CN104821658A - Flexible DC power transmission converter valve control protection system and valve control blocking method - Google Patents
Flexible DC power transmission converter valve control protection system and valve control blocking method Download PDFInfo
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- CN104821658A CN104821658A CN201510216573.2A CN201510216573A CN104821658A CN 104821658 A CN104821658 A CN 104821658A CN 201510216573 A CN201510216573 A CN 201510216573A CN 104821658 A CN104821658 A CN 104821658A
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- 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
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- 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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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
Abstract
The invention relates to a flexible DC power transmission converter valve control protection system and a valve control blocking method, and belongs to the technical field of flexible DC power transmission of an electric power system. A pole control interface unit arranged at the uppermost layer of a valve control system is enabled to be connected with submodule interface units arranged at the lowest layer of the valve control system via an independent communication channel. When a fault occurs in the valve control system, an emergency blocking signal is transmitted to submodules by a pole control system directly via the independent communication channel between the pole control interface unit and the submodule interface units so that blocking of a converter valve is realized. The pole control system and the submodules in the converter valve are connected via the independent communication channel. When the fault occurs in the valve control system and the converter valve requires to be blocked, the emergency blocking command is directly transmitted to the submodules by the pole control system via the communication channel so that blocking of the submodules is realized. The submodules of the converter valve can still be protected from being damaged when the fault occurs in the valve control system, and the system is simple and easy to realize.
Description
Technical field
The present invention relates to a kind of flexible direct current transmission converter valve Control protection system and valve control locking method, belong to the Technology of HVDC based Voltage Source Converter field of electric power system.
Background technology
The core of flexible DC power transmission is the voltage source converter that all-controlling power electronics device IGBT is formed, be called as VSC-HVDC technology, independently reactive power can be regulated while transmission of electric energy, realize the reversion of flexible trend, have broad application prospects in fields such as new-energy grid-connected, isolated island power transmission, big city electricity transactions.
Flexible direct current transmission converter station nucleus equipment mainly comprises converter valve, valve control system, pole control system etc., as shown in Figure 1.Converter valve has been the electric power primary equipment of direct current and convert alternating current, is composed in series, as shown in Figure 2 by submodule; Pole control system mainly completes the system-level control and protection of current conversion station; comprise the generation etc. of power adjustments, direct voltage closed-loop control, DC bus overvoltage protection, modulating wave; valve control equipment is the intermediate link of contact pole control system and converter valve; the main control command producing each submodule according to the modulating wave of pole control system, completes the functions such as the issuing of submodule control command, submodule Stateful Inspection.Under normal circumstances, valve control equipment issues control command to all submodules in each control cycle, and what control submodule IGBT opens shutoff.When valve control equipment fault, because control command cannot be issued to submodule, submodule can be caused to be in not slave mode, easily to cause the faults such as overcurrent-overvoltage, thus cause submodule to damage, a large amount of submodule IGBT avalanche breakdown time serious, can be caused.
For the problems referred to above, valve control system is generally designed to two systems of dual redundant by prior art, if application number is the patent document of 201310097775, this patent document discloses a kind of direct-current transmission converter valve Control protection system, valve control equipment for subsequent use is can switch to when main valve control equipment breaks down, although the reliability of converter valve can be improved in this way, reduce the probability that submodule damages, but the valve control equipment arranging redundancy adds cost on the one hand, another fermentation when all valve control equipment all break down need locking time, blocking order still cannot be issued to submodule, submodule can be caused equally to be in not slave mode.
Summary of the invention
The object of this invention is to provide a kind of flexible direct current transmission converter valve Control protection system and valve control locking method, cause submodule to be in not controlled problem to solve because control command cannot be issued to submodule by valve control equipment fault.
The present invention is for solving the problems of the technologies described above and providing a kind of flexible direct current transmission converter valve Control protection system, comprise pole control system and valve control system, valve control system is connected with pole control system by the pole control interface unit of its superiors, for the control signal of receiving pole Ore-controlling Role, valve control system is used for by its undermost submodule interface unit connexon module, the pole control interface unit of the described valve control system the superiors is connected with the undermost submodule interface unit of valve control system by independent communication passage, when valve control system breaks down, urgent block signal is directly sent to submodule by the independent communication passage between pole control interface unit and submodule interface unit by pole control system, realize the locking of converter valve.
