CN207765948U - One kind is based on LC electric discharge concussion voltage retaining devices - Google Patents
One kind is based on LC electric discharge concussion voltage retaining devices Download PDFInfo
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- CN207765948U CN207765948U CN201721785184.2U CN201721785184U CN207765948U CN 207765948 U CN207765948 U CN 207765948U CN 201721785184 U CN201721785184 U CN 201721785184U CN 207765948 U CN207765948 U CN 207765948U
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- speed eddy
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Abstract
The utility model is related to one kind based on LC electric discharge concussion voltage retaining devices; including high-speed eddy switch K0, K1; mother protects reactor L2 and short-circuit protection circuit; the end of incoming cables of the high-speed eddy switch K0 and the end of incoming cables of power distribution cabinet connect; the leading-out terminal of high-speed eddy switch K0 and the leading-out terminal of power distribution cabinet connect; the end of incoming cables of the high-speed eddy switch K1 is connect with the end of incoming cables of high-speed eddy switch K0, and leading-out terminal is connected by female leading-out terminal for protecting reactor L2 and power distribution cabinet；The short-circuit protection circuit is connected in parallel on the both ends of high-speed eddy switch K0, shifts to an earlier date arc extinguishing for controlling high-speed eddy switch K0, realizes the female use for protecting reactor L2 of input.The utility model has simple in structure, safe and reliable, action soon, isolation short trouble can be cut off in time, not decompression of the busbar in feeder line branch, short-circuit failure is effectively ensured in the further expansion for preventing short trouble range, and zero loss that short trouble excision stepmother protects reactor may be implemented.
Description
Technical field
The utility model is related to electrical system bus residual voltages to keep technical field, and in particular to one kind is based on LC electric discharge concussions
Voltage retaining device.
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 trouble occurs for foreign network, whole loads or part important load that can be by area's Intranet entirety be switched to separately
One foreign network, but certain branch 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 branches or its circuitry number is originally few, and part switching is that can to solve area's Intranet short
The problem of road causes important load to stop transport, necessary condition are that have the suitable foreign network that can switch.If important in area's Intranet
Sensitive loads branch it is very much, the cost of part switching is just too big, if the foreign network condition that can be switched does not have,
It solves the problems, such as that area's Intranet shakes electricity, is desirable scheme using 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
The purpose of this utility model is to provide one kind based on LC electric discharge concussion voltage retaining devices, apparatus structure letter
Single, safe and reliable, action is fast, can cut off isolation short trouble in time, prevent the further expansion of short trouble range, effectively protects
Demonstrate,prove busbar not decompression in feeder line branch, short-circuit failure.
To achieve the above object, the utility model uses following technical scheme：Including high-speed eddy switch K0, high speed whirlpool
Flow switch K1, female guarantor reactor L2 and short-circuit protection circuit, the inlet wire of the end of incoming cables and power distribution cabinet of the high-speed eddy switch K0
End connection, the leading-out terminal of high-speed eddy switch K0 and the leading-out terminal of power distribution cabinet connect, the end of incoming cables of the high-speed eddy switch K1
It is connect with the end of incoming cables of high-speed eddy switch K0, leading-out terminal is connected by female leading-out terminal for protecting reactor L2 and power distribution cabinet；Institute
The both ends that short-circuit protection circuit is connected in parallel on high-speed eddy switch K0 are stated, shift to an earlier date arc extinguishing for controlling high-speed eddy switch K0, are realized
The female use for protecting reactor L2 of input.
Further, the short-circuit protection circuit includes reactor L1, controllable silicon SCR, capacitor C and nonlinear resistance
The end of incoming cables of FR, the reactor L1 and the end of incoming cables of power distribution cabinet connect, the leading-out terminal of reactor L1 and controllable silicon SCR
End of incoming cables, the leading-out terminal of controllable silicon SCR and the leading-out terminal of power distribution cabinet connect, and the capacitor C is connected in parallel on nonlinear resistance FR's
Both ends.
Further, described high-speed eddy switch K0, K1 are vacuum interrupter arc extinguishing breaker, and are matched by being mounted on
Controller in electric cabinet controls it and cut-offs.
Further, the high-speed eddy switch K0, high-speed eddy switch K1, female guarantor reactor L2 and short-circuit protection circuit
It is installed in power distribution cabinet.
