CN108306266A - A kind of hybrid dc circuit breaker and its control method with reclosing module - Google Patents
A kind of hybrid dc circuit breaker and its control method with reclosing module Download PDFInfo
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- CN108306266A CN108306266A CN201810227858.XA CN201810227858A CN108306266A CN 108306266 A CN108306266 A CN 108306266A CN 201810227858 A CN201810227858 A CN 201810227858A CN 108306266 A CN108306266 A CN 108306266A
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- Prior art keywords
- branch
- current
- reclosing
- failure
- voltage
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency 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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised 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
-
- 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
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- 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
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Direct Current Feeding And Distribution (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of hybrid dc circuit breaker and its control method with reclosing module, conventional hybrid formula direct-current breaker topology include through-flow branch, cutout branch and energy consumption branch；The present invention is improved for conventional topologies, by the way that reclosing module is added in the branch that stops, so that breaker is having flexible reclosing ability and can be limited current in the reasonable scope during reclosing after cut-offfing fault current, impact of the reclosing process to power grid is reduced, electric current is excessive when preventing reclosing from coinciding with failure in the process causes secondary damage to system.
Description
Technical field
It is especially a kind of hybrid straight with reclosing module the present invention relates to dc circuit breaker field in direct current transportation
Flow breaker and its control method.
Background technology
Flexible DC power transmission was quickly grown in recent years, the direct current interruption needed for flexible DC power transmission and DC grid protection
Device becomes research hotspot therewith.In overhead transmission line DC grid, most of failure is all transient fault.In order to improve transmission of electricity
Reliability, dc circuit breaker do not need only to have the ability of quick-speed turning on-off DC current, it is also necessary to after cut-offfing fault current
With reclosing ability.
In current dc circuit breaker scheme, most application prospect is exactly hybrid dc circuit breaker.Numerous mixing
There is a little difference between formula direct-current breaker topology structure, but all there are three branches jointly：Through-flow branch, is opened by machinery
It closes and auxiliary switch is constituted, wherein auxiliary switch is formed by a small amount of wholly-controled device connection in series-parallel, is mainly used for fault current transfer；
Stop branch：It is formed by a large amount of wholly-controled device connection in series-parallel, is cut-off for fault current；Consume energy branch：It is made of arrester group,
For absorbing the DC grid dump energy after breaker is cut-off.The many topologys of traditional hybrid dc circuit breaker are most of
Do not have reclosing ability, if some breakers for having reclosing ability coincide with failure then reclosing electricity in reclosing
Stream can be very big, can cause secondary damage to power grid.
Application No. is 201610245174.3 Chinese patent applications " a kind of direct current cutoff device and its control method " to change
Into hybrid dc circuit breaker, although reclosing process may be implemented, reclosing module in parallel is largely using full control
Device considerably increases the investment of dc circuit breaker.
Therefore the topology for how improving hybrid dc circuit breaker, ensures it in the premise that will not increase significantly cost of investment
Under, have the function of that flexible reclosing is the important content in dc circuit breaker design, limitation coincides with overcurrent when failure, subtracts
Few impact of the reclosing process to power grid, is of great significance to security of system.
Invention content
Technical problem to be solved by the invention is to provide a kind of hybrid dc circuit breaker with reclosing module and
Its control method improves hybrid dc circuit breaker under the premise of not dramatically increasing cost of investment so that it has flexible weight
Combined floodgate ability reduces the overcurrent during reclosing, reduces impact of the reclosing process to power grid.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of hybrid dc circuit breaker with reclosing module includes logical with mechanical switch K1 and auxiliary switch
Branch, the cutout branch with main switch and the energy consumption branch with arrester group are flowed, weight of connecting in the cutout branch
Combined floodgate module, the reclosing module are formed in parallel by mechanical switch K2 and current-limiting resistance R, the resistance value of the current-limiting resistance R：
Wherein：VNFor system nominal voltage, INFor system nominal running current, VmFor through-flow branch auxiliary switch module institute
The maximum transient voltage that can be born, α are the coefficient less than 1.
Further, α=0.9.
