that in this case, the turn-on signal of the thyristor of the executive organ

37 is formed in the receiving node 0. Thus, when negative voltages are applied in the half-waves of the negative polarity on the power line wires 5 and 6, the cyclic charge of the capacitor 57 occurs on the receiving node kO (voltage diagram on the capacitor 57 and in Fig.), Similarly

Q charge of the capacitor V /, and after the increase of the negative voltage on the capacitor 57 to the voltage of the breakdown of the Zener diode 60 through the control electrode of the thyristor 6C

5 leak negative polarity pulses locking the 6C thyristor and, as a result, de-energizing the control relay coil of $ 3

Dunn remote system

Control has increased noise immunity. This is achieved by periodic transmission (with the pulse frequency of the generator 25) control commands and use

5 storage capacitors A 7 and 57 in the receiving nodes 39 and kO, which prevent the receiving unit (FIG. 2) from tripping from single impulse noise.

Q System elements in steady state do not distort the supply voltage of the gas discharge lamps, since the current of the lamps flows through the linear chokes.

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Claims (1)

Invention Formula A power line remote control system comprising a transmitter unit with a terminal for connection to the first power line wire and a terminal for connecting a power source and a power line to the second wire, a receiver unit with a terminal for connecting to the first power line wire and a terminal for communication the second power line, characterized in that, in order to improve the quality of the voltage on the load, the transmitting unit is equipped with a terminal for connecting to the first wire of the power source and is designed as a control panel, four relays, a contactor, a low-frequency frequency pulse generator, a pulse-phase control unit, two thyristors, a single-phase rectifying bridge a, four diodes and three resistors, windings are connected to the control panel the first and second relays, the contactor winding through successively disconnecting the first disconnecting contacts of the third and fourth relays and the first closing contact of the first relay are connected between the output for connecting the power supply to the first wire and the output for connecting the power supply and power line to the second wire pulses of infra-low frequency are connected by their inputs between the combined outputs of the first closing contact of the first relay and the first disconnecting contact of the third relay and the output for connecting neither to the second wire of the power source and the power line, to the output of the infra-low frequency pulse generator are connected, respectively, via the disconnecting and closing contacts of the second winding relay of the third and fourth relay, the closure contact of the contactor is connected between the output for connecting the first power supply wire and the output for connecting to the first the power line wire, to which the single-phase rectifier bridge input is connected, parallel to the counter single-phase rectifier bridge valves connected by anodes, Thyristors are connected, the control electrode of each of which is connected to its anode through serially connected first or second diode, second or third closing contacts of the first relay and second disconnecting contact of the third or fourth relay, respectively, as well as the output of the pulse-phase control unit through serially connected the third or fourth diode and the first or second resistor, respectively, with all the diodes connected to the control electrodes of the thyristors cathodes, the input of the pulsed-phase unit control is connected through parallel connected first closing contacts of the third and fourth relay to the output of a single-phase rectifying bridge, the third resistor is connected via parallel connected second closing contacts of the third and fourth relay between the output to connect to the first power line wire and output to connect to the second source wire power and power line, and the receiving unit is made in the form of the first and second receiving units and the executive body, each of the receiving units made in in the form of three diodes, a Zener diode, two capacitors and four resistors, while the anode of the first diode of the first receiving node is connected to an output for connecting to the first power line wire, and its cathode is connected to the first output of the first resistor and capacitor of the specified node, the second output of the specified capacitor is connected through the second resistor with the cathodes of the Zener diode and the second diode, the first output of the third resistor and the anode of the third diode of the same node, with the second terminals of the first and third resistor, the anode of the second diode connected to the output ode for communication with the second wire of the power line, the cathode of the third diode is connected through parallel connected second capacitor and the fourth resistor of the mentioned node and the output for connection with the second wire of the power line, the second receiving node is made and connected similarly to the first, while the diodes and the zener diode The second receiving node is connected in the opposite direction with respect to the corresponding diodes and the Zener diode of the first receiving node, the anode of the Zener diode of the first receiving node and the cathode of the Zener diode of the second receiving node along key to entry executive connected between the terminal for connection to a first wire of the power line and the terminal to communicate with the second power line wire. about SP with vC "N 3 L 5 "m