CN114421461A - Optimal algorithm-based power distribution network transfer auxiliary decision making system and method - Google Patents
Optimal algorithm-based power distribution network transfer auxiliary decision making system and method Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
Abstract
The utility model provides an optimal algorithm-based power distribution network power transfer auxiliary decision system and a method, wherein the system comprises a power supply capacity analysis system and a substation power loss power transfer and series supply decision system; power supply capability analysis system: the power supply system is configured to analyze the power supply capacity of the power-losing transformer substation and the auxiliary line thereof based on the topological relation of the feeder line ring network to obtain the number information of the ring network and the line contact relation; the decision system for power loss, transfer and series supply of the transformer substation: and performing iterative solution by using an optimal algorithm, and performing logic judgment on power loss transfer or serial supply of the transformer substation according to the line contact relation, so as to intelligently generate a transfer or serial supply plan after the distribution network key node fails. After the key nodes of the power distribution network lose power, intelligent generation can provide auxiliary decision for fault disposal, rapid response to power grid faults is achieved, and then the modernization level and the power supply service reliability level of the power distribution network are improved.
Description
Technical Field
The disclosure relates to the technical field of power distribution network scheduling, in particular to a power distribution network transfer auxiliary decision making system and method based on an optimal algorithm.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In a power distribution network, each substation belongs to a key node and an important support on a power supply path. The power loss of the transformer substation means that the total station and the load carried by the total station lose power, and under the current national policy of improving the feeling of users obtaining power and optimizing the environment of a power operator, how to rapidly solve the power grid fault and improve the power restoration efficiency is an urgent problem to be solved! The inventor finds that most of the existing power distribution network key nodes are transferred after power failure by adopting a manual scheduling method, multiple factors such as fault categories and power flow transfer need to be considered comprehensively under the manual scheduling, and as the power distribution network is enlarged in scale, the number of electrical equipment is increased, the power supply radius is increased, the line contact relation is complex and the like, the fault handling efficiency is slow, and the requirements of power grid operation and social development are difficult to meet.
Disclosure of Invention
In order to solve the problems, the power distribution network power transfer auxiliary decision system and method based on the optimal algorithm are provided, after the key nodes of the power distribution network lose power, auxiliary decisions can be intelligently generated for fault handling, the quick response to the power grid faults is realized, and the modernization level and the power supply service reliability level of the power distribution network are further improved.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
one or more embodiments provide an optimal algorithm-based power distribution network power transfer auxiliary decision system, which comprises a power supply capacity analysis system, a substation power loss power transfer and serial supply decision system;
power supply capability analysis system: the power supply system is configured to analyze the power supply capacity of the power-losing transformer substation and the auxiliary line thereof based on the topological relation of the feeder line ring network to obtain the number information of the ring network and the line contact relation;
the decision system for power loss, transfer and series supply of the transformer substation: and performing iterative solution by using an optimal algorithm, and performing logic judgment on power loss transfer or serial supply of the transformer substation according to the line contact relation, so as to intelligently generate a transfer or serial supply plan after the distribution network key node fails.
One or more embodiments provide an optimal algorithm-based power distribution network transfer auxiliary decision method, which includes the following steps:
analyzing the power supply capacity of the power-losing transformer substation and the auxiliary line thereof based on the topological relation of the feeder line ring network to obtain the number information of the ring network points and the line contact relation;
and performing logic judgment of power loss transfer or serial supply of the transformer substation according to the line contact relation by utilizing iterative solution of an optimal algorithm, and intelligently generating a transfer or serial supply plan after the distribution network key node fails.
Compared with the prior art, the beneficial effect of this disclosure is:
the method is based on the topological relation of the feeder ring network, the number information of the ring network points and the line contact relation are obtained through analysis, a supply transfer plan can be generated intelligently according to a selected power loss line and a reference day equipment load, the intelligent decision of a power grid operation mode considering the multi-section load control requirement is realized under the condition that a plurality of substations in a power grid section lose power by using a power grid operation optimal algorithm, and one-key generation of a distribution network load control scheme is achieved.
Advantages of the present disclosure, as well as advantages of additional aspects, will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure.
