SU817852A2

SU817852A2 - Device for redundancy at failure of switches for bus-bars,connected in''bus-bars-autotransformer''circut,and linear connection with switches provided with output protection relau s from interphase and single-phase short-circuitings

Info

Publication number: SU817852A2
Application number: SU782682486A
Authority: SU
Inventors: Генрих Львович Эскин; Василий Петрович Алексеев
Priority date: 1978-11-09
Filing date: 1978-11-09
Publication date: 1981-03-30

Description

Изобретение относится к схемам защи ты электрических линий, машин и приборовThe invention relates to protection schemes for electric lines, machines and devices

По основному авт. св. № 655017 извест но устройство Для резервирования, содер жащее пусковые промежуточные реле, обмотки которых включены в цепь контроля пофазного отключения каждого из контролируемых выключателей последовательно с замыкающими контактами выходных реле защиты от однофазных коротких замыканий токовые реле, обмотки которых включены во .вторичные цепи соответствующих трансфор- ю маторов тока, реле времени, в цепь питания которого включены замыкающие контакты пусковых промежуточных реле, разделительные диоды и дополнительно введенные реле пофазного контроля тока и выходное! реле, при этом.замыкающие контакты выход⁴ного реле защиты от междуфазного корог кого замыкания через замыкающий контакт реле пофазного контроля тока, обмотки которого соединены последовательно с обмотками токовых реле, подключены через раз-, делительные диоды к обмоткам пусковых промежуточных реле, в цепь питания которых подключены замыкающие контакты токовых реле,· и через вновь введенные размыкающие контакты реле контроля положения выключателя—к обмоткам реле времени, замыкающий контакт которого включен последовательно с упомянутыми замыкающими контактами пусковых промежуточных реле в цепь питания обмотки выходного реле [1]. Известное устройство обеспечивает брльшую надежность в предотвращении ложного срабатывания при ошибочных действиях Обслуживающего персонала, однако не отключает поврежденный выключатель от се- ги.According to the main author. St. No. 655017, there is a known device for redundancy, containing starting intermediate relays, the windings of which are included in the phase-by-phase circuit of each of the monitored circuit breakers in series with the closing contacts of the output relays of protection against single-phase short circuits, current relays whose windings are included in the secondary circuits of the corresponding transformers of current matrices, a time relay, in the power supply circuit of which are included the closing contacts of the starting intermediate relays, isolation diodes and additionally entered relays Foot control and power output! relay, in this case, the closing contacts of the output of the ^4th relay of protection against interphase short circuit through the closing contact of the phase-by-phase current monitoring relay, the windings of which are connected in series with the windings of the current relays, are connected via the dividing diodes to the windings of the starting intermediate relays, to the power circuit of which the closing contacts of the current relays are connected, · and through the newly introduced opening contacts of the relay for monitoring the position of the switch, to the windings of the time relay, the closing contact of which is connected in series with closed contact contacts of the starting intermediate relays in the power circuit of the output relay winding [1]. The known device provides greater reliability in preventing false alarms due to erroneous actions of the Maintenance personnel, but does not disconnect the damaged circuit breaker from the mains.

Цель изобретения — повышение надежности путем автоматического отделения отказавшего выключателя и повторного включения выключателей, смежных с отказавшим. Поставленная цель достигается тем, что в устройство введены двухобмоточное реле пуска, сигнальное реле, реле времени отстройки, реле времени возврата, выходное промежуточное реле, выходное реле возврата и ограничительный резистор, причем замыкающие контакты выходного реле и выходного реле возврата включены, соответственно, в цепи первой и второй обмотки реле пуска, первый замыкающий контакт реле пуска включен последовательно с параллельноThe purpose of the invention is to increase reliability by automatically separating the failed switch and re-closing the switches adjacent to the failed. This goal is achieved by the fact that a two-winding start relay, a signal relay, a tune-away relay, a reset timer, an output intermediate relay, an output reset relay and a limiting resistor are introduced into the device, and the make contacts of the output relay and the output reset relay are connected, respectively, in the circuit the first and second winding of the start relay, the first make contact of the start relay is connected in series with parallel

