CN105071395A - High-voltage distribution network load transfer method based on power supply path logic search - Google Patents
High-voltage distribution network load transfer method based on power supply path logic search Download PDFInfo
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- CN105071395A CN105071395A CN201510451186.7A CN201510451186A CN105071395A CN 105071395 A CN105071395 A CN 105071395A CN 201510451186 A CN201510451186 A CN 201510451186A CN 105071395 A CN105071395 A CN 105071395A
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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Abstract
The invention discloses a high-voltage distribution network load transfer method based on power supply path logic search, comprising the following steps: acquiring the topology of a current distribution network; judging whether the power points in the current distribution network are overload; acquiring a direction constraint set, a mutual exclusion constraint set and a sequence constraint set formed by the closed-loop path of all the power points through deep search, wherein the direction constraint set, the mutual exclusion constraint set and the sequence constraint set on the closed-loop path should be met when the load of each overload power point on a load transfer path is transferred; judging whether load transfer of each overload power point is completed within a preset number of load transfer times; and reducing the load of each overload power point if the goal of load transfer is not completed. By adopting the method of the invention, load can be transferred automatically, and dispatch personnel do not need to transfer load frequently by experience.
Description
Technical field
The present invention relates to the scheduling controlling of field of distribution network, be specifically related to a kind of high voltage distribution network load transfer method based on supply path Boolean Search.
Background technology
Along with Urbanization in China is accelerated, swift and violent with resident, financial industry and commerce, service trade, the high-end cities and towns load developed recently being fabricated to representative.But due to passage restriction, many reasons such as drop point is not enough, the duration is delayed, construction is obstructed, high voltage distribution network construction is difficult to the appropriate advance ensured in each local city load growth.Meeting peak or visual plant maintenance, during technological transformation, the operation risk that off-capacity or load inequality cause progressively manifests.
In addition the power transmission network section temporarily steady 220kV network congestion caused with the steady limit of heat, the city that power density is higher had to take frequently in peak period, or even large area turns for operating, to expand electrical network actual support ability.This brings huge workload to dispatcher, owing to lacking the calculation analysis tools for high voltage distribution network feature at present, dispatcher is that the strategy gathered based on work all the year round accumulative operating experience or examination is dispatched when dispatching, cause during scheduling and be difficult to search for comparatively complete set of feasible solution and prioritization scheme, even may bring potential risk because trend significantly changes.
Summary of the invention
For above-mentioned deficiency of the prior art, the invention provides a kind of high voltage distribution network load transfer method based on supply path Boolean Search that can be reprinted away by the overload load of power supply point automatically and accurately.
For above-mentioned deficiency of the prior art, the technical solution used in the present invention is:
There is provided a kind of high voltage distribution network load transfer method based on supply path Boolean Search, it comprises the following steps:
Obtain topological structure and the trip information of current power distribution network;
Judge whether the power supply point in current power distribution network exists traffic overload:
If exist, obtained the direction constrain collection, mutual exclusive restrict collection and the sequence constraint collection that are formed by all power supply point closed loop paths by deep search;
The closed loop path simultaneously meeting direction constrain collection, mutual exclusive restrict collection and sequence constraint collection is adopted to carry out load transfer operation to the power supply point of traffic overload;
Judge that the power supply point of traffic overload is turning for whether completing load transfer in number of operations in advance:
If do not complete load transfer, the operation of load off-load is carried out to the power supply point of traffic overload.
Beneficial effect of the present invention is: by topology and the trip information of Real-time Collection power distribution network, when there is the situation of power supply point traffic overload, the closed loop path met the demands by searching for each power supply point carries out turning confession, make the load of each power supply point lower than its specified loading load, adopt this method can automatically, exactly by the situation of traffic overload in load transfer elimination power distribution network, do not need dispatcher to carry out load transfer operation continually by rule of thumb.
After the overload load of power distribution network is reprinted away, the load that some power supply points load is too high, some loadings lower again, if adjust the power supply point loading load higher not in time, in the next moment, load the higher power supply point of load and very likely occur overload, then the power supply point of overload carry out turning for after, this method also by the load of the whole power distribution network power supply point of adjustment, makes the load balancing of each power supply point.