FIG. 1 is a system block diagram of embodiment 1 of the disclosure
FIG. 2 is a diagram of a system plan generation interface according to embodiment 1 of the present disclosure;
FIG. 3 is a flow chart of a method of embodiment 2 of the present disclosure;
the specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments in the present disclosure may be combined with each other. The embodiments will be described in detail below with reference to the accompanying drawings.
Example 1
In the technical solutions disclosed in one or more embodiments, as shown in fig. 1, the power distribution network transfer auxiliary decision system based on the optimal algorithm includes a power supply capacity analysis system, a substation power loss transfer and supply and series supply decision system;
power supply capability analysis system: the power supply system is configured to analyze the power supply capacity of the power-losing transformer substation and the auxiliary line thereof based on the topological relation of the feeder line ring network to obtain the number information of the ring network and the line contact relation;
the decision system for power loss, transfer and series supply of the transformer substation: and performing iterative solution by using an optimal algorithm, and performing logic judgment on power loss transfer or serial supply of the transformer substation according to the line contact relation, so as to intelligently generate a transfer or serial supply plan after the distribution network key node fails.
According to the method, the number information of the looped network points and the line contact relation are obtained through analysis based on the topological relation of the feeder looped network, a supply transfer plan can be generated intelligently according to the selected power loss line and the reference day equipment load, the intelligent decision of the power grid operation mode considering the multi-section load control requirement is realized under the condition that a plurality of substations in the power grid section lose power by using a power grid operation optimal algorithm, and one-key generation of a distribution network load control scheme is achieved.
In some embodiments, the power supply capability analysis system mainly comprises a data acquisition layer, a data processing layer and a system display layer.
A data acquisition layer: the data interface established between the OMS, the PES, the MIS and the like is configured to acquire data of each power grid operation system;
a data processing layer: the data mining system is configured to perform data integration on the acquired data of the operating system, and data classification modularization processing analysis is performed by applying a data mining technology to obtain the power supply capacity of the power distribution network;
optionally, the power supply capacity of the power distribution network includes information such as a line operation condition and a network rack contact point condition, where the network rack contact point condition includes a ring network point quantity information and a line contact relationship;
a system display layer: is configured for modular exhibition of the power supply capacity of the power distribution network.
Optionally, the data processing layer includes a data cleaning module, a loading module and a data processing module.
A data cleansing module configured to: and the methods of data type conversion, data comparison, data association relation search and the like are adopted to complete the cleaning of incomplete data, error data and repeated data, and realize the accurate extraction of correct data.
The loading module can be configured to utilize the high-performance parallel loading and DBLOAD standard data loading functions to realize the rapid loading of massive power grid operation data, and the system operation efficiency is improved.
The data processing module can be configured to establish a mapping relation for data, unify and aggregate the data according to coding rules, data units and data types, and perform logic calculation according to business requirements and rule support to obtain a line operation condition and a net rack contact point condition;
specifically, the same type data of the transformer substations, buses, lines, switches, disconnecting links and the like of different service systems are mapped into an association table through association relations such as names, codes and the like, then unified processing and aggregation processing are carried out according to coding rules, units and data types, and then calculation of complex service logic is supported according to service requirements and rules, and the obtained main content of the network frame contact point condition can include:
(1)10kV line number: and all 10kV lines supplied by the regional transformer substation or the main transformer are counted.
(2) The number of the lines which can communicate with 10kV is as follows: a10 kV line powered by a regional transformer substation or a main transformer and an extra-regional 10kV line are connected.
(3) Number of non-contact 10kV lines: and the 10kV line powered by the regional transformer substation or the main transformer and the 10kV line outside the region are not in contact.
(4) The transformer substation can rotate 10kV line returns: the 10kV line powered by the regional transformer substation or the main transformer and the 10kV line outside the region are communicated, and the line which cannot cause overload after power supply conversion is considered.
(5) The 10kV line number of turns can not be turned by the transformer substation: and subtracting the number of the 10kV lines which can be converted by the transformer substation from the number of the 10kV lines in the transformer substation.
The system further comprises a system database which is configured to store the power distribution network topology structure, the power distribution network transmission line related parameters, the transformer substation primary equipment parameters and the power grid operation data.
The topological structure of the power distribution network, relevant parameters (current-carrying capacity, wire model and the like) of a power distribution network transmission line and primary equipment parameters (a transformer, a bus, a switch and the like) of a transformer substation can be input in advance, and power grid operation data can be obtained in real time. The grid operating data may include the generated output and load of each node.