Соединенными цепочками, одна из которых состоит из замыкающих контактов выходного реле и реле пофазного контроля тока, а также обмотки реле времени отстройки,а другая — из обмоток сигнального и выходного промежуточного реле и замыкающего контакта реле времени отстройки, второй замыкающий контакт реле пуска включен последовательно с обмоткой реле времени возврата и тремя параллельными цепочками, две из которых состоят из последовательно соединенных пофазных блок-контактов разъединителей, а третья — из последовательно соединенных пофазных блок-контактов выключателя, обмотка выходного реле возврата зашунтирована замыкающим контактом реле времени возврата и включена последовательно с ограничительным резистором и параллельно соединенными замыкающими контактами реле времени возврата и выходного реле возврата; кроме того, три замыкающих контакта реле пуска включены в цепи вывода автоматического повторного включения (АГ1В) выключателей, смежных с отказавшим, два замыкающих контакта выходного промежуточного реле включены в цепи питания блокирующих замкой разъединителей, замыкающий контакт реле пуска подключен к двум замыкающим контактам выходного промежуточного реле, объединенным одним полюсом и включенным в цепи отключения разъединителей, а в каждой цепи ввода автоматического повторного включения выключателей, смежных с отказавшим, включены последовательно соединенные замыкающий контакт выходного промежуточного реле и размыкающий контакт реле пуска.Connected chains, one of which consists of the closing contacts of the output relay and the phase-by-phase current monitoring relay, as well as the windings of the tune-away relay, and the other of the windings of the signal and output intermediate relays and the closing contact of the tune-away relay, the second closing contact of the start relay is connected in series with winding of the return time relay and three parallel chains, two of which consist of series-connected phase-by-phase block-contacts of disconnectors, and the third - of series-connected of the main block contacts of the circuit breaker, the winding of the output reset relay is shunted by the make contact of the reset time relay and is connected in series with the limiting resistor and the make contact of the reset time relay and output reset relay in parallel; in addition, three make contacts of the start relay are included in the output circuit of the automatic restart (AG1V) circuit breakers adjacent to the failed one, two make contacts of the output intermediate relay are connected to the power supply circuit of the lock-disconnecting switches, the make contact of the start relay is connected to two make contacts of the output intermediate relay connected by one pole and included in the disconnecting circuit of the disconnectors, and in each input circuit of the automatic restarting of the switches adjacent to the failed circuit breaker, are the serially connected make contact of the output intermediate relay and the make contact of the start relay.

На фиг. 1 изображена схема подстанции с двумя выключателями на присоединение; на фиг. 2 — схема цепи постоянного тока устройства; на фиг. 3 — схема цепи вывода АПВ выключателей, смежных с отказавшим; на фиг. 4 — схема цепи питания блокирующих замков разъединителей отказавшего выключателя; на фиг. 5 — схема цепи отключения разъединителей, примыкающих к отказавшему выключателю; на фиг. 6 — схема цепи ввода АПВ выключателей, смежных с отказавшим.In FIG. 1 shows a diagram of a substation with two switches for connection; in FIG. 2 is a diagram of a DC circuit of a device; in FIG. 3 - diagram of the output circuit of automatic reclosure of switches adjacent to the failed; in FIG. 4 is a diagram of the power circuit of the locking locks of the disconnectors of the failed switch; in FIG. 5 is a circuit diagram of the disconnector disconnecting circuit adjacent to a failed switch; in FIG. 6 is a diagram of the input circuit of the automatic reclosure of switches adjacent to the failed one.

Схемы содержат отказавший выключатель 1, примыкающие к нему разъедините-! ли 2 и 3, замыкающий контакт 4 выходного реле, реле 5 пуска (например,двухпозици- > о.нное реле типа РП—8), его контакты 6—14, размыкающие контакты .15 и 16 выходного реле и реле пофазного контроля тока в отказавшем выключателе, реле 17 времени отстройки и его контакт 18, сигнальное реле 19, выходное промежуточное реле 20 и его кон- такты 21-—24, блок-контакты 25—30 разъединителей 2 и 3, блок-контакты 31—33 отказавшего выключателя 1, реле 34 времени возврата и его контакты 35 и 36, выходное ' 4 реле 37 возврата и его контакты 38—42 и резистор 43. Возможно включение контакта 44 реле 37.The circuits contain a failed switch 1, disconnect adjacent to it-! whether 2 and 3, make contact 4 of the output relay, start relay 5 (for example, two-position> on-line relay of the RP-8 type), its contacts 6-14, the open contacts .15 and 16 of the output relay and phase-by-phase current monitoring relay in a failed switch, a tune-away relay 17 and its contact 18, a signal relay 19, an output intermediate relay 20 and its contacts 21--24, block contacts 25-30 of disconnectors 2 and 3, block contacts 31-33 of a failed switch 1 , return time relay 34 and its contacts 35 and 36, output '4 return relay 37 and its contacts 38–42 and resistor 43. It is possible to turn on the contact 44 relays 37.

