CN207910448U - A kind of high pressure novel bus voltage rapid protection system - Google Patents

Abstract

The utility model is related to high pressure novel bus voltage rapid protection systems, including the first isolation switch G1, the end of incoming cables AL1 of its inlet wire terminating systems, its outlet terminates the end of incoming cables of energy absorbing type fuse FU, the leading-out terminal of energy absorbing type fuse FU respectively with current-limiting reactor L1, the end of incoming cables of second high-speed eddy switch K2 is connected, the leading-out terminal of current-limiting reactor L1 is connected with the end of incoming cables of the first high-speed eddy switch K1, the leading-out terminal of second high-speed eddy switch K2 is connected with the end of incoming cables of electric discharge damper RL, first high-speed eddy switch K1, the leading-out terminal of electric discharge damper RL is connected with the end of incoming cables of the second isolation switch G2, the leading-out terminal AL2 of the outlet terminating systems of second isolation switch G2.Short trouble is isolated in the timely and effective excision of the utility model energy, prevents the further expansion of short trouble range, not decompression of the busbar in feeder line branch, short-circuit failure is effectively ensured.

Description

A kind of high pressure novel bus voltage rapid protection system

Technical field

The utility model is related to electric power system power distribution equipment current limiting technique field, especially a kind of high pressure novel bus voltage Rapid protection system.

Background technology

With the development of economy, the sharp increase of business electrical load, power grid median generatrix institute band branch is more and more, works as mother Short circuit occurs for a certain branch under line, and drop is serious suddenly for the busbar voltage being connected with the branch, and the voltage of busbar remnants is generally below The 20% of rated voltage has cut off short trouble, busbar voltage could be restored only when the branch breaker is cut-off.Busbar voltage There is this period that is recessed, Enterprise Power System is referred to as " shaking electricity ".During " shaking electricity " occurs, busbar 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, solenoid valve.These are anti-to " shaking electricity " Referred to as sensitive loads should be significantly loaded, its main feature is that having mechanical movement and having the presence of electric energy or magnetic energy energy-storage travelling wave tube. When usual busbar residual voltage is below 50%, sensitive loads tolerable " shaking electricity " time is not more than 30ms.When short circuit occurs for foreign network Area's Intranet whole all load or part important load can be switched to another foreign network by failure, but certain in area's Intranet is propped up Short circuit, which occurs, for road integrally to have switched, and can only partly switch.If important sensitive loads artificially focus in area's Intranet A small number of branches or its circuitry number are originally few, and part switching is can to solve area's Intranet short circuit to cause asking for important load stoppage in transit Topic, necessary condition is that have the suitable foreign network that can switch.If there are many important sensitive loads branch in area's Intranet, part The cost of switching is just too big, if changeable foreign network condition does not have, to solve the problems, such as that area's Intranet shakes electricity, adopt It is desirable scheme with busbar residual voltage holding meanss.

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

Utility model content

It can effectively ensure that busbar in feeder line branch, short-circuit failure not the purpose of this utility model is to provide a kind of Decompression realizes that short trouble excision stepmother protects zero loss of reactor, and the high pressure of the reliability and safety that improve power supply is novel Busbar voltage rapid protection system.

To achieve the above object, the utility model uses following technical scheme：A kind of high pressure novel bus voltage is quick Protection system, including it is current-limiting reactor L1, energy absorbing type fuse FU, electric discharge damper RL, the first high-speed eddy switch K1, second high Speed vortex switch K2, the first isolation switch G1, the second isolation switch G2 and third are from disconnecting link G3；The first isolation switch G1's The end of incoming cables of the outlet termination energy absorbing type fuse FU of the end of incoming cables AL1 of inlet wire terminating systems, the first isolation switch G1, energy absorbing type are molten The leading-out terminal of silk FU is connected with the end of incoming cables of the end of incoming cables of current-limiting reactor L1, the second high-speed eddy switch K2 respectively, current limliting electricity The leading-out terminal of anti-device L1 is connected with the end of incoming cables of the first high-speed eddy switch K1, the leading-out terminal of the second high-speed eddy switch K2 with put The end of incoming cables of electrical deoscillator RL is connected, the leading-out terminal of the first high-speed eddy switch K1, the damper RL that discharges leading-out terminal with the The end of incoming cables of two isolation switch G2 is connected, and the leading-out terminal AL2 of the outlet terminating systems of the second isolation switch G2, third is from disconnecting link G3 End of incoming cables be connected with the end of incoming cables of the first isolation switch G1, leading-out terminal of the third from disconnecting link G3 goes out with the second isolation switch G2's Line end is connected.

