CN103762547A - Modular high-voltage vacuum direct current on-off device based on artificial zero crossing - Google Patents

Modular high-voltage vacuum direct current on-off device based on artificial zero crossing Download PDF

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Publication number
CN103762547A
CN103762547A CN201410008396.4A CN201410008396A CN103762547A CN 103762547 A CN103762547 A CN 103762547A CN 201410008396 A CN201410008396 A CN 201410008396A CN 103762547 A CN103762547 A CN 103762547A
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CN
China
Prior art keywords
circuit
breaker
direct current
modular
vacuum
Prior art date
Application number
CN201410008396.4A
Other languages
Chinese (zh)
Inventor
史宗谦
张营奎
贾申利
宋晓川
王立军
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西安交通大学
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Application filed by 西安交通大学 filed Critical 西安交通大学
Priority to CN201410008396.4A priority Critical patent/CN103762547A/en
Publication of CN103762547A publication Critical patent/CN103762547A/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
    • H—ELECTRICITY
    • H01—BASIC ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
    • H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for interrupting dc
    • H—ELECTRICITY
    • H01—BASIC ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/541—Contacts shunted by semiconductor devices
    • H01H9/542—Contacts shunted by static switch means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order

Abstract

The invention provides a modular high-voltage vacuum direct current on-off device based on artificial zero crossing. The modular high-voltage vacuum direct current on-off device based on the artificial zero crossing comprises current converting branches and a main circuit breaker formed by a plurality of identical modules, wherein the current converting branches are connected with the main circuit breaker in parallel, and each module is formed by a single-fracture vacuum breaker, a lighting arrester and a voltage-sharing circuit in parallel connection. According to the modular high-voltage vacuum direct current on-off device based on the artificial zero crossing, the main circuit breaker is formed by connecting the modules in series, the problem that existing medium-low-voltage single-fracture vacuum breakers are difficult to apply in the high-voltage vacuum direct current on-off technology based on the artificial zero crossing is solved, and the single-fracture vacuum breakers can be expanded in higher voltage levels.

Description

Modular high pressure vacuum direct current breaking device based on artificial zero passage

Technical field

The high voltage direct current the present invention relates in power industry is cut-off technology, is specifically related to a kind of modular high pressure vacuum direct current breaking device based on artificial zero passage.

Background technology

Artificial zero passage technology is the main method that direct current cut-offs.The basic principle that vacuum direct current based on artificial zero passage cut-offs technology is: a converting capacitor C by precharge in parallel at main vacuum circuit-breaker VCB two ends, the change of current branch road that converter reactor L and commutation switch S form, while cut-offfing, closed commutation switch S, the converting capacitor C of precharge produces the reverse concussion electric current I 1 of superposition in main vacuum circuit-breaker VCB electric current I by converter reactor L and commutation switch S, make main vacuum circuit-breaker VCB electric current form " artificial zero crossing " and extinguish, in DC circuit breaker interrupting process, can produce certain switching overvoltage, cause the lightning arrester MOV action in parallel with DC circuit breaker, after lightning arrestor movement, absorb energy, completing circuit cut-offs.The main vacuum circuit-breaker that the existing vacuum direct current based on artificial zero passage cut-offs in technology all adopts single break structure, mainly in the low-voltage and medium voltage direct current field of cut-offfing, has obtained research and application.

Document < < The Basic Investigation of the High-speed VCB and Its application for the DC Power System > > has introduced speed vacuum circuit breaker and has cut-off the application in technology at direct current, but electric pressure is lower in document, main circuit breaker adopts single break vacuum circuit-breaker.

In document < < Relationship Between the Voltage Distribution Ratio and the Post Arc Current in Double-Break Vacuum Circuit Breakers > >, studied the series characteristic of two vacuum interrupters, but for be that it exchanges break performance, in literary composition, adopted the mode of parallel equalizing capacitor all to press two vacuum interrupters, but after vacuum interrupter arc, in media recovery process there is the higher-order of oscillation in recovery voltage.

In the optically controlled modular multi-break vacuum circuit-breaker technology > > of document < < based on permanent-magnet manipulating mechanism, introduce a kind of design of the single break vacuum breaker moduleization for AC system, can connect corresponding number to form the AC vacuum circuit-breaker of voltage levels according to the needs of electric pressure.Each module series connection mode of all pressing mode Ye Weibing the United Nations General Assembly electric capacity used, if this module application is cut-off in technology in artificial zero passage direct current, after arc, main fracture of medium recovery stage two ends recovery voltage there will be higher-order of oscillation problem.