Обмотки выходного реле и реле пофазного контроля тока на схемах не показаны.The windings of the output relay and phase-by-phase current monitoring relays are not shown in the diagrams.

Устройство работает следующим образом.The device operates as follows.

При срабатывании выходного реле с выявлением отказавшего выключателя 1 с прилегающими к нему разъединителями 2 и 3 подается команда на отключение отказавшего и примыкающих к нему выключателей, а также замыкающим контактом 4 — на срабатывание двухпозиционного реле 5 пуска, которое своими замыкающими контактами 6—8 выводит устройстйа АНВ выключателей, смежных с отказавшим выключателем l_v Через замыкающий контакт 9 реле 5, размыкающие контакты 15 и 16 соответственно выходного реле и реле пофазного контроля тока в отказавшем выключателе подготавливают Цепь срабатывания реле 17 времени отстройки. Катушка реле 17 срабатывает после возврата выходного реле (замыкания размыкающего контакта 15) и реле пофазного контроля тока в цепи отказавшего выключателя (замыкания размыкающего -контакта 16). Выдержка реле 17 времени отстройки принимается больше времени действия резервных защит (порядка 3—4 с).When the output relay is triggered with the identification of the failed switch 1 with the adjacent disconnectors 2 and 3, a command is issued to disconnect the failed and adjacent switches, as well as the make contact 4 - to operate the on-off start relay 5, which outputs the device with its make contacts 6-8 AHB breakers adjacent to the failed circuit breaker l _v 9 Through normally open contact switch 5, the break contacts 15 and 16 respectively output relays and per phase current control in the failed switch Prepare pour relay actuation circuit 17, detuning time. The relay coil 17 is activated after the output relay returns (closure of the normally open contact 15) and the phase-by-phase current monitoring relay in the circuit of the failed switch (closure of the normally open contact 16). The shutter speed relay 17 off time is taken longer than the backup protection (about 3-4 s).

Реле 17 времени отстройки своим замыкающим контактом 18 через сигнальное реле 19 подготавливает цепь срабатывания катушки выходного промежуточного реле 20. Замыкающие контакты 21 и 22 реле 20 подают питание на катушки блокирующих замков разъединителей 2 и 3, а 'замыкающие контакты 23 и 24 этого же реле через замыкающий контакт 10 реле 5 пуска подают команду на отключение разъединителей 2 и 3, включенных в цепь отказавшего выключателя 1.The tune-away relay 17, with its make contact 18 through the signal relay 19, prepares the actuation circuit of the output intermediate relay coil 20. The make contacts 21 and 22 of the relay 20 supply power to the coils of the locking locks of the disconnectors 2 and 3, and the make contacts 23 and 24 of the same relay through the make contact 10 of the start relay 5 gives a command to disconnect the disconnectors 2 and 3 included in the circuit of the failed switch 1.

При отключении разъединителей 2 и 3 в цепи отказавшего выключателя 1 и по положению их блок-контактов 25—30 или по положению блок-контактов 31—33 отказавшего выключателя, который может отключиться от выходного реле, через замыкающий контакт 11 реле 5 пуска подается питание на катушку реле 34 времени возврата. При срабатывании этого реле с выдержкой времени порядка 0,3—0,5 с его проскальзывающим контактом 35 подается питание на обмотку выходного реле 37 возврата, которое самоудерживается контактом 38 до шунтирования его Обмотки упорным контактом 36 реле 34 времени возврата. Выдержка времени упорного контакта 36 выбирается порядка 1 с.When disconnectors 2 and 3 are disconnected in the circuit of the failed switch 1 and by the position of their block contacts 25–30 or by the position of the block contacts 31–33 of the failed switch, which can be disconnected from the output relay, the power is supplied through the make contact 11 of the start relay 5 coil coil 34 return time. When this relay is activated with a time delay of the order of 0.3-0.5 with its slipping contact 35, power is supplied to the winding of the output return relay 37, which is self-holding by contact 38 until the winding is bypassed with the contact 36 of the return time relay 34. The exposure time of the contact 36 is selected on the order of 1 s.