The first high-speed eddy switch K1, the second high-speed eddy switch K2 are vortex driving, vacuum interrupter arc extinguishing Breaker, the controller of the first high-speed eddy switch K1, the second high-speed eddy switch K2 by being installed in Electric Appliance Cabinet Control its quick-speed turning on-off.

The first isolation switch G1, the second isolation switch G2, third are from disconnecting link G3 by power distribution cabinet Operating mechanism controls the action of its on/off switch.

The electric discharge damper RL is composed in parallel by inductance L and resistance R.

As shown from the above technical solution, the beneficial effects of the utility model are：The utility model can it is timely and effective excision every From short trouble, the further expansion of short trouble range is prevented, busbar is effectively ensured in feeder line branch, short-circuit failure not Decompression；The utility model is high, simple in structure with reliability, action is fast, saves cable and transformer investment and running wastage etc. Advantage.

Description of the drawings

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

Specific implementation mode

As shown in Figure 1, a kind of high pressure novel bus voltage rapid protection system, including current-limiting reactor L1, energy absorbing type are molten Silk FU, electric discharge damper RL, the first high-speed eddy switch K1, the second high-speed eddy switch K2, the first isolation switch G1, second every From disconnecting link G2 and third from disconnecting link G3；The end of incoming cables AL1 of the inlet wire terminating systems of the first isolation switch G1, the first isolation knife The end of incoming cables of the outlet termination energy absorbing type fuse FU of lock G1, the leading-out terminal of energy absorbing type fuse FU respectively with current-limiting reactor L1 into Line end, the end of incoming cables of the second high-speed eddy switch K2 are connected, the leading-out terminal of current-limiting reactor L1 and the first high-speed eddy switch K1 End of incoming cables be connected, the leading-out terminal of the second high-speed eddy switch K2 is connected with the end of incoming cables for the damper RL that discharges, the first high speed whirlpool The leading-out terminal of stream switch K1, the leading-out terminal of electric discharge damper RL are connected with the end of incoming cables of the second isolation switch G2, the second isolation The leading-out terminal of the outlet terminating systems of disconnecting link G2, the end of incoming cables phase of end of incoming cables of the third from disconnecting link G3 and the first isolation switch G1 Even, leading-out terminal of the third from disconnecting link G3 is connected with the leading-out terminal of the second isolation switch G2.

As shown in Figure 1, the first high-speed eddy switch K1, the second high-speed eddy switch K2 are vortex driving, vacuum Arc-chutes arc extinguishing breaker, the first high-speed eddy switch K1, the second high-speed eddy switch K2 are by being installed on Electric Appliance Cabinet In controller control its quick-speed turning on-off.The first isolation switch G1, the second isolation switch G2, third pass through from disconnecting link G3 Operating mechanism in power distribution cabinet controls the action of its on/off switch, for component in ceaselessly maintenance or replacement system.Institute The intensity that current-limiting reactor L1 is used for limitation short circuit when short circuit is stated, impact of the short circuit current to electrical equipment is reduced.The energy-absorbing The time that limitation current-limiting reactor L1 puts into operation when type fuse FU is for short circuit, prevent current-limiting reactor L1 from being damaged because of overcurrent It is bad.The electric discharge damper RL is in parallel and is formed by inductance L and resistance R, is opened by the second high-speed eddy for current-limiting reactor L1 Close the intensity that K2 limits its discharge impact electric current.