On the premise of ensuring that the topological structure of the power grid is unchanged and the power grid normally operates, the states of the tie switch and the section switch in the power grid are set to be 'on' and 'off', so that the power supply path can be quickly reconstructed and optimally selected when a certain point of the power grid fails.
And the power supply capacity analysis system analyzes the power supply capacity of the corresponding transformer substation and the affiliated 10kV line, and performs logic judgment on the power loss and power transfer system of the transformer substation according to the contact relation of the 10kV line. And a distribution network transfer scheme is automatically generated by one key under the condition of power loss of the transformer substation by utilizing a distribution network operation optimal algorithm.
Or, the power supply capability analysis system: if no contact relation exists among the 10kV lines, the method is configured to analyze the power supply capacity of the corresponding transformer substation and the affiliated 10kV lines, the logic judgment generated by the power-losing series power supply system of the transformer substation is carried out, and the one-key automatic generation of the distribution network series power supply scheme under the condition of power loss of the transformer substation is realized by utilizing the optimal operation algorithm of the distribution network.
Based on the topological relation of the feeder ring network, the number information of the ring network points and the line contact relation are obtained through analysis, a certain device is selected as a power-off device in the system, then a reference day is selected, the annual maximum current, the monthly maximum current, the daily maximum current or the current at any time point can be selected as the reference daily current, and a plan is generated according to the relation and is used for assisting decision making during fault.
Before the logic judgment of power loss transfer and serial supply of a transformer substation, a topological path capable of transfer or serial supply needs to be determined, and the method comprises the following steps:
11. sequentially selecting line equipment from power supply points forming a power grid, and excluding fault equipment; the line equipment comprises a power transmission and distribution line, a bus, a main transformer, a switch and the like.
12. And connecting the selected devices with the same endpoint numbers, and carrying out topology on the power grid according to the active power direction until the opposite-side ring network line with contact is obtained, and obtaining and storing a topology channel path except the fault device.
The method for logically judging the power loss and the power supply of the transformer substation specifically comprises the following steps:
21. and when the transformer substation is in voltage loss, all buses under the transformer substation are found through the topological connection relation.
22. Finding all lines under a 10kv bus, performing power transfer analysis according to the load condition of a reference day and the line contact relation, analyzing a topological path obtained by iterative solution according to an optimal algorithm, if the topological path has the contact relation with a power-off transformer and the power transfer does not exceed the load of the opposite line, storing the scheme, and if the power transfer exceeds the load of the opposite line, the power transfer is not possible.
And the optimal algorithm iterative solution step comprises the steps of finding all lines which are in contact with the fault line through the topological path, iterating all the lines, finding all the contact lines of which the sum of the lines on the two sides does not exceed the current-carrying capacity of the lines on the two sides according to the reference day, finding the line with the maximum margin of the opposite line in all the contact lines, namely the line with the maximum value obtained by subtracting the sum of the currents on the two sides from the current-carrying capacity, and setting the line as the optimal transfer line.
23. And summarizing all the transferable supply schemes, and storing the transferable supply schemes as the voltage-loss transfer supply schemes of the transformer substation.
The method for logically judging the power loss series supply of the transformer substation specifically comprises the following steps:
31. and when the transformer substation is in voltage loss, all buses under the transformer substation are found through the topological connection relation.
32. Finding all lines under a 10kv bus, performing power transfer analysis according to the load condition of a reference day and the line contact relation, performing analysis according to a topological path obtained by iterative solution of an optimal algorithm, if the topological path has the contact relation with a power-off transformer and the power transfer does not exceed the opposite-side line load, saving the scheme as a power transfer scheme, and if the power transfer exceeds the opposite-side line load, the power transfer is not possible. The method for analyzing the topological path obtained by iterative solution according to the optimal algorithm is the same as the above method.
33. Finding all lines which can not be supplied or are not connected, finding that the lines can be connected through the same bus, carrying out load analysis if the found lines are connected externally, and carrying out bus serial power supply recovery through the lines if the load does not exceed the lines on the side and does not exceed the lines on the opposite side.
34. And summarizing all the transfer schemes and the series supply schemes to form a voltage-loss series supply scheme of the transformer substation.
