SU817837A1

SU817837A1 - Method of remote control of short-circuiting switch in glaze ice melting network

Info

Publication number: SU817837A1
Application number: SU792763405A
Authority: SU
Inventors: Рита Михайловна Рудакова; Мурат Бакеевич Гузаиров; Факиль Халимович Усманов
Original assignee: Уфимский авиационный институт им.Орджоникидзе; Башкирское Районное Энергетическоеуправление Башкирэнерго
Priority date: 1979-05-07
Filing date: 1979-05-07
Publication date: 1981-03-30

Description

(54) СПОСОБ ДИСТАНЦИОННОГО УПРАВЛЕНИЯ ЗАКОРАЧИВАЮЩИМ ВЫКЛЮЧАТЕЛЕМ В СХЕМАХ ПЛАВКИ ГОЛОЛЕДА(54) METHOD FOR REMOTE CONTROL BY SHORT CIRCUIT BREAKER IN THE NAVIGATION MELTING CIRCUITS

1one

Изобретение относитс , к электроэнергетике и может быть использовано при плавке гололеда на лини х электропередачи.The invention relates to electric power industry and can be used in melting ice on power lines.

Известен способ управлени коммутационными аппаратами электроустановок, основанный на подаче на линию напр жени плавки, отличного от номинального 1.A known method of controlling switching devices of electrical installations, based on the supply of a melting voltage to the line other than nominal 1.

Однако этот способ управлени требует применени при плавке напр жени отличного от номинального.However, this method of control requires the use of non-nominal voltage when melting.

Наиболее близким к предлагаемому по технической сущности и достигаемому результату вл етс способ дистанционного управлени коммутационными аппаратами в схемах плавки гололеда с головного пункта , заключающийс в передаче сигнала на включение выключател по обогреваемой линии. При этом на коммутационный аппарат подают в виде кодовой серии сн ти напр жени с линии электропередачи путем последовательных отключений и включений головного коммутационного аппарата 2The closest to the proposed technical essence and the achieved result is the method of remote control of switching devices in ice melting schemes from the head office, which consists in transmitting a signal to turn on the switch via a heated line. At the same time, the switching device is supplied in the form of a code series to relieve voltage from the power line by successive trips and switching on of the head switching device 2

Применение данного способа значительно сокращает срок службы головного коммутационного аппарата, требует наличи кодирующего устройства на пункте управлени и дещифратора на закорачивающем пункте , предъ вл ет высокие требовани к точности посылаемого кода.The use of this method significantly shortens the service life of the head-end switching device, requires an encoder at the control point and a decipher at the shorting point, and places high demands on the accuracy of the code sent.

Цель изобретени - повыщение надежности .The purpose of the invention is to increase reliability.

Поставленна цель достигаетс тем, что в способе дистанционного управлени закорачивающим выключателем в схемах плавки гололеда, с головного пункта, заключающемс в передаче сигнала на- включение выключател по обогреваемой линии, команду управлени на закорачивающий выключатель передают включением линии на напр жение с обратной последовательностью чередовани фаз.The goal is achieved by the fact that in the method of remote control of a shorting switch in ice melting schemes, from the head station, which consists in transmitting a switch to turn on the switch along a heated line, the control command is transmitted to the shorting switch by switching the line on to a voltage with a reverse phase sequence.

. Использование в качестве управл ющей команды на включение выключател напр жени обратной последовательности позвол ет повысить срок службы головного коммутационного аппарата, значительно упростить способ управлени и отказатьс от каких-либо кодированных сигналов на включение выключател .. The use of a reverse sequence voltage switch as a control command allows to increase the service life of the head-end device, greatly simplify the control method and reject any coded signals to turn on the switch.

Claims

The drawing shows a variant of the control circuit of the shorting switch in ice melting schemes illustrating the proposed method. The control circuit of the shorting switch 1 consists of a negative sequence current filter 2, an exposure block 3, a switching device 4, a current relay 5 and a switching device 6. The control method of the switch 1 is as follows. At the head substation, a heated power line is connected to ice melting winches with a change in the order of phase alternation in the line. In this case, a signal appears at the output of filter 2 and the switching on device 4 with the time delay caused by the exposure block 3 will turn on the switch 1. At the end of the ice melting process, the line is disconnected at the head substation, the current in it disappears and the current relay 5 outputs disconnecting device 6, which disconnects the switch. If an operating voltage is applied to the line, then the shorting switch 1 will not turn on, since there is no signal at the output of the filter 2 of negative sequence currents. In case of occurrence in the lines as a result of short-circuiting of the reverse sequence currents on it, the switch 1 will not turn on, since the line is turned off by the relay protection before the time delay unit issues a turn-on signal. The power of the on and off device may be from capacitor banks or other operating current sources. The application of the proposed method of remote control of a shorting switch in ice melting schemes will prolong the life of the head switching device, since it does not produce a code series of inclusions and disconnections, refuses to use an encoder at the control point and decipher on the shorting point and thereby simplifies control and, consequently, increase its reliability, especially for lines where smelting is carried out at operating voltage. Claims The method of remote control of a shorting switch in ice melting schemes from the head station consists in transmitting a signal to turn on the switch via a heated line, characterized in that, in order to increase the reliability of control, the control command is transmitted to the shorting switch by switching the line to a reverse sequence phase rotation. Sources of information taken into account in the examination 1. USSR author's certificate number 599306, cl. P 02 G 7/16, 1978.

2. USSR author's certificate number 390626, cl. H 02 J 13/00, 1974.