Independent communication passage between described pole control interface unit and submodule interface unit is optical-fibre channel.
Described valve control system redundancy is arranged, and when the valve control system that redundancy is arranged all breaks down, pole control system sends urgent block signal.
When not being 1MHz effectively, when urgent block signal is effective, submodule interface unit sends block signal to administrative whole converter valve submodule to described urgent block signal, and locking converter valve, to ensure that submodule is not damaged.
Described submodule interface unit, at the urgent block signal that parsing pole control system sends with when sending urgent block signal to submodule, does not rely on the synchronizing signal of valve control system inside.
Present invention also offers a kind of valve control locking method of flexible direct current transmission converter valve, the pole control interface unit of the valve control system the superiors is coupled together by independent communication passage and the undermost submodule interface unit of valve control system by this valve control locking method, when valve control system breaks down, urgent block signal is directly sent to submodule by the independent communication passage between pole control interface unit and submodule interface unit by pole control system, realizes the locking of converter valve.
Independent communication passage between described pole control interface unit and submodule interface unit is optical-fibre channel.
Described valve control system is that redundancy is arranged, and when the valve control system that redundancy is arranged all breaks down, pole control system sends urgent block signal.
When not being 1MHz effectively, when urgent block signal is effective, submodule interface unit sends block signal to administrative whole converter valve submodule to described urgent block signal, and locking converter valve, to ensure that submodule is not damaged.
Described submodule interface unit, at the urgent block signal that parsing pole control system sends with when sending urgent block signal to submodule, does not rely on the synchronizing signal of valve control system inside.
The invention has the beneficial effects as follows: the pole control interface unit of the valve control system the superiors is coupled together by independent communication passage and the undermost submodule interface unit of valve control system by the present invention, when valve control system breaks down, urgent block signal is directly sent to submodule by the independent communication passage between pole control interface unit and submodule interface unit by pole control system, realizes the locking of converter valve.Submodule in pole control system and converter valve is coupled together by independently communication port by the present invention, when valve control system breaks down and converter valve needs locking, urgent locking order is directly sent to submodule by above-mentioned communication port by pole control system, realizes the locking of submodule.The present invention, when valve control system breaks down, still can protect converter valve submodule not to be damaged, and solves and cannot issue converter valve submodule that block signal causes and be in when valve control system breaks down the overcurrent-overvoltage fault that not slave mode causes.And the present invention is simple, easily realizes.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of flexible direct current power transmission system;
Fig. 2 is the concrete structure schematic diagram of converter valve;
Fig. 3 is signal connection diagram in flexible direct current transmission converter station in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
The embodiment of a kind of flexible direct current transmission converter valve Control protection system of the present invention
Flexible direct current transmission converter valve Control protection system in the present embodiment comprises pole control system and valve control system, valve control system is connected with pole control system by the pole control interface unit of its superiors, for the control signal of receiving pole Ore-controlling Role, valve control system is by its undermost submodule interface unit control connection converter valve submodule, the pole control interface unit of the valve control system the superiors is connected with the undermost submodule interface unit of valve control system by independent communication passage, when valve control system breaks down, urgent block signal is directly sent to submodule by the independent communication passage between pole control interface unit and submodule interface unit by pole control system, realize the locking of converter valve.
