CN202205639U - Interlocking device for high voltage distribution equipment - Google Patents

Abstract

The utility model discloses an interlocking device for high voltage distribution equipment, which is mainly used for preventing false operation of 10KV feed line circuit distribution equipment. The interlocking device is composed of five isolation switches, two high voltage circuit breakers and an intermediate relay; in the 10KV feed line circuit distribution equipment, two isolation switches are mounted among inner and outer buses on the 10KV feed line power supply side and the high voltage circuit breakers, and one isolation switch is mounted on the circuit side and is connected with a direct object of a power supply; and the intermediate relay is connected in series with auxiliary normally opened contact points of the high voltage circuit breakers by being connected with other two isolation switches and the buses, and is mounted between positive and negative electrodes of a direct current control power supply. The interlocking device for the high voltage distribution equipment can prevent operators from carelessly opening the switches with charges or closing the knife switches with charges (namely, the isolation knife switches are wrongly opened or closed when the switch cabinet circuit breaker is at closing position), so that the above accident can be effectively prevented.

Description

A kind of high-tension distribution equipment interlock

Technical field

The utility model belongs to the power system security protective equipment, is mainly used in to prevent the misoperation of 10KV feeder line controller switching equipment, is specifically related to a kind of high-tension distribution equipment interlock.

Background technology

At present, the employed incorrect operation preventing interlocking apparatus of high-tension distribution equipment is divided into two kinds on mechanical interlocking and digital logic lock basically.The mechanical chain anti-misoperation apparatus is applicable to that all become the distribution operation control assembly and are positioned at the closely control (interlocking) with a power distribution cabinet; Realize the fool proof function of remote interlocking though digital logic lock anti-misoperation apparatus has, digital logic lock construction more complicated, highly professional often owing to safeguard not in place or improper use, causes its useful life all shorter relatively.

Summary of the invention

The utility model aims to provide has remote interlocking anti-misoperation function and a kind of high-tension distribution equipment interlock simple in structure.

The utility model is by 5 isolating switch DS1, DS2, DS3, DS11, DS22; 2 primary cut-out DL, DL0; 1 auxiliary relay constitutes, and in 10KV feeder line power distribution equipment, isolating switch DS1, DS2 are installed between inside and outside bus of 10KV feeder line mains side and the primary cut-out DL; Isolating switch DS3 is installed on the line side, is connected with the direct object of supply of electric power; 2 bus contact isolating switch DS11, DS22 are arranged in described 5 isolating switches, 1 bus contact primary cut-out DL0 is arranged in 2 primary cut-outs;

Installation site and the annexation of bus contact isolating switch DS11, DS22 and bus contact primary cut-out DL0 are:------bus is got in touch with the outer female bus of primary cut-out DL0---isolating switch DS22---power supply to isolating switch DS11 to bus in the power supply; Auxiliary relay K1 is installed between the both positive and negative polarity of DC control supply through connecting with isolating switch DS11, DS22 and the auxiliary normally opened contact of bus contact primary cut-out.

Described isolating switch is the disconnection switch of charged magnetic lock device.

The utility model can prevent that the operation personnel are for the moment off one's guard, and on-load drag switch, bringing onto load close disconnecting link (be switch cubicle circuit breaker when closing position, mistake draws mistake to close isolation switch), prevent that effectively above-mentioned accident from taking place.

Description of drawings:

Fig. 1 is the line map of the utility model embodiment.

Fig. 2 send electric operation logic block diagram among the utility model embodiment.

Fig. 3 is inside and outside bus and the operation logic block diagram of power supply of falling among the utility model embodiment.

Among the figure; DS1, DS2, DS3---circuit disconnection switch auxiliary contact, DS11, DS22---bus contact isolating switch auxiliary contact, DL---circuit primary cut-out auxiliary contact; DL0---bus contact primary cut-out auxiliary contact, K1---the chain auxiliary relay of female couplet-circuit.

Embodiment:

Embodiment: Fig. 1, Fig. 2, shown in Figure 3; The utility model is by 5 isolating switch DS1, DS2, DS3, DS11, DS22,2 primary cut-out DL, DL0, and 1 auxiliary relay constitutes; In 10KV feeder line power distribution equipment; Isolating switch DS1, DS2 are installed between inside and outside bus of 10KV feeder line mains side and the primary cut-out DL, and isolating switch DS3 is installed on the line side, is connected with the direct object of supply of electric power.

