CN113054665B

CN113054665B - Method and system for analyzing section power supply range and stability control measures

Info

Publication number: CN113054665B
Application number: CN202110596729.XA
Authority: CN
Inventors: 李伟; 吴海江; 唐鹤; 周俊宇; 花洁; 亓玉国; 区允杰; 梁锦来; 胡福金; 陈凯阳; 骆国铭; 陈晓彤
Original assignee: Foshan Power Supply Bureau of Guangdong Power Grid Corp
Current assignee: Foshan Power Supply Bureau of Guangdong Power Grid Corp
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-08-10
Anticipated expiration: 2041-05-31
Also published as: CN113054665A

Abstract

The application discloses a method and a system for analyzing a section power supply range and stability control measures, wherein the method comprises the following steps: firstly, a section to be analyzed in a local system is compared with section information of an SCADA system, then section equipment is topologically acquired to form section equipment, the section equipment is grouped, whether a topological path corresponding to an upper boundary equipment group after grouping comprises a bus of the same 220kV section or not is judged, whether the section is an invalid section or not is determined, further, section validity verification is added before section power supply range and stability control measure analysis, the invalid section is eliminated, the invalid section does not need to be analyzed in the subsequent section power supply range and stability control measure analysis, and further, the efficiency of section power supply range and stability control measure analysis is improved.

Description

Method and system for analyzing section power supply range and stability control measures

Technical Field

The application relates to the technical field of electric power, in particular to a method and a system for analyzing a section power supply range and stability control measures.

Background

The transmission section is also called a power flow section. In an actual power system, a system dispatcher often selects a plurality of lines connecting a power supply center and a load center as a power transmission section according to geographical positions.

In the existing technical scheme, the monitoring of the section of the power grid and the intelligent generation of a transfer strategy are realized through a power grid positive sequence topology and a power grid negative sequence topology. According to the technical scheme, in the analysis of the power supply range and the stability control measures of the cross section, firstly, it is assumed that all cross section forming equipment are inflow equipment, then whether the equipment forming the cross section are related or not is sequentially searched according to the current direction, if the equipment forming the cross section are related, the equipment forming the cross section is the cross section outflow equipment, and therefore the cross section forming equipment is obtained through analysis.

However, in the analysis process, the effectiveness of the cross section is not judged by relevant logic, so that the subsequent analysis process can continuously analyze invalid cross sections, and the subsequent analysis efficiency of the composition range and the stability control measure of the cross sections is influenced; furthermore, when judging whether the 110kV main transformer equipment in the section has the roll-out condition, the technical scheme is to search superior power supply equipment against the current direction according to the power grid topological structure, when the 110kV main transformer equipment in the section is found to have other power supply electricity traceable only through one disconnecting switch, and when the switches forming the section do not exist in the traced path, the section is judged to be the roll-out equipment.

Disclosure of Invention

The application provides a method and a system for analyzing a section power supply range and stability control measures, which are used for improving the analysis efficiency of the section power supply range and stability control measure analysis.

In view of the above, a first aspect of the present application provides a method for analyzing a section power supply range and stability control measures, where the method includes:

s1, judging whether the section information of the local system section is the same as the section information of the SCADA system, if so, informing an administrator to modify the section information, otherwise, executing the step S2;

s2, judging whether the section information is manually modified, if so, finishing the analysis of the section, otherwise, executing the step S3;

s3, carrying out topology on the equipment of the section to obtain the component equipment of the section, judging whether the number of the component equipment is equal to 1, if so, executing a step S6, otherwise, executing a step S4;

s4, judging whether the component equipment is in the topology result corresponding to the rest component equipment of the component equipment, if so, putting the component equipment into a lower boundary equipment group, otherwise, putting the component equipment into an upper boundary equipment group;

s5, judging whether the topological path corresponding to the upper boundary equipment group contains a bus of 220kV at the same section, if so, executing a step S6, otherwise, marking the section as an invalid section;

s6, initializing the load coefficient of the equipment forming the section, analyzing the power supply range of the section, and analyzing the stability control measure of the section.

