SU391678A1 - METHOD OF AUTOMATIC SHUTTING OF THE SHUNTING REACTOR - Google Patents

Description

one

This invention relates to electrical networks with a voltage of € 0.k.

Methods are known for automatically shutting off a shunt reactor connected to a long-distance power transmission through a series-connected disconnecting device and switching device with a spark connection device, and emergency shutdowns of the line.

Such methods are characterized by a decrease in dynamical stability and an increase in overvoltages when the asynchronous travel or asymmetric short circuits are disconnected, as well as the nipn automatic inoBToperate switching on and the disconnection of the line at its ends.

In order to increase the stability and reliability of zash; ity from internal transient impulses to shut off the reactor are served during the fast operation, for example, the high-frequency differential-phase protection is on the nearest power lines, delaying it for a time longer than the spread time in switching off the switches This line is protected, then the arcing contacts of the disconnecting device are opened for a time until the voltage on the LINE decreases below the breakdown voltage of the spark connection device. yucheni, in this time interval open con2

ticks that shunt this device, and after it ends, the arcing contacts close.

In the drawing, a diagram of an apparatus for carrying out the proposed method (one of the options).

In the diagram: 1.2 — lines extending from the substation; 3-6 - linear switches; 7 - reactor; 8 - spark connection device (UMP); 9 —contractors. Contacts of the air circuit breaker used as a combined switching apparatus of the reactor; W - contacts of the separator switch, shunt the t &c; A / - output. Relay of high-speed protection; 12 - intermediate relays of a delay of the disconnecting pulse.

When the line is cleared / triggered, for example, differential-phase protection is “

1 applies pulses to turn off switches 3 and 4. From output relay 11, an impulse is fed to an intermediate relay 12, which with a delay sends a pulse to turn off arcing contacts 9. Further, due to

adjustment of pneumatic valves is provided with a time shift of 0.02-0.05 s, disabling the shunt contacts 10 and the subsequent closure through 0.1-0.15 s sec contacts 9.

In the separation of pneumatic systems switchable switching. devices and devices in the PIU; pneumatic control of the sequence of work of the contacts is replaced by electric. , Intermediate relay 12 can be disconnected by increasing the own time of the disconnecting contacts of the switching annaipaTa. The invention can be used on high-voltage, high-voltage power lines. The subject of the invention is a method of automatically shutting down a shunt reactor that is connected to a distant power transmission through a series-connected disconnecting device and switching device with a spark connection device, at aVa p1iinyh. line disconnections, characterized in that, in order to increase the stability and reliability of protection against internal overvoltages, the impulse to shut down peaiKTOpa is given when high-speed protection is triggered on the nearest power lines, delaying it for a time longer at the ends of the line under the action of the specified protection, then the arrester is blown down on the contacts of the disconnecting device for a time, while the voltage on the line does not decrease below -npOdftBHorQ / Array of the spark device: V0go1 plug, When this time interval is open, the contacts shunting this device., and after its termination the arcing contacts are closed .-;