CN108808675B - Automatic generation method for power supply conversion scheme of voltage-loss distribution network of transformer substation - Google Patents
Automatic generation method for power supply conversion scheme of voltage-loss distribution network of transformer substation Download PDFInfo
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- CN108808675B CN108808675B CN201810772493.9A CN201810772493A CN108808675B CN 108808675 B CN108808675 B CN 108808675B CN 201810772493 A CN201810772493 A CN 201810772493A CN 108808675 B CN108808675 B CN 108808675B
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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
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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]
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Abstract
The invention provides an automatic generation method of a power supply conversion scheme of a voltage-loss distribution network of a transformer substation, which comprises the following steps: s1: acquiring basic data, namely acquiring related data information by establishing a data interface with each large-phase relation system; s2: data processing and analysis, namely combining S1 data to generate a power supply switching scheme of a power distribution network line, a 10kV bus serial supply scheme of a power distribution network line which cannot be switched, load condition analysis of a main transformer and a main network line of a power distribution network line on the opposite side of the power supply switching, and important user analysis and plan support influenced by voltage loss of a transformer substation; s3: and (6) displaying the data in an all-round way.
Description
Technical Field
The invention relates to the field of power systems, in particular to an automatic generation method of a power distribution network power supply conversion scheme of a transformer substation under a voltage loss condition.
Background
With the rapid development of economy and the improvement of living standard of people, the requirement of people on power supply service is higher and higher. In the pearl triangle area, some severe weather conditions often take place, lead to the electric wire netting to receive the large tracts of land power failure, especially when the major network circuit breaks down, often lead to transformer substation's decompression and can not in time transmit electricity in short time. When a transformer substation loses voltage and cannot transmit power in a short time, in order to realize rapid power restoration of a user, a power distribution network line with the voltage loss generally needs to be converted into power supply so as to realize advanced power restoration of the user.
When a distribution network dispatcher commands emergency repair personnel to perform power supply transfer operation, whether power supply can be transferred or not and a loop closing position needs to be checked through printing a distribution network single line diagram drawing; more importantly, the contents of the current-carrying capacity, the load current and the like of the line needing power supply conversion and the opposite line need to be checked through the EMS or the distribution network master station, so that the heavy overload of the opposite line cannot be caused after the power supply conversion.
When the operation is performed before power supply conversion and checking, a distribution network dispatcher needs to spend a lot of time, time and labor are wasted, and the accuracy is difficult to ensure. Particularly, when a transformer substation is in voltage loss, lines of a feeder line of the transformer substation, which need to be supplied with power, are generally more numerous, and much time is needed, so that the power supply cannot be executed in time, and therefore, after the transformer substation is in voltage loss, a user still needs to wait for a long time to realize power restoration through power supply, power supply reliability and user satisfaction are affected, and more power failure loss is caused.
Based on the analysis, a scheme for quickly generating a power distribution network power supply switching scheme under the condition of voltage loss of a transformer substation is urgently needed to assist a distribution network dispatcher to command emergency repair personnel to realize quick power supply switching operation, and the scheme is a demand which needs to be solved urgently at present.
Disclosure of Invention
The invention provides an automatic generation method of a power supply transfer scheme of a voltage-loss distribution network of a transformer substation, which provides support for a distribution network dispatcher to command emergency repair personnel to realize rapid power transfer and guarantee safe and stable operation of a power grid.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
an automatic generation method for a power supply conversion scheme of a voltage-loss distribution network of a transformer substation comprises the following steps:
s1: and acquiring basic data. And (3) establishing a data interface with each large-phase relation system to acquire related data information:
(1) the method comprises the steps that a data interface is established with a power grid production system to obtain distribution network line account data, information of a regional office where a distribution network line belongs, information of a power supply station and information of a main transformer and a main network line where the distribution network line belongs, and the like;
(2) the method comprises the steps of establishing a data interface with a distribution GIS (Geographic Information System, GIS) to obtain the looped network account Information of the distribution network line. The looped network account information comprises relevant information of a local side distribution network line, an opposite side line, a transformer substation, a power supply station and a regional office and the like, and also comprises information of looped network point positions and the like;
(3) the method comprises the steps that a data interface is established with a marketing system, the number of users of a distribution network line is obtained, and the like, wherein the number of users comprises information such as the number of all users and the number of users in an urban area;
(4) the method comprises the steps of establishing a Data interface with an SCADA (Supervisory Control And Data Acquisition) system, obtaining allowable current-carrying capacity And line current of a distribution network line, And further comprising allowable current-carrying capacity And load related Data of equipment such as a main network line And a main transformer.
