CN104092299A - Automatic locking method for flexible direct-current transmission system - Google Patents
Automatic locking method for flexible direct-current transmission system Download PDFInfo
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- CN104092299A CN104092299A CN201410299304.2A CN201410299304A CN104092299A CN 104092299 A CN104092299 A CN 104092299A CN 201410299304 A CN201410299304 A CN 201410299304A CN 104092299 A CN104092299 A CN 104092299A
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- station
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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
- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
Abstract
The invention discloses an automatic locking method for a flexible direct-current transmission system. The automatic locking method includes the following steps of firstly, judging the control mode of a station; secondly, judging the current running state when the flexible direct-current system runs if the station is judged to have the active power control mode; thirdly, starting the locking process of the station according to a received system locking control instruction if all the conditions are met, and conducting power reduction control; fourthly, sending a locking window signal to complete the locking process if both the active power and the reactive power of the current converter station are zero. By means of the automatic locking method for the flexible direct-current transmission system, a control and protection system in a flexible direct-current transmission project is automatically locked, the locking process of the flexible direct-current transmission system is shortened, impact which is caused by control and protection system incorrect operation generated due to man-made incorrect operation and the like to an alternating-current system is effectively avoided, time consumption of the whole locking process of the flexible direct-current system is lowered, the complexity in the locking process is lowered, and running reliability of a direct-current power grid is improved.
Description
Technical field
The invention belongs to flexible DC power transmission field, be specifically related to a kind of flexible DC power transmission system automatic blocking method.
Background technology
In existing flexible DC power transmission engineering, no matter both-end flexible direct current engineering or multiterminal flexible DC power transmission engineering, all cannot realize the locking of whole flexible DC power transmission system automatically.Each current conversion station is responsible for local terminal current conversion station locking process separately, under scheduling unified allocation of resources, realize the locking successively of each current conversion station, unavoidably extend whole system locking process, strengthen indivedual current conversion station tripping operations in system locking process and cause whole system tripping operation risk.Meanwhile, in whole locking process, human factor dominate, may cause and in flexible direct current system, determine voltage control current conversion station and control current conversion station locking prior to determining active power, causes and controls protection system misoperation, affects ac and dc systems stable operation.
Summary of the invention
The object of this invention is to provide a kind of flexible DC power transmission system automatic blocking method, realize flexible DC power transmission system automatic blocking.
In order to realize above object, the technical solution adopted in the present invention is: a kind of flexible DC power transmission system automatic blocking method, comprises the steps:
(1) control model of judgement our station;
(2) whether if our station for to determine active power control model, judges that whether current flexible direct current system is in release operational mode, and it is normal whether to operate between system layer control model or remote dispatching control model and station communication state;
(3) if above-mentioned condition all meets, according to the system lock-in control instruction receiving, start our station locking process, fall power and control;
(4) if current current conversion station active power and reactive power are zero, send locking start pulse signal, complete locking process, our station blocking signal is sent to other current conversion stations simultaneously.
Judge that whether current flexible direct current system is as follows in the condition of release operational mode: the DC connecting end of electrical changing station connects with corresponding polar curve, any one in released state and other electrical changing stations of our station is also in released state simultaneously.
In this flexible DC power transmission system, between each electrical changing station, carry out communication information mutual.
The information that each electrical changing station exchanges mutually comprises communication state signal between station operating state signal, the control model of standing signal and station.
Current current conversion station active power and reactive power are zero, send locking start pulse signal to valve control system.
Flexible DC power transmission system automatic blocking method of the present invention has realized the automatic blocking of controlling protection system in flexible DC power transmission engineering; shorten flexible DC power transmission system locking process; effectively to have avoided people be misoperation etc. causes and controls the impact of protection system misoperation to AC system; reduce whole flexible direct current system locking process consuming time simultaneously; reduce numerous and diverse degree in locking process, improved alterating and direct current network operation reliability.
Accompanying drawing explanation
Fig. 1 is that both-end flexible DC power transmission system is controlled protection system relational structure figure;
Fig. 2 is that multiterminal flexible DC power transmission system is controlled protection system relational structure figure;
Fig. 3 is that both-end flexible direct current system is determined power control current conversion station latching logic block diagram;
Fig. 4 is that multiterminal flexible direct current system is determined power control current conversion station latching logic block diagram.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further.
