SU1274023A1

SU1274023A1 - Device for signalling conditions and checking relay protection

Info

Publication number: SU1274023A1
Application number: SU853914268A
Authority: SU
Inventors: Лидия Адамовна Лысцова; Владимир Павлович Федотов
Original assignee: Уральский политехнический институт им.С.М.Кирова
Priority date: 1985-06-26
Filing date: 1985-06-26
Publication date: 1986-11-30

Abstract

Изобретение относитс к релейной защите и противоаварийной автоматике электротехнических установок и предназначено дл сигнализации срабатывани и осуществлени контрол исправности аппаратуры дискретной автоматики, например устройств релейп ной защиты без выведени их из рйботы и без отключени защищаемого объекта . Целью изобретени вл етс расширение области применени и повышение удобства эксплуатации устройства . Введение в устройство третьего элемента И, второго элемента ИЛИ и второго замыкающего контакта ключа управлени с нейтральным положением позвол ет использовать изобретение дл электрических систем как не оборудованных автоматическим повторным включением, так и при его наличии . Удобство эксплуатации повьшаетс за счет использовани первого контакта ключа управлени дл создани контрол релейной защиты, а втосо рого контакта - дл сн ти запомненного сигнала о ее срабатывании в результате короткого замыкани в защищаемом объекте. 1 ил. 1C vj Is9 СОThe invention relates to relay protection and emergency control automation of electrical installations and is intended to signal the operation and monitor the health of discrete automation equipment, such as relay protection devices without removing them from the drive and without disabling the protected object. The aim of the invention is to expand the scope and improve the usability of the device. Introduction to the device of the third element AND, the second element OR, and the second closing contact of the control key with a neutral position allows the invention to be used for electrical systems not equipped with automatic reclosing or when it is present. Convenience of operation is increased by using the first contact of the control key to create a control of the relay protection, and the second contact to remove the stored signal of its operation as a result of a short circuit in the protected object. 1 il. 1C vj Is9 CO

Description

Изобретение относитс к релейной защите и противоаварийной автоматике электротехнических установок и предназначено дл сигнализации срабатывани и осуществлени контрол ис-,. правности аппаратуры дискретной автоматики , например, устройств релейной защиты без выведени их из работы и без отключени защищаемого объектаThe invention relates to relay protection and emergency control of electrical installations, and is intended to signal the actuation and control of the system. the correctness of discrete automation equipment, for example, relay protection devices without removing them from work and without disabling the protected object

Цель изобретени - расширение области применени и Повьщгение удобств эксплуатации устройства дл сигнализации и контрол релейной защитыThe purpose of the invention is to expand the scope and application of the convenience of operating the device for signaling and controlling relay protection.

На чертеже показана схема пред ,лагаемо го устройства.The drawing shows a schematic diagram of a prior device.

Устройство дл сигнализации и контрол релейной защиты содержит последовательно соединенные входной блок 1, измерительно-логическийThe device for signaling and monitoring of relay protection contains input-unit 1 connected in series, measuring-logic

2и выходной 3 блоки релейной защиты 4, выход которой св зан с механизмом 5 переключени коммутационного аппарата, RS-триггер 6, выход которого подключен к индикатору 7 и первому входу элемента И 8, источник 9 контрольного сигнала, ключ 10 управлени с нейтральным положением через первый замыкающий контакт 11 соединен с вторым входом элемента2 and output 3 relay protection blocks 4, the output of which is connected to the switching device 5 of the switching device, RS flip-flop 6 whose output is connected to the indicator 7 and the first input of the And 8 element, the source 9 of the control signal, the control key 10 with the neutral position through the first make contact 11 is connected to the second input of the element

И 8, с инверсным входом элемента И . 12, с первым входом элемента ИЛИ 13 и с первым входом .элемента И 14, выход элемента И 14 соединен с вторым входом элемент а ИЛИ 15, выход элемента ИЛИ 15 подключен к R-входу триггера 6, триггера 6 соединен с выходомAnd 8, with the inverse input of the element And. 12, with the first input of the element OR 13 and with the first input of the element AND 14, the output of the element AND 14 is connected to the second input of the element a OR 15, the output of the element OR 15 is connected to the R input of the trigger 6, the trigger 6 is connected to the output

