CN102457058A - Arc-extinguishing voltage limiting device based on electronic switch - Google Patents
Arc-extinguishing voltage limiting device based on electronic switch Download PDFInfo
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- CN102457058A CN102457058A CN2010105295383A CN201010529538A CN102457058A CN 102457058 A CN102457058 A CN 102457058A CN 2010105295383 A CN2010105295383 A CN 2010105295383A CN 201010529538 A CN201010529538 A CN 201010529538A CN 102457058 A CN102457058 A CN 102457058A
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Abstract
The invention discloses an arc-extinguishing voltage limiting device based on an electronic switch, belonging to the technical field of a power distribution network. The device comprises a high voltage isolation electronic switch, a controllable combined voltage limiter, a voltage sensor and a microcomputer controller, wherein the high voltage isolation electronic switch consists of a switching transformer and an electronic control switch; the controllable combined voltage limiter consists of a zinc oxide non-liner resistor and a quick vacuum contactor; a primary of the switching transformer is connected with the primary of the voltage sensor in parallel, then connected with the controllable combined voltage limiter in parallel and connected between a system bus and the ground; a secondary of the switching transformer is connected with a turn-off quick thyristor by a rectification circuit; the control end of the quick thyristor is connected with the control output end of the microcomputer controller; and the input end of the microcomputer controller is connected with the secondary of the voltage sensor. The arc-extinguishing voltage limiting device is suitable for 6 kV, 10 kV and 35 kV neutral-point non-effectively grounded systems, can effectively inhibit ground arc and different overvoltages of the power system, and has the characteristics of quick action, flexible operation, safety and stability.
Description
Technical field
The present invention relates to the device in a kind of power distribution network technology field, specifically is a kind of quick arc extinguishing pressure limiting device based on electronic switch.
Technical background
When neutral point non-direct grounding system generation single phase intermittent arc grounding fault; Because unsettled intermittent electric arc repeatedly constantly extinguishes and restrikes; Can cause higher-order of oscillation overvoltage mutually with on the non-fault inductor-capacitor loop mutually in fault; This overvoltage is interrupted take place and overvoltage that amplitude is higher of moment owing to repeatedly constantly accumulation and reallocation formation again of electric charge on system's direct-to-ground capacitance, and is very harmful to the equipment of electric power system.For eliminating arc grounding, mainly be employed in system neutral at present arc suppression coil and two kinds of measures of the direct ground connection of bus are installed.Arc suppression coil not only can not suppress the arc grounding overvoltage, has strengthened superpotential amplitude sometimes on the contrary.The direct ground connection of bus is when arc grounding takes place, and through vacuum switch arcing ground is converted into bus metal ground connection apace, because the arc grounding overvoltage takes place in ground connection 20mS; And contactor operate time is often in a few tens of milliseconds; So can not effectively limit the arc light grounding surge, on the other hand, because the complexity of arcing ground; Can mistake close normal phase, cause two different ground short circuits.
Summary of the invention
The object of the invention is to overcome above-mentioned shortcoming of the prior art, provide a kind of safe, reliably, arc extinguishing pressure limiting device fast.
Realize the object of the invention, the technical solution that provides is:
Quick arc extinguishing pressure limiting device based on electronic switch comprises the isolated electronic switch of high pressure, Contrable combination type voltage limiter, voltage sensor and microcomputerized controller.The isolated electronic switch of high pressure is made up of switching regulator transformer and electronic control switch; Said switching regulator transformer is high open-circuit impedance, low short-circuit impedance formula transformer; Parallelly connected with the Contrable combination type voltage limiter again behind the elementary and voltage sensor of switching regulator transformer elementary parallelly connected; Connecting system bus behind the upper end series connection high voltage isolator, the lower end is connected with the earth.Switch transformer secondary is connected to one through a rectifier circuit and can turn-offs high speed thyristor, the control output end of the control termination microcomputerized controller of high speed thyristor.Said Contrable combination type voltage limiter is composed in series four unit by znr; One end of four unit links together and forms three-phase four stars shape structure; One of them unit parallel connection fast vacuum contactor; Deciliter coil of vacuum contactor connects the control output end of microcomputerized controller, the said voltage sensor of input termination of microcomputerized controller secondary.