Замыкающий контакт 39 реле 37 возвращает реле 5 пуска в исходное положение.The make contact 39 of the relay 37 returns the start relay 5 to its original position.

Другие замыкающие контакты 40—42 реле .37 и размыкающие контакты 12—14 реле 5 пуска подают импульсы на ввод устройствOther NO contacts 40–42 of relay .37 and NC contacts 12–14 of start relay 5 provide pulses to input devices

All В выключателей, смежных с отказавшим. Резистор 43 в цепи реле 37 служит для предотвращения короткого замыкания в момент шунтирования реле 37 контактом 36 реле 34 времени возврата.All in circuit breakers adjacent to the failed. The resistor 43 in the relay circuit 37 serves to prevent a short circuit at the time of shunting the relay 37 by the contact 36 of the reset time relay 34.

Применение предлагаемого устройства 5 позволяет отделить отказавший выключа-. тель.и восстановить в работе выключатели, смежные с отказавшим, что в значительной степени увеличивает надежность работы подстанции и примыкающей сети и дает возможность получения значительного экономичес- ¹⁰кого эффекта за счет быстрого восстановления электроснабжения отключенных потребителей, связанных с работой устройства резервирования отказа выключателей.The application of the proposed device 5 allows you to separate the failed off. tel.i restore the circuit breakers adjacent to the failed, which greatly increases the reliability of the substation and the adjacent network and makes it possible to obtain a significant effect ekonomiches- ¹⁰ who due to the rapid recovery of power supply disconnected consumers related to work backup device failure switches.