элемента ИЛИ 13, второй вход которого соединен с выходом элемента И 12, второй вход элемента И,14 и первый вход элемента И 12 подключены к точке соединени выходного блокаthe element OR 13, the second input of which is connected to the output of the element And 12, the second input of the element And, 14 and the first input of the element And 12 are connected to the connection point of the output block

3и механизма 5 переключени коммутационного аппарата, выход элемента И 8 подключен к точке соединени входного блока 1 и измерительнологического блока 2, замыкающий контакт 16 ключа управлени с нейтральным положением 10 соединен с первым входом элемента ИЛИ 15.3 and the switching device switching mechanism 5, the output of the element AND 8 is connected to the connection point of the input unit 1 and the measuring unit 2, the closing contact 16 of the control key with the neutral position 10 is connected to the first input of the element OR 15.

Устройство работает следующим образом.The device works as follows.

Сигнал, несущий информацию о состо нии защищаемого объекта, формируетс во входном блоке 1 при помощи , например, измерительных трансформаторов тока и напр жени и с его выхода поступает на вход релейной защиты 4. При осутствии аварийнойThe signal carrying information about the state of the protected object is generated in the input unit 1 by means of, for example, measuring current transformers and voltage, and from its output is fed to the input of relay protection 4. In the event of an emergency

ситуации на защищаемом объекте нет сигнала на выходе измерительно-логического блока 2 релейной защиты, входе и выходе выходного блока 3,situation on the protected object there is no signal at the output of the measuring-logic unit 2 relay protection, input and output of the output unit 3,

на вход механизма 5 переключени коммутационного аппарата. В режиме работы устройства без контрол ключ 10 управлени находитс в -нейтральном положении, замыкающие контактыto the input of the switching mechanism switching mechanism 5. In the mode of operation of the device without control, the control key 10 is in the neutral position, the closing contacts

его 11 и 16 разомкнуты. При этом сигналы на входах и выходах всех логических элементов и RS-триггера отсутствуют и индикатор 7 выключен. При контроле исправности замыкаетс первый контакт 11 ключа 10 управлени . Сигнал от источника 9 контрольного сигнала поступает на инверсньй вход первого элемента И 12, на первый вход второго элемента И 14,his 11 and 16 are open. In this case, the signals at the inputs and outputs of all logic elements and the RS flip-flop are absent and the indicator 7 is turned off. When monitoring the health, the first pin 11 of the control key 10 is closed. The signal from the source 9 of the control signal is fed to the inversion input of the first element And 12, to the first input of the second element And 14,

на второй вход третьего элемента И 8 и через первый элемент ИЛИ 13 на динамический S-вход триггера 6, Триггер 6 переключаетс и с выхода его сигнал подаетс на первый вход третьего элемента И 8 и индикатор 7, который включаетс . С выхода третьего элемента И 8 сигнал поступает на вход релейной защиты 4.to the second input of the third element AND 8 and through the first element OR 13 to the dynamic S input of the trigger 6, Trigger 6 switches and from the output its signal is fed to the first input of the third element AND 8 and the indicator 7, which turns on. From the output of the third element And 8 signal is fed to the input of the relay protection 4.

Если релейна защита 4 находитс If relay protection 4 is

в исправном состо нии, то сигнал по вл етс на выходе ее выходного блока 3 и поступает на второй вход второго элемента И 14 и на механизм 5 переключени коммутационного аппарата . С выхода второго элемента И 14 через второй элемент ИЛИ 15 сигнал подаетс на К-вход триггера 6. Пос ледний переключаетс в исходное состо ние , в результате чего сигнал сin good condition, the signal appears at the output of its output unit 3 and is fed to the second input of the second element 14 and to the switching mechanism 5 of the switching device. From the output of the second element AND 14 through the second element OR 15, the signal is applied to the K input of the trigger 6. The last switches to the initial state, resulting in a signal from

его выхода исчезает, снимаетс сигнал с индикатора 7, с первого входа третьего элемента И 8 и, следовательно , со входа релейной защиты 4. Поскольку сигнал со входа релейнойits output disappears, the signal is removed from the indicator 7, from the first input of the third element I 8 and, consequently, from the input protection relay 4. Since the signal from the input relay

защиты 4 исчез, то она возвращаетс в исходное состо ние и выключатель защищаемого объекта не успевает отключитьс . При этом индикатор 7 включаетс кратковременно мигает наprotection 4 has disappeared, it returns to the initial state and the switch of the protected object does not have time to turn off. At the same time, the indicator 7 flashes briefly on

врем прохождени контрольного сигнала через релейную защиту.the time of passage of the control signal through the relay protection.

