CN206533128U

CN206533128U - Self-shield bus residual voltage holding meanss based on Fast Switch with Large Capacity FSR

Info

Publication number: CN206533128U
Application number: CN201720198862.9U
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 self-shield bus residual voltage holding meanss based on Fast Switch with Large Capacity FSR, including female reactor L, Fast Switch with Large Capacity FSR, the first high-speed eddy of protecting switchs K0, electric discharge damper RL, high energy type fuse FU；High energy type fuse FU protects reactor L with mother and connected, the two switchs K0 and electric discharge damper RL, Fast Switch with Large Capacity FSR parallel connections with the first high-speed eddy after connecting respectively after connecting, the end of incoming cables of a second high-speed eddy switch K1 terminating set, another termination high energy type fuse FU end of incoming cables.The utility model has the advantages that simple in construction, safe and reliable, action is fast no-delay, can be in the female guarantor's reactor L of 0.15ms inputs, isolation short trouble can be cut off in time, prevent the further expansion of short trouble scope, not decompression of the bus in feeder line branch, short-circuit failure is effectively ensured, can realize that short trouble excision stepmother protects zero loss of reactor again.

Description

Self-shield bus residual voltage holding meanss based on Fast Switch with Large Capacity FSR

Technical field

The utility model is related to electrical system bus residual voltage and keeps technical field, and especially one kind is opened based on high-capacity and high-speed Close FSR self-shield bus residual voltage holding meanss.

Background technology

With expanding economy, the sharp increase of business electrical load, power network median generatrix institute band branch road is more and more, works as mother Short circuit occurs for a certain bar branch road under line, and drop is serious suddenly for the busbar voltage being connected with the branch road, and the remaining voltage of bus is generally below The 20% of rated voltage, only when the branch breaker cut-offs, has cut off short trouble, busbar voltage could be recovered.Busbar voltage There is this period that is recessed, Enterprise Power System is referred to as " shaking electricity ".During " shaking electricity " occurs, bus residual voltage is very low, makes one A little load runnings that short trouble does not occur are interrupted, such as frequency converter, motor, relay, magnetic valve.These are anti-to " shaking electricity " Referred to as sensitive loads should be significantly loaded, mechanical movement is characterized in and has the presence of electric energy or magnetic energy energy-storage travelling wave tube. When usual bus residual voltage is below 50%, sensitive loads tolerable " shaking electricity " time is not more than 30ms.

When short trouble occurs for foreign network, the overall whole loads of area's Intranet or part important load can be 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.

The bus residual voltage holding meanss that existing market is used all are the inputs that reactor is protected by High-speed on-off control mother, just Often during operation, speed-sensitive switch short circuit mother protects reactor, and when short trouble occurs for branch road, mother is protected reactance by speed-sensitive switch separating brake Device is concatenated into circuit, occurs to speed-sensitive switch separating brake to need 18ms from short trouble, short trouble is possible to be expanded to bus Side, will cause larger range of Power System Shortcuts.

Utility model content

The purpose of this utility model is to provide a kind of simple in construction, safe and reliable, acts soon, isolation can be cut off in time short Road failure, prevents the further expansion of short trouble scope, and bus not decompression in feeder line branch, short-circuit failure is effectively ensured Self-shield bus residual voltage holding meanss based on Fast Switch with Large Capacity FSR.

To achieve the above object, the utility model employs following technical scheme：One kind is based on Fast Switch with Large Capacity FSR Self-shield bus residual voltage holding meanss, including female protect reactor L, protect reactor L's for quick input to be female after system short-circuit Fast Switch with Large Capacity FSR, the first high-speed eddy for protecting reactor L for short trouble excision backed off after random mother switch K0, are used for The electric discharge damper RL of the female discharge impact electric current for protecting reactor L of limitation, for preventing female reactor L that protects because of long-time input The high energy type fuse FU being damaged and the second high-speed eddy switch K1；The high energy type fuse FU goes here and there with female reactor L that protects Connection, K0 and electric discharge damper RL, Fast Switch with Large Capacity FSR are switched after the two series connection with the first high-speed eddy after connecting respectively Parallel connection, the end of incoming cables of a second high-speed eddy switch K1 terminating set, another termination high energy type fuse FU end of incoming cables.