A kind of control method of the hybrid dc circuit breaker with reclosing module, includes the following steps：
1) when normal operation, through-flow branch conducting, the main switch locking for the branch that stops, the mechanical switch K2 of reclosing module
It is closed；
2) failure on-off process：
201, the main switch for opening cutout branch, is latched the auxiliary switch of through-flow branch, is completely transferred to stop in electric current
After branch, the mechanical switch K1 of through-flow branch is disconnected；
202, after the mechanical switch K1 completion of through-flow branch is cut-off, the main switch of locking cutout branch, dump energy by
The arrester group of energy consumption branch absorbs；
203, after the electric current of cutout branch is reduced to zero, the mechanical switch K2 of reclosing module is disconnected；
3) reclosing process：
301, reclosing order is received, is closed the main switch of cutout branch immediately；
302, the electrical quantity of faulty line at this time is detected, whether failure judgement exists：If A, failure exists,
The main switch of cutout branch is cut-off, dump energy is absorbed by energy consumption branch, and reclosing terminates；If B, failure has been cleared by, into
Enter step 303；
303, the mechanical switch K1 for closing through-flow branch, opens the auxiliary switch of through-flow branch；Disconnect the master of cutout branch
Switch is closed the mechanical switch K2 of reclosing module, and reclosing terminates, into normal operating condition.
Further, in step 302, the electrical quantity that whether failure judgement exists includes：A, on electric current at this time
The rate of liter；B, the voltage on failure side line road；C, the voltage at the both ends current-limiting resistance R of reclosing module.
Further, when carrying out failure judgement with current-rising-rate at this time and whether existing, if coinciding with fault clearance
State, then current-rising-rate be：
If coinciding with failure, current-rising-rate is：
In formula, VNFor system nominal voltage, INFor system nominal running current, L is system inductance amount, and R is current-limiting resistance R
Resistance value, RfFor fault resstance.
Further, when carrying out failure judgement with the voltage on failure side line road and whether existing, if coinciding with fault clearance
State, then the voltage V of fault wire tracksideLFor：
If coinciding with failure, the voltage V of fault wire tracksideLFor：
In formula, VNFor system nominal voltage, INFor system nominal running current, R is the resistance value of current-limiting resistance R, RfFor failure
Resistance.
Further, when carrying out failure judgement with the voltage at the both ends current-limiting resistance R of reclosing module and whether existing, if
Coincide with fault clearance state, then in reclosing module resistance both ends voltage VRFor：
If coinciding with failure, the voltage V at resistance both ends in reclosing moduleRFor：
In formula, VNFor system nominal voltage, INFor system nominal running current, R is the resistance value of current-limiting resistance R, RfFor failure
Resistance.
Compared with prior art, the beneficial effects of the invention are as follows：1, the present invention passes through in the disconnected of hybrid dc circuit breaker
It connects into reclosing module in stream branch so that hybrid dc circuit breaker is provided with flexible reclosing ability；2, institute of the present invention
The reclosing module of offer is formed in parallel by current-limiting resistance and mechanical switch, cost of investment very little, and it is disconnected will not to dramatically increase direct current
The investment of road device；3, reclosing module and its control method provided by the present invention can make hybrid dc circuit breaker in weight
Electric current is limited in zone of reasonableness when combined floodgate, it is therefore prevented that the secondary damage of power grid when coinciding with failure.4, institute of the present invention
In the reclosing module and its control method of offer, all mechanical switch of breaker are all that no arc acts, and are conducive to breaker
Long-term be used for multiple times.
Description of the drawings
Fig. 1 is the implementing circuit figure of the hybrid dc circuit breaker with reclosing module in the present invention.
Operational flowchart when Fig. 2 is the hybrid dc circuit breaker disconnection failure with reclosing module in the present invention.
Fig. 3 is operational flowchart of the hybrid dc circuit breaker with reclosing module in reclosing in the present invention.
Specific implementation mode
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
A kind of hybrid dc circuit breaker with reclosing module in the present invention as shown in Figure 1, reclosing module by limiting
Leakage resistance R and mechanical switch K2 are formed in parallel, and current-limiting resistance R is used for limiting electric current, mechanical switch K2 during reclosing
In the switching of resistance.Mechanical switch K2 is kept closed in normal operation and interrupting process, bypass current-limiting resistance R.It is receiving
After reclosing order, disconnects mechanical switch K2 and put into current-limiting resistance R, series limiting resistor R enters power grid to limit reclosing mistake
Journey transient current.The calculation of current-limiting resistance R is：
Wherein：VNFor system nominal voltage, INFor system nominal running current, VmFor through-flow branch auxiliary switch module institute
The maximum transient voltage that can be born, α are that the coefficient less than 1 is recommended as 0.9 as safety margin.
A kind of control method of hybrid dc circuit breaker is as follows in the present invention：
One, when normal operation, the mechanical switch K1 and auxiliary switch of through-flow branch are connected, and the main switch for the branch that stops is disconnected
It opens, the mechanical switch K2 of reclosing module is closed；Steady-state current flows through the mechanical switch K1 and auxiliary switch of through-flow branch, wherein
Auxiliary switch is formed by a small amount of full-control type semiconductor switch device connection in series-parallel, can be bridge-type knot commonly used in the prior art
Structure or other through-flow modules.
