CN104092232B - A kind of flexible direct current power transmission system electrical changing station automatic blocking method - Google Patents
A kind of flexible direct current power transmission system electrical changing station automatic blocking method Download PDFInfo
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- CN104092232B CN104092232B CN201410300300.1A CN201410300300A CN104092232B CN 104092232 B CN104092232 B CN 104092232B CN 201410300300 A CN201410300300 A CN 201410300300A CN 104092232 B CN104092232 B CN 104092232B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 34
- 230000000903 blocking effect Effects 0.000 title claims abstract description 27
- 238000004891 communication Methods 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 1
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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]
Abstract
The invention discloses a kind of flexible direct current power transmission system electrical changing station automatic blocking method, including: (1) judges the control model of our station and the running status at our station and other stations；(2) if our station is constant DC voltage control pattern, and our station is in released state and is in blocking in other stations simultaneously, it is judged that the running status that current flexible direct current system is run；(3) if above-mentioned condition is satisfied by, start our station latching process according to the system lock-in control instruction received, carry out dropping Reactive Power Control；(4) if current commutation station reactive power is zero, send locking start pulse signal, complete latching process.The automatic blocking method of the present invention achieves the automatic blocking of Control protection system; shorten flexible direct current power transmission system latching process; effectively prevent artificial maloperation etc. and cause Control protection system misoperation and impact to AC system; reduce whole flexible direct current system latching process consuming time, reduce numerous and diverse degree in latching process.
Description
Technical field
The invention belongs to flexible direct-current transmission field, be specifically related to a kind of flexible direct current power transmission system electrical changing station automatic blocking method.
Background technology
In existing flexible DC power transmission engineering, no matter both-end flexible direct current engineering or Multi-end flexible direct current transmission engineering, all cannot be automatically obtained the locking of whole flexible direct current power transmission system.Each current conversion station is each responsible for local terminal current conversion station latching process, and under scheduling unified allocation of resources, it is achieved the locking successively of each current conversion station, the inevitable whole system latching process that extends, in increasing system latching process, indivedual current conversion station tripping operations cause whole system trip risk.Meanwhile, in whole latching process, anthropic factor occupies leading position, it is possible to causes and determines Control of Voltage current conversion station in flexible direct current system prior to determining active power controller current conversion station locking, cause Control protection system misoperation, affects ac and dc systems stable operation.
Summary of the invention
It is an object of the invention to provide a kind of flexible direct current power transmission system electrical changing station automatic blocking method, it is achieved flexible direct current power transmission system automatic blocking.
In order to realize object above, the technical solution adopted in the present invention is: a kind of flexible direct current power transmission system electrical changing station automatic blocking method, comprises the steps:
(1) control model of our station and the running status at our station and other stations are judged；
(2) if our station is constant DC voltage control pattern, and our station is in released state and is in blocking in other stations simultaneously, judge whether current flexible direct current system is in unblock operational mode, and whether whether operate in communication state between system layer control model or remote dispatching control model and station normal；
(3) if above-mentioned condition is satisfied by, start our station latching process according to the system lock-in control instruction received, carry out dropping Reactive Power Control；
(4) if current commutation station reactive power is zero, send locking start pulse signal, complete latching process, it is achieved this flexible direct current power transmission system is stopped transport.
This flexible direct current power transmission system carries out communication information mutual between each electrical changing station.
The information of each electrical changing station phase interchangeable includes communication status signal between station operating state signal, control model of standing signal and station.
When current commutation station reactive power is zero, send locking start pulse signal to valve control system.
The flexible direct current power transmission system automatic blocking method of the present invention achieves the automatic blocking of Control protection system in flexible DC power transmission engineering; shorten flexible direct current power transmission system latching process; effectively prevent artificial maloperation etc. and cause Control protection system misoperation and impact to AC system; reduce whole flexible direct current system latching process consuming time simultaneously; reduce numerous and diverse degree in latching process, improve alterating and direct current network operation reliability.
Accompanying drawing explanation
Fig. 1 is both-end flexible direct current power transmission system Control protection system relational structure figure；
Fig. 2 is Multi-end flexible direct current transmission system Control protection system relational structure figure；
Fig. 3 is both-end flexible direct current system constant DC voltage control current conversion station latching logic block diagram；
Fig. 4 is multiterminal flexible direct current system constant DC voltage control current conversion station latching logic block diagrams.
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further.
No matter respectively both-end and Multi-end flexible direct current transmission system Control protection system relational structure as depicted in figs. 1 and 2, as seen from the figure, be both-end or multiterminal, and each current conversion station Control protection system corresponding is redundant system.In normal course of operation, Control protection system adopts active/standby mode to run, if current master control system breaks down, the back-up system being in hot stand-by duty transfers active system automatically to, and dc power transmission will not be produced disturbance by whole system handoff procedure.Control protection system adopts two to take a trip protection outlet logic; two set Control protection system are separate; often set protection system has two and independently measures loop; it is used, respectively, to initiate logic and action logic judges; the two output signal carry out " with "; namely starting in logic and action logic all effectively situation, protection act signal can effectively export.
Between current conversion station, communication information is completed by electric power special communication network alternately, needs to set up quickly communication channel between station, be used for sharing each current conversion station operating condition between each current conversion station.For ensureing communication signal link reliability between station, often set Control protection system redundant configuration, all adopts dual link communication modes standby each other, guarantee information transmission reliability to greatest extent.Corresponding to automatic blocking logical design, each station phase interchangeable information specifically includes: communication status signal (whether normal) etc. between operating state signal of standing (stand unlocking signal or station block signal), control model of standing signal (stand active power controller mode signal or stream voltage mode control signal of standing erectly) and station.
