CN102769338B - Closed-loop operational control method for power distribution network - Google Patents
Closed-loop operational control method for power distribution network Download PDFInfo
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- CN102769338B CN102769338B CN201210257852.XA CN201210257852A CN102769338B CN 102769338 B CN102769338 B CN 102769338B CN 201210257852 A CN201210257852 A CN 201210257852A CN 102769338 B CN102769338 B CN 102769338B
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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
- Y04S10/16—Electric power substations
Abstract
The invention discloses a closed-loop operational control method for a power distribution network. The closed-loop operational control method comprises the steps of: measuring and acquiring voltage analog quantity and position signal quantity of a hand-in-hand power distribution network switch by a feeder terminal unit (FTU), and uploading the measured and calculated data (comprising a closed-loop operation permission flag) to a distribution network main station through a sub-station or directly uploading the data to the distribution network main station; when the load is transferred and a switch is back-braked, according to the data (comprising the closed-loop operation permission flag) of an interconnection switch acquired by the distribution network main station, whether an closed-loop operation is carried out can be automatically determined or determined by a dispatcher manually. By adopting the closed-loop operational control method, an operation mode that when the conventional power distribution network load is transferred and the switch is back-braked, short-time power failure is carried out can be overcome, and purpose that when the load is transferred and the switch is back-braked, distribution network user terminals (part of users related with a back-braked switch) can operate without power failure can be achieved.
Description
Technical field
The invention belongs to electric power system distribution operation control field, particularly a kind of distribution back brake Loop Closing Operation progress control method of two (many) Power supplies.
Background technology
The current urban power distribution network construction of China is swift and violent, the master supervisory system of power distribution network is gradual perfection technically, in many cities, progressively build and have distribution network master station supervisory control system at present, but also do not have at present for the cyclization operational management of power distribution network, to control specially, especially when load transfer, general equal very important person is power failure back brake, cause certain customers to have a power failure in short-term, partial design even requires to force to carry out hardware crossing blocking, strictly forbid cyclization operation, short circuit current and non-Switching Synchronization when reducing fault.
In view of aforementioned analysis, the present invention proposes a kind of operation for two (many) power supplys power distribution network and controls thinking, when load transfer panel switches back brake, according to cyclization, allow diagnostic criterium, realize cyclization operation, power supply reliability, without having a power failure in short-term, improves in the certain customers that are connected with back brake switch.
Summary of the invention
Main purpose of the present invention, is to provide a kind of distribution back brake operational management control system and method for two (many) Power supplies, and the operational mode that it needs user's side to have a power failure in short-term in the time of can overcoming existing distribution grid switching operation reaches the object of raising power supply reliability.
In order to reach above-mentioned purpose, solution of the present invention is:
A closed loop network progress control method, comprises the steps:
(1) by feeder line detection and control terminal FTU, the voltage analog of each switch of power distribution network and switch position signal amount are measured to collection, and the voltage analog of switch both sides is compared to calculating, according to result of calculation, judge whether to allow to carry out Loop Closing Operation, when allowing Loop Closing Operation, put cyclization and allow flag bit, otherwise, clear cyclization allows flag bit, and it is that cyclization allows flag bit to be uploaded to distribution substation or to be directly uploaded to distribution main website by communication network that FTU allows the result of calculation of criterion by measurement data, involutive ring operation the same period;
Wherein, described Loop Closing Operation allows criterion as follows the same period:
The corresponding voltage mould value of A, switch both sides is all greater than amplitude setting value;
B, switch both sides corresponding voltage mould value difference are less than mould value difference setting value;
C, switch both sides corresponding voltage phase difference are less than phase difference setting value;
When all satisfying condition for above-mentioned three, allow switch to carry out Loop Closing Operation, put cyclization and allow flag bit; Otherwise, do not allow to carry out Loop Closing Operation, remove cyclization and allow flag bit;
(2) distribution main website is according to maintenance scheduling, or Distribution Network Load Data transfer plan, carry out load transfer back brake, the cyclization that judgement need to be carried out the switch of Loop Closing Operation allows whether set of flag bit, in the time need to carrying out the cyclization of the switch of Loop Closing Operation and allow flag bit set, and the position of the switch remote signalling in corresponding transformer station is while being co-bit, first drops into the switch that need to carry out Loop Closing Operation, be interconnection switch, and then disconnect the switch needing in maintenance or traffic overload Yi Ce transformer station;
(3) distribution main website drops into the location status of switch on the circuit hand in hand after interconnection switch by feeder line detection and control terminal FTU real time monitoring, if differentiate for cyclization operation and cyclization are greater than set point running time, sends out alarm signal to point out long-time cyclization operation.
