CN105811379A - Power supply circuit and power supply method for active hybrid high-voltage direct-current breaker - Google Patents

Power supply circuit and power supply method for active hybrid high-voltage direct-current breaker Download PDF

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Publication number
CN105811379A
CN105811379A CN201410838506.XA CN201410838506A CN105811379A CN 105811379 A CN105811379 A CN 105811379A CN 201410838506 A CN201410838506 A CN 201410838506A CN 105811379 A CN105811379 A CN 105811379A
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CN
China
Prior art keywords
voltage
electric capacity
igct
power supply
breaker
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CN201410838506.XA
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Chinese (zh)
Inventor
刘远
周万迪
罗湘
张升
王成昊
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国家电网公司
国网智能电网研究院
中电普瑞电力工程有限公司
华北电网有限公司
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Priority to CN201410838506.XA priority Critical patent/CN105811379A/en
Publication of CN105811379A publication Critical patent/CN105811379A/en

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Abstract

The invention provides a power supply circuit and a power supply method for an active hybrid high-voltage direct-current breaker. The power supply circuit comprises an IGBT (Insulated Gate Bipolar Translator) switch module, a high-voltage isolating switch module and a direct-current power supply; the anode of the direct-current power supply, the IGBT switch module and the high-voltage isolating switch module are connected in sequence; the cathode of the direct-current power supply and the other end of the high-voltage isolating switch module are separately connected with two ends of a capacitor C of the high-voltage direct-current breaker. According to the technical solution, the power supply circuit is simple in structure, convenient to control and easy to realize, and can satisfy the high-voltage electrical isolating condition of the high-voltage direct-current breaker and meet the energy requirement when the direct-current breaker works.

