SU465667A1 - High voltage switch - Google Patents

Description

The invention relates to high-voltage switching devices and is intended to enable and disable high-voltage circuits of any voltage class.

High-voltage switches containing three poles are known, each of which has an optical-electronic current transformer built in the form of a transmitting unit installed on high-potential parts, and a receiving unit, relay protection units and an optical control system. However, the known switches are complex in design, and the opto-electronic current transformers used in them have insufficient noise immunity.

In order to eliminate the above disadvantages, the proposed switch is equipped with a thermostatic camera mounted on high-voltage parts of the middle pole, in which a relay protection unit is installed on static relays, the transmitting unit of the opto-electronic current transformer of the middle pole and the receiving units of the opto-electronic transformers the current of all poles, the outermost of which are connected to the corresponding transmitting units of opto-electronic current transformers of the extreme phases by means of optical fibers, individuality transmit a signal to the switching poles as the extreme of relaying unit and the optical control system which is mounted in the support mean pole switch. The drawing shows a block diagram of a three-phase high-voltage switch.

The poles 1-3 of a three-phase high-voltage circuit breaker located on the open part of the substation are separated from each other at a distance determined by the class of voltage of the connection on which the circuit breaker is installed. The transmitting unit 4 of the opto-electronic current transformer of phase A is built into the pole 1 of the switch and connected to the receiving unit 5 by means of a light guide

6 (e. G., Fiberglass with regular or irregular piling) calculated for a linear connection voltage. To the receiving unit 5 of the opto-electronic current transformer of phase A is connected

Relay protection unit 7, made on small static relays. In addition, unit 7 is connected to receiving units 8 and 9 of opto-electronic current transformers of phases B and C, respectively. Elements 5, 7,

8, 9 are placed on the parts of the pole 2 of the switch, having a high potential, in a thermostatically controlled chamber built into the pole. The transmitting unit 10 is located on the parts of the pole 2 switch having a high

potential. The transmitting unit 11 is located

on the parts of the pole 3 switch having a high potential. The light guides 6 and 12 connect unit 7 to the poles 1 and 3 of the switch, respectively, and the light guide 13 connects to the pole 2. In the insulating pole supporting structure of the pole 2 of the switch, an optical switch control system is installed, the receiver 14 of which is under high potential at the pole of phase B. The receiver 14 is connected by a light guide 15 to a transmitter of the control system, located in the axis of the type pole, having the potential of the earth.

The command to switch the switch on or off from the substation control panel is transmitted through the communication cable channel and transmitted to the receiver 14 via the optical control system. The receiver signal is converted into the light flux of the radiation sources through the optical flux of the radiation sources and transmitted via optical fibers 6, 12 and 13 to devices to turn off or turn on the poles of the switch. Information about the position of the contacts of the switch (phase B poles) in the form of a luminous flux of an additional radiation source can also be transmitted to the control panel via the light guide 15 of the control system.

Information about the magnitude and phase of the current in the current-carrying parts of the high-voltage connection, on which the switch is installed, in the form of a modulated radiation source comes through the optical fibers from transmitting units 4, 10 and And opto-electronic current transformers to receiving units 5, 8, 9, respectively where it is converted into an electrical signal controlling the action of the relay protection. When the connection is disrupted during normal operation, the relay protection unit is activated, which, using optical fibers 6, 12 and 13, uses an optocoupler to emit a pulse to switch off the poles of the switch, and after a delay, automatically restarts.

The power supply of the relay protection unit of the n receiving units of optoelectronic current transformers is supplied from a stabilized power source installed in

a thermostated chamber that takes energy from a high voltage connection (for example, through a fast-sinking current transformer installed on the 2-pole conductor), and in the absence of current in the current-carrying parts of the connection from a voltage transformer or a battery, specifically for this purpose installed.

Subject invention

High-voltage switch containing three poles, each of which

integrated optoelectronic current transformer, made in the form of a transmitting unit installed on high potential parts, and a receiving unit, a relay protection unit and an optical control system, characterized in that, in order to simplify the design and improve the noise immunity of optical electronic current transformers It is equipped with a thermostat-controlled camera installed on high-potential parts of the middle pole, in which a relay protection unit is installed, mounted on static relays, transmitting an optical-optical unit middle-current ktron current transformer and receiving units of opto-electronic current transformers of all poles, the outermost of which are connected to the corresponding transmitting units of opto-electronic current-phase transformers of the outer phases by means of optical fibers capable of transmitting the signal for switching the extreme poles both from the relay protection unit and from optical control system, which is installed in the support of the middle pole of the switch.