CN106877301A - A kind of high voltage DC breaker and test method - Google Patents

A kind of high voltage DC breaker and test method Download PDF

Info

Publication number
CN106877301A
CN106877301A CN201710245917.1A CN201710245917A CN106877301A CN 106877301 A CN106877301 A CN 106877301A CN 201710245917 A CN201710245917 A CN 201710245917A CN 106877301 A CN106877301 A CN 106877301A
Authority
CN
China
Prior art keywords
branch road
switch
voltage
current
solid
Prior art date
Application number
CN201710245917.1A
Other languages
Chinese (zh)
Inventor
杨艳
杜思杰
欧阳可洲
潘梓清
匡渔
Original Assignee
贵州电网有限责任公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 贵州电网有限责任公司 filed Critical 贵州电网有限责任公司
Priority to CN201710245917.1A priority Critical patent/CN106877301A/en
Publication of CN106877301A publication Critical patent/CN106877301A/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/268Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems

Abstract

The invention discloses a kind of high voltage DC breaker and test method, it is made up of four parallel branch two ends two current-limiting reactors of series connection, this four parallel branch tie points are main branch, and tie point is main branch, are composed in series by quick isolation switch K and auxiliary quick closing valve T0;Second branch road is transfer branch road, is made up of solid-state switch, and the solid-state switch is composed in series by several IGBT modules, and each IGBT module is by two IGBT differential concatenations, and the anti-parallel diodes on each IGBT;The buffer loop that 3rd branch road is made up of resistance and capacitances in series;4th branch road is the energy absorption loop being made up of Zinc-Oxide Arrester, the present invention can realize it is two-way rapidly switch off, and simple structure is easy to make, practical.