Be respectively as depicted in figs. 1 and 2 both-end and multiterminal flexible DC power transmission system and control protection system relational structure, as seen from the figure, no matter be both-end or multiterminal, corresponding each current conversion station is controlled protection system and is redundant system.In normal course of operation, control protection system and adopt active/standby mode operation, if current master control system breaks down, the back-up system in hot stand-by duty transfers primary system automatically to, and whole system handoff procedure can not produce disturbance to direct current power transmission.Controlling protection system adopts two to get a trip protection outlet logic; it is separate that two covers are controlled protection system; every cover protection system has two independent measurement loops; be respectively used to enable logic and action logic judgement; the two output signal carry out " with "; be enable logic and action logic all effectively in situation, protection actuating signal can effectively be exported.
Between current conversion station, communication information completes by electric power special communication network alternately, needs to set up communication channel between quick station between each current conversion station, for sharing each current conversion station operating condition.For guaranteeing communication signal link reliability between station, every cover is controlled protection system redundant configuration, all adopts standby each other dual link communication modes, to greatest extent guarantee information transmission reliability.Corresponding to automatic blocking logical design, each mutual exchange message of standing specifically comprises: the operating state signal of standing (stand unlocking signal or station block signal), the control model of stand signal (active power of stand control model signal or stand erectly and flow voltage mode control signal) and stand between communication state signal (whether normal) etc.
Flexible DC power transmission system automatic blocking method provided by the invention comprises the steps:
(1) control model of judgement our station;
(2) whether if our station for to determine active power control model, judges that whether current flexible direct current system is in release operational mode, and it is normal whether to operate between system layer control model or remote dispatching control model and station communication state;
(3) if above-mentioned condition all meets, according to the system lock-in control instruction receiving, start our station locking process, fall power and control;
(4) if current current conversion station active power and reactive power are zero, send locking start pulse signal, complete locking process, our station blocking signal is sent to other current conversion stations simultaneously.
Judge that whether current flexible direct current system is as follows in the condition of release operational mode: the utmost point connection status of electrical changing station, any one in released state and other electrical changing stations of our station is also in released state simultaneously.
For guaranteeing flexible DC power transmission system automatic blocking reliability; this inventive method has self-diagnostic function design; communications status between the current current conversion station of real-time judge; in communication failure situation between station; automatic shield flexible DC power transmission system automatic blocking function; and send a warning message in operator control system, improve in system locking process and control protection system reliability.
Take respectively both-end and multiterminal flexible DC power transmission system below controls protection system and is specifically described as example.
Be illustrated in figure 3 double ended system automatic blocking and determine power control station latching logic figure; control protection system and first judge that current flexible direct current system is both-end release operational mode; and system operates in system layer control model or remote dispatching control model, and between standing, communication state is normal.In above-mentioned condition, meet in situation, when control system receives after system block signal, automatically start our station locking process, fall power and control.When control system detects current current conversion station exchange active power, reactive power and is zero, send locking start pulse signal to valve control system, complete our station locking process, our station blocking signal is sent to the control protection system of opposite end current conversion station simultaneously.
Multi-terminal system automatic blocking is determined power control station latching logic figure as shown in Figure 4, first control system judges that current flexible direct current system is multiterminal release operational mode, and system operates in system layer control model or remote dispatching control model, and between standing, communication state is normal.In above-mentioned condition, meet in situation, when control system receives after system block signal, automatically start our station locking process, fall power and control.When control system detects current current conversion station exchange active power, reactive power and is zero; send locking start pulse signal and valve control system; complete our station locking process, our station blocking signal is sent to the control protection system of other end current conversion station simultaneously.
Above embodiment is only for helping to understand core concept of the present invention; can not limit the present invention with this; for those skilled in the art; every foundation thought of the present invention; the present invention is modified or is equal to replacement; any change of doing in specific embodiments and applications, within all should being included in protection scope of the present invention.