As shown from the above technical solution, described in the utility model based on LC electric discharge concussion voltage retaining devices, there is knot
The advantages that structure is simple, safe and reliable, action is fast, can 0.15ms put into it is female protect reactor L, more than passing through open circuit currently on the market
The female switching speed for protecting reactor L of device control is fast, can cut off isolation short trouble in time, prevent short trouble range into one
Step expands, and not decompression of the busbar in feeder line branch, short-circuit failure is effectively ensured, and short trouble excision stepmother may be implemented and protect
Zero loss of reactor.
Description of the drawings
Fig. 1 is the electrical schematic diagram of the utility model.
Specific implementation mode
The utility model is described further below in conjunction with the accompanying drawings：
As shown in Figure 1, voltage retaining device is shaken in being discharged based on LC for the present embodiment, include the height in power distribution cabinet
Speed vortex switch K0, high-speed eddy switch K1, female guarantor reactor L2 and short-circuit protection circuit, the inlet wire of high-speed eddy switch K0
End is connect with the end of incoming cables of power distribution cabinet, and the leading-out terminal of high-speed eddy switch K0 and the leading-out terminal of power distribution cabinet connect, and high-speed eddy is opened
The end of incoming cables for closing K1 is connect with the end of incoming cables of high-speed eddy switch K0, and leading-out terminal is gone out by mother guarantor reactor L2 and power distribution cabinet
Line end connects；Short-circuit protection circuit is connected in parallel on the both ends of high-speed eddy switch K0, goes out in advance for controlling high-speed eddy switch K0
Arc realizes the female use for protecting reactor L2 of input.
The short-circuit protection circuit includes reactor L1, controllable silicon SCR, capacitor C and nonlinear resistance FR, reactor L1's
End of incoming cables and the end of incoming cables of power distribution cabinet connect, and the leading-out terminal of reactor L1 and the end of incoming cables of controllable silicon SCR, controllable silicon SCR go out
The leading-out terminal of line end and power distribution cabinet connects, and capacitor C is connected in parallel on the both ends of nonlinear resistance FR.The present embodiment, high-speed eddy
Switch K0, K1 are vacuum interrupter arc extinguishing breaker, and control it by the controller in power distribution cabinet and cut-off.
It when high-speed eddy switch K0 breaks down for any branch in feeder line lower end, quickly disconnects, mother is protected into reactor
L2 is put into circuit, and short circuit current on the feeder line is restricted to normal operating current level by mother newspaper reactor L2, is ensured
The normal power supply of other branches；After high-speed eddy switch K1 is for female guarantor's reactor L2 inputs, the feeder line lower end branch trouble is still
When not cutting off, whole branch is cut off by high-speed eddy switch K1, prevents short trouble range from further expanding.Capacitor C
With reactor L1 after controllable silicon SCR is connected, the high current of high frequency is formed in the loop, and the high current of high frequency flows through high-speed eddy
Switch K0 makes line current reach zero passage in advance, realizes the arc extinguishing in advance of high-speed eddy switch K0, and then realizes that 4ms inputs are female and protect
Reactor L2, nonlinear resistance FR are used for protective condenser C, prevent capacitor C from being damaged because of overvoltage.
Operation principle：When short trouble occurs for electric system, controller immediately to high-speed eddy switch K0 sub-gate signals,
Mother is protected into reactor L2 inputs；The controllable silicon SCR conducting of controller control simultaneously, makes capacitor C and reactor L1 shapes in the loop
At the high current of high frequency, the high current of high frequency, which flows through high-speed eddy switch K0, makes line current reach zero passage in advance, realizes high speed
It is vortexed the arc extinguishing in advance of switch K0, realizes that 4ms inputs are female and protects reactor L2, nonlinear resistance FR is used for protective condenser C, prevents
Capacitor C is damaged because of overvoltage.Capacitor C, nonlinear resistance FR, controllable silicon SCR, reactor L1 are used to form high frequency oscillation,
So that high-speed eddy switch K0 is shifted to an earlier date arc extinguishing, realizes that 4ms inputs are female and protect reactor L2；Reactor L2 is protected by this feeder line by mother
Short-circuit current is restricted to the size of the rated current of this feeder line, to effectively prevent busbar to break down because of a branch
And make whole bus loss of pressure, greatly reduce the range of short trouble.When mother protects reactor L2 inputs, fault branch short circuit current
It substantially reduces, branch breaker can effectively cut off the short trouble of the branch；It, cannot when the branch breaker is because breaking down
When quickly cutting off the short trouble of this branch, high-speed eddy switch K1 separating brakes are immediately controlled in controller, by whole branch carry out every
From preventing the further expansion of short trouble.After short trouble is cut off by this branch breaker, controller controls high-speed eddy
Switch K0 is closed immediately, and mother, which is protected reactor L2, carries out short circuit, prevents female reactor L2 that protects from putting into a large amount of idle damages of consumption for a long time
The actual motion problem of consumption and user terminal brownout.