Description

A kind of high voltage DC breaker and test method
Technical field
The present invention relates to a kind of dc circuit breaker and test method, especially a kind of high voltage DC breaker and experiment side Method, belongs to technical field of electric power.
Background technology
As economic continues to develop, because fossil energy is exhausted and exploitation difficulty increase, while causing serious ring Border problem.In recent years, the new energy such as solar power generation, fuel cell, wind-power electricity generation obtain large-scale promotion application, same in this When, occur in that a large amount of DC loads such as electric automobile, frequency conversion equipment, LED illuminating lamps, information equipment.And direct-current micro-grid, as The access form of distributed power source and DC load higher efficiency, with line loss it is low, transmission capacity is big, long transmission distance, The quality of power supply is high and the advantages of sex chromosome mosaicism stable in the absence of system synchronization, the development trend as current power system. And dc circuit breaker is the visual plant of direct current micro-grid system, the crucial work of power equipment in fault trip and protection system is played With the dc circuit breaker of shortage practicality at present.
The content of the invention
The purpose of the present invention is:For the power system development trend of development direct-current micro-grid at present, there is provided a kind of direct current breaks Road device scheme, the dc circuit breaker includes current-limiting circuit and four parallel branches connected in series.Current-limiting circuit is by current-limiting inductance Constitute;Tie point is mechanical switch in four parallel branches, and the mechanical switch is used for turning on normal load electric current;Second branch road It is solid-state switch, for turning off bi-directional failure electric current;3rd branch road is buffer loop, is made up of resistance, capacitances in series;4th Road is absorption circuit, is made up of Zinc-Oxide Arrester, for buffering and line inductance energy when absorption is cut-off, reduces solid-state switch Voltage build-up rate and solid switch device is protected not threatened by overvoltage.The dc circuit breaker can realize two-way rapidly switching off.
The technical scheme is that:A kind of high voltage DC breaker, including the first current-limiting reactor, the second current-limiting reactor Device and electric branch circuit, described the first current-limiting reactor, electric branch circuit and the second current-limiting reactor constitute series circuit successively.
Described electric branch circuit includes tie point, the second branch road, the 3rd branch road and the 4th branch road, described first Road, the second branch road, the 3rd branch road and the 4th branch road are parallel connection.
Described tie point is connected by quick isolation switch and auxiliary switch.
The second described branch road includes being composed in series by least one IGBT module;Each IGBT module is anti-by two IGBT To series connection, and the anti-parallel diodes on each IGBT.
The 3rd described routing resistance and capacitances in series are constituted.
The 4th described branch road is the energy absorption loop that Zinc-Oxide Arrester is constituted.
Described auxiliary switch is by two IGBT differential concatenations, and the anti-parallel diodes on each IGBT.
Test method, comprises the following steps:
The first step, closing operation:The solid-state switch T for first triggering the second branch road is turned it on, and and then closes the fast of tie point Fast disconnecting switch K, then auxiliary switch T0 is turned on, it is turned under no-voltage, turn off second after confirming tie point conducting The solid-state switch on road makes its out of service.
Second step:Sub-switching operation:When receiving separating brake order or detecting short circuit current more than action setting value, immediately Send and touch logical second branch road solid-state switch and shut-off tie point auxiliary switch signal, produced when tie point auxiliary switch is turned off Overvoltage force electric current in the second branch road solid-state switch shift, after electric current is transferred to the second branch road solid-state switch completely, Tie point quick isolation switch is disconnected without arc;Cut-off signals are sent then to the second branch road solid-state switch T, its all IGBT valve Group is rapidly switched off.
By adopting the above-described technical solution, compared with prior art, IGBT module is by two power electronics in the present invention Element IGBT differential concatenations, and the anti-parallel diodes on each IGBT, can realize that electric current is two-way and rapidly switch off.First Road and the second branch circuit parallel connection, load current is flowed through when normal by tie point, when switch needs to be switched on or off, Using the second branch road, shunting, pincers pressure are acted in tie point disconnection and closing course, realize tie point disconnected open and close rapidly Close, be capable of achieving it is two-way rapidly switch off, and be lost it is low.Line inductance energy, drop when snubber loop is cut-off for snubber Low solid-state switch voltage build-up rate and solid switch device is protected not threatened by overvoltage.The function of current-limiting reactor is that reduction direct current is short Road current-rising-rate, so as to reduce the requirement to mechanical switch quick-action.Simple structure of the present invention, it is easy to make, it is practical.
Brief description of the drawings
Accompanying drawing 1 is used in the schematic diagram in direct-current micro-grid for the present invention;
Accompanying drawing 2 is schematic structural view of the invention;
It is designated in figure:1st, the first current-limiting reactor, the 2, second current-limiting reactor, 3, quick isolation switch, 4, auxiliary switch, 5, IGBT, 6, diode, 7, solid-state switch, 8, IGBT, 9, diode, 10, resistance, 11, electric capacity, 12, Zinc-Oxide Arrester.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, but not as any limitation of the invention.
As shown in Figure 1, embodiments of the invention:A kind of high voltage DC breaker, by the first current-limiting reactor 1, second Current-limiting reactor 2, quick isolation switch 3, auxiliary switch 4, IGBT 5,8, diode 6,9, solid-state switch 7, resistance 10, electric capacity 11st, Zinc-Oxide Arrester 12 is constituted, the first described current-limiting reactor(1), electric branch circuit and the second current-limiting reactor(2)Successively Composition series circuit.