Claims (5)
1. a flexible DC power transmission system automatic blocking method, is characterized in that, comprises the steps:
(1) control model of judgement our station;
(2) whether if our station for to determine active power control model, judges that whether current flexible direct current system is in release operational mode, and it is normal whether to operate between system layer control model or remote dispatching control model and station communication state;
(3) if above-mentioned condition all meets, according to the system lock-in control instruction receiving, start our station locking process, fall power and control;
(4) if current current conversion station active power and reactive power are zero, send locking start pulse signal, complete locking process, our station blocking signal is sent to other current conversion stations simultaneously.
2. flexible DC power transmission system automatic blocking method according to claim 1, it is characterized in that: judge that whether current flexible direct current system is as follows in the condition of release operational mode: the utmost point connection status of electrical changing station, any one in released state and other electrical changing stations of our station is also in released state simultaneously.
3. flexible DC power transmission system automatic blocking method according to claim 1, is characterized in that: it is mutual in this flexible DC power transmission system, between each electrical changing station, to carry out communication information.
4. flexible DC power transmission system automatic blocking method according to claim 3, is characterized in that: the information that each electrical changing station exchanges mutually comprises communication state signal between station operating state signal, the control model of standing signal and station.
5. flexible DC power transmission system automatic blocking method according to claim 1, is characterized in that: current current conversion station active power and reactive power are zero, sends locking start pulse signal to valve control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410299304.2A CN104092299B (en) | 2014-06-26 | 2014-06-26 | A kind of flexible direct current power transmission system automatic blocking method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410299304.2A CN104092299B (en) | 2014-06-26 | 2014-06-26 | A kind of flexible direct current power transmission system automatic blocking method |
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| CN104092299A true CN104092299A (en) | 2014-10-08 |
| CN104092299B CN104092299B (en) | 2016-08-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655073A (en) * | 2016-11-07 | 2017-05-10 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Converter station pole control system inter-electrode and inter-station communication redundancy apparatus and inter-electrode and inter-station communication method |
| CN111352374A (en) * | 2020-03-26 | 2020-06-30 | 青岛中加特电气股份有限公司 | Locking query device and using method thereof |
| CN111413898A (en) * | 2020-03-20 | 2020-07-14 | 青岛中加特电气股份有限公司 | Latching bus triggering and inquiring equipment and method |
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| CN102856897A (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 | Method and strategy for stopping three-end flexible DC power transmission system |
| CN102983568A (en) * | 2012-11-12 | 2013-03-20 | 华北电力大学 | Modular multilevel converter high voltage direct current (MMC-HVDC) converter station starting method used for power network black start |
| CN103618330A (en) * | 2013-11-27 | 2014-03-05 | 南方电网科学研究院有限责任公司 | Method for multi-port flexible high voltage direct current transmission system electrified connection through disconnecting switch |
| CN103762612A (en) * | 2013-11-27 | 2014-04-30 | 南方电网科学研究院有限责任公司 | Live access method for multi-terminal flexible direct current transmission system through disconnecting switch |
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2014
- 2014-06-26 CN CN201410299304.2A patent/CN104092299B/en active Active
Patent Citations (4)
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| CN102856897A (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 | Method and strategy for stopping three-end flexible DC power transmission system |
| CN102983568A (en) * | 2012-11-12 | 2013-03-20 | 华北电力大学 | Modular multilevel converter high voltage direct current (MMC-HVDC) converter station starting method used for power network black start |
| CN103618330A (en) * | 2013-11-27 | 2014-03-05 | 南方电网科学研究院有限责任公司 | Method for multi-port flexible high voltage direct current transmission system electrified connection through disconnecting switch |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655073A (en) * | 2016-11-07 | 2017-05-10 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Converter station pole control system inter-electrode and inter-station communication redundancy apparatus and inter-electrode and inter-station communication method |
| CN111413898A (en) * | 2020-03-20 | 2020-07-14 | 青岛中加特电气股份有限公司 | Latching bus triggering and inquiring equipment and method |
| CN111413898B (en) * | 2020-03-20 | 2021-11-16 | 青岛中加特电气股份有限公司 | Latching bus triggering and inquiring equipment and method |
| CN111352374A (en) * | 2020-03-26 | 2020-06-30 | 青岛中加特电气股份有限公司 | Locking query device and using method thereof |
| CN111352374B (en) * | 2020-03-26 | 2021-11-16 | 青岛中加特电气股份有限公司 | Locking query device and using method thereof |
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| CN104092299B (en) | 2016-08-24 |
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