In load transfer and load balancing process, the method can record the number of times (turning the number of times of adjustment power supply point when supplying) of this scheduling operation and the sequencing of each power supply point scheduling operation, with the concrete operations situation facilitating dispatcher to get information about load transfer.
Accompanying drawing explanation
Fig. 1 is the flow chart of the high voltage distribution network load transfer method based on supply path Boolean Search.
Fig. 2 is the topological diagram structural representation that the height of one embodiment of the invention is press-fitted power distribution network.
Fig. 3 is the high voltage distribution network Basic Topological signal of another embodiment of the present invention.
Embodiment
Below the specific embodiment of the present invention is described; so that those skilled in the art understand the present invention; but should be clear; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various change to limit and in the spirit and scope of the present invention determined, these changes are apparent, and all innovation and creation utilizing the present invention to conceive are all at the row of protection in appended claim.
Show the flow chart of the high voltage distribution network load transfer method based on supply path Boolean Search with reference to figure 1, Fig. 1, as shown in Figure 1, the method comprises the following steps:
Obtain topological structure (can reference diagram 2) and the trip information of current power distribution network; Because certain change can be there is in each moment of load be carried in power distribution network on each power supply point, break down to evade power supply point, ensure the normal operation of power supply point, need the topological diagram paying close attention to high voltage distribution network at any time, once find that the power supply point of traffic overload just needs to be gone out by load transfer timely; And topological structure and the real-time loading condition grasping power supply point of trip information ability of power distribution network must be relied on when load is reprinted.
Judge whether the power supply point in current power distribution network exists traffic overload:
If exist, obtained the direction constrain collection, mutual exclusive restrict collection and the sequence constraint collection that are formed by all power supply point closed loop paths by deep search; Power supply point is when carrying out load transfer, and load transfer can both be gone out by not every supply path, so needed to search out the closed loop path that can be gone out by load transfer smoothly before carrying out load transfer.
In one embodiment of the invention, the concrete acquisition methods of said sequence constraint set is:
Deep search is carried out to the power supply point in current power distribution network, obtains the distribution capacity unit of the main confession of power supply point; With reference to figure 3, the A station come shown in figure, B station, C station and D station are the transformer station of 220KV, these transformer stations are exactly the power supply point that this method is mentioned, (S1,1), (S1,2), (S2,1), (S2,2), (S3,1), (S3,2), (S4,1) and (S4,2) be distribution capacity unit in power distribution network (combination that distribution capacity unit is transformer in 110kV transformer station and institute's on-load thereof), and S1 is the 110kV transformer station of A station owner confession, S4 is the 110kV transformer station of B station owner confession, and S3 is the 110kV transformer station of C station owner confession.
The supply path of distribution capacity unit all power supply points in power distribution network of the main confession of power supply point is obtained by deep search, refer again to Fig. 3, with the distribution capacity unit (S2 of A station owner confession, 2) for example is described its supply path, wherein, (S2, 2) → (S2, 1) → (S1, 2) → (S1, 1) → A, (S2, 2) → (S2, 1) → (S1, 2) → B, (S2, 2) → (S4, 1) → (S4, 3) → (S4, 1) → B, (S2, 2) → (S3, 1) → C, (S2, 2) → (S2, 1) → (S1, 2) → (S1, 1) → C, (S2, 2) → (S3, 1) → (S3, 2) → D is just main for distribution capacity unit (S2, 2) to the supply path of all power supply points, amount to 6.
Merge the supply path of distribution capacity unit to any two power supply points, form closed loop path; Still with the distribution capacity unit (S2 of confession main in Fig. 3,2) for example is described closed loop path, to distribution capacity unit (S2,2) closed loop path that the supply path of standing to any two power supply points A, B carries out merging rear formation is: A station → (S1,1) → (S1,2) → (S2,1) →
ts2,2) → B stands, and A station → (S1,1) → (S1,2) → (S2,1) → (S2,2) → (S4,1) → (S4,3) → B stands.
Based on order constrained condition principle, the closed loop path meeting order constrained condition is stored to sequence constraint and concentrates; Wherein, order constrained condition is: when being positioned at that on same closed loop path, distribution capacity unit carries out load transfer to power supply point, and the load transfer operation of the distribution capacity unit of adjacent objects power supply point should prior to the distribution capacity unit of its rear end wide power supply point.