Flexible direct current power transmission system electrical changing station automatic blocking method provided by the invention comprises the steps:
(1) control model of our station and the running status at our station and other stations are judged；
(2) if our station is constant DC voltage control pattern, and our station is in released state and is in blocking in other stations simultaneously, judge whether current flexible direct current system is in unblock operational mode, and whether whether operate in communication state between system layer control model or remote dispatching control model and station normal；
(3) if above-mentioned condition is satisfied by, start our station latching process according to the system lock-in control instruction received, carry out dropping Reactive Power Control；
(4) if current commutation station reactive power is zero, send locking start pulse signal, complete latching process, it is achieved this flexible direct current power transmission system is stopped transport.
For ensureing flexible direct current power transmission system automatic blocking reliability; this inventive method has self-diagnostic function design; real-time judge current commutation interior communication state; when between station in communication failure situation; automatic shield flexible direct current power transmission system automatic blocking function; and send a warning message in operator control system, improve Control protection system reliability in system latching process.
Being illustrated in figure 3 double ended system automatic blocking constant DC voltage control station latching logic figure, control system first determines whether that this station is constant DC voltage control current conversion station, and system operates in system layer control model or remote dispatching control model, and between standing, communication state is normal.Meet in situation in above-mentioned condition, when control system receives system block signal and receives after to station blocking signal, automatically start our station latching process, namely carry out dropping Reactive Power Control.When control system detects that current commutation station exchange reactive power is zero, send locking start pulse signal to valve control system, complete our station latching process.So far, complete both-end flexible direct current power transmission system to stop transport.
Multi-terminal system automatic blocking constant DC voltage control station latching logic figure as shown in Figure 4, control system first determines whether that this station is constant DC voltage control current conversion station, and system operates in system layer control model or remote dispatching control model, communication state OK between standing.Meet in situation in above-mentioned condition, after control system receives system block signal and receives all the other end current conversion station blocking signals, automatically start our station latching process, namely carry out dropping Reactive Power Control.When control system detects that current commutation station exchange reactive power is zero, send locking start pulse signal to valve control system, complete our station latching process.So far, complete Multi-end flexible direct current transmission system to stop transport.
Above example is only adapted to assist in the core concept understanding the present invention; the present invention can not be limited with this; for those skilled in the art; every thought according to the present invention; the present invention is modified or equivalent replacement; the any change done in specific embodiments and applications, should be included within protection scope of the present invention.
Claims (4)
1. a flexible direct current power transmission system electrical changing station automatic blocking method, it is characterised in that comprise the steps:
(1) control model of our station and the running status at our station and other stations are judged；
(2) if our station is constant DC voltage control pattern, and our station is in released state and is in blocking in other stations simultaneously, judge whether current flexible direct current system is in unblock operational mode, and whether whether operate in communication state between system layer control model or remote dispatching control model and station normal；
(3) if above-mentioned condition is satisfied by, start our station latching process according to the system lock-in control instruction received, carry out dropping Reactive Power Control；
(4) if current commutation station reactive power is zero, send locking start pulse signal, complete latching process, it is achieved this flexible direct current power transmission system is stopped transport.
2. flexible direct current power transmission system electrical changing station automatic blocking method according to claim 1, it is characterised in that: this flexible direct current power transmission system carries out communication information mutual between each electrical changing station.
3. flexible direct current power transmission system electrical changing station automatic blocking method according to claim 2, it is characterised in that: the information of each electrical changing station phase interchangeable includes communication status signal between station operating state signal, control model of standing signal and station.
4. flexible direct current power transmission system electrical changing station automatic blocking method according to claim 1, it is characterised in that: when current commutation station reactive power is zero, send locking start pulse signal to valve control system.
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| CN201410300300.1A CN104092232B (en) | 2014-06-26 | 2014-06-26 | A kind of flexible direct current power transmission system electrical changing station automatic blocking method |
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| CN201410300300.1A CN104092232B (en) | 2014-06-26 | 2014-06-26 | A kind of flexible direct current power transmission system electrical changing station automatic blocking method |
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| CN104092232B true CN104092232B (en) | 2016-06-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104362660B (en) * | 2014-10-11 | 2016-11-30 | 中国南方电网有限责任公司 | The bipolar operation method of earthing mode in HVDC transmission system station |
| CN105680468B (en) * | 2016-04-15 | 2018-09-25 | 国网福建省电力有限公司 | A kind of fool proof door interlock system in flexible direct current converter station valve Room |
| CN107171353B (en) * | 2017-06-15 | 2020-03-20 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Light control valve control method for preventing current from being unable to be established during direct current unlocking |
| CN109888749B (en) * | 2019-03-20 | 2021-04-09 | 国网冀北电力有限公司检修分公司 | Control method and device for direct current circuit breaker |
| CN110165697B (en) * | 2019-06-06 | 2021-04-30 | 北京四方继保自动化股份有限公司 | One-key starting and stopping method and device for multi-terminal flexible direct current power distribution system |
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| CN102299506B (en) * | 2011-08-24 | 2014-10-29 | 中国电力科学研究院 | Protection system and method thereof for modular multi-level converter |
| CN102427245B (en) * | 2011-10-11 | 2014-04-09 | 山东大学 | Movable model device of system of offshore wind power synchronized through flexible DC (Direct Current) power transmission |
| CN102857086A (en) * | 2012-09-12 | 2013-01-02 | 中国能源建设集团广东省电力设计研究院 | Device and method for starting three-terminal flexible direct-current power transmission system |
| CN102856897B (en) * | 2012-09-12 | 2014-08-20 | 中国能源建设集团广东省电力设计研究院 | Method and strategy for stopping three-end flexible DC power transmission system |
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