CN206533127U

CN206533127U - A kind of novel bus residual voltage holding meanss

Info

Publication number: CN206533127U
Application number: CN201720198846.XU
Authority: CN
Inventors: 张国勇
Original assignee: ANHUI EGRID ELECTRICAL EQUIPMENT Co Ltd
Current assignee: ANHUI EGRID ELECTRICAL EQUIPMENT Co Ltd
Priority date: 2017-03-02
Filing date: 2017-03-02
Publication date: 2017-09-29
Anticipated expiration: 2027-03-02

Abstract

The utility model is related to a kind of novel bus residual voltage holding meanss, reactor L, blast pontic FSR, the first high-speed eddy switch K0, current limliting damper RL and the second high-speed eddy switch K1 are protected including mother, the current limliting damper RL protects in parallel with blast pontic FSR after reactor L connects with mother, the first high-speed eddy switch K0 is connected in parallel on blast pontic FSR two ends, the end of incoming cables of the blast pontic FSR switchs the end of incoming cables of K1 connection devices, the leading-out terminal of the outlet terminating set of the blast pontic FSR by the second high-speed eddy.The utility model has the advantages that simple in construction, safe and reliable, action is fast, saves transformer investment and running wastage, can protect reactor 2ms inputs are female, fast more than reactor 15ms switchings speed is protected by breaker control mother in the market；Isolation short trouble can be cut off in time, the further expansion of short trouble scope is prevented, not decompression of the bus in feeder line branch, short-circuit failure is effectively ensured.

Description

A kind of novel bus residual voltage holding meanss

Technical field

The utility model is related to electrical system bus residual voltage and keeps technical field, and especially a kind of novel bus residual voltage is kept Device.

Background technology

With expanding economy, electricity consumption enterprise drastically increases, each branch road occur short trouble odds also with Increase severely, when short circuit occurs for a certain bar branch road under bus, drop is serious suddenly for the busbar voltage being connected with the branch road, the remaining voltage of bus Generally below the 20% of rated voltage, only when the branch breaker cut-offs, has cut off short trouble, busbar voltage could be recovered. There is this period that is recessed in busbar voltage, and Enterprise Power System is referred to as " shaking electricity ".During " shaking electricity " occurs, bus residual voltage is very It is low, make some that the load running of short trouble interruption not occur, such as frequency converter, motor, relay, magnetic valve can be to enterprises Industry production causes heavy losses.

, can be overall by area's Intranet when foreign network generation short trouble（All loads）Or part important load is switched to separately One foreign network, but certain branch road generation short circuit cannot integrally have switched in area's Intranet, can only partly switch.If weight in area's Intranet The sensitive loads wanted artificially have focused on a small number of branch roads or its circuitry number is originally few, and part switching is that can to solve area's Intranet short The problem of important load is stopped transport is caused on road, and necessary condition is that to have the suitable foreign network that can switch.If important in area's Intranet Sensitive loads branch road it is a lot, the cost of part switching is just too big, if changeable foreign network condition does not possess, then Solve area's Intranet and shake electric problem, be desirable scheme using bus residual voltage holding meanss.

Bus residual voltage holding meanss in the market are all that directly mother's guarantor's reactor and breaker are in parallel, by disconnected The division of road device is moved back come the throwing for controlling mother to protect reactor, because the intrinsic mechanical property of breaker is limited when a failure occurs it Mother protects the input speed of reactor.Further, since female protect when reactor is exited can not limit the dash current of its release, pole has can Female damage for protecting reactor can be caused, a trouble point is added.

Utility model content

The purpose of this utility model is to provide a kind of simple in construction, safe and reliable, action soon, can in time cut off and isolate short Road failure, prevents the further expansion of short trouble scope, and not decompression of the bus in feeder line branch, short-circuit failure is effectively ensured Novel bus residual voltage holding meanss.

To achieve the above object, the utility model employs following technical scheme：A kind of novel bus residual voltage holding meanss, Reactor L is protected including female, for quickly input mother to protect reactor L blast pontic FSR, for short trouble after system short-circuit Cut off backed off after random mother's guarantor's reactor L the first high-speed eddy switch K0, for exiting female guarantor reactor L and limiting female guarantor's reactor The current limliting damper RL of L discharge current, and for entering at short trouble after breaker excision failure failure to short trouble The second high-speed eddy switch K1, the current limliting damper RL of the secondary excision of row with it is female protect after reactor L connects with the pontic that explodes FSR is in parallel, and the first high-speed eddy switch K0 is connected in parallel on blast pontic FSR two ends, the end of incoming cables of the blast pontic FSR The end of incoming cables of K1 connection devices, the leading-out terminal of the outlet terminating set of the blast pontic FSR are switched by the second high-speed eddy.

The electric discharge damper RL is composed in parallel by resistance R and reactance L, the end of incoming cables of the electric discharge damper RL and blast Pontic FSR end of incoming cables is connected, and the leading-out terminal of the electric discharge damper RL is connected with female end of incoming cables for protecting reactor L, and mother protects electricity Anti- device L leading-out terminal is connected with the leading-out terminal of device.

The first high-speed eddy switch KO, the second high-speed eddy switch K1 are vacuum extinction breaker.

Female guarantor's reactor L, blast pontic FSR, the first high-speed eddy switch K0, current limliting damper RL and second are high Speed vortex switch K1 is installed in power distribution cabinet.

The first high-speed eddy switch KO, the second high-speed eddy switch K1 by the controller control in power distribution cabinet It is made to cut-off.