When system's generation thunder and lightning or amplitude switching overvoltage, the action of Contrable combination type voltage limiter absorbs the overvoltage energy, and overvoltage Limiting is arrived lsafety level; When system's generation resonance, the isolated electronic switch action of high pressure is eliminated.When system's generation arc grounding; The charge discharging resisting that the isolated electronic switch of high pressure in the device can be fast stores the normal phase direct-to-ground capacitance is to the earth; Reduce grounded neutral displacement voltage and oscillatory process overvoltage significantly; Reduce the speed that fault scratch start road voltage to earth recovers, make the resume speed of arc road dielectric strength resume speed, realize arc extinguishing greater than voltage to earth.
Description of drawings
Accompanying drawing has been described one embodiment of the present of invention.
Accompanying drawing is the key wiring diagram of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing content of the present invention is further described:
Present embodiment comprises: high pressure switch isolation switch 1, Contrable combination type voltage limiter 2, high tension voltage transducer 3, the isolated electronic switch 4 of high pressure and microcomputer measuring and controlling unit 5.The principle wiring is: each passes through the elementary ground connection of switching regulator transformer 42 of elementary, the isolated electronic switch of high pressure of Contrable combination type voltage limiter 2, the high tension voltage transducer 3 of parallel connection respectively to three-phase bus mutually through three-phase high-voltage isolation switch 1 back; The output of voltage sensor 3 links to each other with the input of microcomputerized controller 5, and the controlled stage of Contrable combination type voltage limiter 2 and the isolated electronic switch of high pressure links to each other with the output of microcomputerized controller 5 respectively.
Said Contrable combination type voltage limiter 2 is that four sections znrs, 21,22,23,24 1 ends link together, and forms three-phase four unit star structures, wherein ground unit 24 parallelly connected fast vacuum contactors 25; When system normally moved, fast vacuum contactor 25 closed a floodgate, with znr 24 excisions; System's overvoltage is only by znr 21,22,23 restrictions; Improve overvoltage protection level, when system's generation single-phase earthing need continue to move, fast vacuum contactor 25 separating brakes; Znr 21,22,23 is connected with 25, guarantees the overvoltage protection device inherently safe.
The isolated electronic switch 4 of said high pressure is made up of current limiting fuse 41, switching regulator transformer 42 and electronic switch 43, and switching regulator transformer 42 is high open-circuit impedance, low short-circuit impedance formula transformer, secondary electronic switch 43 controls of being made up of rectifier circuit and quick turn-off thyristor; When system normally moved, turn-off thyristor turn-offed fast, and electronic switch 43 breaks off; Switching regulator transformer 42 is an open-circuit condition, is equivalent to switch and breaks off, when system's generation instantaneity ground connection; The turn-off thyristor quick-make; Electronic switch 43 is connected, and switching regulator transformer 42 is a short-circuit condition, is equivalent to switch closure; Discharge the electric charge of arcing ground moment circuit storage; Reduce the speed that neutral point displacement voltage and fault scratch start road voltage to earth recover, make the resume speed of arc road dielectric strength resume speed, realize the pressure limiting arc extinguishing greater than voltage to earth.Current limiting fuse 41 is used for protection switch transformer 42.
Said high pressure switch isolation switch 1, the electrical isolation when being used for the switching of device and realizing maintenance.
Said high tension voltage transducer 3 is made up of transducer 32 and protection fuse 31, is used for voltage transitions and signal is provided.The protection fuse is used to protect 31 transducers 32.
Said microcomputer measuring and controlling unit 5 is made up of input circuit 51, output circuit 54,55, microprocessor main circuit 52 and man-machine interface circuit 53.The voltage signal that input circuit 51 is sent voltage sensor 3 here is sent into microprocessor main circuit 52 through behind the filtering transformation; The signal that 52 pairs of input circuits 51 of microprocessor main circuit are sent here detects, calculating, judgement system running status; And export control signal and give output circuit 54,55, output circuit 54,55 is controlled voltage through high pressure isolation output and is given the transformer type switch 4 of fast controllable silicon control and the control end of Contrable combination type voltage limiter 2; Man-machine interface circuit 53 is used to realize the parameter input, and information shows.
