RU2565065C2 - 110 kv (and higher) switching device - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: 110 kV (and higher) switching device contains three-phase busbar with an individual relay protection and automation set with connected to it phase-by-phase switches, and also breakers between each switch and the respective phase conductor of outgoing overhead power transmission line. Note that each of the named switches is connected to the respective phase conductor of the busbar through the additional circuit breaker with the automatic drive.

EFFECT: improvement of reliability of power supply of the consumers powered by single-circuit power line.

3 cl, 1 dwg

Description

The invention relates to the field of electrical engineering, in particular to electrical equipment of electrical substations.

It is known (1) a switching open switchgear (switchgear) of voltage 110 kV and higher, containing busbars, circuit breakers, disconnectors, isolators and short-circuits, however, the switchgear does not have a backup phase switching device to protect a decommissioned, for example, circuit breaker due to a failure or repair.

It is also known (2) that the switchgear switchgear contains a circuit breaker, disconnector, busbars and connected power lines, but this switchgear also has the disadvantage that it does not have an additional backup switch with adjacent disconnectors and a power line that could to use the working phases when repairing equipment or to use a single-circuit power line when a phase wire is broken.

The aim of the present invention is to improve the reliability of power supply to consumers, powered by a single-circuit power line. This is relevant when you consider that 60% of the number of accidents, in particular single-phase ones, are on the power line, as well as for the possibility of maintaining power supply to consumers via a single-circuit power line with the simultaneous conclusion of phase-by-phase wires for repair.

The goal is achieved in that:

A switching device with voltage of 110 kV and higher, containing a three-phase busbar with phase-connected switches with an individual set of relay protection and automation, as well as disconnectors between each switch and the corresponding phase wire of the outgoing overhead power line, with each of these switches connected to the corresponding busbar phase wire through an optionally provided disconnect switch with automatic drive;

And there is an additional fourth switch, one pole of which is connected to each phase conductor of the busbar through the corresponding additionally provided phase-connected disconnector with automatic drive, and the second pole of the switch is connected through the disconnector to the output one additional wire of the power line;

Moreover, the shutdown solenoid of the drive of the said disconnecting disconnector with an automatic drive is connected to the block contact of the circuit of the corresponding circuit breaker, and the solenoid of turning on the automatic drive of the closing disconnector is connected to the block of the drive of the corresponding said disconnecting switch with the automatic drive.

The figure 1 shows:

A, B, C - phase wires of the busbar;

A OP 1B, B OP 2B, C OR 3B - disconnecting disconnectors operating on automatic shutdown:

1B, 2V, 3V - circuit breakers in each phase;

4B - an additional fourth switch;

A BP 4B, B BP 4B, C BP 4B - switching disconnectors operating on automatic switching;

1PA, 2РВ, 3PC - disconnectors on each phase, adjacent to the corresponding switches (1B, 2V, 3V);

4PA - 4V auxiliary switch disconnector, also connected to the output one additional wire of the power line.

The device operates as follows.

If one of the switches 1V, 2V or 3V is disconnected from manual or automatic control, the corresponding disconnecting disconnector A OP 1B, B OP 2V or C OP 3V will automatically disconnect, and then the corresponding switching disconnector A BP 4V, BP 4V or With BP 4V and then turning on the 4V switch. In this scenario, one of the phase wires 1FP, 2FP, 3FP will be disconnected from the A, B, C buses and there will be no operating voltage on it, and instead of it, the additional fourth switch will turn on the operating voltage on the 4FP phase wire, as a result of which on the wires of a three-phase power line there will be a working three-phase voltage, and the power supply will not be interrupted. This technical solution of the device can be used in case of a single-phase wire breakdown or repair by turning off one of the phase wires 1FP, 2FP, ZFP one by one, respectively including the fourth phase wire 4FP instead. For example, disconnecting the 1V circuit breaker from relay protection during a short circuit to ground on the power line and then disconnecting the corresponding disconnecting switch A OP 1B adjacent to the disconnected switch 1B, and then, after opening the disconnecting switch A OP 1B, turning on the corresponding switching disconnector A BP 4B, adjacent to the fourth additional 4V switch, due to the fact that the shutdown solenoid of the drive of the disconnecting disconnector A OP 1B is connected in the drive to the block contact in the circuit I 1B corresponding switch and a solenoid actuator comprising switching disconnector A BP 4B is attached to the terminal block in the actuator corresponding to said isolation disconnector A OP 1B.

Moreover, the disconnectors 1RA, 2 PB, 3 PC and 4P are switched manually or remotely by operational personnel.

Information sources

1. Reference design of electrical networks under. Ed. D.L. Faibisovich. M.: Publishing House NTs EIAS, 2006

2. Patent No. 110875 of 11/27/2011, "Open switchgear" by R.S. Akhmetshin et al. Published on November 27, 2011 in Byul. No. 33 patents and trademarks.

Claims (3)

1. A switching device of voltage 110 kV and higher, containing a three-phase busbar with phase-connected switches with an individual set of relay protection and automation, as well as disconnectors between each switch and the corresponding phase wire of the outgoing overhead power line, characterized in that each of the above circuit breakers connected to the corresponding phase wire of the busbar through an additionally provided disconnecting disconnector with automatic drive. 2. The switching device with a voltage of 110 kV and higher according to claim 1, characterized in that an additional fourth switch is provided, one pole of which is connected to each phase conductor of the busbar through a corresponding additionally provided phase switching disconnector with automatic drive, and the second pole of the switch is connected through a disconnector to the output one additional wire of the power line. 3. The switching device with a voltage of 110 kV and higher according to claim 1, characterized in that the drive shutdown solenoid of the said disconnecting disconnector with an automatic drive is connected to the block contact of the corresponding circuit breaker circuit breaker, and the switching solenoid of the automatic drive of the closing disconnector is connected to the drive block contact corresponding said disconnecting disconnector with automatic drive.