The electric discharge damper RL is composed in parallel by inductance L and resistance R, one end of the electric discharge damper RL and first high Speed vortex switch K0 leading-out terminal is connected, and the other end is connected with female leading-out terminal for protecting reactor L.

The first high-speed eddy switch K0, the second high-speed eddy switch K1 are vacuum interrupter arc extinguishing breaker.

Female reactor L, Fast Switch with Large Capacity FSR, first high-speed eddy of protecting switchs K0, electric discharge damper RL, height Energy type fuse FU and the second high-speed eddy switch K1 are installed in power distribution cabinet.

The Fast Switch with Large Capacity FSR, the first high-speed eddy switch K0, the second high-speed eddy switch K1 are by installing Controller in power distribution cabinet controls it to cut-off.

As shown from the above technical solution, the utility model has that simple in construction, safe and reliable, action is fast, it is no-delay to act The advantages of, can be in the female guarantor reactor L of 0.15ms inputs, more than the throwing for passing through breaker control mother's guarantor's reactor L in the market Cutting speed degree is fast, and isolation short trouble can be cut off in time, the further expansion of short trouble scope is prevented, bus is effectively ensured and exists Not decompression during feeder line branch, short-circuit failure, can realize that short trouble excision stepmother protects zero loss of reactor again.

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 self-shield bus residual voltage holding meanss based on Fast Switch with Large Capacity FSR, including female guarantor Reactor L, for the female Fast Switch with Large Capacity FSR for protecting reactor L of quick input after system short-circuit, for short trouble excision Backed off after random mother protects reactor L the first high-speed eddy switch K0, the electric discharge for limiting female discharge impact electric current for protecting reactor L Damper RL, the high speeds of high energy type fuse FU and second for preventing female guarantor reactor L to be damaged because long-time is put into Vortex switch K1；The high energy type fuse FU with mother protect reactor L connect, the two series connection after respectively with connect after first high speed Vortex switch K0 and electric discharge damper RL, Fast Switch with Large Capacity FSR are in parallel, and the second high-speed eddy switchs a K1 terminating set End of incoming cables, another termination high energy type fuse FU end of incoming cables.The leading-out terminal that the mother protects reactor L is used as the outlet of device End.

The second high-speed eddy switch K1 passes sequentially through high energy type fuse FU and female reactor L that protects and is grounded.The great Rong Measuring speed-sensitive switch FSR is used to, when short trouble occurs for power system, mother is protected into reactor L and is quickly connected in series in loop, is passed through Mother protect reactor L can effective limiting short-circuit current intensity, greatly reduce impact of the short circuit current flow to electrical equipment.

As shown in figure 1, the electric discharge damper RL is composed in parallel by inductance L and resistance R, the one of the electric discharge damper RL The leading-out terminal for switching K0 with the first high-speed eddy is held to be connected, the other end is connected with female leading-out terminal for protecting reactor L.Discharge damper RL is used to limit the discharge impact electric current that mother protects reactor L, prevents female reactor L that protects from being damaged due to excessively stream, makes female guarantor's reactance Device L both end voltages can be limited in a relatively low level, substantially increase the frequency of female input current limliting for protecting reactor L.

As shown in figure 1, the first high-speed eddy switch K0, the second high-speed eddy switch K1 are vacuum interrupter arc extinguishing Breaker.One end of the first high-speed eddy switch K0 is connected with the end of incoming cables for the damper RL that discharges, and the other end protects electricity with female Anti- device L end of incoming cables is connected.When short trouble occurs in circuit on power system, after short trouble excision, controller is controlled immediately First high-speed eddy switch K0 closes a floodgate, so that mother is protected into reactor L short circuits, realizes female zero loss for protecting reactor L of normal operation.

