CN202872458U - High-speed switching device - Google Patents
High-speed switching device Download PDFInfo
- Publication number
- CN202872458U CN202872458U CN2012205271576U CN201220527157U CN202872458U CN 202872458 U CN202872458 U CN 202872458U CN 2012205271576 U CN2012205271576 U CN 2012205271576U CN 201220527157 U CN201220527157 U CN 201220527157U CN 202872458 U CN202872458 U CN 202872458U
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- CN
- China
- Prior art keywords
- switching
- voltage
- sensitive loads
- circuit breaker
- switching device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The utility model relates to a high-speed switching device. The device comprises a controller and a circuit breaker, the controller catches the change of the voltage within 2 ms starting from the moment when the voltage drops sharply, judges whether a continuous change causes stop or impact to sensitive loads or not, and sends out a switching instruction according to a judgment result, and the circuit breaker completes the action of switching-on and switching-off within 10 ms after receiving the switching instruction, and switches subcircuits of the sensitive loads to a standby power supply. The measurement and control time of the high-speed switching device plus the switching-on and switching-off time of a switch is less than 12 ms, fully satisfies the requirement for protecting the sensitive loads, can prevent adverse effects of voltage sag on frequency converters, motors and relays, and prevent accident loss caused by voltage sag.
Description
Technical field
The utility model relates to a kind of electrical network rolling electrical protective device, is specifically related to a kind of high speed switching device.
Background technology
The internal electric network of large and medium-sized enterprise (abbreviation Intranet) links to each other with national grid (abbreviation outer net), forms electric power system.Any branch road short circuit occurs and all can cause the voltage of whole system to fall in this system, and the higher grade of branch voltage that is short-circuited, and influence surface is larger, falls value also larger.After short circuit occured, the protective device of this branch road made circuit breaker trip excision fault branch with action.Occur to failure removal during this period of time from short circuit, the system voltage experience is from dropping into the process of recovery, and this phenomenon is called the rolling electricity.
Various very large to shaking the reaction difference of electricity with electric loading, can classify according to the consequence that rolling electricity produces to them: after the rolling electricity finished, load can continue normal operation, is called non-sensitive load, such as illumination, electric furnace etc.; In voltage generation depression process and in moment that voltage recovers, the load of outage, or the load that circuit is produced heavy current impact, be called sensitive loads, the characteristics of this class load are the existence that mechanical movement is arranged and the electric or magnetic energy-storage travelling wave tube is arranged, such as motor, frequency-conversion and speed-regulation motor group, relay etc.
When outer network short circuit fault is the main cause of rolling electricity, if the Intranet load is switched on the normal outer net circuit for subsequent use of voltage, switch being with regular tap impossible success, because it is too slow that the root of rolling electricity harm is exactly regular tap excision short circuit branch, and switch and must first load be excised from the fault electrical network, and then it is put on the normal electrical network, excision adds input, two actions are finished in switching an operate time must be longer than the rolling electroblations, in addition cut the time that also will add the electric current natural zero-crossing between the throwing.This shows, switch success, depend at present the separating brake of switch and the speed of feed motion, and that controller sends switching command is fast again, also nonsensical.
The closing time of existing middle pressure large capcity breaker is all greater than 30ms on the market, add controller sampling, calculate about the time 10ms that sends reclosing command, surpassed the rolling electricity time that sensitive loads can be tolerated, be to guarantee the normal operation of sensitive loads in the electric situation in rolling, if motor bringing onto load not, the phase place electrical degree is poor much smaller during than bringing onto load during the voltage sag, be easy to switch, be with load, then power output is larger, more is not easy to switch.
The rolling electricity has a strong impact on frequency converter, motor and relay; the accident that the rolling electricity causes often causes very large economic loss; for a cover process units of chemical enterprise; its production procedure is in case interrupt; will produce heavy losses; if effectively fast switching protection of a cover is installed, the stopping production that the electricity that just can prevent from shaking causes, thus effectively avoid the loss that brings thus.
If reduced within the tolerable recess width of sensitive loads the switching time (from the accident to switching the time of finishing) of existing apparatus for fast switching, the harm problem of rolling electricity just can be to solving.
The utility model content
For the above-mentioned shortcoming and defect that prior art exists, the utility model provides a kind of high speed switching device, and the branch wire time that its observing and controlling time adds switch satisfies the requirement to the sensitive loads protection fully less than 12ms.
The utility model is achieved through the following technical solutions:
A kind of high speed switching device, comprise controller and circuit breaker, described controller captures the variation of voltage in 2 milliseconds from the moment that voltage falls suddenly, judge stoppage in transit or impact that described variation continues whether can cause sensitive loads, and send switching command according to described judged result, described circuit breaker is finished the action of divide-shut brake in 10 milliseconds after receiving described switching command, the branch road that sensitive loads is arranged is changed on the stand-by power supply.
Preferably, described controller comprises signal interface unit, collection and computing unit, signal output unit, power subsystem and display unit.
The branch wire time that the observing and controlling time of the present utility model adds switch is less than 12ms, satisfies the requirement to the sensitive loads protection fully, and voltage shock avoiding is to the harmful effect of frequency converter, motor and relay in advance, the causality loss that the electricity of avoiding shaking causes.
Description of drawings
Fig. 1 is internal structure schematic diagram of the present utility model;
Fig. 2 is outward appearance front view of the present utility model.