Adopt after such scheme, the closed loop network operation control method that the present invention proposes, can automatically effectively solve user that power distribution network switch causes when the switch back brake due to load transfer power cut problem in short-term, thereby improve power supply reliability, reduce outage rate.
In addition; during the operation of panel switches back brake; also may there is the carelessness because of traffic control or operating personnel; forget the situation that disconnects interconnection switch and cause long-term cyclization (closed loop) operation; bring hidden danger to relaying protection and the safe operation of electric power system, so can also the increase electric power safe running performance of system of the present invention.
Accompanying drawing explanation
Fig. 1 is the flow chart of closed loop network operation control method of the present invention;
Fig. 2 is closed loop network operation line construction schematic diagram hand in hand.
Embodiment
Below with reference to drawings and the specific embodiments, the course of work of the present invention and beneficial effect are elaborated.
In power distribution network framework, conventionally use the Double-End Source martingale of handing in hand, the selection of interconnection switch or definition can be selected arbitrarily arbitrary switch, and the S24 switch that in diagram 2, FTU4 is corresponding is interconnection switch.
First with reference to shown in figure 2, the present invention is based on a kind of closed loop network operation automatic control system, comprise a distribution main website, at least two substations and at least three feeder line detection and control terminals (FTU), wherein, all feeder line detection and control terminals (FTU) are distributed setting, and each feeder line detection and control terminal (FTU) is respectively used to measure the related data amount of switch separately, and all feeder line detection and control terminals (FTU) are also connected to substation or are directly uploaded to main website by communication, the remote measure and communication data volume of transformer station exit switch is separately measured respectively in substation, and be connected to distribution main website by communication, distribution main website controls the switching of interconnection switch S24 by detection and control terminal FTU4 corresponding to interconnection switch, according to the data of feeder line detection and control terminal (FTU4) measurement and calculation, carry out the operation of switch back brake switching.
As shown in Figure 1, be to the present invention is based on a kind of closed loop network progress control method that aforementioned closed loop network operation automatic control system provides, comprise the steps:
(1) coordinate shown in Fig. 2, all feeder line detection and control terminals (FTU) are measured collection to the telemetry amount of power distribution network switch (specifically referring to switching value and switch both sides voltage), and the data of measurements and calculations (calculate and specifically refer to that Loop Closing Operation allows to differentiate the same period) are uploaded to substation or are directly uploaded to distribution main website by communication;
Loop Closing Operation allows criterion according to measured value, to calculate judgement in feeder line detection and control terminal FTU the same period, and FTU4 corresponding to S24 switch in Fig. 2 of take is example, and FTU4 measures the voltage of switch S 24 both sides, and what suppose voltage analog collection is line voltage.Loop Closing Operation allows criterion as follows the same period:
The voltage of A, S24 switch both sides is all greater than setting value (such as 70V, or 70% rated voltage);
The voltage-mode value difference of B, switch both sides is less than setting value (such as 5V);
The poor setting value (such as 10 degree) that is less than of level angle of C, switch both sides
When above-mentioned A, B, C all satisfy condition, to put cyclization and allow flag bit, synchronous operation allows; Otherwise clear cyclization allows flag bit, and Loop Closing Operation does not allow.
It should be noted that, the relevant parameter adopting in step (1) can be adjusted flexibly and set according to the real account definite value of PT or other demands, to adapt to the needs of different situations.
(2), before switch back brake is implemented, the Loop Closing Operation that dispatcher gathers and calculates according to feeder line detection and control terminal allows sign the same period, throws interconnection switch, then cuts switch to be isolated, to reduce customer outage hours, reaches the object that improves power supply reliability.
If K25 switch is intended schedule maintenance maintenance, or during the transformer overload of the A of transformer station, plan turns confession by end load under K25 by the B of transformer station, now as example, illustrates.