Description

A kind of active hybrid high voltage DC breaker power supply circuits and method of supplying power to
Technical field
The present invention relates to a kind of power supply circuits and method of supplying power to, in particular to a kind of power supply circuits for charging to the high potential electric capacity of active hybrid high voltage DC breaker and method of supplying power to.
Background technology
Dc circuit breaker is one of electric equipments of DC converter station.It not only can be switched off and on high-tension line and various zero load and load current when system is properly functioning; and when system jam; various overload and short circuit current can automatically, rapidly, be reliably excised, it is prevented that the expansion of accident scope by the effect of protective relaying device.
Active hybrid high voltage DC breaker in dc circuit breaker because its power electronic devices quantity is few, control simple, disjunction fault current required time is few, can the advantages such as the fault current amplitudes of disjunction is big, and be used widely;
Active hybrid high voltage DC breaker, when the system failure occurs, is realize mechanical switch thick-less vane by electric capacity C to the electric discharge of Fast mechanical switch branch road, thus disjunction fault current;This just requires to have on electric capacity C enough energy and voltage;It is thus desirable to charge to electric capacity C;
Existing active hybrid high voltage DC breaker is when charging to electric capacity C, directly DC source is connected to electric capacity two ends, after charging complete, completely cut through the connection of power supply and electric capacity, this charging modes exists following not enough: 1) electric capacity stores energy can increase in time and reduce, and capacitive energy can not effectively feed in time, when system jam, may result in electric capacity C can not timely and effective electric discharge disjunction fault current, and cause damage to power system;2) not possessing high_voltage isolation function, when network system fault, when causing electric capacity two ends back-pressure, the high back voltage at electric capacity two ends may be applied directly on earth potential power supply, causes and electrically punctures, and causes insulation fault.
Summary of the invention
In order to solve above-mentioned deficiency existing in prior art, the present invention provides a kind of active hybrid high voltage DC breaker power supply circuits and method of supplying power to.
Present invention provide the technical scheme that a kind of active hybrid high voltage DC breaker power supply circuits, it thes improvement is that: described power supply circuits include IGBT switch module, high voltage isolator module and DC source;The positive pole of described DC source, described IGBT switch module, described high voltage isolator module are sequentially connected with, and the negative pole of described DC source and the other end of described high voltage isolator module are connected with the electric capacity C two ends of described high voltage DC breaker respectively.
Preferably, described high voltage DC breaker includes Fast mechanical switch, power electronic devices, diode A, diode B, inductance L, described electric capacity C, IGCT A, IGCT B;
One end of described Fast mechanical switch is connected with one end of power electronic devices, and its other end is connected with the anode of the negative electrode of described diode A and described IGCT A respectively;The other end of described power electronic devices is connected with the anode of the negative electrode of described diode B and described IGCT B respectively;
The anode of described diode A is connected with one end of the anode of described diode B and described inductance L respectively;The other end of described inductance L is connected with one end of described electric capacity C, and the other end of described electric capacity C is connected with the negative electrode of the negative electrode of described IGCT A and described IGCT B respectively.
Further, the link of described electric capacity C and described inductance L is connected with high voltage isolator module, and described electric capacity C is connected with the negative pole of DC source with described IGCT A link.
Further, described inductance L is connected with one end of single-phase discharge loop with the link of described IGCT A, and described electric capacity C is connected with the other end of single-phase discharge loop with the link of described diode A.
Further, described single-phase discharge loop includes resistance and IGCT C, and the negative electrode of described IGCT C is connected with one end of described resistance, and described electric capacity C is connected with the anode of the link of described IGCT A with described IGCT C;Described inductance L is connected with the other end of described resistance with the link of described diode A;When the voltage of described electric capacity C and the link of described inductance L is lower than the voltage of the described electric capacity C other end, described IGCT C turns on, described electric capacity C by described IGCT C to conductive discharge.
Preferably, described IGBT switch module includes IGBT and diode C;The colelctor electrode of described IGBT is connected with the negative electrode of the positive pole of described DC source and described diode C respectively, the emitter stage of described IGBT is connected with the anode of described diode C and described high voltage isolator module respectively, and the grid of described IGBT drives controller to be connected with IGBT.