Embodiment
Below in conjunction with specific embodiment the utility model is elaborated.Following examples will help those skilled in the art further to understand the utility model, but not limit in any form the utility model.Should be pointed out that to those skilled in the art, without departing from the concept of the premise utility, can also make some distortion and improvement.These all belong to protection range of the present utility model.
High speed switching device as depicted in figs. 1 and 2; comprise controller 1; high-voltage charge display device 2; manual change-over switch 3; indicator light 4; nameplate 5; simulation board 6; busbar 7 in the cabinet; built-in Lip river gram fixed contact box 8; circuit breaker 9; overvoltage protection device 10 and earthed switch 11; described controller captures the variation of voltage in 2 milliseconds from the moment that voltage falls suddenly; and judge stoppage in transit or the impact that described variation continues whether can cause sensitive loads; send switching command according to described judged result; described circuit breaker is finished the action of divide-shut brake in 10 milliseconds after receiving described switching command, the branch road that sensitive loads is arranged is changed on the stand-by power supply.
For the short circuit current that improves circuit breaker when the separating brake cut-offs capacity, improve the useful life of circuit breaker, what controller sent is the control command of accurate phase-splitting so that circuit breaker each cut-off when mutually all being several milliseconds of zero points before current over-zero, reduce the contact of breaker arc burning as far as possible; Can adopt the reclosing phase by phase control technology during this breaker closing, make the combined floodgate impulse current reduce to minimum.
Controller can send actuating signal within the working power system is short-circuited fault or dead electricity 2 milliseconds, realize the automatic switchover of two-way power supply.
When branch road or outer net were short-circuited fault beyond this branch road, concerning motor, the motor of this branch road was less to the short dot feedback current, and voltage declines to a great extent, and is judged to be external short-circuit with this, can switch.Concerning the branch road of frequency converter, voltage declines to a great extent, and frequency converter AC voltage is lower than the DC side busbar voltage, and this branch road input current is zero, switches immediately.
When the short circuit of the inner generation of this branch road near region, short circuit current is larger, and voltage declines to a great extent, and is district's internal short-circuit.Can only cut off branch road this moment, can not switch to stand-by power supply to the branch road that is short-circuited and get on.
When the power-off faults such as working power generation higher level switch jump, electric current is zero, and the voltage continuous decrease should switch immediately.
By the analysis to system power, change in voltage feature, can judge system failure type, thereby take corresponding Switching Strategy.The algorithm that the utility model provides can rise at short circuit current and finish calculating to short circuit current, busbar voltage in 2 milliseconds, judges intranet and extranet short circuit and voltage sag, and sends actuating signal.For the branch road that motor is arranged, controller sends sub-gate signal and switching signal immediately, at the zero crossing cutting-off of short-circuit electric current of first cycle, finishes in 30 milliseconds sensitive loads is cut and change the operation that switches to stand-by power supply from the short circuit system.For the branch road that frequency converter is arranged, because system voltage drops to and is lower than capacitor of frequency converter voltage, input current is zero, and switch can be finished the operation of frequency converter being cut and switching on the stand-by power supply from the short circuit system in 15 milliseconds.
Normal each phase voltage of operation Time Controller testing power supply, the load current of demonstration working power each phase voltage of bus and institute's control branch road on the panel.As find stand-by power supply unusually then locking stand-by power supply switching circuit and warning, the Display panel malfunction is exported passive switch amount contact point signal, and reports fault message by the microcomputer communication system to control centre.
Claims (2)
1. high speed switching device, it is characterized in that, comprise controller and circuit breaker, described controller captures the variation of voltage in 2 milliseconds from the moment that voltage falls suddenly, judge stoppage in transit or impact that described variation continues whether can cause sensitive loads, and sending switching command according to described judged result, described circuit breaker is finished the action of divide-shut brake in 10 milliseconds after receiving described switching command, the branch road that sensitive loads is arranged is changed on the stand-by power supply.
2. high speed switching device according to claim 1 is characterized in that, described controller comprises signal interface unit, collection and computing unit, signal output unit, power subsystem and display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205271576U CN202872458U (en) | 2012-10-16 | 2012-10-16 | High-speed switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205271576U CN202872458U (en) | 2012-10-16 | 2012-10-16 | High-speed switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202872458U true CN202872458U (en) | 2013-04-10 |
Family
ID=48039147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205271576U Expired - Fee Related CN202872458U (en) | 2012-10-16 | 2012-10-16 | High-speed switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202872458U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790430A (en) * | 2016-04-29 | 2016-07-20 | 中电新源智能电网科技有限公司 | Quick-switching combined electrical appliance |
| CN106410786A (en) * | 2016-08-28 | 2017-02-15 | 安徽普天电力科技有限公司 | Circuit breaking method of high-speed circuit breaker |
| CN106451334A (en) * | 2016-08-28 | 2017-02-22 | 安徽普天电力科技有限公司 | Method for controlling switching controller |
-
2012
- 2012-10-16 CN CN2012205271576U patent/CN202872458U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790430A (en) * | 2016-04-29 | 2016-07-20 | 中电新源智能电网科技有限公司 | Quick-switching combined electrical appliance |
| CN106410786A (en) * | 2016-08-28 | 2017-02-15 | 安徽普天电力科技有限公司 | Circuit breaking method of high-speed circuit breaker |
| CN106451334A (en) * | 2016-08-28 | 2017-02-22 | 安徽普天电力科技有限公司 | Method for controlling switching controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20141016 |
|
| EXPY | Termination of patent right or utility model |