If first disconnected K25 switch closes S24 switch again, must cause certain customers' (being the user between S21 and S24) to have a power failure in short-term.With the operation of this control program, the Loop Closing Operation that gathers and calculate according to the feeder line detection and control terminal FTU4 corresponding with interconnection switch S24 allows to indicate the same period, is, while allowing operation flag, first to throw interconnection switch S24, then cuts pass K25 when FTU4 detects; So just, can make the unlikely power failure in short-term of user between S21 and S24.
If oppositely turn while supplying (B of the transformer station transformer overload Yu You A of transformer station transformer turns confession), in like manner, when FTU4 sends permission operation flag, first throw interconnection switch S24, then cut pass K44.
(3) distribution main website monitors the location status of switch on the circuit of handing in hand constantly, if differentiate for cyclization operation and be greater than set point (as 10 minutes), sends out alarm signal to point out long-time cyclization operation.
The criterion of cyclization operation is: all switches on loop line are co-bit hand in hand.Shown in Fig. 2, if K switch 25, S21～S27, K44 are co-bit, be judged as cyclization operation.
The time parameter adopting in above-mentioned steps (3) can be adjusted flexibly and set according to on-the-spot practical operation flow process speed, to adapt to the needs of different situations.
Other explanations, if PT is all equipped with in the both sides of all panel switches (as S21～S27) in Fig. 2, in Fig. 2 any one S(as S21～S27) switch in actual applications, all can regard interconnection switch as temporarily, any one FTU(FTU1～FTU7), all can measure sampling and calculating and upload its combined floodgate to inductive switch and allow flag bit, the cyclization operation control when realizing the load transfer grid switching operation of all kinds of situations, such use has stronger generalization.
Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection range of the present invention.
Claims (4)
1. a closed loop network progress control method, comprises the steps:
(1) by feeder line detection and control terminal FTU, the voltage analog of each switch of power distribution network and switch position signal amount are measured to collection, and the voltage analog of switch both sides is compared to calculating, according to result of calculation, judge whether to allow to carry out Loop Closing Operation, when allowing Loop Closing Operation, put cyclization and allow flag bit, otherwise, clear cyclization allows flag bit, and it is that cyclization allows flag bit to be uploaded to distribution substation or to be directly uploaded to distribution main website by communication network that FTU allows the result of calculation of criterion by measurement data, involutive ring operation the same period;
Wherein, described Loop Closing Operation allows criterion as follows the same period:
The corresponding voltage mould value of A, switch both sides is all greater than amplitude setting value;
B, switch both sides corresponding voltage mould value difference are less than mould value difference setting value;
C, switch both sides corresponding voltage phase difference are less than phase difference setting value;
When all satisfying condition for above-mentioned three, allow switch to carry out Loop Closing Operation, put cyclization and allow flag bit; Otherwise, do not allow to carry out Loop Closing Operation, remove cyclization and allow flag bit;
(2) distribution main website is according to maintenance scheduling, or Distribution Network Load Data transfer plan, carry out load transfer back brake, the cyclization that judgement need to be carried out the switch of Loop Closing Operation allows whether set of flag bit, in the time need to carrying out the cyclization of the switch of Loop Closing Operation and allow flag bit set, and the position of the switch remote signalling in corresponding transformer station is while being co-bit, first drops into the switch that need to carry out Loop Closing Operation, be interconnection switch, and then disconnect the switch needing in maintenance or traffic overload Yi Ce transformer station;
(3) distribution main website drops into the location status of switch on the circuit hand in hand after interconnection switch by feeder line detection and control terminal FTU real time monitoring, if differentiate for cyclization operation and cyclization are greater than set point running time, sends out alarm signal to point out long-time cyclization operation.
2. closed loop network progress control method according to claim 1, is characterized in that:
In described step (1), described amplitude setting value is 70% load voltage value;
Described mould value difference setting value is 5V;
Described phase difference setting value is 10 degree.
3. closed loop network progress control method according to claim 1, is characterized in that:
In step (3), described set point is 10 minutes.
4. according to the closed loop network progress control method described in the arbitrary claim of claim 1-3, it is characterized in that:
When PT is all equipped with in any switch both sides between Dang Liang transformer station on circuit, can be as the switch that carries out Loop Closing Operation, i.e. interconnection switch.