Optionally, the analyzing the power supply range of the cross section specifically includes:

setting the component equipment with the load coefficient not less than zero as a topology starting point, setting the component equipment with the load coefficient less than zero as a topology end point, and respectively acquiring each 220kV main transformer and 110kV main transformer according to a first topology path, a second topology path and a third topology path;

and judging whether the section has a stable control execution station, if so, acquiring a cut-off line corresponding to the stable control execution station and transformer information corresponding to the cut-off line, and marking the cut-off line and the transformer information as a cuttable load, otherwise, finishing analysis of the stable control execution station.

Optionally, the analyzing the stability control measure on the fracture surface specifically includes:

analyzing a network operation network frame of the power grid, and storing various operation structure data to the local system;

setting a switching mode of the 110kV main transformer according to various operation structure data of the local system by taking the 110kV main transformer with any section as analysis equipment;

and judging whether various devices in the switching mode are in the section power supply range, if so, acquiring a switch needing to be disconnected and a switch needing to be closed according to the switching mode, and determining the affected section, a 220kV main transformer and a 110kV line according to the switch needing to be disconnected and the switch needing to be closed, otherwise, finishing the analysis of the section.

Optionally, the analyzing the network operation rack of the power grid and storing various operation structure data in the local system specifically includes:

through analysis of a grid structure of the transformer substation and analysis of a power transmission grid structure, the relation between a main transformer and each side switch, the relation between a main transformer low side and a 10kV bus, the relation between a 10kV bus and a subsection/bus connection, the relation between a main transformer and a measuring point acquisition point, the relation between a line power supply side and a load side, the relation between a 220kV main transformer and a 110kV loaded power transmission line, the relation between a 220kV main transformer and a 110kV standby line, a 110kV standby line structure, a 110kV line serial operation transformer substation structure and the relation between a standby line and a standby switch in a power grid are stored in the local system.

Optionally, the setting of the switching mode of the 110kV main transformer according to various operation configuration data of the local system includes:

in various operation structure data, the analysis equipment searches a load side and a power supply side of a superior power supply line as solution point positions respectively, searches a standby 110kV switch and a corresponding superior line thereof as a standby line, and searches a live main transformer of the standby circuit, thereby obtaining a first switching mode of the 110kV main transformer.

in various operation structure data, searching a superior power supply line through the analysis equipment, searching corresponding superior equipment as a solution point position according to the superior power supply line, and searching a 220kV main transformer as a standby main transformer, thereby obtaining a second switching mode of the 110kV main transformer.

in various operation structure data, searching a superior power supply line as a point-solving position and searching a corresponding line through the analysis equipment, and using a non-registering line switch with a 220kV side switch state of disconnection in the corresponding line as a standby switch and a 220kV main transformer as a standby main transformer so as to obtain a third switching mode of the 110kV main transformer.

and searching a 10kV spare switch corresponding to the 110kV main transformer as a spare 110kV main transformer in various operation structure data, and taking a switch at a position of a high transformer as a disconnection point position to obtain a switching mode of the 10kV spare switch.

Optionally, after step S5, the method further includes: and (5) carrying out transfer influence analysis on the section and calculating the load rate.

The second aspect of the present application provides a system for analyzing a section power supply range and stability control measures, the system comprising:

the first judging unit is used for judging whether the section information of the local system section is the same as the section information of the SCADA system or not, if so, the administrator is informed to modify the section information, and if not, the second judging unit is triggered;

the second judging unit is used for judging whether the section information is manually modified, if so, the analysis of the section is finished, and otherwise, the third judging unit is triggered;

the third judging unit is used for carrying out topology on the equipment of the section to obtain the component equipment of the section, judging whether the number of the component equipment is equal to 1 or not, if so, triggering the analyzing unit, and otherwise, triggering the fourth judging unit;

a fourth judging unit, configured to judge whether the component device is in a topology result corresponding to the remaining component devices of the component device, if so, put the component device in a lower boundary device group, otherwise, put the component device in an upper boundary device group;

the fifth judging unit is used for judging whether the topological path corresponding to the upper boundary equipment group comprises a bus of 220KV or not, if so, the analyzing unit is triggered, and otherwise, the section is marked as an invalid section;

and the analysis unit is used for initializing the load coefficient of the equipment forming the section, analyzing the power supply range of the section and analyzing the stability control measure of the section.