Further, described high voltage isolator module includes two or more IGCTs being sequentially connected in series, the anode of first IGCT in the IGCT being sequentially connected in series is connected with the emitter stage of described IGBT, and the negative electrode of last IGCT in the IGCT being sequentially connected in series is connected with one end of the electric capacity C of high voltage DC breaker;The control pole of the whole IGCTs being sequentially connected in series is connected with thyristor driver controller respectively.
Preferably, described method is switched on or off powering to the electric capacity C of described high voltage DC breaker by controlling IGBT switch module and high voltage isolator module.
Further, when the voltage at described electric capacity C two ends is unsatisfactory for instructions for use, triggering described IBGT switch module and described high voltage isolator module is open-minded, described electric capacity C charging given by DC source;When the voltage at described electric capacity C two ends meets instructions for use, trigger described IBGT switch module and turn off;
When the voltage of described electric capacity C with DC power cathode link is higher than the voltage of the described electric capacity C other end, triggers described high voltage isolator module and turn off.
Compared with immediate technical scheme, the present invention has following marked improvement:
1) technical scheme provided by the invention can effectively in real time to the voltage of electric capacity supply abundance and energy, and when system jam, quickly effectively electric discharge, during disengagement failure electric current, improves the functional reliability of dc circuit breaker;Ensure that the safe and stable operation of converter and electrical equipment;
2) present invention arranges controlled high voltage isolator between DC source and electric capacity C, can effectively realize high-voltage electrical apparatus isolation, it is prevented that reversely high voltage is applied directly on DC source, causes and electrically punctures, causes insulation fault.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of active hybrid high voltage DC breaker;
Fig. 2 is the structure principle chart of single-phase discharge loop in Fig. 1;
Fig. 3 is the circuit theory diagrams that in Fig. 1, charge circuit and electric capacity C connect.
Detailed description of the invention
In order to be more fully understood that the present invention, below in conjunction with Figure of description and example, present disclosure is described further.
The present invention provides a kind of active hybrid high voltage DC breaker power supply circuits and method of supplying power to.
The structure of active hybrid high voltage DC breaker is as shown in Figure 1: Fast mechanical switch and power electronic devices series connection, the negative electrode of IGCT A is connected with the negative electrode of IGCT B, the anode of diode A is connected with the anode of diode B, when system failure occurs, electric current flows through Fast mechanical switch and power electronic devices;After fault occurs, controlling IGCT A or IGCT B according to current direction open-minded, making electric capacity C by diode B or diode A to Fast mechanical switch branch road injection current, thus controlling Fast mechanical switch non-arc breaking section when zero-voltage zero-current.
As shown in Figure 2: in order to prevent in the process of circuit breaker trip fault current, electric capacity C powers on and extrudes now just upper negative situation, in two ends parallel connection unidirected discharge loop, LC loop, when under electric capacity C, terminal voltage is higher than upper terminal voltage, trigger turn on thyristors, capacitance voltage to conductive discharge, by the energy on resistance consumption electric capacity C, is reduced to zero by unidirected discharge loop by electric capacity C.
The structure principle chart of power supply circuits is as shown in Figure 3: adopt DC source in this structure, uses IGBT as switch, uses IGCT heap (or high voltage silicon rectifier stack) to isolate high pressure.When capacitance voltage is unsatisfactory for instructions for use, triggering IGBT and IGCT heap (or high voltage silicon rectifier stack), DC source charges to electric capacity, until meeting required electric energy, afterwards locking IGBT during dc circuit breaker normal operation.By detecting electric capacity both end voltage, open or locking IGBT, to ensure that on electric capacity both end voltage and electric capacity, electric energy meets design requirement.When due to network system reason, when back-pressure occurs in electric capacity both end voltage, locking IGCT piles (or high voltage silicon rectifier stack), it is prevented that reversely high voltage is applied on earth potential DC source, causes and electrically punctures, insulation fault.
The high voltage DC breaker adopting this power supply circuits and method of supplying power to is not only able to be applied to flexible direct current system, also apply be applicable to customary DC transmission system, effective fast shut-off fault current, and not disjunction prime AC circuit breaker, effective fast shut-off fault current, and not disjunction prime AC circuit breaker, it is ensured that the reliable and stable operation of system, converter and electrical equipment safe operation are significant.
These are only embodiments of the invention, be not limited to the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacements, improvement etc., all applying within the scope of the presently claimed invention awaited the reply.