Through the opening and closing of disconnecting switch operation DS1 (or DS2), determined female in the power supply (or outer female) supply of electric power situation to the 10KV feeder line; Through operation that line side isolating switch DS3 is closed, the feasible pairing supply of electric power object of DS3 is supplied power becomes possibility; After isolating switch DS1 (or DS2), the equal closure of DS3; Through operation primary cut-out DL is closed a floodgate; The high-tension electricity supply chain of 10KV has just formed like this: the 10KV high-tension current is by female in the mains side (or outer female); Through isolating switch DS1 (or DS2), primary cut-out DL, line side isolating switch DS3, arrival meets power circuit.When normal power supply, isolating switch DS1, DS2 generally do not allow to be in simultaneously closing position---except female power supply also falls to operate inside and outside also falling.

2 bus contact isolating switch DS11, DS22 are arranged in described 5 isolating switches, 1 bus contact primary cut-out DL0 is arranged in 2 primary cut-outs.

Installation site and the annexation of bus contact isolating switch DS11, DS22 and bus contact primary cut-out DL0 are:------bus is got in touch with the outer female bus of primary cut-out DL0---isolating switch DS22---power supply to isolating switch DS11 to bus in the power supply; And fall inside and outside during the operation of female power supply; After must earlier isolating switch DS11, DS22 being closed; Could operate bus contact primary cut-out DL0, make its combined floodgate, form actual inside and outside bus power supply " homology ".Auxiliary relay K1 is through connecting with isolating switch DS11, DS22 and the auxiliary normally opened contact of bus contact primary cut-out; Be installed between the both positive and negative polarity of DC control supply; To reach after isolating switch DS11, DS22 and bus contact primary cut-out have all closed a floodgate, repeat circuit K1 can get electronic work, thereby is in the 10KV feeder line power distribution equipment; The combined floodgate of isolating switch DS2 (or DS1), the operation of operating a switch provide unlocking condition, belong to an interlocking relay.

The control principle of present embodiment is:

Logic guarantee when 1, sending the electricity operation: under system's static state; No matter be disconnecting link DS1; Or disconnecting link DS2 all can form from the control positive source, and---------normally-closed contact of disconnecting link DS2 or DS1---electromagnetic lock of disconnecting link DS1 or DS2---is got back to the control power cathode to disconnecting link DS3 normally-closed contact to the DL1 normally-closed contact, forms the closed path of electric current; Make disconnecting link DS1, DS2 electromagnetic lock unlock, can arbitrarily operate disconnecting link DS1, DS2.And through disconnecting link DS3 electric current because will be through the parallelly connected normally opened contact of DS1 and DS2, therefore, have only (outer female disconnecting link) DS2 or (interior female disconnecting link) DS1 one of which place closed after, just can carry out operational load side tool lock DS3, make its combined floodgate.Disconnecting link DS3 is once closing operation, because its normally-closed contact DS3 is opened, therefore the operating position of disconnecting link DS1, DS2 is locked at this moment, under the situation of not release, must not carry out the operation of divide-shut brake.At this moment, just can carry out the operate high pressure switch, make its combined floodgate, accomplish and send electric operating process.Thereby having guaranteed that each disconnecting link correctly closes a floodgate send electric operating sequence.The operating sequence that its separating brake has a power failure in contrast, the logical relation of control loop electromagnetic lock action is also in contrast

2, inside and outside mother and the operation of power supply:

The operating state of current power supply unit is: interior bus---DS1 disconnecting link---DL switch---DS3 disconnecting link---supply line.Operation task: need the power supply of this supply line be changed into by outer bus and supplying power, then it operated appellation: inside and outside female couplet disconnecting link DS11, DS22 are closed, simultaneously; Inside and outside female interconnection switch DL0 is closed; Then control female power supply---DS11---DL0 that forms following loop :+KM (because DL0 is closed, so junction closure) K1---DS22---KM, therefore; Relay K 1 gets electronic work (closure), and promptly its normal opened contact K1 is closed.While is owing to the DL switch closure, so the normal opened contact DL of DL is closed; The DS1 disconnecting link is in closure state, so its auxiliary contact DS1 is in closure state, promptly+---------the closed path loop of DS1---DS2 disconnecting link electromagnetic lock---KM forms K1 DL KM, and at this moment, DS2 disconnecting link electromagnetic lock gets the electrolysis lock and can operate.The DS2 disconnecting link closes; Draw back the DS1 disconnecting link (because DS2 closes a floodgate; Therefore DS1 has possessed release, separating brake condition); The power supply of this supply line and the process of falling have so just been accomplished,---DS2 disconnecting link---DL switch---DS3 disconnecting link---supply line that the operating state of this distribution unit become: outer bus.At last DS11, DS22, DL0 are recovered stand-by state.

More than analyzed and carried out that circuit stops sending electricity operation, inside and outside female power supply and when operating; The operation principle of logic control circuit; Therefrom can find out, no matter which kind of operation, this control circuit slave unit hardware facility aspect has well prevented the generation of operating personnel's misoperation incident.Thus, can find out that this logic control circuit has satisfied the general requirement of operation of power supplying and distributing equipment, has guaranteed:

When (1) sending electricity, close earlier mains side disconnecting link (DS1 or DS2), after close load side disconnecting link (DS3), the basic work requirement of line switching equipment (circuit breaker) that close at last.

When (2) having a power failure, first open-circuit line switchgear (circuit breaker), again draw back load side disconnecting link (DS3), draw back the basic work requirement of mains side disconnecting link (DS1 or DS2) at last.

(3) for inside and outside bus power supply and switch-down process; Must guarantee after bus contact loop is according to correct order contact (that is: each device for switching DS11-DS22-DL0 all be in, in "on" position); Just can operate closed disconnecting link DS2 (or DS1) as required, thus inside and outside making the switching between female power supply and operate in permission among carry out.

In general, send the normal running of electricity operation to be in proper order:

(1) power turn-on side isolation switch (interior female disconnecting link DS1 or outer female disconnecting link DS2);

(2) the load side disconnecting link DS3 that closes;

(3) the high-voltage switch gear DL that closes;

Send the electricity operation through above i.e. completion of three steps, the power failure operating sequence in contrast.

Inside and outside normal running female and power supply is in proper order:

(1) the inside and outside bus contact disconnecting link (DS11 and DS22) that closes respectively;

(2) the inside and outside bus contact high-voltage switch gear DL0 that closes;

(3) close as required in female disconnecting link DS1, break off outer female disconnecting link DS2 (specifically looking operation needs and decide for or the outer female disconnecting link DS2 that closes, female disconnecting link DS1 in the disconnection):

(4) inside and outside bus contact high-pressure installation (contact disconnecting link DS11, DS22, high-voltage switch gear DL0) is returned to stand-by state;

Go on foot the inside and outside female and operation of power supply of i.e. completion through above four.

Claims (2)

1. a high-tension distribution equipment interlock is characterized in that ItBy 5 isolating switch DS1, DS2, DS3, DS11, DS22; 2 primary cut-out DL, DL0; 1 auxiliary relay constitutes, and in 10KV feeder line power distribution equipment, isolating switch DS1, DS2 are installed between inside and outside bus of 10KV feeder line mains side and the primary cut-out DL; Isolating switch DS3 is installed on the line side, is connected with the direct object of supply of electric power; 2 bus contact isolating switch DS11, DS22 are arranged in described 5 isolating switches, 1 bus contact primary cut-out DL0 is arranged in 2 primary cut-outs;

Installation site and the annexation of bus contact isolating switch DS11, DS22 and bus contact primary cut-out DL0 are:------bus is got in touch with the outer female bus of primary cut-out DL0---isolating switch DS22---power supply to isolating switch DS11 to bus in the power supply; Auxiliary relay K1 is installed between the both positive and negative polarity of DC control supply through connecting with isolating switch DS11, DS22 and the auxiliary normally opened contact of bus contact primary cut-out.

2. a kind of high-tension distribution equipment interlock according to claim 1 is characterized in that described isolating switch is the disconnection switch of charged magnetic lock device.

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