S2: and (6) data processing and analysis. And generating a power supply switching scheme of a power distribution network line, a 10kV bus serial supply scheme of a power distribution network line which cannot be switched by combining S1 data, analyzing the load conditions of a main transformer and a main network line of the power distribution network line on the opposite side of the power supply switching, and analyzing important user analysis and plan support of voltage loss influence of a transformer substation.
(1) The scheme that the distribution network can convert the power supply line into the power supply is generated, and the selection logic of the looped network to the opposite side line is as follows:
1) the transformer substation to which the distribution network line on the opposite side belongs cannot be a voltage-loss transformer substation;
2) the power supply conversion and distribution side network line can be selected only once in the same total station voltage loss power supply conversion scheme;
3) (the number of the distribution network line users of the voltage loss station plus the number of the distribution network line users on the opposite side) < 6000;
4) (the length of the distribution network line of the voltage loss station + the length of the distribution network line on the opposite side) is 70% < 15;
5) (the current-monthly maximum current of the distribution network line of the voltage loss station + the current-monthly maximum current of the opposite distribution network line) < (the current-carrying capacity of the opposite distribution network line is compared with the minimum current-carrying capacity of the ring network loop).
(2) The non-switching power supply line recovers power supply through a 10kV bus serial supply, and the serial supply line selection logic is as follows:
1) selecting 1 series supply line for each section of 10kV bus (if 1 transformer substation has two 10kV buses, 1M bus and 2M bus respectively select 1 series supply line);
2) the line is selected from the distribution network rotatable power supply lines;
3) carrying capacity of the opposite side distribution network line, the current-month maximum current of the distribution network line of the voltage loss station, and the current-month maximum current of the opposite side distribution network line is greater than 0;
4) (the length of the distribution network line of the voltage loss station + the length of the distribution network line on the opposite side) × 70% < 12.
(3) And (5) analyzing the load conditions of the main transformer and the main network line of the distribution network line on the opposite side of the power supply. The load conditions of main network equipment such as a main transformer and a main network line to which a power transfer and supply opposite side line belongs are analyzed, and the load conditions mainly comprise data such as a rated value of the equipment, the highest load and the highest load rate in the previous day, the highest load and the load rate in the current month and the like. Meanwhile, equipment with the load rate exceeding 80% is highlighted through red shading emphasis.
(4) The transformer substation voltage loss influences important user analysis and plan support. Important user information and related plans influenced by power supply are automatically given through the standing book topology analysis, and the important user information comprises important user names, important user grades, whether self-contained emergency power supplies exist or not, the local area and the power supply station and the like. And downloading the accident handling emergency plan according to the data content to realize the quick power restoration of the user.
And S3, displaying the data in an all-round way. And in the data display process, performing data display in different modules. The following modules are mainly provided:
(1) the distribution network can transfer power to the line and transfer the power to the scheme module: displaying relevant information such as power supply stations, transformer substations, 10kV buses, line types, line carrying capacity, user numbers, highest load conditions of the previous day and the current month, positions of ring network points and the like of distribution network lines on the current side and the opposite side of the power supply;
(2) the 10kV bus serial supply scheme module of the power distribution network line can not be supplied: when the transformer substation is in voltage loss, related information such as a serial power supply wire on the side of a 10kV bus supplied by the transformer substation, a power supply station to which a line on the opposite side belongs, a transformer substation, the 10kV bus, the type of the line, the current-carrying capacity of the line, the number of users, the highest load condition of the previous day and the current month, the position of a ring network point and the like is displayed;
(3) the main transformer and main network line load condition analysis module of the power transfer and supply opposite side distribution network line: displaying relevant information such as a main transformer of a line on the opposite side of the power supply, a rated value of a main line, the highest load value and load rate of the load in the previous day, the highest load value and load rate in the current month and the like;
(4) the transformer substation voltage loss influence important user analysis and plan support module comprises: and displaying relevant information such as important user names, important user grades, self-contained emergency power supplies, local power supply stations of affiliated areas, user contact telephones, accident handling plans and the like of the transformer substation under the influence of voltage loss.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
1. after the transformer substation is subjected to voltage loss, the rapid power restoration of a user is realized through a distribution network power supply conversion scheme automatically and rapidly generated by the system, so that the power supply reliability is improved;
2. for users who have long-time power failure and can bring equipment loss and power failure loss, such as sensitive enterprises and fishpond culture users, the automatic and fast generation scheme for switching the distribution network to the power supply can realize fast power restoration of the users, reduce the loss of the users and improve the satisfaction degree of the users.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
The invention discloses an automatic generation method of a power supply conversion scheme of a transformer substation voltage-loss distribution network, which has the following principle: and information such as distribution network ring network account data, the number of distribution network line users, main and distribution network equipment load data and the like is acquired by establishing a data interface with each large system. And analyzing the contact relation between the power distribution network line of the substation and the power supply line of other substations according to the distribution network ring network account data, generating a power supply line-to-line conversion scheme by using ring network opposite-side line selection logic, and generating a power supply line-to-line conversion scheme by using series supply line selection logic. Automatically analyzing the load conditions of a main transformer and a main network line to which the power transfer and supply opposite side distribution network line belongs according to the load conditions of the main network line and the main transformer; and automatically analyzing the affected important users according to the power supply relation of the voltage-loss transformer substation. According to the analysis, the overall transformer substation voltage-loss distribution network power supply conversion scheme is automatically and quickly generated, scheme support is provided for a distribution network dispatcher to execute distribution network power supply conversion under the condition of transformer substation voltage loss, and quick execution of power supply conversion is achieved.