Further, the method for determining the scheme for converting the bus voltage loss into the power supply is further included, and the method comprises the following specific steps of analyzing 10kV lines of power supply to which 10kV buses belong based on SCADA (supervisory control and data acquisition), PMS line account data, marketing system user number data and distribution GIS (geographic information system) ring network account information, and generating the scheme for converting the bus voltage loss into the power supply according to the contact relation of the 10kV lines, wherein the scheme comprises the following steps:
41. finding all 10kv lines under a 10kv bus according to the topological connection relation of the power grid;
42. respectively finding out the connection lines of the 10kv lines, finding out the connection line with the largest margin according to the maximum current of the reference day, judging whether the current of the power-off line and the current of the opposite line exceed the current-carrying capacity of the opposite line, if not, storing the topology of the opposite line, if so, selecting the other line, and if not, the line can not be supplied; and generating a distribution network serial supply scheme according to the 10kV line without the contact relation.
43. And summarizing all the transfer schemes and the series supply schemes to form a bus voltage-loss transfer scheme.
In step 42, a distribution network serial supply scheme is automatically generated for the 10kV lines without contact relation, and whether the 10kV lines on the opposite side and the main network equipment are overloaded after the supply is automatically analyzed, which includes:
421. finding a line A which belongs to the same bus as the line through the connection relation of the line at the side, and finding a line A which has a connection relation with the outside of the station on the basis of the bus, wherein the current margin of the line A is the largest;
422. judging whether the opposite side line can be supplied in series or not according to rules, if the current-carrying capacity of the opposite side line is smaller than the current of the opposite side line and the current of the local side line, rejecting the opposite side line, and reselecting;
423. and finding out a line capable of supplying in series, and generating a line-to-power supply scheme.
In this embodiment, a circuit that needs to be switched or series-supplied for a power-off line is called a local circuit, and a circuit that switches or series-supplies for the local circuit is called an opposite circuit.
As shown in fig. 2, which is a system operation effect diagram of this embodiment, the system of this embodiment can generate a power-off transfer or series provision plan of the transformer in batch in the shortest time, and greatly improve the stability of power supply.
Example 2
Based on embodiment 1, this embodiment provides an optimal algorithm-based power distribution network transfer auxiliary decision method, as shown in fig. 3, including the following steps:
analyzing the power supply capacity of the power-losing transformer substation and the auxiliary line thereof based on the topological relation of the feeder line ring network to obtain the number information of the ring network points and the line contact relation;
and performing logic judgment of power loss transfer or serial supply of the transformer substation according to the line contact relation by utilizing iterative solution of an optimal algorithm, and intelligently generating a transfer or serial supply plan after the distribution network key node fails.
Optionally, the method for iterative solution by using an optimal algorithm includes the following steps:
sequentially selecting line equipment from power supply points forming a power grid, and excluding fault equipment;
and connecting the selected devices with the same endpoint numbers, and carrying out topology on the power grid according to the active power direction until the opposite-side ring network line with contact is obtained, and obtaining and storing a topology channel path except the fault device.
Optionally, the method for logically judging power loss and power supply of the transformer substation specifically includes:
and when the transformer substation is in voltage loss, all buses under the transformer substation are found through the topological connection relation.
Finding all lines under a 10kv bus, performing power transfer analysis according to the load condition of a reference day and the line contact relation, analyzing a topological path obtained by iterative solution according to an optimal algorithm, if the topological path has the contact relation with a power-off transformer and the power transfer does not exceed the load of the opposite line, storing the scheme, and if the power transfer exceeds the load of the opposite line, the power transfer cannot be performed;
and summarizing all the transferable supply schemes, and storing the transferable supply schemes as the voltage-loss transfer supply schemes of the transformer substation.