The present embodiment course of work: when system normally moves; The isolated electronic switch 4 of device mesohigh breaks off; Contactor 24 closures in the Contrable combination type voltage limiter 2; When system's generation thunder and lightning or amplitude switching overvoltage, the znr 21 in the Contrable combination type voltage limiter 2 (22 or 23) absorbs the overvoltage energy, and overvoltage Limiting is arrived lower level; When system's generation resonance, 5 control high pressure isolated electronic switch 4 actions in microcomputer measuring and controlling unit are eliminated.When system's generation instantaneity ground connection; The isolated electronic switch 4 of high pressure in microcomputer measuring and controlling unit 5 control device is connected; The quick charge discharging resisting that the normal phase direct-to-ground capacitance is stored reduces grounded neutral displacement voltage and oscillatory process overvoltage significantly to the earth, reduces the speed that fault scratch start road voltage to earth recovers; Make the resume speed of arc road dielectric strength resume speed, realize arc extinguishing greater than voltage to earth.
Adopt the present invention to have advantage: action is quick, flexible operation, safety and stability.
Claims (5)
1. based on the quick arc extinguishing pressure limiting device of electronic switch, comprise the isolated electronic switch of high pressure, Contrable combination type voltage limiter, voltage sensor and microcomputerized controller.It is characterized in that: the isolated electronic switch of high pressure is made up of switching regulator transformer and electronic control switch; Parallelly connected with the Contrable combination type voltage limiter again behind the elementary and voltage sensor of switching regulator transformer elementary parallelly connected; Connecting system bus behind the upper end series connection high voltage isolator, the lower end is connected with the earth.
2. according to right 1 said quick arc extinguishing pressure limiting device based on electronic switch; It is characterized in that: the switching regulator transformer of the isolated electronic switch of said high pressure is a high open-circuit impedance, low short-circuit impedance transformer, and the secondary of switching regulator transformer is connected to an electronic switch that can turn-off the high speed thyristor composition through a rectifier circuit.
3. according to right 1 said quick arc extinguishing pressure limiting device based on electronic switch; It is characterized in that: the secondary microcomputerized controller input terminal that connects of said voltage sensor, the control end of the isolated electronic switch of microcomputerized controller output connection termination high pressure and the control end of Contrable combination type voltage limiter.
4. according to right 1 said quick arc extinguishing pressure limiting device based on electronic switch; It is characterized in that: said microcomputerized controller is made up of input circuit, output circuit, microprocessor main circuit and man-machine interface circuit; Input circuit is provided with input terminal, and output circuit is provided with outlet terminal.