Summary of the invention

The object of the present invention is to provide a kind of modular high pressure vacuum direct current breaking device based on artificial zero passage.

For achieving the above object, the present invention has adopted following technical scheme.

A kind of modular high pressure vacuum direct current breaking device based on artificial zero passage, comprise change of current branch road and the main circuit breaker being composed in series by a plurality of identical modules, described change of current branch road is in parallel with described main circuit breaker, and described module is composed in parallel by single break vacuum circuit-breaker, lightning arrester and equalizer circuit.

Described equalizer circuit is RC absorbing circuit or RCD absorbing circuit or single equalizing capacitance.

Described single break vacuum circuit-breaker adopts electromagnetic repulsion force system and permanent magnetic system coupled self-adapting control mechanism, during short circuit, electromagnetic repulsion force system action in single break vacuum circuit-breaker, main circuit breaker is opened, during cutting load, permanent magnet system action in single break vacuum circuit-breaker, opens main circuit breaker.

A kind of modular high pressure vacuum direct current breaking device based on artificial zero passage, comprise change of current branch road, lightning arrester and the main circuit breaker being composed in series by a plurality of identical modules, described change of current branch road and lightning arrester are in parallel with described main circuit breaker, and described module is composed in parallel by single break vacuum circuit-breaker and equalizer circuit.

Described equalizer circuit is RC absorbing circuit or RCD absorbing circuit.

Described single break vacuum circuit-breaker adopts electromagnetic repulsion force system and permanent magnetic system coupled self-adapting control mechanism, during short circuit, electromagnetic repulsion force system action in single break vacuum circuit-breaker, main circuit breaker is opened, during cutting load, permanent magnet system action in single break vacuum circuit-breaker, opens main circuit breaker.

Compared with prior art, beneficial effect of the present invention is embodied in:

The present invention adopts multimode to be composed in series main circuit breaker, solved existing in, low pressure single break vacuum circuit-breaker is difficult to the problem of applying in the high pressure vacuum direct current based on artificial zero passage cut-offs technology, and single break vacuum circuit-breaker can be expanded to voltage levels more.

Further, in the present invention, equalizer circuit adopts RC absorbing circuit or RCD absorbing circuit, has solved the problem that artificial zero passage vacuum direct current cut-offs the middle main circuit breaker recovery voltage higher-order of oscillation.

Accompanying drawing explanation

Fig. 1 is that the vacuum direct current based on artificial zero passage cut-offs the schematic diagram of the basic principle of technology;

Fig. 2 a is the structural representation (equalizer circuit is RC absorbing circuit) that the present invention forms the individual module of main circuit breaker;

Fig. 2 b is the structural representation (equalizer circuit is RCD absorbing circuit) that the present invention forms the individual module of main circuit breaker;

Fig. 3 a is the modular high pressure vacuum direct current breaking device structural representation based on artificial zero passage described in the embodiment of the present invention 1;

Fig. 3 b is the modular high pressure vacuum direct current breaking device structural representation based on artificial zero passage described in the embodiment of the present invention 2;

Fig. 4 is for adopting electric capacity as the waveform of all pressing main circuit breaker current over-zero stage main circuit breaker two ends recovery voltage and electric current after branch road; (main circuit breaker is composed in series by four modules, electric pressure 100kV)

Fig. 5 is for adopting RC absorbing circuit as the waveform of all pressing main circuit breaker current over-zero stage main circuit breaker two ends recovery voltage and electric current after branch road; (main circuit breaker is composed in series by four modules, and electric pressure is 100kV)

Fig. 6 is for adopting RCD absorbing circuit as the waveform of all pressing main circuit breaker current over-zero stage main circuit breaker two ends recovery voltage and electric current after branch road.(main circuit breaker is composed in series by four modules, and electric pressure is 100kV)

Embodiment

Below in conjunction with drawings and Examples, invention is elaborated.

The main circuit breaker that the present invention cut-offs the high pressure vacuum direct current based on artificial zero passage in technology is designed to the form that a plurality of modules are connected.According to the connect module of required number of electric pressure, form main circuit breaker.