Optionally, the method for logically judging the power loss and the serial power supply of the transformer substation specifically comprises the following steps:
when the transformer substation is in voltage loss, finding all buses under the transformer substation through the topological connection relation;
finding all lines under a 10kv bus, performing power transfer analysis according to the load condition of a reference day and the line contact relation, performing analysis according to a topological path obtained by iterative solution of an optimal algorithm, if the topological path has the contact relation with a power-off transformer and the power transfer does not exceed the opposite-side line load, saving the scheme as a power transfer scheme, and if the power transfer exceeds the opposite-side line load, not performing power transfer;
finding all the lines which can not be supplied or are not connected, finding that the lines can be connected through the same bus, and the found lines are connected to the outside, carrying out load analysis, and if the load does not exceed the line at the side and does not exceed the line at the opposite side, carrying out bus serial power supply recovery through the line;
and summarizing all the transfer schemes and the series supply schemes to obtain a voltage-loss series supply scheme of the transformer substation.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. An optimal algorithm-based power distribution network transfer auxiliary decision making system is characterized in that: the system comprises a power supply capacity analysis system and a power-loss power-to-power and serial power supply decision system of a transformer substation;
power supply capability analysis system: the power supply system is configured to analyze the power supply capacity of the power-losing transformer substation and the auxiliary line thereof based on the topological relation of the feeder line ring network to obtain the number information of the ring network and the line contact relation;
the decision system for power loss, transfer and series supply of the transformer substation: and performing iterative solution by using an optimal algorithm, and performing logic judgment on power loss transfer or serial supply of the transformer substation according to the line contact relation, so as to intelligently generate a transfer or serial supply plan after the distribution network key node fails.
2. The optimal algorithm based power distribution network transfer aid decision making system according to claim 1, wherein: the power supply capacity analysis system mainly comprises a data acquisition layer, a data processing layer and a system display layer;
a data acquisition layer: configured to obtain data of each grid operating system;
a data processing layer: performing data integration on the acquired data of the operating system, performing data classification modular processing analysis by using a data mining technology, and determining the power supply capacity of the power distribution network;
a system display layer: is configured for modular exhibition of the power supply capacity of the power distribution network.
3. The optimal algorithm based power distribution network transfer aid decision making system according to claim 2, wherein: the data processing layer comprises a data cleaning module, a loading module and a data processing module;
a data cleansing module configured to: cleaning incomplete, error and repeated data by adopting a data type conversion method, a data comparison method or/and a data association relation method;
the loading module is configured to realize rapid loading of the power grid operation data by utilizing a parallel loading function and a standard data loading function;
and the data processing module is configured to establish a mapping relation for the data, unify and aggregate the data according to the coding rule, the unit of the data and the data type, and perform logic calculation according to the service requirement and the rule support to obtain the line running condition and the net rack contact point condition.
4. The optimal algorithm based power distribution network transfer aid decision making system according to claim 1, wherein: the system comprises a power distribution network topology structure, power distribution network transmission line related parameters, substation primary equipment parameters and power grid operation data.
5. The optimal algorithm based power distribution network transfer aid decision making system according to claim 1, wherein: the method for logically judging the power loss and the power supply of the transformer substation specifically comprises the following steps:
when the transformer substation is in voltage loss, finding all buses under the transformer substation through the topological connection relation;
finding all lines under a 10kv bus, performing power transfer analysis according to the load condition of a reference day and the line contact relation, analyzing a topological path obtained by iterative solution according to an optimal algorithm, if the topological path has the contact relation with a power-off transformer and the power transfer does not exceed the load of the opposite line, storing the scheme, and if the power transfer exceeds the load of the opposite line, the power transfer cannot be performed;
and summarizing all the transferable supply schemes, and storing the transferable supply schemes as the voltage-loss transfer supply schemes of the transformer substation.
6. The optimal algorithm based power distribution network transfer aid decision making system according to claim 1, wherein: the method for logically judging the power loss series supply of the transformer substation specifically comprises the following steps:
when the transformer substation is in voltage loss, finding all buses under the transformer substation through the topological connection relation;
finding all lines under a 10kv bus, performing power transfer analysis according to the load condition of a reference day and the line contact relation, performing analysis according to a topological path obtained by iterative solution of an optimal algorithm, if the topological path has the contact relation with a power-off transformer and the power transfer does not exceed the opposite-side line load, saving the scheme as a power transfer scheme, and if the power transfer exceeds the opposite-side line load, not performing power transfer;
finding all the lines which can not be supplied or are not connected, finding that the lines can be connected through the same bus, and the found lines are connected to the outside, carrying out load analysis, and if the load does not exceed the line at the side and does not exceed the line at the opposite side, carrying out bus serial power supply recovery through the line;
and summarizing all the transfer schemes and the series supply schemes to obtain a voltage-loss series supply scheme of the transformer substation.