The operation principle of the utility model is as follows：When short trouble occurs for any branch under busbar feeder line, the second high speed Switch K2 separating brakes in 2ms are vortexed, current-limiting reactor L1 is quickly concatenated into circuit, feeder line short circuit current is restricted to its volume The size of constant current enables branch breaker effectively to cut off the short trouble of the branch；When the branch breaker is because breaking down When, when cannot quickly cut off the short trouble of this branch, the first high-speed eddy switch K1 separating brakes are immediately controlled in system, by whole Road is isolated, and the further expansion of short trouble is prevented.After short trouble is cut off by this branch breaker, controlled in system Device immediately to the second high-speed eddy switch K2 send out combined floodgate order, the second high-speed eddy switch K2 can within 2ms rapid short circuit Current-limiting reactor L1；After current-limiting reactor L1 is shorted protection, electric discharge damper RL immediately puts current-limiting reactor L1 Electricity, the interior electric energy stored of release current-limiting reactor L1, prevents current-limiting reactor L1 overcurrents and damages；The energy absorbing type fuse FU is used The time that current-limiting reactor L1 puts into operation is limited when short circuit, prevents current-limiting reactor L1 from being damaged because of overcurrent.

In conclusion the utility model can timely and effective excision isolation short trouble, prevent short trouble range into one Step expands, and not decompression of the busbar in feeder line branch, short-circuit failure is effectively ensured；The utility model has reliability height, structure letter List acts the advantages that fast, saving cable and transformer investment and running wastage.

Claims (4)

1. a kind of high pressure novel bus voltage rapid protection system, it is characterised in that：Including current-limiting reactor L1, energy absorbing type fuse FU, electric discharge damper RL, the first high-speed eddy switch K1, the second high-speed eddy switch K2, the first isolation switch G1, the second isolation Disconnecting link G2 and third are from disconnecting link G3；The end of incoming cables AL1 of the inlet wire terminating systems of the first isolation switch G1, the first isolation switch The end of incoming cables of the outlet termination energy absorbing type fuse FU of G1, the leading-out terminal of the energy absorbing type fuse FU inlet wire with current-limiting reactor L1 respectively End, the end of incoming cables of the second high-speed eddy switch K2 are connected, the leading-out terminal of current-limiting reactor L1 and the first high-speed eddy switch K1's End of incoming cables is connected, and the leading-out terminal of the second high-speed eddy switch K2 is connected with the end of incoming cables of electric discharge damper RL, the first high-speed eddy The leading-out terminal of switch K1, the leading-out terminal of electric discharge damper RL are connected with the end of incoming cables of the second isolation switch G2, the second isolation knife The leading-out terminal AL2 of the outlet terminating systems of lock G2, the end of incoming cables phase of end of incoming cables of the third from disconnecting link G3 and the first isolation switch G1 Even, leading-out terminal of the third from disconnecting link G3 is connected with the leading-out terminal of the second isolation switch G2.

2. high pressure novel bus voltage rapid protection system according to claim 1, it is characterised in that：First high speed Vortex switch K1, the second high-speed eddy switch K2 are vortex driving, vacuum interrupter arc extinguishing breaker, first high speed whirlpool Stream switch K1, the second high-speed eddy switch K2 control its quick-speed turning on-off by the controller being installed in Electric Appliance Cabinet.

3. high pressure novel bus voltage rapid protection system according to claim 1, it is characterised in that：First isolation Disconnecting link G1, the second isolation switch G2, third control its on/off switch from disconnecting link G3 by the operating mechanism in power distribution cabinet Action.

4. high pressure novel bus voltage rapid protection system according to claim 1, it is characterised in that：The electric discharge damping Device RL is composed in parallel by inductance L and resistance R.