Claims

connected tsopochkami. one of which consists of the closing contacts of the output relay and the phase-current control relay, as well as the winding of the detuning time relay, and the other from the windings of the signal and output intermediate relay and the closing contact of the detuning time relay, is connected in series with the winding of the time relay return and three parallel chains, two of which consist of series-connected -physical block-contacts disconnectors, and a third - of a series-connected phase-block block-contacts yklyuchatel, winding shunted return output relay closing contact relays and reset time is connected in series with a limiting resistor connected in parallel and normally open relay contacts return time and return the output relay; in addition, three closing contacts of the start relay are included in the output circuit of the automatic switching on (AR) switches adjacent to the failing one, two closing contacts of the output intermediate relay are included in the power supply circuit of the lock-closing disconnectors, for the closing contact of the start relay is connected to the two closing contacts of the output relay an intermediate relay, united by one pole and included in the circuit of disconnectors, and in each circuit of the input of automatic reclosing of the switches adjacent to the failing one, There are series-connected make contact of the output intermediate relay and a break contact of the start relay. FIG. Figure 1 shows a substation scheme with two switches for connection; in fig. 2 is a schematic of the DC circuit of the device; in fig. 3 - circuit diagram of the output of the automatic reclosing circuit breakers adjacent to the failed; in fig. 4 is a power supply circuit diagram of the locking locks of the disconnecting switches of the failing switch; in fig. 5 is a circuit diagram of the disconnectors disconnecting circuit adjacent to the failing switch; in fig. 6 is a schematic of the input circuit of the automatic reclosing circuit breakers adjacent to the failing circuit. The circuits contain the failing switch 1, disconnecting it between the closures: whether 2 and 3, the closing contact 4 of the output relay, the starting relay 5 (for example, the RP-8 two-position relay), its contacts 6-14, the opening contacts .15 and 16 output relay and a single-phase current control relay in a failing switch, a detuning time relay 17 and its contact 18, a signal relay 19, an output intermediate relay 20 and its contacts 21-24, block contacts 25-30 of disconnectors 2 and 3, block contacts 31--33 failing switch 1, relay 34 for return time and its contacts 35 and 36, output relay 37 for star and its contacts 38-42 and resistor 43. It is possible to turn on the contact 44 of the relay 37. The windings of the output relay and the phase-by-current control relay are not shown in the diagrams. The device works as follows. When the output relay is triggered to detect a failing switch 1 with disconnectors 2 n 3 adjacent to it, the command is given to turn off the failing switches and adjacent switches, as well as the closing contact 4, to trigger the two-position start relay 5, which has 6-8 contact loops outputs the A1SH switches adjacent to the failed switch 1. Through the closing contact 9 of the relay 5, the opening contacts 15 and 16 respectively of the output relay and the relay control current in the failed switch pushes the fierib response of the detuning time relay 17. The coil of the relay 17 is activated after the return of the output relay (closing contact 15) and the phase-by-current control relay in the circuit of the failed switch (closing opening contact-16). A delay of the detuning time relay 17 takes longer than the duration of the backup protection (on the order of 3-4 s). The detuning time relay 17 by its closing contact 18 through the signal relay 19 prepares the tripping circuit of the output intermediate relay 20. The closing contacts 21 and 22 of the relay 20 supply power to the coils of the b-locking locks of the disconnectors 2 and 3, and the closing contacts 23 and 24 of the same relay through the closing contact 10 of the start-up relay 5, a command is issued to disconnect the disconnectors 2 and 3 connected in the circuit of the failed switch 1. When disconnecting the disconnectors 2 and 3 in the circuit of the failed switch 1 and according to the position of their 25–30 contacts or across the floor The blocking contacts 31-33 of the failed switch, which may be disconnected from the output relay, will come through the closing contact 1I of the relay of the accelerator, and power is supplied to the coil of the return time relay 34. When this relay is triggered, with a time delay of about 0.3-0.5, with its slipping contact 35, the coil of the return output relay 37 is energized, which is held by contact 38 until its winding is protected by the contact contact 36 of the return time relay 34. The time delay of the thrust contact 36 is selected on the order of 1 s. .Clock contact 39 relay 37 returns the start 5 relay to its original position. Other closing contacts 40-42 of the relay 37 and opening contacts 12-14 of the start-up relay 5 give impulses to the input of the automatic reclosing devices of the switches adjacent to the failed ones. A resistor 43 in the circuit of the relay 37 serves to prevent a short circuit at the moment of the relay 37 is bridged by the contact 36 of the relay 34 of the return time. The application of the proposed device allows the separation of the failed switch-off. The operation of the switches and the restoring switches adjacent to the failed ones greatly increases the reliability of the operation of the substation and the adjacent network and makes it possible to achieve a significant economic effect due to the rapid restoration of the power supply to the disconnected consumers associated with the operation of the fail-safe switch backup device. Claims of the Invention A redundant device in case of failure of switches for women connected according to the “wired-autotransformer” scheme. and linear connection with switches, equipped with protection blocks with output relays of protection against phase-to-phase and single-phase short circuit; on auth. sa No. 655017, characterized in that, in order to increase reliability by automatically separating the failing switch and re-activating the switches adjacent to the failed one, a dual-winding start relay, a signal relay, a tune-out relay, a return time relay, an output intermediate relay, an output relay are introduced into it. return and limiting resistor, with the closing contacts of the output relay and the output relay returning, respectively, in the circuit of the first and second winding of the start relay, the first closing contact of the start relay in It is connected in series with parallel-connected Chains, one of which consists of the closing contacts of the output relay and the pephasal current control relay, as well as the winding rela ted “detuning time, and the other from the windings of the signal and output intermediate relay and the closing contact of the detuning time relay, the second shorting the start relay contact is connected in series with the winding of the return time relay and three parallel chains, two of which consist of phase-disconnectors that are connected in series, and three These are: from series-connected, single-phase block-breaker contacts, the winding of the output of which the return relay is shunted by the closing contact of the return time relay and connected in series with the limiting resistor and in parallel connected. Nish.N closing contacts pejf5 return time and output, the relay return; In addition, three closing contacts of the start relay are located in the output circuit of the automatic restart of the switches adjacent to the failed one, two closing contacts of the output intermediate relay are included in the power supply circuit of the blocking locks of the disconnectors, the closing contact of the reset switch is connected to two closing contacts of the output intermediate a relay, connected by one pole and turned on, in the circuit of disconnectors, and in each circuit of the input of automatic reclosing of the switches adjacent to the failed ones, serially connected make contact of the output intermediate relay and disconnecting contact of the start relay. Sources of information taken into account in the examination of I. USSR author's certificate No. 665017, cl. H 02 H 11/00, 01.10.74.

7

eight

Fig.Z