Claims (9)

1. active hybrid high voltage DC breaker power supply circuits, it is characterised in that: described power supply circuits include IGBT switch module, high voltage isolator module and DC source;The positive pole of described DC source, described IGBT switch module, described high voltage isolator module are sequentially connected with, and the negative pole of described DC source and the other end of described high voltage isolator module are connected with the electric capacity C two ends of described high voltage DC breaker respectively.
2. a kind of active hybrid high voltage DC breaker power supply circuits as claimed in claim 1, it is characterised in that:
Described high voltage DC breaker includes Fast mechanical switch, power electronic devices, diode A, diode B, inductance L, described electric capacity C, IGCT A, IGCT B;
One end of described Fast mechanical switch is connected with one end of power electronic devices, and its other end is connected with the anode of the negative electrode of described diode A and described IGCT A respectively;The other end of described power electronic devices is connected with the anode of the negative electrode of described diode B and described IGCT B respectively;
The anode of described diode A is connected with one end of the anode of described diode B and described inductance L respectively;The other end of described inductance L is connected with one end of described electric capacity C, and the other end of described electric capacity C is connected with the negative electrode of the negative electrode of described IGCT A and described IGCT B respectively.
3. a kind of active hybrid high voltage DC breaker power supply circuits as claimed in claim 2, it is characterised in that:
The link of described electric capacity C and described inductance L is connected with high voltage isolator module, and described electric capacity C is connected with the negative pole of DC source with described IGCT A link.
4. a kind of active hybrid high voltage DC breaker power supply circuits as claimed in claim 3, it is characterised in that:
Described inductance L is connected with one end of single-phase discharge loop with the link of described IGCT A, and described electric capacity C is connected with the other end of single-phase discharge loop with the link of described diode A.
5. a kind of active hybrid high voltage DC breaker power supply circuits as claimed in claim 3, it is characterised in that:
Described single-phase discharge loop includes resistance and IGCT C, and the negative electrode of described IGCT C is connected with one end of described resistance, and described electric capacity C is connected with the anode of the link of described IGCT A with described IGCT C;Described inductance L is connected with the other end of described resistance with the link of described diode A;When the voltage of described electric capacity C and the link of described inductance L is lower than the voltage of the described electric capacity C other end, described IGCT C turns on, described electric capacity C by described IGCT C to conductive discharge.
6. a kind of active hybrid high voltage DC breaker power supply circuits as claimed in claim 1, it is characterised in that:
Described IGBT switch module includes IGBT and diode C;The colelctor electrode of described IGBT is connected with the negative electrode of the positive pole of described DC source and described diode C respectively, the emitter stage of described IGBT is connected with the anode of described diode C and described high voltage isolator module respectively, and the grid of described IGBT drives controller to be connected with IGBT.
7. a kind of active hybrid high voltage DC breaker power supply circuits as claimed in claim 6, it is characterised in that:
Described high voltage isolator module includes two or more IGCTs being sequentially connected in series, the anode of first IGCT in the IGCT being sequentially connected in series is connected with the emitter stage of described IGBT, and the negative electrode of last IGCT in the IGCT being sequentially connected in series is connected with one end of the electric capacity C of high voltage DC breaker;The control pole of the whole IGCTs being sequentially connected in series is connected with thyristor driver controller respectively.
8. the active hybrid HVDC open circuit method of supplying power to realized with the power supply circuits in claim 1, it is characterised in that: described method is switched on or off powering to the electric capacity C of described high voltage DC breaker by controlling IGBT switch module and high voltage isolator module.
9. method of supplying power to as claimed in claim 8, it is characterised in that:
When the voltage at described electric capacity C two ends is unsatisfactory for instructions for use, triggering described IBGT switch module and described high voltage isolator module is open-minded, described electric capacity C charging given by DC source;When the voltage at described electric capacity C two ends meets instructions for use, trigger described IBGT switch module and turn off;
When the voltage of described electric capacity C with DC power cathode link is higher than the voltage of the described electric capacity C other end, triggers described high voltage isolator module and turn off.
CN201410838506.XA 2014-12-29 2014-12-29 Power supply circuit and power supply method for active hybrid high-voltage direct-current breaker CN105811379A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107942241A (en) * 2017-10-20 2018-04-20 许继电气股份有限公司 A kind of hookup for high voltage DC breaker submodule
WO2019117324A1 (en) * 2017-12-11 2019-06-20 공주대학교 산학협력단 Hybrid high-voltage direct current circuit breaker

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101515710A (en) * 2009-04-07 2009-08-26 东南大学 Direct current limiting and breaking device based on countercurrent injection method
CN103337829A (en) * 2013-07-04 2013-10-02 国家电网公司 Semi-controlled passive injection current high voltage direct current breaker and realization method thereof
CN103337851A (en) * 2013-07-04 2013-10-02 国家电网公司 Semi-controlled active injection current high voltage direct current breaker and realization method thereof
CN103346531A (en) * 2013-02-06 2013-10-09 西安交通大学 Bidirectional breaking-based mixing type circuit breaker
CN104158171A (en) * 2014-08-18 2014-11-19 国家电网公司 High voltage direct current circuit breaker topology circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101515710A (en) * 2009-04-07 2009-08-26 东南大学 Direct current limiting and breaking device based on countercurrent injection method
CN103346531A (en) * 2013-02-06 2013-10-09 西安交通大学 Bidirectional breaking-based mixing type circuit breaker
CN103337829A (en) * 2013-07-04 2013-10-02 国家电网公司 Semi-controlled passive injection current high voltage direct current breaker and realization method thereof
CN103337851A (en) * 2013-07-04 2013-10-02 国家电网公司 Semi-controlled active injection current high voltage direct current breaker and realization method thereof
CN104158171A (en) * 2014-08-18 2014-11-19 国家电网公司 High voltage direct current circuit breaker topology circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107942241A (en) * 2017-10-20 2018-04-20 许继电气股份有限公司 A kind of hookup for high voltage DC breaker submodule
WO2019117324A1 (en) * 2017-12-11 2019-06-20 공주대학교 산학협력단 Hybrid high-voltage direct current circuit breaker

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Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

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Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

Applicant before: State Grid Corporation of China

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Application publication date: 20160727