As shown in fig. 1, the specific implementation process of the method for automatically generating the power supply transformation scheme for the voltage-loss distribution network of the transformer substation is as follows:
and S1 selecting a voltage-loss substation: and selecting the voltage-loss substation needing analysis.
S2, acquiring basic data of the power grid ledger: and acquiring the account data of the distribution network line, such as information of a regional office to which the distribution network line belongs, a power supply station, a main transformer to which the distribution network line belongs, a main network line and the like.
S3, acquiring network distribution ring network account data: and acquiring the looped network account information of the distribution network line, wherein the looped network account information contains relevant information such as a local side distribution network line, an opposite side line and a transformer substation, a power supply station and a regional office thereof, and also contains information such as looped network point positions.
S4, acquiring load data of the power grid equipment: and acquiring load data of the power grid equipment, such as allowable current-carrying capacity and line current of a distribution network line, and also including allowable current-carrying capacity and load related data of equipment such as a main network line and a main transformer.
S5 distribution network line user number obtaining: and acquiring the conditions such as the number of the distribution network line users, such as the number of all users and the number of urban users.
S6 is generated by a power supply switching scheme of a switching distribution network line: and analyzing the contact relation between the power distribution network line of the transformer substation and the power supply line of other transformer substations according to the distribution network ring network account data, and generating a scheme for converting the power supply line into the power supply line by using the ring network to the side line selection logic.
S7 cannot be converted into a 10kV bus serial supply scheme of the distribution network line for generation: and analyzing the contact relation between the power supply distribution network line of the transformer substation and the power supply line of other transformer substations according to the distribution network ring network account data, and generating a power supply line serial supply failure scheme by serial supply line selection logic.
S8 transferred power supply side distribution network line main transformer and main network line load condition analysis: the load conditions of main network equipment such as a main transformer and a main network line to which a power transfer and supply opposite side line belongs are analyzed, and the load conditions mainly comprise data such as a rated value of the equipment, the highest load and the highest load rate in the previous day, the highest load and the load rate in the current month and the like.
S9, important user analysis and plan support are influenced by the voltage loss of the transformer substation: important user information and related plans influenced by power supply are automatically given through the standing book topology analysis, and the important user information comprises important user names, important user grades, whether self-contained emergency power supplies exist or not, the local area and the power supply station and the like.
And (8) automatically generating a power supply conversion scheme of the voltage-losing distribution network of the S10 transformer substation: and synthesizing the contents of S6, S7, S8 and S9 to comprehensively generate the overall scheme of the substation voltage-loss distribution network switching point.