For the closed loop path C station → S3 of the distribution capacitance cell S 3 of the main confession of the power supply point in Fig. 3 → D station, order constrained condition is further illustrated below, as (the S3 in S3,1) when needing to carry out load transfer to D station, (S3 in necessary S3,2) (S3,1) while turning confession to D station in S3 could carry out load transfer to D station.
In another embodiment of the present invention, the concrete acquisition methods of above-mentioned direction constrain collection is:
Based on direction constrain condition principle, the closed loop path meeting direction constrain is stored to direction constrain and concentrates; Wherein, direction constrain condition is: same distribution capacity unit is when having two and above load transfer direction is available, and it only can select one to turn for path.Be in particular: distribution capacity unit can not turn confession to two or more power supply point simultaneously.
The acquisition methods of mutual exclusive restrict collection is: according to the closed loop path of power supply point, obtains each power supply point in current power distribution network and has the power supply point of communication relationship with it; With reference to figure 2, for B station, have the power supply point of communication relationship to have A stands, C stands, D stands and E station with it.
Judge power supply point and have the power supply point of communication relationship whether to have identical distribution capacity unit with it, concrete is, B station → b3 → b4 → a6 → a5 → A stands with A at station → and a5 → a6 → b4 → b3 → B stands, these two closed loop paths all have the distribution capacity unit be made up of b3, b4, a6, a5, and a6 and b4 is the most adjacent two the distribution capacity unit by available Path Connection.
If have, based on mutual exclusive restrict condition, identical closed loop path is stored to mutual exclusive restrict by two the most adjacent distribution capacity unit of available Path Connection concentrates having.
Wherein, mutual exclusive restrict condition is: have when identical closed loop path carries out load transfer by two the most adjacent distribution capacity unit of available Path Connection, can not carry out turning to the both direction of this closed loop path supplying simultaneously; Also, namely when load transfer is from B station → b4 → A station, must not occur that load transfer is, when A station → a6 → B stands or load transfer is from A station → a6 → B station, must not occur that load transfer is B station → b4 → A station.
The above-mentioned main confession path mentioned is that distribution capacity unit obtains the supply path of electric energy from power supply point or other distribution capacity unit, as A station → a5, a5 in Fig. 2 → a6 two solid-line paths.
Backup path is distribution capacity unit likely obtains electric energy supply path from other power supply points or other distribution capacity unit, but current and do not obtain electric energy through it, as A station → a5, a5 in Fig. 2 → a6 two dashed path.
The closed loop path simultaneously meeting direction constrain collection, mutual exclusive restrict collection and sequence constraint collection is adopted to carry out load transfer operation to the power supply point of traffic overload; Namely turning of adopting when carrying out load transfer must be present in the concentrated closed loop path of direction constrain collection, mutual exclusive restrict collection and sequence constraint for path simultaneously.
Judge the power supply point of traffic overload is turning whether complete load transfer in number of operations (turning the number of times that can often carry out turning confession according to dispatcher in scheduling process before for number of operations in advance to set) in advance:
When power supply point completes load transfer, or power supply point does not complete load transfer and (namely repeatedly turns for operation by the method, the load that this power supply point loads still overloads), the operation of load off-load is carried out (when ensureing that power supply point runs well to the power supply point of traffic overload, then need to close the load loaded thereon by force) after, just complete the power supply point load transfer of power distribution network.
After the power supply point load transfer of power distribution network has operated, although the situation of overload may not be there is in the load of each power supply point, but it is then very low that the load that some power supply points load may very highly have, for the very high power supply point of load loaded very easily may load load thereon a little a change conditions just there is the phenomenon of overload, in order to evade this phenomenon, after carrying out load transfer and completing, also need to carry out equilibrium to the load that power supply point loads.
This method also comprises the load whether equalization step of all power supply points judged in current power distribution network:
If unbalanced, the closed loop path simultaneously meeting direction constrain collection, mutual exclusive restrict collection and sequence constraint collection is adopted to carry out load transfer operation to the unbalanced power supply point of load, until the load balancing of all power supply points in current power distribution network.
In one embodiment of the invention, in load transfer and load balancing process, the concrete operations situation of load transfer is got information about for convenience of dispatcher, after the load balancing of power supply points all in current power distribution network, also need recording power point from the operating sequence transferring power supply point when the load transfer number of operations existed traffic overload to power distribution network in all power supply point load balancing processes and load transfer.
