CN108933437B - Automatic analysis method for power supply capacity of power distribution network - Google Patents
Automatic analysis method for power supply capacity of power distribution network 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
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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 a power supply capacity automatic analysis method of a power distribution network, which comprises the following steps: acquiring basic data: establishing a data interface with each large-phase relation system to acquire related data information; and (3) data processing and analysis: establishing a contact relation between a distribution network line supplied by an intra-area transformer substation or a 10kV bus and a distribution network line supplied by an extra-area transformer substation or a 10kV bus through distribution network line ring network information processing and analysis; meanwhile, the load data information of the transformer substation, the 10kV bus and the distribution network line is combined to analyze whether the distribution network line is overloaded after being converted into power supply or not by means of the looped network contact relation; the number of the users of the 10kV distribution network line is combined with the contact relation of the ring network, and the number of the users of the power transfer network is analyzed; and (3) data omnibearing display: after the site and the setting in the relevant area are input on the interface, the system automatically analyzes and processes the data and presents the result to the user.
Description
Technical Field
The invention relates to the field of power distribution network management methods, in particular to an automatic analysis method for power supply capacity of a power distribution network.
Background
Due to the grid structure of the main network power grid, load limitation of multiple substations or 10kV buses in a certain area often occurs, and for the power supply reliability of users, partial load needs to be transferred to other substations outside the area and the 10kV buses for power supply through a distribution network line. When a distribution network dispatcher performs power supply transfer, the contact relation between a distribution network line and a distribution network line supplied by an extra-region transformer substation or a 10kV bus needs to be checked manually one by one, and the problem that whether the overload of an opposite side transformer substation or a main transformer is caused after power supply transfer or not needs to be considered. In the traditional mode, when the emergency power limiting is needed for the power grid, a power conversion and supply scheme of a distribution network line in an area is difficult to rapidly provide, so that the load control is not timely, and potential safety hazards are brought to the operation of power grid equipment.
Based on the analysis, a scheme for rapidly generating power conversion and supply of a distribution network line supplied by a transformer substation or a 10kV bus in an area under the condition of giving load control of a plurality of transformer substations or 10kV buses in the area is urgently needed, and is a demand which needs to be solved at present.
Disclosure of Invention
The invention provides an automatic analysis method for power supply capacity of a power distribution network, which provides support for safe and reliable operation of a power grid.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
an automatic analysis method for power supply capacity of a regional power distribution network comprises the following steps:
s1: acquiring basic data: and establishing a data interface with each large-phase relation system to acquire related data information. If a data interface is established with a power grid production management information system, power grid ledger basic data, such as information of station, transformer, line relation and the like of a distribution network line, is acquired; establishing a data interface with a power grid Geographic Information System (GIS) to acquire the contact relation of the distribution network line, namely the ring network point Information of the distribution network line; the method comprises the steps that a data interface is established with a distribution network automation system, and load data of a distribution network line, such as transformer substation load and distribution network line load information, is obtained; and acquiring the number information of the distribution network line users by establishing a data interface with the marketing management system.
S2: and (4) data processing and analysis, namely establishing a contact relation between the distribution network line supplied by the transformer substation in the region or the 10kV bus and the distribution network line supplied by the transformer substation outside the region or the 10kV bus through the distribution network line ring network information processing and analysis. Meanwhile, the load data information of the transformer substation, the 10kV bus and the distribution network line is combined to analyze whether the distribution network line is overloaded after being converted into power supply or not by means of looped network contact relation analysis. In addition, the number of users of the 10kV distribution network line is combined with the contact relation of a ring network, and the number of users of the power transfer network is analyzed.
And analyzing the accident event grade caused by power failure in the area according to the accident event grade standard by combining the distribution network line load and the user number in the area. Meanwhile, according to information such as whether the distribution network line in the area is an important user line, important users subjected to marketing caused by power failure in the area are analyzed. In addition, the transformer substation and the 10kV bus which the distribution network line outside the area belongs to are supplied with power by combining the distribution network line inside the area, and whether the transformer substation or the main transformer outside the area is overloaded after the distribution network line inside the area is converted into power is analyzed.
