RU5476U1 - REMOTE POWER SUPPLY DEVICE FOR REMOTE PROTECTION OF ELECTRIC TRANSMISSION VOLTAGE CHAINS - Google Patents

Abstract

1. A device for automatically turning on the backup power supply of voltage circuits for distance protection of a power line, including a device with make contacts, control coils and control signal devices, characterized in that two devices with make contacts are replaced by a two-position intermediate relay, the make contacts of the corresponding positions of which supply voltage on power rails from a working or standby source. 2. The device according to claim 1, characterized in that the contacts of the on-off relay are included in the supply circuit of the operational current to the distance protection of the line.

Description

The device is intended for use in the energy sector, namely in the relay protection technique.

A device for automatic vyutcheniya reserve (ATS) low voltage lines (1). made by contactors, which in the actuated position are held by their catalytic converters. The main disadvantage of this device is that when the coil of the operating power contactor or the backup lithium contactor is energized, their current is continuously flowing around, which leads to excessive electricity supply, and the contactors and the vibration of the magnetic systems of contactors reduce the week of ycTpoiToB.

The closest in technical essence is a device in which two switches are used to supply voltage to the supply names, the make contacts of which supply voltage from the working and backup sources and the control coils of which are de-energized (1).

The switched off power supply is turned off by the signal of the poisoning device and upon the fact that it is turned off by the automatic reserve switching circuit, a control signal is generated to turn on the backup lithium circuit breaker.

The disadvantages of the known device include the presence of two switches with two coils of uravralent on gum, which complicates the device and its control circuit.

closing contacts AByxnoeraviOHiftiM industrial contacts | carbon relay (2), the closing contacts of the corresponding positions of which supply voltage to the power bus from the working and (backup sources).

The relay has two control coils that are in a de-energized state.

Other contacts of the on-off relay are included in the supply circuit of the operational current to the remote.

The indicated circuit is formed by the contacts of the two-position relay and the contacts of the industrial relay controlled by it 1 in-person relay with rear (for operation, connected in series.

In fig. Figure 1 shows p (a measure of the use of an ABP device for voltage circuits for distance protection of a power line when they are powered from voltage transformers of the low side of transformers of a power station without a voltage transformer on the high side.

In fig. 2 give a schematic diagram of a device for automatically turning on the backup power supply of voltage circuits for distance protection of a power line.

In fig. Figure 3 shows a schematic diagram of the tsgm supplying operational current to distance protection.

In fig. 1 :

1-device ABP;

2- voltage transformer of the working voltage source;

3- voltage transformer backup voltage source

4- power rails;

7 - distance protection limit; 10.11 - substation transformers;

12- electric transmission line t;

13 - current transformers of remote protection of the line;

14- separator (switch) transformer. In fig. 2, 3:

1 - on-off relay with control coil 1 -1 and 1 - 2 and contacts 1.1,1.2;

8.9- PROAIU) 1 on-site relays with on-site relay. (+), С-) - operational current.

The device works with us | duks # 1m way.

Normally, when including the automatic transfer switch, the power supply bus 4 receives voltage through the closed contacts 1.1 of the two-position relay 1 from the working source 2.

When a control slug appears, formed by device 6, for example, when the relay of the transformer 10 is activated or from the control switch of the separator (switch) 14, the two-point relay 1 is activated, its working position changes during which closed contacts 1.1 corresponding to this position are pulled, and contacts 1.2 are closed and contacts 1.2 are closed which supply voltage to the power busbars 4 from the backup historian 3. Switching the power supply of the busbars 4 to the working source is performed by the ABP 5 control key by briefly turning it on) 5.1. The scheme provides for switching lithium total 4 to the backup source also with the ABP 5 control key, shortly turn it on in position 5.2. Simultaneously with the removal of voltage from the power supply bus 4 of the two-position relay 1 ABP, the operating current is removed from the distant “4 main switch 1 # 1ty 7. Recovering the operational current on the protection occurs with a delay in the circuit of the series-connected contacts of the two-position relay and the contacts 1 of the relay they switch to response delay 8, 9.

Thus, using the ABP device, a known sequence is observed in the supply, first of alternating voltage, and then of operational current for distance protection to prevent its possible operation during the first switching of voltage circuits.

The proposed device can be used, for example, at substations with a voltage of 110 kV, at which, in the absence of a high voltage voltage transformer, the distance protection of the voltage is limited from the low-voltage voltage transformer. P | M1 disconnecting the transformer, for example, from protections, the remote circuit 1 |

transformer with voltage side of the remaining part of the second

transformer.

It is possible to use on lines whose distant protection

main and backup power.

I.F. Maruda

Literature

1.M.A. Berkovich, A.N. Komarov, V.A.Semenov Fundamentals of automation of power systems, Mosga a, Energoizdat, 1981, pp. 111.112. p. 81, 82.

2. L.I. Kakuevitsky, T.V. Media | Zh (a Handbook of relay of escite and automation, Energy, Moscow, 1972, p. 203, 204.

Claims (2)

1. A device for automatically turning on the backup power supply of voltage circuits for distance protection of a power line, including a device with make contacts, control coils and control signal devices, characterized in that two devices with make contacts are replaced by a two-position intermediate relay, the make contacts of the corresponding positions of which supply voltage on power rails from a working or backup source. 2. The device according to claim 1, characterized in that the contacts of the two-position relay are included in the supply circuit of the operational current to the distance protection of the line.