In sum, adopt this method automatically can carry out load transfer to the power supply point of traffic overload, do not need dispatcher to carry out load transfer continually by rule of thumb.
Claims (7)
1., based on the high voltage distribution network load transfer method of supply path Boolean Search, it is characterized in that, comprise the following steps:
Obtain topological structure and the trip information of current power distribution network;
Judge whether the power supply point in current power distribution network exists traffic overload:
If exist, obtained the direction constrain collection, mutual exclusive restrict collection and the sequence constraint collection that are formed by all power supply point closed loop paths by deep search;
The closed loop path simultaneously meeting direction constrain collection, mutual exclusive restrict collection and sequence constraint collection is adopted to carry out load transfer operation to the power supply point of traffic overload;
Judge that the power supply point of traffic overload is turning for whether completing load transfer in number of operations in advance:
If do not complete load transfer, the operation of load off-load is carried out to the power supply point of traffic overload.
2. high voltage distribution network load transfer method according to claim 1, it is characterized in that, also comprise: whether balanced when load completes if turn for or all entering after carrying out the operation of load off-load to the power supply point of traffic overload the load of all power supply points judged in current power distribution network;
If unbalanced, the closed loop path simultaneously meeting direction constrain collection, mutual exclusive restrict collection and sequence constraint collection is adopted to carry out load transfer operation to the unbalanced power supply point of load, until the load balancing of all power supply points in current power distribution network.
3. high voltage distribution network load transfer method according to claim 2, is characterized in that, also comprise:
After the load balancing of power supply points all in current power distribution network, recording power point from traffic overload to power distribution network load transfer number of operations in all power supply point load balancing processes and load transfer time transfer the operating sequence of power supply point.
4., according to the arbitrary described high voltage distribution network load transfer method of claim 1-3, it is characterized in that, the acquisition methods of described sequence constraint collection is:
Deep search is carried out to the power supply point in current power distribution network, obtains the distribution capacity unit of the main confession of power supply point;
The supply path of distribution capacity unit all power supply points in power distribution network of the main confession of power supply point is obtained by deep search;
Merge the supply path of distribution capacity unit to any two power supply points, form closed loop path;
Based on order constrained condition principle, the closed loop path meeting order constrained condition is stored to sequence constraint and concentrates;
Wherein, order constrained condition is: when the distribution capacity unit be positioned on same closed loop path carries out load transfer to power supply point, and the load transfer operation of the distribution capacity unit of adjacent objects power supply point should prior to the distribution capacity unit of its rear end wide power supply point.
5. high voltage distribution network load transfer method according to claim 4, is characterized in that, the acquisition methods of described direction constrain collection is:
Based on direction constrain condition principle, the closed loop path meeting direction constrain is stored to direction constrain and concentrates; Wherein, direction constrain condition is: same distribution capacity unit is when having two and above load transfer direction is available, and it only can select one to turn for path.
6. high voltage distribution network load transfer method according to claim 4, is characterized in that, the acquisition methods of described mutual exclusive restrict collection is:
According to the closed loop path of power supply point, obtain each power supply point in current power distribution network and have the power supply point of communication relationship with it;
Judge power supply point and have the power supply point of communication relationship whether to have identical distribution capacity unit with it:
If have, identical closed loop path is stored to mutual exclusive restrict by two the most adjacent distribution capacity unit of available Path Connection concentrates having;
Wherein, mutual exclusive restrict condition is: have when identical closed loop path carries out load transfer by two the most adjacent distribution capacity unit of available Path Connection, can not carry out turning to the both direction of this closed loop path supplying simultaneously.
7. the high voltage distribution network load transfer method according to claim 5 or 6, is characterized in that, described power supply point is 220kV transformer station, the combination that distribution capacity unit is transformer in 110kV transformer station and institute's on-load thereof.
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Effective date of registration: 20181206 Address after: 610000 No. 19, 23rd floor, Block B, Shiwaitaoyuan Square, Scientific Research Complex Building, Sichuan University, 65 Kebei Road, Wuhou District, Chengdu City, Sichuan Province Patentee after: Sichuan Zhiyuan Xinneng Technology Co., Ltd. Address before: 610000 No. 24, South Part 1, first ring road, Chengdu, Sichuan Patentee before: Sichuan University |