During data processing analysis, the relevant fields are defined as follows:
(1) number of lines of distribution network in area: a distribution network line powered by a transformer substation or a 10V bus in a region;
(2) number of lines of the accessible distribution network in the area: the number of regional distribution network lines which are in looped network connection with the regional distribution network lines;
(3) number of lines which cannot be connected in the area: the number of regional distribution network lines which are in non-ring network connection with the regional distribution network lines;
(4) the number of the distribution network lines can be completely converted in the area: the number of the regional distribution network lines which are in ring network connection with the regional distribution network lines and can not cause overload of the regional distribution network lines after power conversion;
(5) the number of the lines of the distribution network which can not be completely converted in the region is as follows: the number of the regional distribution network lines which are in ring network connection with the regional distribution network lines but can cause overload of the regional distribution network lines after the whole line is converted into electricity;
(6) the number of users in the region: the total number of users supplied with power by distribution network lines supplied with power by substations or 10V buses in an area;
(7) number of contactable users in an area: the total number of users of the regional distribution network line which is in looped network connection with the regional distribution network line;
(8) number of users in the area that cannot be contacted: the total number of users of the regional distribution network line which is in non-ring network connection with the regional distribution network line;
(9) the number of users in the region can be completely converted: the total number of users of the number of the regional distribution network lines which are in ring network connection with the regional distribution network lines and can not cause overload of the regional distribution network lines after power conversion;
(10) the number of users which can not be completely converted in the area is as follows: the total number of users of the regional distribution network line which is in ring network connection with the regional distribution network line but can cause overload of the regional distribution network line after the whole line is converted into electricity;
(12) load in the area: the total load of a distribution network line supplied by a transformer substation or a 10V bus in a region;
(12) the contact load in the area: the total load of the regional distribution network line which is in looped network connection with the regional distribution network line;
(13) non-contact load in area: the total load of the regional distribution network line which is in non-ring network connection with the regional distribution network line;
(14) the load can be fully rotated in the region: the total load of the number of the regional distribution network lines which are in ring network connection with the regional distribution network lines and can not cause overload of the regional distribution network lines after power conversion;
(15) the load can not be fully rotated in the area: the total load of the regional distribution network line is in ring network connection with the regional distribution network line, but the overload of the regional distribution network line can be caused after the whole line is converted into electricity.
S3: and (3) data omnibearing display: after the site and the setting in the relevant area are input on the interface, the system automatically analyzes and processes the data and presents the result to the user.
And providing a transformer substation and a 10kV bus in an interface input area item through power grid account data, and providing input of a non-transferable item and a transferable item for coping with special occasions. In a certain regional distribution network power transfer capability analysis scheme, the regional attribute maintenance of the 'non-transferable item' and the 'transferable item' can only select one at most, namely: either the "transferable only item" or the "non-transferable item" may not be selected, and both items cannot be selected simultaneously. Which are respectively defined as follows:
(1) area item: a part of a certain area needing to transfer load;
(2) only the terms are transferable: the load of the area item can only be transferred to the partial area;
(3) an untransferable item: the load of the above-mentioned area item cannot be transferred to the area of the portion.
And in the data display process, performing data display in different modules. The following modules are mainly provided:
(1) regional website input module: inputting the items in the region, the items which cannot be transferred into the region and the items which can only be transferred into the region or 10kV buses;
(2) a power supply capacity analysis module: the method comprises the following steps of displaying the number of distribution network lines, the number of users, loads and the like supplied by each transformer substation and a 10kV bus in a region in detail;
(3) distribution network changes power supply plan module: listing a power supply switching scheme of each distribution network line which can switch power supply to the outside of the area;
(4) master network device load case: and listing the load condition of the transformer substation or the 10kV bus supplied with power by the distribution network line outside the region.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
(1) the automatic analysis of the power supply capacity of the regional power distribution network provides automatic and rapid generation of a distribution network line power supply switching plan when a distribution network dispatcher needs to perform emergency load control, ensures timely control of load, ensures safe and stable operation of a power grid, and improves power supply reliability;
(2) the power supply capacity of the regional power distribution network is automatically analyzed, and a distribution network dispatcher quickly transfers power to a power supply user through a power transfer and supply plan which is automatically and quickly generated, so that the phenomenon of permanent power failure of the user caused by equipment overload is avoided, and the satisfaction degree of the user is improved;
(3) by means of automatic analysis of the power supply capacity of the regional power distribution network, weak links of the power grid structure can be automatically revealed, and operation data support is provided for planning and building of the power grid.
Drawings
Fig. 1 is a flowchart of an automatic analysis method for power supply capacity of a regional distribution network according to 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 analysis method for power supply capacity of a regional power distribution network, which has the following principle: and data such as a power distribution network line account, distribution network ring network contact data, power grid equipment load, the number of distribution network line users and the like are acquired by establishing a data interface with each large system. The method comprises the steps of analyzing the contact relation between a distribution network line and an outside-area distribution network line, wherein the distribution network line is supplied with power by a transformer substation or a 10kV bus in an area according to the ring network data information of the distribution network line, analyzing whether overload can be caused after power is supplied or not according to the conditions such as load and the like, and automatically analyzing the conditions such as the power accident level and the like caused by voltage loss in the area according to the conditions of the power supply load and the number of users of the. In addition, a system interface is established to automatically input a transformer substation or a 10kV bus station and other required stations in an area, the power supply capacity of a power distribution network in the area is automatically analyzed from the aspects of the number of distribution network lines, the number of distribution network line users, the load of the distribution network lines and the like, and finally a plan for transferring the distribution network lines to the power supply in the area is generated, so that support is provided for the power transfer execution of the distribution network scheduling execution area power distribution network, and the fast execution of power transfer is realized.