According to the technical scheme, the method has the following advantages:

the application provides a method for analyzing a section power supply range and stability control measures, which comprises the following steps: s1, judging whether the section information of the local system section is the same as the section information of the SCADA system, if so, informing an administrator to modify the section information, otherwise, executing the step S2; s2, judging whether the section information is manually modified, if so, finishing the analysis of the section, otherwise, executing the step S3; s3, carrying out topology acquisition on the equipment of the section to obtain the component equipment of the section, judging whether the number of the component equipment is equal to 1, if so, executing a step S6, otherwise, executing a step S4; s4, judging whether the composition equipment is in the topology result corresponding to the rest composition equipment of the composition equipment, if yes, placing the composition equipment in the lower boundary equipment group, otherwise, placing the composition equipment in the upper boundary equipment group; s5, judging whether the topological path corresponding to the upper boundary equipment group contains a bus of 220kV in the same section, if so, executing a step S6, otherwise, marking the section as an invalid section; s6, initializing the load coefficient of the equipment forming the section, analyzing the power supply range of the section, and analyzing the stability control measure of the section.

The section power supply range and stability control measure analysis method comprises the steps of comparing a section to be analyzed in a local system with section information of an SCADA system, then carrying out topology on section equipment to obtain sectional component equipment, grouping the component equipment, judging whether a topological path corresponding to an upper boundary equipment group after grouping comprises a bus of 220kV in the same section, determining whether the section is an invalid section, increasing section validity verification before section power supply range and stability control measure analysis, and eliminating the invalid section, so that the invalid section does not need to be analyzed in the subsequent section power supply range and stability control measure analysis, and further the analysis efficiency is improved.

Furthermore, the method also aims at judging whether the 110kV main transformer equipment in the section has the roll-out condition, and by carrying out power grid full-operation architecture analysis in advance and storing the result, the main transformer equipment does not need to be searched for power supply electrical topology which is against the current direction and passes through a disconnecting switch, and any main transformer equipment can carry out analysis on whether the 110kV main transformer equipment has the roll-out condition in the stored result.

Drawings

Fig. 1 is a schematic flowchart of a first embodiment of a method for analyzing a section power supply range and a stability control measure provided in an embodiment of the present application;

fig. 2 is a schematic flowchart of a second embodiment of a method for analyzing a section power supply range and a stability control measure provided in the embodiment of the present application;

fig. 3 is a structural diagram of an embodiment of a system for analyzing a section power supply range and a stability control measure provided in an embodiment of the present application;

fig. 4 is a technical architecture diagram of the present application provided in an embodiment of the present application.

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the data in the following examples are derived from: an SCADA system and a local system; wherein: the SCADA system includes: the basic machine account information of the power grid, such as: station information, primary equipment information and the like, a primary equipment connection relation table, an equipment listing table, a real-time E file (primary equipment remote measurement and remote signaling data), an equipment current limit table, a stable control operation control section value table file (a vector file in an XML format and with SVG as suffix), primary equipment measuring point information and the like;

the local system includes: the stability control execution station maintenance table, the sections and the sections form an equipment table; the method is characterized in that maintenance is carried out by a serviceman, wherein part of 220kV transformer substations and cut-out line sequence information of the transformer substations are defined in a maintenance table of a stability control execution station, and a section and section composition equipment table consists of a section name (which needs to be consistent with the name in a stability control operation control section surface value table file), a control value, the stability control execution station, a real-time load rate, validity or not, manual modification or not, section composition equipment and a load coefficient.

The general technical architecture diagram of the present application is shown in fig. 4, which comprises: the method comprises the following steps of section validity verification, section power supply range analysis, power grid operation structure analysis, stability control measure analysis, supply impact analysis and section load rate calculation.

It should be noted that, the first embodiment below mainly describes that, compared with the newly added section validity verification in the prior art, the invalid section is removed, so that the analysis efficiency is improved by the subsequent power supply range analysis and stability control measure analysis. In the second embodiment, section validity verification and power grid operation structure analysis are mainly described, power grid operation structure analysis does not need to perform power supply electrical topology search against a current direction and through a disconnecting switch on the main transformer equipment, and any main transformer equipment can perform condition analysis on whether 110kV main transformer equipment has a transfer-out condition or not in a stored result. Furthermore, due to the fact that section validity verification is added and power grid operation structure analysis is provided, the transfer influence analysis and the section load rate calculation are different from those of the prior art, and therefore the corresponding transfer influence analysis and the corresponding section load rate calculation are further provided.