Embodiment 1

Modular high pressure vacuum direct current breaking device based on artificial zero passage, comprises change of current branch road and the main circuit breaker being comprised of a plurality of identical modules, the parallel connection that each module comprises three branch roads, and referring to Fig. 2 a, three branch roads are respectively lightning arrester MOV n, single break vacuum circuit-breaker SVCB nwith RC absorbing circuit, RC absorbing circuit is by resistance R nand capacitor C nbe composed in series (n=1,2 ..., N), the equalizer circuit that the RC absorbing circuit comprising in individual module is also connected as a plurality of modules.RC absorbing circuit in three branch roads also can adopt RCD absorbing circuit to replace, and referring to Fig. 2 b, RCD absorbing circuit can be selected resistance R n, capacitor C nand diode D nform diode D nwith resistance R ncircuit after parallel connection and capacitor C nseries connection; Or also can adopt electric capacity to replace RC absorbing circuit.

Referring to Fig. 3 a, main circuit breaker is composed in series by the module shown in Fig. 2 a, the required number of modules N that connects is determined by applied voltage grade, change of current branch road formation in parallel with the described main circuit breaker modular high pressure vacuum direct current breaking device based on artificial zero passage of the present invention, wherein, the change of current is propped up route commutation switch S, converter reactor L and converting capacitor C is composed in series.

The operation principle of the modular high pressure vacuum direct current breaking device based on artificial zero passage, is divided into following step:

While cut-offfing, open main circuit breaker (all opening the single break vacuum circuit-breaker in all modules simultaneously), when the total electrode of main circuit breaker is opened when reaching the distance of setting, closed commutation switch S, the converting capacitor C of precharge produces the reverse concussion electric current I 1 of superposition in main circuit breaker electric current I by converter reactor L and commutation switch S, make the single break vacuum circuit-breaker electric current formation " artificial zero crossing " of each module in main circuit breaker and extinguish, in direct current breaking device interrupting process, can produce certain switching overvoltage, cause lightning arrestor movement in each module, after lightning arrestor movement, absorb energy, completing electric current cut-offs.

Advantage of the present invention:

1) the present invention composes in parallel module by single break vacuum circuit-breaker, lightning arrester and RC absorbing circuit or RCD absorbing circuit or single equalizing capacitance, in the high pressure vacuum direct current based on artificial zero passage cut-offs technology, apply convenient, in application, only module directly need be connected, not need to redesign equalizer circuit and lightning arrester.

2) the RC absorbing circuit comprising in each module of the present invention or RCD absorbing circuit are as the equalizer circuit of a plurality of module series connection, compare with the equalizer circuit of connecting as a plurality of single break vacuum circuit-breakers at single break vacuum circuit-breaker two ends shunt capacitance, effectively suppressed in interrupting process the higher-order of oscillation of medium recovery stage main circuit breaker two ends recovery voltage after arc, be conducive to medium recovery after the arc of main circuit breaker, simulation result is as shown in Fig. 4, Fig. 5 and Fig. 6.

The result of all pressing for each single break vacuum circuit-breaker two ends shunt capacitance, referring to Fig. 4, finds out from the waveform of main circuit breaker current over-zero stage main circuit breaker two ends recovery voltage and electric current, and now vibration has occurred recovery voltage.The result of all pressing for each single break vacuum circuit-breaker two ends RC absorbing circuit in parallel is referring to Fig. 5, from the waveform of main circuit breaker current over-zero stage main circuit breaker two ends recovery voltage and electric current, find out, main circuit breaker two ends recovery voltage vibration situation has obtained obvious inhibition.The result of all pressing for each single break vacuum circuit-breaker two ends RCD absorbing circuit in parallel is referring to Fig. 6, from the waveform of main circuit breaker current over-zero stage main circuit breaker two ends recovery voltage and electric current, find out, main circuit breaker two ends recovery voltage vibration situation has obtained obvious inhibition.Equalizer circuit adopts RC absorbing circuit or RCD absorbing circuit the inhibition of main circuit breaker two ends recovery voltage vibration to be obviously better than adopting the situation of electric capacity.