7. The power distribution network transfer auxiliary decision making system based on the optimization algorithm as claimed in claim 5 or 6, characterized in that: the method for iterative solution by adopting an optimal algorithm comprises the following steps:
and finding all lines connected with the fault line through the topological path, iterating all lines, finding all connected lines of which the sum of the lines on the two sides does not exceed the current-carrying capacity of the lines on the two sides according to the reference day, and finding the line with the maximum margin of the opposite line in all connected lines as the optimal transfer line.
8. The power distribution network transfer auxiliary decision method based on the optimal algorithm is characterized by comprising the following steps:
analyzing the power supply capacity of the power-losing transformer substation and the auxiliary line thereof based on the topological relation of the feeder line ring network to obtain the number information of the ring network points and the line contact relation;
and performing logic judgment of power loss transfer or serial supply of the transformer substation according to the line contact relation by utilizing iterative solution of an optimal algorithm, and intelligently generating a transfer or serial supply plan after the distribution network key node fails.
9. The power distribution network transfer auxiliary decision method based on the optimization algorithm as claimed in claim 8, characterized in that: the method for iterative solution by adopting an optimal algorithm comprises the following steps:
sequentially selecting line equipment from power supply points forming a power grid, and excluding fault equipment;
and connecting the selected devices with the same endpoint numbers, and carrying out topology on the power grid according to the active power direction until the opposite-side ring network line with contact is obtained, and obtaining and storing a topology channel path except the fault device.
10. The power distribution network transfer auxiliary decision method based on the optimization algorithm as claimed in claim 8, characterized in that: the method for logically judging the power loss and the power supply of the transformer substation specifically comprises the following steps:
when the transformer substation is in voltage loss, finding all buses under the transformer substation through the topological connection relation;
finding all lines under a 10kv bus, performing power transfer analysis according to the load condition of a reference day and the line contact relation, analyzing a topological path obtained by iterative solution according to an optimal algorithm, if the topological path has the contact relation with a power-off transformer and the power transfer does not exceed the load of the opposite line, storing the scheme, and if the power transfer exceeds the load of the opposite line, the power transfer cannot be performed;
summarizing all the transferable supply schemes, and storing the transferable supply schemes as the voltage-loss transfer supply schemes of the transformer substation;
or, the method for logically judging the power loss and the serial power supply of the transformer substation specifically comprises the following steps:
when the transformer substation is in voltage loss, finding all buses under the transformer substation through the topological connection relation;
finding all lines under a 10kv bus, performing power transfer analysis according to the load condition of a reference day and the line contact relation, performing analysis according to a topological path obtained by iterative solution of an optimal algorithm, if the topological path has the contact relation with a power-off transformer and the power transfer does not exceed the opposite-side line load, saving the scheme as a power transfer scheme, and if the power transfer exceeds the opposite-side line load, not performing power transfer;
finding all the lines which can not be supplied or are not connected, finding that the lines can be connected through the same bus, and the found lines are connected to the outside, carrying out load analysis, and if the load does not exceed the line at the side and does not exceed the line at the opposite side, carrying out bus serial power supply recovery through the line;
and summarizing all the transfer schemes and the series supply schemes to obtain a voltage-loss series supply scheme of the transformer substation.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117293823A (en) * | 2023-11-21 | 2023-12-26 | 国网浙江省电力有限公司金华供电公司 | Demand positioning method for electric energy transmission between stations by using AC/DC mutual aid device |
| CN117407572A (en) * | 2023-12-15 | 2024-01-16 | 国网浙江省电力有限公司绍兴供电公司 | Fault information processing method and system for distribution network emergency integrated command |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117293823A (en) * | 2023-11-21 | 2023-12-26 | 国网浙江省电力有限公司金华供电公司 | Demand positioning method for electric energy transmission between stations by using AC/DC mutual aid device |
| CN117293823B (en) * | 2023-11-21 | 2024-01-26 | 国网浙江省电力有限公司金华供电公司 | Demand positioning method for electric energy transmission between stations by using AC/DC mutual aid device |
| CN117407572A (en) * | 2023-12-15 | 2024-01-16 | 国网浙江省电力有限公司绍兴供电公司 | Fault information processing method and system for distribution network emergency integrated command |
| CN117407572B (en) * | 2023-12-15 | 2024-03-15 | 国网浙江省电力有限公司绍兴供电公司 | Fault information processing method and system for distribution network emergency integrated command |
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