Referring to fig. 1, fig. 1 is a schematic flow chart of a first embodiment of a method for analyzing a cross-section power supply range and a stability control measure provided in an embodiment of the present application.

The method for analyzing the section power supply range and the stability control measure provided by the embodiment includes the following steps:

step 101, judging whether the section information of the local system section is the same as the section information of the SCADA system, if so, notifying an administrator to modify the section information, otherwise, executing step 102.

Before determining whether the section information of the local system section is the same as the section information of the SCADA system, the section file needs to be analyzed. Specifically, the method comprises the following steps: s101, analyzing a stable control operation control section surface value table file in an XML format of the SCADA system to obtain a character object list and a numerical value object list. S102, the character object list obtained by the analysis in the step S101 stores the character objects containing the key words (line or # or change) and the numerical values of the corresponding sequences of the numerical object list as the section names of the master station system and the corresponding control values thereof (section information); s103, acquiring the section name and the section control value (section information) of any section from the section and section composition equipment table of the local system.

And judging whether the section information of the local system section is the same as the section information of the SCADA system, namely whether the section information is consistent and complete, if so, informing an administrator to modify the section information, and if not, executing the step 102.

And 102, judging whether the section information is manually modified, if so, finishing the analysis of the section, and otherwise, executing a step 103.

It should be noted that if the "modification" field of the cross section in the cross section and component device table is "yes", the analysis of the cross section is ended, otherwise, step 103 is executed.

Step 103, topology is carried out on the equipment of the section to obtain the component equipment of the section, whether the number of the component equipment is equal to 1 or not is judged, if yes, step 105 is executed, and if not, step 104 is executed.

It should be noted that, the specific method for performing topology on the cross-section device provided in this embodiment is as follows:

if the starting point equipment is a 500kV main transformer, the primary equipment ledger information and a primary equipment connection relation table are inquired, and the topology is changed to the middle side of the main transformer; and carrying out topology analysis on the outgoing direction of a rear-to-middle-side edge-to-middle switch, the local station 220kV bus, the local station 220kV outgoing line, the opposite side 220kV substation incoming line, the opposite side 220kV substation bus and the opposite side 220kV substation bus. For the 220kV buses running in parallel, the bus-tie power direction is not considered during topology analysis. And after the topology analysis is completed, correspondingly storing the 500kV main transformer starting point equipment, the 220kV bus of the 220kV transformer substation on the topology path and the 220kV line switch in the system.

If the starting point equipment is a 220kV line switch, topology analysis is carried out along the directions of power supply 220kV bus-220 kV outgoing line-opposite side 220kV incoming line-opposite side 220kV bus-opposite side 220kV outgoing line according to the power flow direction by inquiring primary equipment standing account information and a primary equipment connection relation table. And after the topology analysis is completed, correspondingly storing the 220kV line switch starting point equipment, a 220kV bus of a 220kV transformer substation on the topology path and the 220kV line switch in the system.

And obtaining the composition equipment of the section by the topological method, and judging whether the number of the composition equipment is equal to 1, if so, executing the step 106, otherwise, executing the step 104.

Step 104, judging whether the composition equipment is in the topology result corresponding to the rest composition equipment of the composition equipment, if so, putting the composition equipment into a lower boundary equipment group, otherwise, putting the composition equipment into an upper boundary equipment group;

and 105, judging whether the topological path corresponding to the upper boundary equipment group comprises a bus of 220kV in the same section, if so, executing the step 106, and otherwise, marking the section as an invalid section.

It should be noted that, the specific method of grouping in this embodiment is as follows: if the cross section composition device can obtain the topology result corresponding to other residual composition devices in the step 103, the cross section composition device is placed into the cross section lower boundary device group, otherwise, the cross section upper boundary device group is placed into the cross section lower boundary device group. And after grouping is finished, judging whether the topological path corresponding to the upper boundary equipment group contains the bus of the same 220kV, if so, executing the step 106, and otherwise, marking the section as an invalid section.

It should be noted that, further, if the section has particularity and the validity of the section cannot be judged through the above method, the service person may modify the "valid or not" attribute to "yes" and modify the "manually or not" attribute to "yes" through the system maintenance page, and at the same time, manually set the load factor of each component switch.