5. according to right 1 said quick arc-control device based on electronic switch; It is characterized in that: the Contrable combination type voltage limiter is composed in series four unit by znr; One end of four unit links together and forms three-phase four stars shape structure, wherein ground unit parallel connection fast vacuum contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105295383A CN102457058A (en) | 2010-10-29 | 2010-10-29 | Arc-extinguishing voltage limiting device based on electronic switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105295383A CN102457058A (en) | 2010-10-29 | 2010-10-29 | Arc-extinguishing voltage limiting device based on electronic switch |
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| CN102457058A true CN102457058A (en) | 2012-05-16 |
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| CN2010105295383A Pending CN102457058A (en) | 2010-10-29 | 2010-10-29 | Arc-extinguishing voltage limiting device based on electronic switch |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931650A (en) * | 2012-11-15 | 2013-02-13 | 陈文根 | Over-voltage protection monitor |
| CN103545796A (en) * | 2013-09-16 | 2014-01-29 | 国家电网公司 | Single-phase grounding fault handling device and method for power distribution network with non-effectively grounded neutral points |
| CN108599748A (en) * | 2018-03-23 | 2018-09-28 | 加码技术有限公司 | A kind of switch element protection circuit, guard method and protective device |
| CN113872172A (en) * | 2020-06-30 | 2021-12-31 | Abb瑞士股份有限公司 | Device for overvoltage protection of subsea electrical equipment and method for operating the same |
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| JPH06284562A (en) * | 1993-03-25 | 1994-10-07 | Ngk Insulators Ltd | Protection device for electric power transmission system |
| CN2424559Y (en) * | 2000-03-18 | 2001-03-21 | 重庆大学 | Device for fast regulating arc-extinguishing coil |
| CN2590234Y (en) * | 2002-12-17 | 2003-12-03 | 徐成飞 | Microcomputer arc extinguishing, wire selecting and excess voltage comprehensive protector |
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| CN2884641Y (en) * | 2006-04-08 | 2007-03-28 | 张树仁 | Overvoltage limit and small current earthing selective integrator of power transfer and distribution system |
| CN101071146A (en) * | 2007-06-14 | 2007-11-14 | 思源电气股份有限公司 | Phase-controlled arc-extinguishing coil fault detecitng method |
| CN201018279Y (en) * | 2007-02-14 | 2008-02-06 | 徐成飞 | Arc extinguishing and over-voltage protection device |
| CN101183788A (en) * | 2007-12-11 | 2008-05-21 | 广州智光电气股份有限公司 | Power network controlled reactance and small resistor combination type earthing device |
| CN201312112Y (en) * | 2008-12-03 | 2009-09-16 | 徐成飞 | Overvoltage monitoring and comprehensive protective device for medium voltage power network |
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH06284562A (en) * | 1993-03-25 | 1994-10-07 | Ngk Insulators Ltd | Protection device for electric power transmission system |
| CN2424559Y (en) * | 2000-03-18 | 2001-03-21 | 重庆大学 | Device for fast regulating arc-extinguishing coil |
| CN2590234Y (en) * | 2002-12-17 | 2003-12-03 | 徐成飞 | Microcomputer arc extinguishing, wire selecting and excess voltage comprehensive protector |
| CN2779700Y (en) * | 2004-12-23 | 2006-05-10 | 上海思源电气股份有限公司 | Non-harmonic phase-control type fast arc-extinguishing and wire-selecting device |
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| CN201018279Y (en) * | 2007-02-14 | 2008-02-06 | 徐成飞 | Arc extinguishing and over-voltage protection device |
| CN101071146A (en) * | 2007-06-14 | 2007-11-14 | 思源电气股份有限公司 | Phase-controlled arc-extinguishing coil fault detecitng method |
| CN101183788A (en) * | 2007-12-11 | 2008-05-21 | 广州智光电气股份有限公司 | Power network controlled reactance and small resistor combination type earthing device |
| CN201312112Y (en) * | 2008-12-03 | 2009-09-16 | 徐成飞 | Overvoltage monitoring and comprehensive protective device for medium voltage power network |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931650A (en) * | 2012-11-15 | 2013-02-13 | 陈文根 | Over-voltage protection monitor |
| CN103545796A (en) * | 2013-09-16 | 2014-01-29 | 国家电网公司 | Single-phase grounding fault handling device and method for power distribution network with non-effectively grounded neutral points |
| CN108599748A (en) * | 2018-03-23 | 2018-09-28 | 加码技术有限公司 | A kind of switch element protection circuit, guard method and protective device |
| CN108599748B (en) * | 2018-03-23 | 2022-04-22 | 加码技术有限公司 | Switch element protection circuit, protection method and protection device |
| CN113872172A (en) * | 2020-06-30 | 2021-12-31 | Abb瑞士股份有限公司 | Device for overvoltage protection of subsea electrical equipment and method for operating the same |
| CN113872172B (en) * | 2020-06-30 | 2024-03-26 | Abb瑞士股份有限公司 | Device for overvoltage protection of subsea electrical equipment and method for operating the same |
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Addressee: Xu Chengfei Document name: Notification of Publication of the Application for Invention |
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Application publication date: 20120516 |