Claims

If the relay protection 4 is faulty, the signal does not appear at the output of its output unit 3, the RS flip-flop 6 is in the activated state and the indicator 7 remains on for a long time. Thus, according to the state of the indicator 7, the test outcome is fixed and the technical state of the relay protection is determined. In both cases, the device circuit returns to its original state after the control key 10 is set to the neutral position. When the relay protection A is triggered as a result of a short circuit on the protected object, the signal from its output goes to the switching device 5 switching device 5, causing the switch to turn off, to the second input of the second element I 14 and to the direct input of the first element I 12. Since at the inverse input of the first element AND 12 there is no signal, then a signal appears at its output, which through the first element OR 13 enters the S input of the trigger 6. The trigger 6 flips off, causing the indicator 7 to turn on, which signals the activation Ita. From the output of the RS flip-flop 6, the signal also arrives at the first input of the third element I 8. However, there is no signal at the second input of this element, as a result of which there is no signal at its output, i.e. the control device does not receive a signal to the input of relay protection 4 in this mode. After switching off the switches of the protected object, the relay protection returns to the initial state and does not prevent its reclosure. If during the current free pause the short circuit self-destructs, then the automatic reclosure is successful. In order to remove the signal about the operation of the relay protection 4 as a result of a short circuit on the protected object stored by the RS flip-flop 6, the second 16 contact of the control key 10 is closed. At the same time, from the source 9 of the pilot signal through the second element OR 15, the signal is fed to the R-code of the trigger 6. The latter switches to the initial state, the signal from its output disappears and the indicator 7 turns off. After returning the control key 10 to the neutral position, the circuit of the entire device returns to the initial state. Thus, in this device, the RS-flip-flop 6 and the indicator 7 carry information about the state of the relay protection during monitoring and perform the functions of a signal authority when the relay protection 4 operates as a result of a short circuit on the protected object, but in the latter case by introducing they do not interfere with AR in the circuit of the third element I 8, since the signal to the input of the relay protection 4 in this case is not given. Compared with the base object, which is considered as a device for signalization and control of relay protection, this device has a wider field of application, since the base object can be used only for the elements of the electrical system on equipped AR, and the proposed device is for all elements. Thanks to the fact that at present all power lines, busbars of power plants and substations, single-functioning transformers and other elements of the electrical system are equipped with AR, the possibilities of using the proposed device are greatly expanded. The invention The device for signaling and monitoring of relay protection, containing an input unit, the output of which through controlled relay protection is connected to the input of the switching device of the switching device, B.Strigger, the output of which is connected to the indicator, the first and second elements AND, the first element OR, the source of control the signal, the output of which is connected to the first input of the first element OR through the first input of the second contact of the control key with a neutral position, to the first input of the second element AND and the inverse input The house of the first element And, the second input of the first element And is connected to the second input of the second element And and connected to the connection point of the output controlled relay protection and switching mechanism of the switching apparatus, and the output of the first element AND is connected to the second input of the first OR element, the output of which is connected to S - to the trigger input, due to the fact that, in order to expand the field of application and increase the convenience of operation.

S1274023v

In addition, the third output is connected to the R-input of the trigger,

the AND element, the second OR element, and the second output of the third AND element are connected to the control key with the input of the controlled relay

lazy with a neutral position, protection, the first input of the third element is the source of the control signal and connected to the output of the RS flip-flop, through the second contact, the input is connected to the first input of the second contact of the control key from the neutron OR, the second the input of which by the immobile position - to the source, is dinene with the input of the second element AND, the control signal.