Embodiment 2

Modular high pressure vacuum direct current breaking device based on artificial zero passage, referring to Fig. 3 b, comprises change of current branch road, lightning arrester and the main circuit breaker being comprised of a plurality of identical modules, and described change of current branch road and lightning arrester are in parallel with described main circuit breaker.The parallel connection that each module comprises two branch roads, two branch roads are respectively single break vacuum circuit-breaker SVCB nwith RC absorbing circuit, RC absorbing circuit is by resistance R nand capacitor C nbe composed in series (n=1,2 ..., N), the equalizer circuit that the RC absorbing circuit comprising in individual module is also connected as a plurality of modules.RC absorbing circuit in two branch roads also can adopt RCD absorbing circuit to replace.

Because the effect of lightning arrester is the peak value of restriction main circuit breaker two ends recovery voltage, so can adopt the lightning arrester mounting means of embodiment 2, reach the effect identical with embodiment 1, simultaneously, the control mode of embodiment 2 is also identical with embodiment 1, and RC absorbing circuit or RCD absorbing circuit also can be brought into play the inhibitory action to the vibration of main circuit breaker two ends recovery voltage.

In embodiment 1 and embodiment 2, single break vacuum circuit-breaker preferably has the single break vacuum circuit-breaker (open in Chinese patent application 200810150067.8) of electromagnetic repulsion force system and permanent magnetic system coupled self-adapting control mechanism, but also can adopt other existing single break vacuum circuit-breakers.

Claims (6)

1. the modular high pressure vacuum direct current breaking device based on artificial zero passage, it is characterized in that: comprise change of current branch road and the main circuit breaker being composed in series by a plurality of identical modules, described change of current branch road is in parallel with described main circuit breaker, and described module is composed in parallel by single break vacuum circuit-breaker, lightning arrester and equalizer circuit.
2. a kind of modular high pressure vacuum direct current breaking device based on artificial zero passage according to claim 1, is characterized in that: described equalizer circuit is RC absorbing circuit or RCD absorbing circuit or single equalizing capacitance.
3. a kind of modular high pressure vacuum direct current breaking device based on artificial zero passage according to claim 1, it is characterized in that: described single break vacuum circuit-breaker adopts electromagnetic repulsion force system and permanent magnetic system coupled self-adapting control mechanism, during short circuit, electromagnetic repulsion force system action in single break vacuum circuit-breaker, main circuit breaker is opened, during cutting load, the permanent magnet system action in single break vacuum circuit-breaker, opens main circuit breaker.
4. the modular high pressure vacuum direct current breaking device based on artificial zero passage, it is characterized in that: comprise change of current branch road, lightning arrester and the main circuit breaker being composed in series by a plurality of identical modules, described change of current branch road and lightning arrester are in parallel with described main circuit breaker, and described module is composed in parallel by single break vacuum circuit-breaker and equalizer circuit.
5. a kind of modular high pressure vacuum direct current breaking device based on artificial zero passage according to claim 4, is characterized in that: described equalizer circuit is RC absorbing circuit or RCD absorbing circuit.
6. a kind of modular high pressure vacuum direct current breaking device based on artificial zero passage according to claim 4, it is characterized in that: described single break vacuum circuit-breaker adopts electromagnetic repulsion force system and permanent magnetic system coupled self-adapting control mechanism, during short circuit, electromagnetic repulsion force system action in single break vacuum circuit-breaker, main circuit breaker is opened, during cutting load, the permanent magnet system action in single break vacuum circuit-breaker, opens main circuit breaker.
CN201410008396.4A 2014-01-08 2014-01-08 Modular high-voltage vacuum direct current on-off device based on artificial zero crossing CN103762547A (en)

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CN201410008396.4A CN103762547A (en) 2014-01-08 2014-01-08 Modular high-voltage vacuum direct current on-off device based on artificial zero crossing
PCT/CN2014/081628 WO2015103857A1 (en) 2014-01-08 2014-07-04 Modular high-voltage vacuum direct-current breaking device based on artificial zero-crossing

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US10910817B2 (en) * 2014-09-26 2021-02-02 Mitsubishi Electric Corporation DC circuit breaker

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FR3091407A1 (en) * 2018-12-27 2020-07-03 Supergrid Institute Current cut-off device for high-voltage direct current with capacitive buffer circuit and control method
FR3091408B1 (en) * 2018-12-27 2021-01-15 Supergrid Inst High voltage direct current cut-off device with adaptive oscillation circuit and control method

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US10910817B2 (en) * 2014-09-26 2021-02-02 Mitsubishi Electric Corporation DC circuit breaker

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Application publication date: 20140430