Described electric branch circuit includes tie point, the second branch road, the 3rd branch road and the 4th branch road, described first Road, the second branch road, the 3rd branch road and the 4th branch road are parallel connection.
Described tie point is connected by quick isolation switch 3 and auxiliary switch 4.
Second described at least one solid-state switch 7 of route is composed in series;Each solid-state switch 7 is anti-by two IGBT 8 To series connection, and the anti-parallel diodes 9 on each IGBT 8.
The 3rd described routing resistance 10 and electric capacity 11 are composed in series.
The 4th described branch road is the energy absorption loop that Zinc-Oxide Arrester 12 is constituted.
Described auxiliary switch 4 is by two differential concatenations of IGBT 5, and the anti-parallel diodes 6 on each IGBT 5.
A kind of high voltage DC breaker of the invention, is made up of four parallel branch two ends two current-limiting reactors of series connection, This four parallel branch tie points are main branch, are composed in series by quick isolation switch K and auxiliary quick closing valve T0, for turning on just Normal load current;Second branch road is transfer branch road, is made up of solid-state switch, and the solid-state switch is by several IGBT module series connection groups Into each IGBT module is by two IGBT differential concatenations, and the anti-parallel diodes on each IGBT, and IGBT module is several According to determined using DC voltage level, the branch road be used for open normal operating current and shut-off bi-directional failure electric current;3rd The buffer loop that road is made up of resistance and capacitances in series, line inductance energy when being cut-off for buffering reduces solid-state switch electricity Pressure climbing;4th branch road is the energy absorption loop being made up of Zinc-Oxide Arrester, line inductance energy when being cut-off for absorbing Amount, protects solid switch device not receive voltage threat.The present invention can realize it is two-way rapidly switch off, and simple structure, making side Just, it is practical.
Wind-power electricity generation, photovoltaic generation, battery, AC and DC load etc. are changed into the direct current of low pressure grade by transverter Pressure, is connected on low-voltage direct bus by dc circuit breaker, and some DC loads can be directly connected to low-voltage direct bus On.Low-voltage direct busbar voltage is boosted by commutator transformer, is connected on middle pressure dc bus by dc circuit breaker.Together When, fuel cell, miniature gas turbine, middle pressure AC and DC load etc. are changed into the DC voltage of middle pressure grade by transverter, lead to Dc circuit breaker is crossed to be connected on middle pressure dc bus.It is middle to press dc bus again by DC/AC transverters, by AC circuit breaker It is connected to AC system.
As shown in Figure 2, the first current-limiting reactor 1, the second current-limiting reactor 2 are wherein described dc circuit breaker structure Current-limiting reactor, reactor does not embody its reactance characteristic in straight-flow system, thus reactance access to straight-flow system just Often operation is without influence, and obvious metering function can be played during failure, it is possible to decrease direct-current short circuit current-rising-rate, so as to reduce right The requirement of mechanical switch quick-action, the two ends that the first current-limiting reactor 1, the second current-limiting reactor 2 are located at solid-state switch can limit Bi-directional failure electric current.What is connected with two current-limiting reactors is four parallel branches, and tie point is main branch, by quickly isolating Switch K and auxiliary switch T0 is composed in series, for turning on normal load electric current;Second branch road is transfer branch road, by solid-state switch T Composition, the solid-state switch is composed in series by several IGBT modules, and IGBT module number is true according to used DC voltage level Fixed, each IGBT module is used for open-minded by two IGBT differential concatenations, and the anti-parallel diodes on each IGBT, the branch road Normal operating current and shut-off bi-directional failure electric current;The buffer loop that 3rd branch road is made up of resistance and capacitances in series, is used for Line inductance energy when buffering is cut-off, reduces solid-state switch voltage build-up rate;4th branch road is made up of Zinc-Oxide Arrester Energy absorption loop, line inductance energy when being cut-off for absorbing protects solid switch device not receive voltage threat.
According to technical scheme, required equipment and component are attached, you can tested, during experiment Tested by the following method:
Closing operation:The solid-state switch T for first triggering the second branch road is turned it on, and and then closes quickly isolating out for tie point K is closed, then turns on auxiliary switch T0, it is turned under no-voltage, confirm that tie point turns off the solid-state of the second branch road after turning on Switch makes its out of service.After the solid-state switch T closures of the second branch road in the presence of current-limiting inductance, DC current is gradually from zero Steady-state value is risen to, that is, current-limiting inductance has the effect for suppressing DC current climbing in combined floodgate initial stage, equivalent to right Making process serves cushioning effect.After making process terminates, dc source powers to the load through tie point, current-limiting inductance Only there is leveling, therefore device on-state voltage drop and the equal very little of loss to DC ripple.
Sub-switching operation:Including normal separating brake and short-circuit separating brake, both operating process are essentially identical, distinguish simply the former disjunction Running current, and the latter's disjunction short circuit current, current-limiting reactor play a part of suppression initial stage short circuit current climbing. When receiving separating brake order or detecting short circuit current and exceed action setting value, send immediately touch logical second branch road solid-state switch and Shut-off tie point auxiliary switch signal.The overvoltage that tie point auxiliary switch is produced when turning off forces electric current to the second branch road Shifted in solid-state switch, after electric current is transferred to the second branch road solid-state switch completely, disconnects tie point without arc and quickly isolate out Close;Cut-off signals are sent then to the second branch road solid-state switch T, its all IGBT valve group is rapidly switched off, resistance, electricity during this Hold and arrester snubber loop automatically engages work, can effectively slow down the drop-out voltage rate of climb, to ensure valve group institute The drop-out voltage for undertaking is in the range of its safety operation area.