Embodiment described above is only that preferred embodiments of the present invention are described, not to this practicality
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various modifications and improvement that the technical solution of utility model is made should all fall into the protection of the utility model claims book determination
In range.
Claims (4)
1. one kind is based on LC electric discharge concussion voltage retaining devices, it is characterised in that：It is opened including high-speed eddy switch K0, high-speed eddy
K1, female guarantor reactor L2 and short-circuit protection circuit are closed, the end of incoming cables of the high-speed eddy switch K0 and the end of incoming cables of power distribution cabinet connect
It connects, the leading-out terminal of high-speed eddy switch K0 and the leading-out terminal of power distribution cabinet connect, end of incoming cables and the height of the high-speed eddy switch K1
The end of incoming cables connection of speed vortex switch K0, leading-out terminal are connected by female leading-out terminal for protecting reactor L2 and power distribution cabinet；It is described short
Road protects circuit in parallel at the both ends of high-speed eddy switch K0, shifts to an earlier date arc extinguishing for controlling high-speed eddy switch K0, realizes input
Mother protects the use of reactor L2.
2. according to claim 1 based on LC electric discharge concussion voltage retaining devices, it is characterised in that：The short-circuit protection electricity
Road includes end of incoming cables and the power distribution cabinet of reactor L1, controllable silicon SCR, capacitor C and nonlinear resistance FR, the reactor L1
End of incoming cables connects, and the leading-out terminal of reactor L1 and the end of incoming cables of controllable silicon SCR connect, the leading-out terminal and power distribution cabinet of controllable silicon SCR
Leading-out terminal connection, the capacitor C is connected in parallel on the both ends of nonlinear resistance FR.
3. according to claim 1 based on LC electric discharge concussion voltage retaining devices, it is characterised in that：The high-speed eddy is opened
It is vacuum interrupter arc extinguishing breaker to close K0, K1, and controls it by the controller in power distribution cabinet and cut-off.
4. according to claim 1 based on LC electric discharge concussion voltage retaining devices, it is characterised in that：The high-speed eddy is opened
K0, high-speed eddy switch K1, female guarantor reactor L2 and short-circuit protection circuit is closed to be installed in power distribution cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721785184.2U CN207765948U (en) | 2017-12-18 | 2017-12-18 | One kind is based on LC electric discharge concussion voltage retaining devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721785184.2U CN207765948U (en) | 2017-12-18 | 2017-12-18 | One kind is based on LC electric discharge concussion voltage retaining devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207765948U true CN207765948U (en) | 2018-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721785184.2U Active CN207765948U (en) | 2017-12-18 | 2017-12-18 | One kind is based on LC electric discharge concussion voltage retaining devices |
Country Status (1)
| Country | Link |
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| CN (1) | CN207765948U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054733A (en) * | 2017-12-18 | 2018-05-18 | 安徽伊格瑞德电气设备有限公司 | One kind is based on LC electric discharge concussion voltage retaining devices |
| CN109509657A (en) * | 2018-11-23 | 2019-03-22 | 镇江市高等专科学校 | Relay controls high voltage direct current heavy load arc-control device |
-
2017
- 2017-12-18 CN CN201721785184.2U patent/CN207765948U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054733A (en) * | 2017-12-18 | 2018-05-18 | 安徽伊格瑞德电气设备有限公司 | One kind is based on LC electric discharge concussion voltage retaining devices |
| CN109509657A (en) * | 2018-11-23 | 2019-03-22 | 镇江市高等专科学校 | Relay controls high voltage direct current heavy load arc-control device |
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