Two, failure on-off process is as shown in Figure 2：
1, the main switch for opening cutout branch, disconnects the auxiliary switch of through-flow branch, and cutout branch is completely transferred in electric current
After road, the mechanical switch K1 of through-flow branch is disconnected, electric current is all transferred in cutout branch at this time；
2, after the mechanical switch K1 completions of through-flow branch are cut-off, the main switch of cutout branch is disconnected, dump energy is by consuming
Energy branch absorbs, and energy consumption branch routing arrester group is constituted；
3, the mechanical switch K3 of reclosing module is disconnected.
Three, reclosing process is as shown in Figure 3：
1, reclosing order is received, the main switch of cutout branch is closed, the current-limiting resistance R of reclosing module is connected at this time
Enter power grid, coincidence brake current can be limited, electric current when preventing from coinciding with failure is excessive, and secondary damage is caused to power grid；
2, whether the electrical quantity such as faulty line voltage and current, failure judgement exist at this time for detection, and whether failure judgement
The electrical quantity to exist can be any one following：1) current-rising-rate at this time；2) voltage on failure side line road；3)
Voltage in reclosing module above current-limiting resistance R.
The calculation of above-mentioned electrical quantity is：
A, current-rising-rate：
If coinciding with fault clearance state, current-rising-rate is：
If coinciding with failure, current-rising-rate is：
In formula, VNFor system nominal voltage, INFor system nominal running current, L is system inductance amount, RfFor fault resstance.
B, the voltage on failure side line road：
If coinciding with fault clearance state, the voltage of fault wire trackside is：
If coinciding with failure, the voltage of fault wire trackside is：
In formula, VNFor system nominal voltage, INFor system nominal running current, RfFor fault resstance.
C, in reclosing module resistance both ends voltage：
If coinciding with fault clearance state, the voltage V at resistance both ends in reclosing moduleRFor：
If coinciding with failure, the voltage V at resistance both ends in reclosing moduleRFor：
In formula, VNFor system nominal voltage, INFor system nominal running current, RfFor fault resstance.
(1) if failure exists：It is then latched the main switch of cutout branch, dump energy is absorbed by energy consumption branch, is overlapped
Lock terminates；
(2) if failure has been cleared by：It is then first closed the mechanical switch of through-flow branch, the auxiliary for reclosing through-flow branch is opened
It closes, the main switch of locking cutout branch, branch current to be stopped is reduced to after 0, is closed the mechanical switch K2 of reclosing module, weight
Combined floodgate terminates, into normal operating condition.
Claims (7)
- Include through-flow with mechanical switch K1 and auxiliary switch 1. a kind of hybrid dc circuit breaker with reclosing module Branch, the cutout branch with main switch and the energy consumption branch with arrester group, which is characterized in that in the cutout branch Middle series connection reclosing module, the reclosing module are formed in parallel by mechanical switch K2 and current-limiting resistance R, the current-limiting resistance R Resistance value：Wherein：VNFor system nominal voltage, INFor system nominal running current, VmIt can be held for through-flow branch auxiliary switch module The maximum transient voltage received, α are the coefficient less than 1.
- 2. a kind of hybrid dc circuit breaker with reclosing module as described in claim 1, which is characterized in that α= 0.9。
- 3. a kind of control method of the hybrid dc circuit breaker with reclosing module as described in claim 1, feature It is, includes the following steps：1) when normal operation, through-flow branch conducting, the main switch for the branch that stops is latched, and the mechanical switch K2 of reclosing module is closed It closes；2) failure on-off process：201, the main switch for opening cutout branch, is latched the auxiliary switch of through-flow branch, and cutout branch is completely transferred in electric current Later, the mechanical switch K1 of through-flow branch is disconnected；202, after the mechanical switch K1 completions of through-flow branch are cut-off, the main switch of locking cutout branch, dump energy is by consuming energy The arrester group of branch absorbs；203, after the electric current of cutout branch is reduced to zero, the mechanical switch K2 of reclosing module is disconnected；3) reclosing process：301, reclosing order is received, is closed the main switch of cutout branch immediately；302, the electrical quantity of faulty line at this time is detected, whether failure judgement exists：If A, failure exists, cut-off The main switch of cutout branch, dump energy are absorbed by energy consumption branch, and reclosing terminates；If B, failure has been cleared by, into step Rapid 303；303, the mechanical switch K1 for closing through-flow branch, opens the auxiliary switch of through-flow branch；The main switch of cutout branch is disconnected, It is closed the mechanical switch K2 of reclosing module, reclosing terminates, into normal operating condition.
- 4. control method as claimed in claim 3, which is characterized in that in step 302, what whether failure judgement existed Electrical quantity includes：A, current-rising-rate at this time；B, the voltage on failure side line road；C, the both ends current-limiting resistance R of reclosing module Voltage.