Claims (8)

1. a kind of high voltage DC breaker, including the first current-limiting reactor(1), the second current-limiting reactor(2)And electric branch circuit, its It is characterised by:The first described current-limiting reactor(1), electric branch circuit and the second current-limiting reactor(2)Series circuit is constituted successively.
2. a kind of high voltage DC breaker according to claim 1, it is characterised in that:Described electric branch circuit includes first Branch road, the second branch road, the 3rd branch road and the 4th branch road, described tie point, the second branch road, the 3rd branch road and the 4th branch road are It is in parallel.
3. a kind of high voltage DC breaker according to claim 1, it is characterised in that:Described tie point by quickly every Leave pass(3)And auxiliary switch(4)Series connection.
4. a kind of high voltage DC breaker according to claim 1, it is characterised in that:Second described route at least Individual solid-state switch(7)It is composed in series;Each solid-state switch(7)By two IGBT(8)Differential concatenation, and in each IGBT(8)On Anti-parallel diodes(9).
5. a kind of high voltage DC breaker according to claim 1, it is characterised in that:The 3rd described routing resistance (10)And electric capacity(11)It is composed in series.
6. a kind of high voltage DC breaker according to claim 1, it is characterised in that:The 4th described branch road is zinc oxide Arrester(12)The energy absorption loop of composition.
7. a kind of high voltage DC breaker according to claim 3, it is characterised in that:Described auxiliary switch(4)By two Individual IGBT(5)Differential concatenation, and the anti-parallel diodes on each IGBT(6).
8. a kind of test method of high voltage DC breaker, it is characterised in that:Comprise the following steps:
The first step, closing operation:The solid-state switch T for first triggering the second branch road is turned it on, and and then closes the fast of tie point Fast disconnecting switch K, then auxiliary switch T0 is turned on, it is turned under no-voltage, turn off second after confirming tie point conducting The solid-state switch on road makes its out of service;
Second step:Sub-switching operation:When receiving separating brake order or detecting short circuit current more than action setting value, send immediately Touch logical second branch road solid-state switch and shut-off tie point auxiliary switch signal, the mistake that tie point auxiliary switch is produced when turning off Voltage forces current is shifted in the second branch road solid-state switch, after electric current is transferred to the second branch road solid-state switch completely, without arc Tie point quick isolation switch is disconnected, cut-off signals are sent then to the second branch road solid-state switch T, its all IGBT valve group is equal Rapidly switch off.
CN201710245917.1A 2017-04-14 2017-04-14 A kind of high voltage DC breaker and test method CN106877301A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710245917.1A CN106877301A (en) 2017-04-14 2017-04-14 A kind of high voltage DC breaker and test method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710245917.1A CN106877301A (en) 2017-04-14 2017-04-14 A kind of high voltage DC breaker and test method

Publications (1)

Publication Number Publication Date
CN106877301A true CN106877301A (en) 2017-06-20

Family

ID=59162686

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710245917.1A CN106877301A (en) 2017-04-14 2017-04-14 A kind of high voltage DC breaker and test method

Country Status (1)

Country Link
CN (1) CN106877301A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106972479A (en) * 2017-04-21 2017-07-21 贵州电网有限责任公司 The design method and high-low pressure dc circuit breaker of a kind of direct-current grid
CN107834522A (en) * 2017-10-25 2018-03-23 华北电力大学 The sequential of the high voltage DC breaker back-up protection of novel topological structure determines
CN107947106A (en) * 2017-11-27 2018-04-20 武汉船用电力推进装置研究所(中国船舶重工集团公司第七二研究所) A kind of direct current cutting system major loop topological structure
CN108011349A (en) * 2017-12-14 2018-05-08 周方 A kind of two-way no electric arc mixing breaker and its method of work
CN109742740A (en) * 2018-12-19 2019-05-10 华北电力大学 A kind of reciprocal current-limiting type high-voltage direct-current breaker topology of modular type
CN110071487A (en) * 2018-01-22 2019-07-30 伊顿智能动力有限公司 Electric protection circuit arrangement
CN110993402A (en) * 2019-11-08 2020-04-10 北京科技大学 Bidirectional on-off hybrid direct current circuit breaker
WO2020133239A1 (en) * 2018-12-28 2020-07-02 华为技术有限公司 Photovoltaic direct current breaking device
WO2020244015A1 (en) * 2019-06-04 2020-12-10 上海交通大学 Direct current limiter topology suitable for flexible direct current transmission system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203387155U (en) * 2013-06-27 2014-01-08 浙江大学 Current-limiting hybrid direct-current circuit breaker based on power electronic compound switch
CN103618298A (en) * 2013-12-04 2014-03-05 中国科学院电工研究所 High-voltage direct-current breaker
CN104242229A (en) * 2014-10-18 2014-12-24 国家电网公司 Multi-break hybrid direct current breaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203387155U (en) * 2013-06-27 2014-01-08 浙江大学 Current-limiting hybrid direct-current circuit breaker based on power electronic compound switch
CN103618298A (en) * 2013-12-04 2014-03-05 中国科学院电工研究所 High-voltage direct-current breaker
CN104242229A (en) * 2014-10-18 2014-12-24 国家电网公司 Multi-break hybrid direct current breaker