The same or similar reference numerals correspond to the same or similar parts;
the positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (2)
1. An automatic generation method for a power supply conversion scheme of a voltage-loss distribution network of a transformer substation is characterized by comprising the following steps:
s1: acquiring basic data, namely acquiring related data information by establishing a data interface with each large-phase relation system;
s2: data processing and analysis, namely combining S1 data to generate a power supply switching scheme of a power distribution network line, a 10kV bus serial supply scheme of a power distribution network line which cannot be switched, load condition analysis of a main transformer and a main network line of a power distribution network line on the opposite side of the power supply switching, and important user analysis and plan support influenced by voltage loss of a transformer substation;
s3: data are displayed in an omnibearing manner;
the specific process of step S1 is:
1) the method comprises the steps that a data interface is established with a power grid production system to obtain distribution network line account data, and information of a regional office where a distribution network line belongs, a power supply station and a main transformer and a main network line where the distribution network line belongs;
2) acquiring looped network account information of a distribution network line by establishing a data interface with a power distribution GIS; the looped network account information comprises relevant information of a local side distribution network line, an opposite side line, a transformer substation to which the opposite side line belongs, a power supply station and a regional office, and also comprises looped network point position information;
3) acquiring the number of users of the distribution network line by establishing a data interface with a marketing system, wherein the number of users comprises the information of all the users and the number of users in an urban area;
4) the method comprises the steps that a data interface is established with an SCADA system, the allowable current-carrying capacity and the line current of a distribution network line are obtained, and the allowable current-carrying capacity and the load related data of a main line and main transformer equipment are also included;
in the step S2, in the above step,
(1) the scheme that the distribution network can convert the power supply line into the power supply is generated, and the selection logic of the looped network to the opposite side line is as follows:
1) the transformer substation to which the distribution network line on the opposite side belongs cannot be a voltage-loss transformer substation;
2) the power supply conversion and distribution side network line can be selected only once in the same total station voltage loss power supply conversion scheme;
3) (the number of the distribution network line users of the voltage loss station + the number of the distribution network line users on the opposite side is less than 6000;
4) the line length of a distribution network of a voltage loss station plus the line length of an opposite side distribution network is 70% < 15;
5) the current carrying capacity of the distribution network line at the voltage loss station is compared with the minimum current carrying capacity of the looped network loop;
(2) the non-switching power supply line recovers power supply through a 10kV bus serial supply, and the serial supply line selection logic is as follows:
1) selecting 1 series supply line for each section of 10kV bus;
2) the line is selected from the distribution network rotatable power supply lines;
3) carrying capacity of the opposite side distribution network line, the current-month maximum current of the distribution network line of the voltage loss station, and the current-month maximum current of the opposite side distribution network line is greater than 0;
4) the line length of a distribution network of a voltage loss station plus the line length of an opposite side distribution network is 70% < 12;
(3) analyzing the load conditions of a main transformer and a main network line to which the distribution network line on the power transfer and supply opposite side belongs, analyzing the load conditions of the main transformer and main network equipment of the main network line to which the distribution network line on the power transfer and supply opposite side belongs, mainly comprising the rated value of the equipment, the highest load and the highest load rate of the previous day, and the data of the highest load and the load rate of the current month, and meanwhile, highlighting the equipment with the load rate exceeding 80 percent through red shading;
(4) the transformer substation voltage loss influences important user analysis and plan support, important user information and related plans influenced by power supply are automatically given through ledger topological analysis, the important user information comprises important user names, important user grades, whether self-contained emergency power supplies exist or not, the local authorities and power supply station contents belong to, and the emergency plans are downloaded according to the data contents to realize rapid power restoration of users.
2. The method for automatically generating the power distribution and transformation scheme for the voltage-losing distribution network of the transformer substation according to claim 1, wherein in the step S3, in the process of data display, sub-module data display is performed:
(1) the distribution network can transfer power to the line and transfer the power to the scheme module: displaying relevant information of power supply stations, transformer substations, 10kV buses, line types, line carrying capacity, user numbers, highest load conditions of the previous day and the current month and positions of ring network points of distribution network lines on the current side and the opposite side of the power supply;
(2) the 10kV bus serial supply scheme module of the power distribution network line can not be supplied: when the transformer substation is in voltage loss, series power supply wires on the side of a 10kV bus supplied by the transformer substation, a power supply station to which a line on the opposite side belongs, the transformer substation, the 10kV bus, the type of the line, the current-carrying capacity of the line, the number of users, the highest load condition of the previous day and the current month and related information of the position of a ring network point are displayed;
(3) the main transformer and main network line load condition analysis module of the power transfer and supply opposite side distribution network line: displaying the main transformer of the line on the opposite side of the power supply, the rated value of the main line, the highest load value and load rate of the previous day, and the highest load value and load rate related information of the current month;
(4) the transformer substation voltage loss influence important user analysis and plan support module comprises: and displaying related information of the important user name, the important user grade, the self-contained emergency power supply, the local power supply station of the area, the user contact telephone and the accident handling plan of the transformer substation, which are affected by the voltage loss.
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