As shown from the above technical solution, the utility model has that simple in construction, safe and reliable, action is fast, save transformer Investment and the advantages of running wastage, can protect reactor 2ms inputs are female, electricity is protected more than breaker control mother is passed through in the market Anti- device 15ms switchings speed is fast；Isolation short trouble can be cut off in time, prevent the further expansion of short trouble scope, effectively Ensure not decompression of the bus in feeder line branch, short-circuit failure, can realize that female reactor of protecting is limited after short trouble excision to be released again The dash current put, plays a part of the female guarantor's reactor of protection.

Brief description of the drawings

Fig. 1 is electrical schematic diagram of the present utility model.

Embodiment

As shown in figure 1, a kind of novel bus residual voltage holding meanss, including mother protect reactor L, for fast after system short-circuit Speed input mother protects reactor L blast pontic FSR, backed off after random mother's guarantor's reactor L the first high speed whirlpool is cut off for short trouble Stream switchs K0, for exiting female current limliting damper RL, Yi Jiyong for protecting reactor L and limiting female discharge current for protecting reactor L K1, institute are switched in the second high-speed eddy for carrying out secondary excision after breaker excision failure failure at short trouble to short trouble State current limliting damper RL and protect in parallel with blast pontic FSR after reactor L connects with mother, the first high-speed eddy switch K0 is in parallel At blast pontic FSR two ends, the end of incoming cables of the blast pontic FSR switchs the inlet wire of K1 connection devices by the second high-speed eddy End, the leading-out terminal of the outlet terminating set of the blast pontic FSR.

As shown in figure 1, the electric discharge damper RL is composed in parallel by resistance R and reactance L, the electric discharge damper RL's enters Line end is connected with the end of incoming cables for the pontic FSR that explodes, leading-out terminal and the female end of incoming cables phase for protecting reactor L of the electric discharge damper RL Even, mother's guarantor's reactor L leading-out terminal is connected with the leading-out terminal of device.

As shown in figure 1, the first high-speed eddy switch KO, the second high-speed eddy switch K1 are vacuum extinction open circuit Device.Female reactor L, blast pontic FSR, first high-speed eddy of protecting switchs K0, current limliting damper RL and the second high speed whirlpool Stream switch K1 is installed in power distribution cabinet.First high-speed eddy switch KO, the second high-speed eddy switch K1 by installed in Controller in power distribution cabinet controls it to cut-off.

Operation principle of the present utility model is as follows：When controller detects short trouble, order blast pontic FSR exists Quickly disconnected in 2ms, mother is protected into reactor L puts into, protecting reactor L by mother is restricted to the short-circuit current of this feeder line The size of the rated current of this feeder line, so that effectively prevent bus from making whole piece bus loss of pressure because a branch road breaks down, Reduce the scope of short trouble；After mother protects reactor L inputs, fault branch short circuit current flow is substantially reduced, branch breaker energy Effectively cut off the short trouble of the branch road；When the branch breaker can not quickly cut off the short trouble of this branch road, controller Control the second high-speed eddy to switch K1 separating brakes immediately, whole piece branch road is isolated, the further expansion of short trouble is prevented.When After short trouble is cut off by this branch breaker, controller controls the first high-speed eddy switch K0 to close immediately, and mother is protected into reactance Device L carries out short circuit, prevents female reactor L that protects from putting into the actual motion for consuming a large amount of reactive loss and user terminal brownout for a long time Problem, while current limliting damper RL limitation mothers protect the dash current of reactor L releases, plays a part of the female guarantor's reactor L of protection.

Claims

1. a kind of novel bus residual voltage holding meanss, it is characterised in that：Reactor L is protected including mother, for fast after system short-circuit Speed input mother protects reactor L blast pontic FSR, backed off after random mother's guarantor's reactor L the first high speed whirlpool is cut off for short trouble Stream switchs K0, for exiting female current limliting damper RL, Yi Jiyong for protecting reactor L and limiting female discharge current for protecting reactor L K1, institute are switched in the second high-speed eddy for carrying out secondary excision after breaker excision failure failure at short trouble to short trouble State current limliting damper RL and protect in parallel with blast pontic FSR after reactor L connects with mother, the first high-speed eddy switch K0 is in parallel At blast pontic FSR two ends, the end of incoming cables of the blast pontic FSR switchs the inlet wire of K1 connection devices by the second high-speed eddy End, the leading-out terminal of the outlet terminating set of the blast pontic FSR.

2. novel bus residual voltage holding meanss according to claim 1, it is characterised in that：The electric discharge damper RL is by electricity Resistance R and reactance L is composed in parallel, and the end of incoming cables of the electric discharge damper RL is connected with the end of incoming cables for the pontic FSR that explodes, the electric discharge Damper RL leading-out terminal is connected with female end of incoming cables for protecting reactor L, and mother protects the leading-out terminal phase of reactor L leading-out terminal and device Even.

3. novel bus residual voltage holding meanss according to claim 1, it is characterised in that：The first high-speed eddy switch KO, the second high-speed eddy switch K1 are vacuum extinction breaker.

4. novel bus residual voltage holding meanss according to claim 1, it is characterised in that：Female guarantor's reactor L, blast Pontic FSR, the first high-speed eddy switch K0, current limliting damper RL and the second high-speed eddy switch K1 are installed in power distribution cabinet In.

5. novel bus residual voltage holding meanss according to claim 1, it is characterised in that：The first high-speed eddy switch KO, the second high-speed eddy switch K1 control it to cut-off by the controller in power distribution cabinet.