As shown in Figure 3, flexible direct current transmission converter valve Control protection system in the present embodiment comprises pole control system and valve control system, valve control system comprises the pole control interface unit communicated to connect with pole control system, converter control unit, each phase brachium pontis control unit, each phase brachium pontis submodule control unit and each phase brachium pontis submodule interface unit, valve control system is communicated to connect by the pole control interface unit on upper strata and pole control system, communicated to connect with corresponding each phase brachium pontis converter valve submodule by each phase brachium pontis submodule interface unit of lower floor, converter control unit one end is connected with pole control interface unit communication, the other end communicates to connect with each phase brachium pontis control unit, modulation signal for issuing according to pole control system produces the control signal of each phase brachium pontis, each phase brachium pontis control unit communicates to connect with each phase brachium pontis submodule control unit, for the control signal of each phase brachium pontis being sent to each phase brachium pontis submodule control unit, each phase brachium pontis submodule control unit is connected with each phase brachium pontis submodule interface unit communications, each phase brachium pontis submodule interface unit communicates to connect with each phase brachium pontis converter valve submodule, the output of pole control interface unit passes through independently communication port and is connected with the input of each phase brachium pontis submodule interface unit, for transmitting urgent block signal when valve control system breaks down, independent communication passage in the present embodiment can adopt optical-fibre channel.
When valve control system is in normal operating conditions, pole control system produces modulation signal and is issued to converter control unit by pole control interface unit, generated the control command of each phase brachium pontis submodule according to the modulation signal received by converter control unit, and be issued to each phase brachium pontis converter valve submodule by each phase brachium pontis control unit, each phase brachium pontis submodule control unit and each phase brachium pontis submodule interface unit, realize the control to converter valve submodule and Stateful Inspection.
(valve control hardware fault, software crash etc. are comprised) when valve control system breaks down, normal data communication (as shown in Figure 3) cannot issue, block signal also cannot be issued to converter valve submodule by communication port during normal operation, now, urgent block signal is directly sent to each phase brachium pontis converter valve submodule by the optical-fibre channel between pole control interface unit with submodule interface unit by pole control system, realizes the lock-in control to converter valve.
Urgent block signal is sent to undermost submodule interface unit from the interface unit of the Fa Kong the superiors; do not rely on the control units at different levels of valve control inside; its Code And Decode does not rely on the synchronizing signal of valve control inside yet; submodule interface unit receives when urgent block signal that pole control interface unit sends is not 1MHz (comprising no signal condition); think that urgent block signal is effective; send urgent block signal to administrative whole converter valve submodule, thus protection submodule is not damaged.
For the valve control system of two redundancy, two valve control system A and B stand-by heat each other, when A system jam on duty, system can automatically switch to B system and continue to run, when valve control B system also breaks down, normal data cannot issue, and block signal also cannot be issued to converter valve submodule by valve control system during normal operation, causes converter valve submodule to be in not slave mode.For this reason, the present invention arranges independently communication port between pole control interface unit and submodule interface unit, when the valve control system of redundancy all breaks down and converter valve needs locking, urgent pole control system sends the submodule of urgent block signal to converter valve by the independent communication passage between pole control interface unit and submodule interface unit, locking submodule.Therefore, the present invention is applicable equally for the valve control system of two redundancy, the problem that the converter valve submodule that the valve control system avoiding two redundancy all breaks down caused is not controlled.
The embodiment of the valve control locking method of a kind of flexible direct current transmission converter valve of the present invention
The pole control interface unit of the valve control system the superiors is coupled together by independent communication passage and the undermost submodule interface unit of valve control system by the valve control locking method in the present embodiment, when valve control system breaks down, urgent block signal is directly sent to submodule by the independent communication passage between pole control interface unit and submodule interface unit by pole control system, realizes the locking of converter valve.
Concrete implementation procedure is: when valve control system normally works, pole control system sends modulating wave to valve control equipment, valve control equipment generates corresponding control command according to the modulating wave of pole control system and is handed down to each converter valve submodule in each control cycle, realizes issuing and Stateful Inspection of submodule control command; When valve control system breaks down (comprising valve control hardware fault, software crash etc.); the signal of pole control system cannot generate control command by valve control equipment and be handed down to submodule; now; pole control system issues urgent block signal to converter valve each phase brachium pontis submodule by pole control interface unit and the independent communication passage between submodule interface unit; each phase brachium pontis submodule carries out locking according to the urgent block signal received, thus protection submodule is not impaired changes.The present invention is applicable equally for the valve control system of two redundancy, when the valve control system of two redundancy all break down need locking converter valve time, the present invention utilizes the independent communication passage between pole control interface unit and submodule interface unit that urgent block signal is sent to converter valve submodule, enable the locking when all valve control systems all break down of converter valve submodule, avoid converter valve is in not slave mode problem when valve control system breaks down.