Referring to fig. 1, the specific implementation process of the automatic analysis method for the power supply capacity of the regional distribution network is as follows:
and (4) inputting 1 to a substation or 10kV bus station in the S1 area: the method comprises the steps of carrying out regional items of a transformer substation or a 10kV bus which needs to be switched to supply power in a region, and simultaneously further comprising non-transferable items and transferable items of the transformer substation or the 10kV bus in special application scenes.
Acquiring basic data of the power grid account 2: and establishing a data interface with a power grid production management information system to acquire power grid ledger basic data, such as information of station, transformer, line relation and the like of the distribution network line.
Network distribution ring network account data acquisition 3: the data interface is established with a Geographic Information System (GIS) of the power grid, and the contact relation of the distribution network line, namely the ring network point Information of the distribution network line, is obtained.
Acquiring load data of the power grid equipment 4: load data of a distribution network line, such as transformer substation load and distribution network line load information, is acquired by establishing a data interface with a distribution network automation system.
The number of the users of the distribution network lines is obtained 5: and acquiring the number information of the distribution network line users by establishing a data interface with the marketing management system.
Analyzing the power supply capacity of the return number of the distribution network lines 6: according to the ring network contact information of the distribution network line supplied by the transformer substation or the 10kV bus in the area and the distribution network line outside the area, the number of the distribution network lines in the area, the number of the distribution network lines which can be contacted in the area, the number of the distribution network lines which can not be contacted in the area, the number of the distribution network lines which can be fully converted in the area and the number of the distribution network lines which can not be fully converted in the area are analyzed.
Distribution network line user number power supply capability analysis 7: according to the ring network contact information of the distribution network line supplied by the transformer substation or the 10kV bus in the area and the distribution network line outside the area, the number of users in the area, the number of users capable of being contacted in the area, the number of users incapable of being contacted in the area, the number of users capable of being completely converted in the area and the number of users incapable of being completely converted in the area are analyzed.
Distribution network line load power supply capacity analysis 8: according to the ring network contact information of the distribution network line supplied with power by the transformer substation or the 10kV bus in the area and the distribution network line outside the area, the load in the area, the contact load in the area, the non-contact load in the area, the full-rotation load in the area and the non-full-rotation load in the area are analyzed.
Primary network device load condition analysis 9: and analyzing the substation and the main network line to which the distribution network line outside the area is connected with the distribution network line outside the area. Meanwhile, whether the transformer substation and the main network line are overloaded after power transmission and supply is analyzed by acquiring load related data of the transformer substation and the main network line outside the area, and support is provided for power transmission and supply analysis.
Important user influence situation analysis 10: and analyzing important users supplied with power by the distribution network line account information supplied by the regional distribution substation or the 10kV bus.
Generating a power supply switching plan of the distribution network line in the area 11: according to the contact relation information of the distribution network line and the distribution network line outside the area, which are supplied with power by the transformer substation or the 10kV bus in the area, and the information such as the load and the number of users of the distribution network line, a distribution network line power supply switching plan is automatically generated, the distribution network scheduling is used for executing the load control of the distribution network line in the area and executing power supply switching to provide support, and the effective and rapid implementation control of the load is realized.
Summary of analysis of power supply capability of area distribution network 12: according to the analysis data of the power supply capacity of the distribution network in the region, an analysis summary of the power supply capacity of the distribution network in the region is automatically generated, and the main contents comprise: the method comprises the following steps of analyzing the power supply capacity of dimensions such as the number of the return lines of the distribution network, the number of users of the distribution network lines, the load of the distribution network lines and the like, and analyzing the level of power accident events caused by regional voltage loss, important users influenced by the regional voltage loss and the like.
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.