As shown in figure 1, one end of the high energy type fuse FU is connected with female end of incoming cables for protecting reactor L, the other end and the Two high-speed eddies switch K1 leading-out terminal is connected.High energy type fuse FU is used to control female making time for protecting reactor L, as mother guarantor When reactor L exceedes effective current limliting time, high energy type fuse FU disconnects immediately, prevents female reactor L that protects because of long-time input It is damaged.

As shown in figure 1, female reactor L, Fast Switch with Large Capacity FSR, first high-speed eddy of protecting switchs K0, electric discharge resistance Buddhist nun's device RL, high energy type fuse FU and the second high-speed eddy switch K1 are installed in power distribution cabinet.The Fast Switch with Large Capacity FSR, the first high-speed eddy switch K0, the second high-speed eddy switch K1 control it to open by the controller in power distribution cabinet It is disconnected.

Operation principle of the present utility model is as follows：When short trouble occurs for any branch road under bus feeder line, Large Copacity is high When speed switch FSR can protect reactor L inputs in 0.15ms mothers, reactor L is protected by the short-circuit current of this feeder line by mother The size of the rated current of this feeder line is restricted to, so as to effectively prevent bus from making whole piece bus because a branch road breaks down Decompression, greatly reduces the scope of short trouble.When mother protects reactor L inputs, fault branch short circuit current flow is substantially reduced, branch road Breaker can effectively cut off the short trouble of the branch road；When the branch breaker is because breaking down, it is impossible to quickly cut off this branch During the short trouble on road, fast acting control system controls the second high-speed eddy to switch K1 separating brakes immediately, and whole piece branch road is isolated, Prevent the further expansion of short trouble.After short trouble is cut off by this branch breaker, fast acting control system control first High-speed eddy switch K0 is closed immediately, and mother's guarantor's reactor L is carried out into short circuit, prevents female reactor L that protects from putting into consumption for a long time largely The actual motion problem of reactive loss and user terminal brownout.

Claims

1. a kind of self-shield bus residual voltage holding meanss based on Fast Switch with Large Capacity FSR, it is characterised in that：Electricity is protected including mother Anti- device L, for the female Fast Switch with Large Capacity FSR for protecting reactor L of quick input after system short-circuit, for short trouble excision after Exit female the first high-speed eddy switch K0 for protecting reactor L, the electric discharge resistance for limiting female discharge impact electric current for protecting reactor L Buddhist nun's device RL, for preventing from female protecting high energy type fuse FU and the second high speed whirlpool that reactor L is damaged because long-time is put into Stream switch K1；The high energy type fuse FU with mother protect reactor L connect, the two connect after respectively with connect after the first high speed whirlpool Stream switch K0 and electric discharge damper RL, Fast Switch with Large Capacity FSR are in parallel, a second high-speed eddy switch K1 terminating set End of incoming cables, another termination high energy type fuse FU end of incoming cables.

2. the self-shield bus residual voltage holding meanss according to claim 1 based on Fast Switch with Large Capacity FSR, its feature It is：The electric discharge damper RL is composed in parallel by inductance L and resistance R, one end and the first high speed of the electric discharge damper RL Vortex switch K0 leading-out terminal is connected, and the other end is connected with female leading-out terminal for protecting reactor L.

3. the self-shield bus residual voltage holding meanss according to claim 1 based on Fast Switch with Large Capacity FSR, its feature It is：The first high-speed eddy switch K0, the second high-speed eddy switch K1 are vacuum interrupter arc extinguishing breaker.

4. the self-shield bus residual voltage holding meanss according to claim 1 based on Fast Switch with Large Capacity FSR, its feature It is：Female reactor L, Fast Switch with Large Capacity FSR, first high-speed eddy of protecting switchs K0, electric discharge damper RL, high energy type Fuse FU and the second high-speed eddy switch K1 are installed in power distribution cabinet.

5. the self-shield bus residual voltage holding meanss according to claim 1 based on Fast Switch with Large Capacity FSR, its feature It is：The Fast Switch with Large Capacity FSR, the first high-speed eddy switch K0, the second high-speed eddy switch K1 by installed in Controller in power distribution cabinet controls it to cut-off.