Urgent block signal is sent to undermost submodule interface unit from the interface unit of the Fa Kong the superiors; do not rely on the control units at different levels of valve control inside; its Code And Decode does not rely on the synchronizing signal of valve control inside yet; submodule interface unit receives when urgent block signal that pole control interface unit sends is not 1MHz (comprising no signal condition); think that urgent block signal is effective; send urgent block signal to administrative whole converter valve submodule, thus protection submodule is not damaged.
Claims (10)
1. a flexible direct current transmission converter valve Control protection system, comprise pole control system and valve control system, valve control system is connected with pole control system by the pole control interface unit of its superiors, for the control signal of receiving pole Ore-controlling Role, valve control system is used for by its undermost submodule interface unit connexon module, it is characterized in that, the pole control interface unit of the described valve control system the superiors is connected with the undermost submodule interface unit of valve control system by independent communication passage, when valve control system breaks down, urgent block signal is directly sent to submodule by the independent communication passage between pole control interface unit and submodule interface unit by pole control system, realize the locking of converter valve.
2. flexible direct current transmission converter valve Control protection system according to claim 1, is characterized in that, the independent communication passage between described pole control interface unit and submodule interface unit is optical-fibre channel.
3. flexible direct current transmission converter valve Control protection system according to claim 1 and 2, is characterized in that, described valve control system redundancy is arranged, and when the valve control system that redundancy is arranged all breaks down, pole control system sends urgent block signal.
4. flexible direct current transmission converter valve Control protection system according to claim 3; it is characterized in that; described urgent block signal is effective when not being 1MHz; when urgent block signal is effective; submodule interface unit sends block signal to administrative whole converter valve submodule; locking converter valve, to ensure that submodule is not damaged.
5. flexible direct current transmission converter valve Control protection system according to claim 3; it is characterized in that; described submodule interface unit, at the urgent block signal that parsing pole control system sends with when sending urgent block signal to submodule, does not rely on the synchronizing signal of valve control system inside.
6. the valve control locking method of a flexible direct current transmission converter valve, it is characterized in that, the pole control interface unit of the valve control system the superiors is coupled together by independent communication passage and the undermost submodule interface unit of valve control system by this valve control locking method, when valve control system breaks down, urgent block signal is directly sent to submodule by the independent communication passage between pole control interface unit and submodule interface unit by pole control system, realizes the locking of converter valve.
7. the valve control locking method of flexible direct current transmission converter valve according to claim 6, is characterized in that, the independent communication passage between described pole control interface unit and submodule interface unit is optical-fibre channel.
8. the valve control locking method of the flexible direct current transmission converter valve according to claim 6 or 7, is characterized in that, described valve control system is that redundancy is arranged, and when the valve control system that redundancy is arranged all breaks down, pole control system sends urgent block signal.
9. the valve control locking method of flexible direct current transmission converter valve according to claim 8, it is characterized in that, described urgent block signal is effective when not being 1MHz, when urgent block signal is effective, submodule interface unit sends block signal to administrative whole converter valve submodule, locking converter valve, to ensure that submodule is not damaged.