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 (5)
1. A power supply capacity automatic analysis method of a power distribution network is characterized by comprising the following steps:
s1: acquiring basic data: and (3) establishing a data interface with each large-phase relation system to acquire related data information: the method comprises the steps that a data interface is established with a power grid production management information system, and power grid ledger basic data including station, transformer and line relation information of distribution network lines are obtained; the method comprises the steps that a data interface is established with a power grid Geographic Information System (GIS), and the contact relation of distribution network lines, namely ring network point information of the distribution network lines, is obtained; the method comprises the steps that a data interface is established with a distribution network automation system, and load data of a distribution network line, including transformer substation loads and distribution network line load information, are obtained; acquiring the number information of the distribution network line users by establishing a data interface with a marketing management system;
s2: and (3) data processing and analysis: establishing a contact relation between a distribution network line supplied by an intra-area transformer substation or a 10kV bus and a distribution network line supplied by an extra-area transformer substation or a 10kV bus through distribution network line ring network information processing and analysis; meanwhile, the load data information of the transformer substation, the 10kV bus and the distribution network line is combined to analyze whether the distribution network line is overloaded after being converted into power supply or not by means of the looped network contact relation; the number of the users of the 10kV distribution network line is combined with the contact relation of the ring network, and the number of the users of the power transfer network is analyzed;
s3: and (3) data omnibearing display: after the sites and settings in the relevant area are input on the interface, the system automatically analyzes and processes the data and presents the results to the user;
the step S2 further includes: analyzing the grade of an accident event caused by power failure in the area according to the grade standard of the accident event by combining the conditions of distribution network line load and the number of users in the area; meanwhile, analyzing important users who are affected by power failure in the area according to information such as whether the distribution network lines in the area are important user lines; and (4) analyzing whether the transformer substation outside the area or the main transformer is overloaded after the distribution network line in the area is converted into the power or not by combining the transformer substation to which the distribution network line outside the area is converted into the power and the 10kV bus.
2. The method for automatically analyzing the power supply capacity of the power distribution network according to claim 1, wherein the number of the distribution network lines in the area is the number of the distribution network lines supplied by a transformer substation or a 10V bus in the area; the number of the distribution network lines which can be communicated in the area is the number of the area distribution network lines which are in looped network communication with the distribution network lines outside the area; the number of the non-contactable lines in the area is the number of the area network distribution lines which are in non-looped network contact with the distribution network lines outside the area; the number of the network lines of the distribution network which can be completely switched in the area is the number of the network lines of the distribution network which has ring network communication with the network lines of the distribution network outside the area and can not cause the overload of the network lines of the distribution network outside the area after the power is switched; the number of the lines of the distribution network which can not be completely converted in the area is the number of the lines of the distribution network which has ring network connection with the lines of the distribution network outside the area and can cause the overload of the lines of the distribution network outside the area after the lines are converted into electricity; the number of users in the region is the total number of users supplied by a distribution network line supplied by a transformer substation or a 10V bus in the region; the number of the users capable of being communicated in the region is the total number of the users of the regional distribution network line which is in ring network communication with the regional distribution network line; the number of the users which cannot be connected in the region is the total number of the users of the regional distribution network line which is in non-ring network connection with the regional distribution network line; the total number of the users which can be converted in the area is the total number of the users which are in ring network connection with the line of the distribution network outside the area and can not cause the overload of the line of the distribution network outside the area after the power conversion; the number of the users which can not be completely converted in the area is the total number of the users of the area distribution network line which has ring network connection with the distribution network line outside the area but can cause the overload of the distribution network line outside the area after the power is converted from the whole line; the load in the region is the total load of a distribution network line supplied by a transformer substation or a 10V bus in the region; the load which can be communicated in the area is the total load of the area distribution network line which is in looped network communication with the distribution network line outside the area; the load which cannot be communicated in the region is the total load of the regional distribution network line which is in non-ring network communication with the distribution network line outside the region; the fully-transferable load in the area is the total load of the number of the area network distribution lines which are in ring network connection with the area network distribution lines and can not cause the overload of the area network distribution lines after being transferred to the electricity; the load which can not be completely converted in the area is the total load of the area distribution network line which has ring network connection with the area distribution network line but can cause the overload of the area distribution network line after the whole line is converted into electricity.
3. The method for automatically analyzing the power supply capacity of the power distribution network according to claim 2, wherein in the step S3, the transformer substation and the 10kV bus in the interface input area item are provided through the grid ledger data, and meanwhile, in order to deal with special occasions, the input of the non-transferable item and the transferable item is provided; in a certain regional distribution network power transfer capability analysis scheme, the regional attribute maintenance of the 'non-transferable item' and the 'transferable item' can only select one at most, namely: either the "transferable only item" or the "non-transferable item" may not be selected, and both items cannot be selected simultaneously.
4. The method according to claim 3, wherein the area item is a part of a certain area requiring load transfer; the only transferable item is that the load of the area item can only be transferred to the area of the part; the non-transferable item is the area to which the load of the area item can not be transferred.
5. The method for automatically analyzing the power supply capacity of the power distribution network according to claim 4, wherein in the process of data display, the data display in different modules is performed, and the method comprises the following modules:
regional website input module: inputting the items in the region, the items which cannot be transferred into the region and the items which can only be transferred into the region or 10kV buses;
a power supply capacity analysis module: showing the number of distribution network lines, the number of users and the load condition of each transformer substation and 10kV bus power supply in a region in detail; distribution network changes power supply plan module: listing a power supply switching scheme of each distribution network line which can switch power supply to the outside of the area; master network device load case: and listing the load condition of the transformer substation or the 10kV bus supplied with power by the distribution network line outside the region.
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