SU1020809A1 - Power control device - Google Patents

Description

The invention relates to electrical engineering, in particular to devices for contactless locomotive transport. A device for regulating power in a circuit containing a rectifier, an inverter and a load in a kind is known, series-connected consumers of the same type, having power control circuits containing controllers, comparison organs and power setting units C11. The current in the load is maintained stable, which causes low efficiency of the converter. The closest to the proposed technical essence and the achieved result is a device for controlling power in a circuit including a series-connected rectifier, inverter and load, consisting of a group of consumers with adjustable power, energy consumption, containing a regulator of the output current of the inverter, the output of which is intended to be connected to the control inputs of the rectifier and the inverter, a receiver of signals, the input of which through a communication line is connected to the outputs of transmitters whose inputs with Connected to the outputs of the threshold elements, the number of threshold elements is equal to the number of consumers, the power control circuit of the consumers, each of which contains a series-connected power setting device, the first input of the comparator unit and the power regulator, the output of which is intended to be connected to the user’s input, the second the input of the comparison unit is intended to be included in the power circuit of the consumer iJ The drawbacks of the device is the great complexity and lack of reliability. The purpose of the invention is to increase reliability and simplify the device. The goal is achieved by the fact that the device is equipped with a switching unit and an integrator, all controllers are equipped with additional outputs, the receiver output is connected to the input current regulator input through the successively connected switch unit and the integrator; additional outputs of the respective power controllers. Figure 1 shows the functional diagram of the device for controlling the frequency converter; Fig. 3 shows an embodiment of a switching unit; The converter consists of rectifier 1, inverter 2 and load 3, consisting of several consecutive consumers of the same type, for example, consumer 4. The latter has a control circuit power, consisting of a power setting device 5, a comparison unit 6, a controller 7. A setting device 5 is connected via a block b to a controller 7 and a consumer 4. A current control circuit in the converter load circuit consists of a threshold element nta 8 and transmitter 9, which are located on consumer 4, from receiver 10, switch unit 11, integrator 12, current regulator 13, which are located on converter power blocks: rectifier 1 and inverter 2. Communication between transmitter 9 and receiver NICOM 10 is carried over communication channel 14. The device works as follows. When the consumers are connected in series and located at large distances from the power blocks of the converter, it is advisable to control their power both by changing the resistance of the consumer 4 of the SG, and the current in the load circuit of the converter Зр ,. Regulation of the current makes it possible to increase the efficiency of the device. The magnitude of the power of the consumer 4 is determined by the setting of the setpoint 5 and depends on the current and resistance Rp. The value of R is determined by the regulator signal 7. The current 2 is controlled by the current control circuit in the output circuit of the inverter 2. If at this current Jf, the regulator 7 cannot process the difference signal coming from block 6 (regulator 7 is fully open) , then the threshold element 8, including the transmitter 9, is triggered. The receiver 10 receives a signal fixing the operation of the threshold element 8. At the same time, the block 11 generates a direct current signal of a certain polarity, which is fed to the input of the integrator 12. The voltage at its output when triggered, the threshold element 8 increases linearly. The output current of the inverter, uniquely related to the magnitude of this voltage, increases. When the power consumption is reduced, the controller 7 operates in the active region and the difference signal is processed by the consumer power control system. In this case, the threshold element 8 turns off the transmitter 9. If none of the consumer transmitters is turned on, then there is no signal at the input of the receiver 10, Block 11 generates a signal of opposite polarity, which is fed to the input of the integrator 12. The current Sn drops. The reduction of n occurs to

until one of the consumer controllers 4 is fully opened. The resistance of the consumer Rf, the maximum and the current increases again. A fully open controller has the most uploaded consumer, whose power currently exceeds the power of the other consumers. Other regulators operate in active sites.

One of the implementation options for receiving an o-peredapieg device in an electric locomotive is to follow. The uteMi transmitter is an LC circuit / installed on the electric receiver of the electric locomotive (Fig. 2 K Beli reg is fully open on the locomotive: the key snaps the circuit. The parameters of the circuit are chosen so that, due to the inductive connection With the traction network, reactive resistance was applied to it. Thus, the active resistance introduced by the electric locomotive in the trademark network is additionally introduced by the reactive due to the presence of the LC-circuit, the controller’s Prn operation. On the active section of the t.-circuit, its output is vuyu

part missing. At the moment of an LC circuit canceling, the nature of the load of the frequency converter changes, which can be detected by measuring the angle of the phase difference between the current and the direction at the output of the converter. Thus, the signal transmission is performed by a simple and reliable receiving and transmitting device. Additional elements introduced into the current control circuit in the load circuit (the switching unit and the integrator are simple to implement, reliable in operation, and have a low cost.

5 microchip. One of the variants of switching unit switching is shown in Fig. 3. When a relay is triggered, a source of direct current with a polarity opposite to the source connected

mu earlier.

The use of the proposed device will make it possible to simplify receiving and transmitting equipment and reduce the requirements to the communication channel of consumers and the converter, to extinguish reliable work.

Claims (1)

15'7) A DEVICE FOR REGULATING POWER in a circuit comprising a series-connected rectifier, inverter and load, consisting of a group of consumers with adjustable energy consumption power ', containing an inverter output current regulator, the output of which is designed to connect to the control inputs of the rectifier and inverter . a signal receiver, the input of which through the communication line is connected to the outputs of the transmitters, the inputs of which are connected to the outputs of the threshold elements, the number of threshold elements is equal to the number of consumers, consumer power control circuits, each of which contains a series-connected power regulator, the first input of the comparison unit and a power regulator, the output of which is designed to be connected to the control input of the consumer, the second input of the comparison unit is designed to be included in the consumer's power circuit, characterized in that, in order to increase reliability and simplification, it is equipped with a switching unit and an integrator, power controllers are equipped with additional / auxiliary outputs, and the output of the receiver is connected through a series-connected switching unit and integrator to the input of the output controller g inverter current, inputs of threshold-T ♦ output elements are connected to additional outputs of the respective power controllers.