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| CN201210257852.XA CN102769338B (en) | 2012-07-20 | 2012-07-20 | Closed-loop operational control method for power distribution network |
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| CN201210257852.XA CN102769338B (en) | 2012-07-20 | 2012-07-20 | Closed-loop operational control method for power distribution network |
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Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104182815B (en) * | 2012-10-22 | 2017-04-05 | 国网山东省电力公司青岛供电公司 | A kind of power supply reliability acquisition methods and system |
| CN103236695B (en) * | 2013-04-28 | 2015-04-29 | 国家电网公司 | Power distribution network loop closing current switching method and device, and power distribution terminal |
| CN103560513A (en) * | 2013-11-21 | 2014-02-05 | 国家电网公司 | Method and device for determining loop closing time |
| CN104734352B (en) * | 2015-03-10 | 2017-06-20 | 国家电网公司 | A kind of distribution line Loop Closing Operation control method |
| CN104753063A (en) * | 2015-04-22 | 2015-07-01 | 国家电网公司 | Transformer substation bus load transferring method and system |
| CN104917160B (en) * | 2015-04-28 | 2017-06-20 | 北京四方继保自动化股份有限公司 | A kind of distributed feed line automatization system permissive type fault handling method based on FTU |
| CN105720606B (en) * | 2016-04-12 | 2018-02-16 | 贵州黔燎原电气科技有限公司 | A kind of control method of active power distribution network unperturbed cyclization for active power distribution network |
| CN106655191B (en) * | 2016-10-20 | 2019-09-24 | 广东电网有限责任公司电力调度控制中心 | The load sharing method and device of backup auto-activating device |
| CN106443436B (en) * | 2016-11-10 | 2019-03-19 | 国电南瑞科技股份有限公司 | Consider the switch distant control function detection method of solution cyclization risk and O&M aid decision |
| CN106787201A (en) * | 2016-12-30 | 2017-05-31 | 国网天津市电力公司 | A kind of closed loop network method that phase is determined based on remote online |
| CN107863821A (en) * | 2017-11-14 | 2018-03-30 | 国网安徽省电力公司六安市叶集供电公司 | A kind of distribution thermal conductivity cyclization detection method based on Cloud Server |
| CN108879951A (en) * | 2018-06-29 | 2018-11-23 | 国网河南省电力公司平顶山供电公司 | A kind of high-voltage circuitbreaker realizing cyclization and determining |
| CN109066985A (en) * | 2018-08-28 | 2018-12-21 | 云南电网有限责任公司电力科学研究院 | A kind of quick cyclization tune electric system and method |
| CN109444790B (en) * | 2018-10-29 | 2021-05-04 | 广西电网有限责任公司电力科学研究院 | Method suitable for feeder terminal to identify working state of power supply voltage transformer |
| CN110086255A (en) * | 2019-05-06 | 2019-08-02 | 广东电网有限责任公司 | A kind of distribution open loop point management method |
| CN110658376B (en) * | 2019-10-09 | 2022-09-23 | 国网江苏省电力有限公司 | Measurement and analysis method and system for distribution network line closed loop operation based on edge calculation |
| CN113449266B (en) * | 2021-07-22 | 2024-04-09 | 南方电网海南数字电网研究院有限公司 | Closed loop power supply statistical method based on hand-in-hand line |
| CN114512967B (en) * | 2022-01-26 | 2023-11-14 | 浙江双成电气有限公司 | Distribution network protection and automation device and precise and rapid ring opening and closing method for distribution network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009076410A1 (en) * | 2007-12-12 | 2009-06-18 | Abb Research Ltd. | Load restoration for feeder automation in electric power distribution systems |
| CN101860026B (en) * | 2010-05-28 | 2013-03-06 | 北京中恒博瑞数字电力科技有限公司 | Analysis method of electromagnetic loop closing and power reversing operation of urban distribution network |
| CN101908763B (en) * | 2010-07-23 | 2012-11-21 | 广东电网公司中山供电局 | Method for controlling distribution network closed loop |
| CN102496929A (en) * | 2011-12-23 | 2012-06-13 | 宁波电业局 | Method, device and system for closing and opening ring |
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