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
康成: "一种含限流限压功能的混合式直流断路器方案", 《中国电机工程学报》 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106972479A (en) * 2017-04-21 2017-07-21 贵州电网有限责任公司 The design method and high-low pressure dc circuit breaker of a kind of direct-current grid
CN106972479B (en) * 2017-04-21 2020-02-14 贵州电网有限责任公司 Design method of direct-current micro-grid and high-low-voltage direct-current circuit breaker
CN107834522A (en) * 2017-10-25 2018-03-23 华北电力大学 The sequential of the high voltage DC breaker back-up protection of novel topological structure determines
CN107947106A (en) * 2017-11-27 2018-04-20 武汉船用电力推进装置研究所(中国船舶重工集团公司第七二研究所) A kind of direct current cutting system major loop topological structure
CN107947106B (en) * 2017-11-27 2019-05-14 武汉船用电力推进装置研究所(中国船舶重工集团公司第七一二研究所) A kind of direct current cutting system major loop topological structure
CN108011349A (en) * 2017-12-14 2018-05-08 周方 A kind of two-way no electric arc mixing breaker and its method of work
CN110071487A (en) * 2018-01-22 2019-07-30 伊顿智能动力有限公司 Electric protection circuit arrangement
CN109742740A (en) * 2018-12-19 2019-05-10 华北电力大学 A kind of reciprocal current-limiting type high-voltage direct-current breaker topology of modular type
WO2020133239A1 (en) * 2018-12-28 2020-07-02 华为技术有限公司 Photovoltaic direct current breaking device
WO2020244015A1 (en) * 2019-06-04 2020-12-10 上海交通大学 Direct current limiter topology suitable for flexible direct current transmission system
CN110993402A (en) * 2019-11-08 2020-04-10 北京科技大学 Bidirectional on-off hybrid direct current circuit breaker

Similar Documents

Publication Publication Date Title
Pang et al. Research on key technology and equipment for Zhangbei 500kV DC grid
Tang et al. Basic topology and key devices of the five-terminal DC grid
CN104052026B (en) For submodule topology and the application thereof of modularization multi-level converter
Hajian et al. Evaluation of semiconductor based methods for fault isolation on high voltage DC grids
CN103972855B (en) A kind of device making circuit bidirectional current disjunction and control method thereof
CN103178486B (en) A kind of dc circuit breaker and cutoff method thereof
CN103280763B (en) A kind of dc circuit breaker and its implementation
CN103219699B (en) High-voltage mixing type direct-current breaker
CN100477439C (en) Switch power supply with overvoltage protection and overvoltage protection method thereof
CN102281014B (en) Multilevel current converter with function of processing direct current fault
CN106602504B (en) A kind of photovoltaic Quick shut-off device and photovoltaic system
US10756535B2 (en) Combined direct current circuit breaker and application method thereof
CN103915808B (en) DC de-icing device based on voltage source converter and its control method
CN103474983B (en) High voltage and great current direct-current circuit breaker and control method thereof
CN105790236B (en) A kind of DC current cutoff device and its control method
CN104900444B (en) The topological structure and its control method of dc circuit breaker
CN103618298A (en) High-voltage direct-current breaker
CN104753044B (en) A kind of hybrid all solid state high voltage direct-current breaker topology structure
CN102938560A (en) Direct-current converter station based on bipolar structure
CN103731059B (en) A kind of two clamped sub-module structure circuit of modularization multi-level converter
Cuzner et al. The status of DC micro-grid protection
CN101242136B (en) Voltage source frequency converter bridge arm direct pass protector for three level integrated gate pole conversion transistor
EP2944006A1 (en) Turbine-based energy generation system with dc output
CN103026603A (en) Converter for HVDC transmission and reactive power compensation
CN104067503A (en) Power converter

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20170620

RJ01 Rejection of invention patent application after publication