10. the valve control locking method of flexible direct current transmission converter valve according to claim 9, it is characterized in that, described submodule interface unit, at the urgent block signal that parsing pole control system sends with when sending urgent block signal to submodule, does not rely on the synchronizing signal of valve control system inside.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510216573.2A CN104821658B (en) | 2015-04-30 | 2015-04-30 | A kind of flexible direct current transmission converter valve Control protection system and valve control locking method |
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| CN201510216573.2A CN104821658B (en) | 2015-04-30 | 2015-04-30 | A kind of flexible direct current transmission converter valve Control protection system and valve control locking method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107783519A (en) * | 2017-09-29 | 2018-03-09 | 南京南瑞继保电气有限公司 | A kind of converter valve Control protection system framework |
| CN108233346A (en) * | 2018-03-27 | 2018-06-29 | 国网冀北电力有限公司检修分公司 | A kind of multiterminal of flexible direct current power grid coordinate control and protection system |
| CN109597298A (en) * | 2018-11-15 | 2019-04-09 | 许继集团有限公司 | The current control method and system of flexible direct current converter valve transient current pilot system |
| CN110212502A (en) * | 2019-06-20 | 2019-09-06 | 国网冀北电力有限公司检修分公司 | A kind of converter valve guard method and system |
| CN111181190A (en) * | 2020-01-15 | 2020-05-19 | 许继集团有限公司 | Direct-current converter valve control system and switching control method and device thereof |
| CN111585256A (en) * | 2020-05-22 | 2020-08-25 | 西安许继电力电子技术有限公司 | Control method and device for hybrid cascade multi-end converter valve |
| CN111697542A (en) * | 2020-05-14 | 2020-09-22 | 南方电网科学研究院有限责任公司 | Control system and method for synchronous temporary locking of flexible direct-current valve group |
| CN111813608A (en) * | 2020-06-04 | 2020-10-23 | 国家电网有限公司 | Submodule interface unit, redundancy system and redundancy control method |
| WO2022052830A1 (en) * | 2020-09-10 | 2022-03-17 | 国家电网有限公司 | Valve based control and protection method, and device and storage medium |
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| CN102931652A (en) * | 2011-12-28 | 2013-02-13 | 许继集团有限公司 | Modular multi-level flexible DC power transmission valve control system and pole control system communication method |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107783519A (en) * | 2017-09-29 | 2018-03-09 | 南京南瑞继保电气有限公司 | A kind of converter valve Control protection system framework |
| CN108233346A (en) * | 2018-03-27 | 2018-06-29 | 国网冀北电力有限公司检修分公司 | A kind of multiterminal of flexible direct current power grid coordinate control and protection system |
| CN108233346B (en) * | 2018-03-27 | 2020-01-03 | 国网冀北电力有限公司检修分公司 | Multi-terminal coordinated control protection system of flexible direct-current power grid |
| CN109597298B (en) * | 2018-11-15 | 2021-07-09 | 许继集团有限公司 | Current control method and system of flexible direct current converter valve transient current test system |
| CN109597298A (en) * | 2018-11-15 | 2019-04-09 | 许继集团有限公司 | The current control method and system of flexible direct current converter valve transient current pilot system |
| CN110212502A (en) * | 2019-06-20 | 2019-09-06 | 国网冀北电力有限公司检修分公司 | A kind of converter valve guard method and system |
| CN110212502B (en) * | 2019-06-20 | 2023-12-29 | 国网冀北电力有限公司检修分公司 | Converter valve protection method and system |
| CN111181190A (en) * | 2020-01-15 | 2020-05-19 | 许继集团有限公司 | Direct-current converter valve control system and switching control method and device thereof |
| CN111181190B (en) * | 2020-01-15 | 2021-12-24 | 许继集团有限公司 | Direct-current converter valve control system and switching control method and device thereof |
| CN111697542A (en) * | 2020-05-14 | 2020-09-22 | 南方电网科学研究院有限责任公司 | Control system and method for synchronous temporary locking of flexible direct-current valve group |
| CN111697542B (en) * | 2020-05-14 | 2022-09-16 | 南方电网科学研究院有限责任公司 | Control system and method for synchronous temporary locking of flexible direct-current valve group |
| CN111585256A (en) * | 2020-05-22 | 2020-08-25 | 西安许继电力电子技术有限公司 | Control method and device for hybrid cascade multi-end converter valve |
| CN111813608A (en) * | 2020-06-04 | 2020-10-23 | 国家电网有限公司 | Submodule interface unit, redundancy system and redundancy control method |
| CN111813608B (en) * | 2020-06-04 | 2024-02-09 | 国家电网有限公司 | Sub-module interface unit, redundancy system and redundancy control method |
| WO2022052830A1 (en) * | 2020-09-10 | 2022-03-17 | 国家电网有限公司 | Valve based control and protection method, and device and storage medium |
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