- 5. control method as claimed in claim 4, which is characterized in that with current-rising-rate at this time come failure judgement whether after In the presence of continuous, if coinciding with fault clearance state, current-rising-rate is：If coinciding with failure, current-rising-rate is：In formula, VNFor system nominal voltage, INFor system nominal running current, L is system inductance amount, and R is the resistance of current-limiting resistance R Value, RfFor fault resstance.
- 6. control method as claimed in claim 4, which is characterized in that with the voltage on failure side line road come failure judgement whether after In the presence of continuous, if coinciding with fault clearance state, the voltage V of fault wire tracksideLFor：If coinciding with failure, the voltage V of fault wire tracksideLFor：In formula, VNFor system nominal voltage, INFor system nominal running current, R is the resistance value of current-limiting resistance R, RfFor failure electricity Resistance.
- 7. control method as claimed in claim 4, which is characterized in that with the voltage at the both ends current-limiting resistance R of reclosing module When carrying out failure judgement and whether existing, if coinciding with fault clearance state, the voltage V at resistance both ends in reclosing moduleR For：If coinciding with failure, the voltage V at resistance both ends in reclosing moduleRFor：In formula, VNFor system nominal voltage, INFor system nominal running current, R is the resistance value of current-limiting resistance R, RfFor failure electricity Resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810227858.XA CN108306266B (en) | 2018-03-20 | 2018-03-20 | Hybrid direct current breaker with reclosing module and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810227858.XA CN108306266B (en) | 2018-03-20 | 2018-03-20 | Hybrid direct current breaker with reclosing module and control method thereof |
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| CN108306266A true CN108306266A (en) | 2018-07-20 |
| CN108306266B CN108306266B (en) | 2023-06-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167379A (en) * | 2018-09-20 | 2019-01-08 | 四川大学 | The control method for coordinating of flexible direct current system converter station and dc circuit breaker |
| CN109494693A (en) * | 2018-11-16 | 2019-03-19 | 北京交通大学 | A kind of hybrid dc circuit breaker and control method reducing reclosing impact |
| CN110829393A (en) * | 2019-12-02 | 2020-02-21 | 贵州电网有限责任公司 | Current-limiting hybrid direct-current circuit breaker with active protection function and control method |
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| CN105356411A (en) * | 2015-11-10 | 2016-02-24 | 南京南瑞继保电气有限公司 | Bridge circuit, high voltage DC circuit breaker and control method thereof |
| CN105680409A (en) * | 2016-04-19 | 2016-06-15 | 南京南瑞继保电气有限公司 | Bridge circuit, direct current disjunction device and control method thereof |
| CN105790236A (en) * | 2016-04-19 | 2016-07-20 | 南京南瑞继保电气有限公司 | DC turn-off apparatus and control method thereof |
| WO2018028247A1 (en) * | 2016-08-09 | 2018-02-15 | 南京南瑞继保电气有限公司 | Closing control method for high-voltage direct-current circuit breaker |
| CN208015359U (en) * | 2018-03-20 | 2018-10-26 | 四川大学 | A kind of hybrid dc circuit breaker with reclosing module |
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2018
- 2018-03-20 CN CN201810227858.XA patent/CN108306266B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356411A (en) * | 2015-11-10 | 2016-02-24 | 南京南瑞继保电气有限公司 | Bridge circuit, high voltage DC circuit breaker and control method thereof |
| CN105680409A (en) * | 2016-04-19 | 2016-06-15 | 南京南瑞继保电气有限公司 | Bridge circuit, direct current disjunction device and control method thereof |
| CN105790236A (en) * | 2016-04-19 | 2016-07-20 | 南京南瑞继保电气有限公司 | DC turn-off apparatus and control method thereof |
| WO2018028247A1 (en) * | 2016-08-09 | 2018-02-15 | 南京南瑞继保电气有限公司 | Closing control method for high-voltage direct-current circuit breaker |
| CN208015359U (en) * | 2018-03-20 | 2018-10-26 | 四川大学 | A kind of hybrid dc circuit breaker with reclosing module |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167379A (en) * | 2018-09-20 | 2019-01-08 | 四川大学 | The control method for coordinating of flexible direct current system converter station and dc circuit breaker |
| CN109494693A (en) * | 2018-11-16 | 2019-03-19 | 北京交通大学 | A kind of hybrid dc circuit breaker and control method reducing reclosing impact |
| CN110829393A (en) * | 2019-12-02 | 2020-02-21 | 贵州电网有限责任公司 | Current-limiting hybrid direct-current circuit breaker with active protection function and control method |
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