And 106, initializing the load coefficient of the equipment forming the section, and analyzing the power supply range of the section and the stability control measure of the section.

And initializing the load coefficient of the equipment forming the section on the effective section so as to perform power supply range analysis on the section and perform stability control measure analysis on the section in the following.

The section power supply range and stability control measure analysis method comprises the steps of comparing a section to be analyzed in a local system with section information of an SCADA system, then carrying out topology on section equipment to obtain section constituent equipment, grouping the constituent equipment, judging whether a topological path corresponding to an upper boundary equipment group after grouping comprises a 220KV bus or not, determining whether the section is an invalid section or not, increasing section validity verification before section power supply range and stability control measure analysis, eliminating the invalid section, enabling the invalid section not to be analyzed in the subsequent section power supply range and stability control measure analysis, and further improving analysis efficiency.

The above is a first embodiment of a method for analyzing a power supply range and a stability control measure of a cross section provided by the present application, and the following is a second embodiment of the method for analyzing a power supply range and a stability control measure of a cross section provided by the present application.

Referring to fig. 2, fig. 2 is a flowchart illustrating a second embodiment of a method for analyzing a cross-section power supply range and a stability control measure provided in the embodiment of the present application.

The second embodiment provides a method for analyzing a section power supply range and stability control measures, which includes:

step 201, judging whether the section information of the local system section is the same as the section information of the SCADA system, if so, notifying an administrator to modify the section information, otherwise, executing step 202.

Step 201 of this embodiment is the same as step 101 of the first embodiment, please refer to step 101, and will not be described herein again.

Step 202, judging whether the section information is modified manually, if so, ending the analysis of the section, otherwise, executing step 203.

Step 202 of this embodiment is the same as the description of step 102 of the first embodiment, please refer to step 102, which is not described herein again.

Step 203, topology is performed on the devices on the cross section to obtain the component devices on the cross section, and whether the number of the component devices is equal to 1 or not is judged, if yes, step 205 is executed, and if not, step 204 is executed.

Step 203 of this embodiment is the same as the description of step 103 of the first embodiment, please refer to step 103, which is not described herein again.

And 204, judging whether the composition equipment is in the topology results corresponding to the rest composition equipment of the composition equipment, if so, putting the composition equipment into the lower boundary equipment group, otherwise, putting the composition equipment into the upper boundary equipment group.

Step 204 of this embodiment is the same as step 104 of the first embodiment, please refer to step 104 for description, and will not be described herein again.

And step 205, judging whether the topological path corresponding to the upper boundary equipment group comprises a bus of 220kV in the same section, if so, executing step 206, otherwise, marking the section as an invalid section.

Step 205 of this embodiment is the same as the description of step 105 of the first embodiment, please refer to step 105, which is not described herein again.

It should be noted that

steps

206 and 207 are the description of the cross-sectional power supply range analysis in fig. 4 of the present application.

And step 206, initializing the load coefficients of the component equipment of the section, setting the component equipment with the load coefficient not less than zero as a topology starting point, setting the component equipment with the load coefficient less than zero as a topology end point, and respectively obtaining each 220kV main transformer and each 110kV main transformer according to the first topology path, the second topology path and the third topology path.

In this embodiment, first, the load coefficients of the component devices of the cross section are initialized, then the component devices with the load coefficients not less than zero are set as the topology start points, the component devices with the load coefficients less than zero are set as the topology end points, and then the topology is performed according to the following topology paths.

The first topological path, the second topological path, and the third topological path of this embodiment are specifically:

a first topological path: in a 500kV station, topology searching is carried out along a-220 kV bus-coupler/segmented-220 kV bus-220 kV outgoing switch in a main transformer from a 500kV main transformer by inquiring primary equipment standing account information and a primary equipment connection relation table;

a second topological path: in the 220kV station, by inquiring primary equipment account information and a primary equipment connection relation table, topology searching is respectively carried out on a 220kV bus-coupled/segmented-220 kV bus-220 kV outgoing line and a 220kV bus-main transformer variable-main transformer medium-110 kV bus-110 kV outgoing line or a 110kV bus-coupled/segmented-110 kV bus-110 kV outgoing line from a 220kV incoming line according to the power direction;

the third topological path: in the 110kV station, by inquiring primary equipment account information and a primary equipment connection relation table, starting from a 110kV incoming line, respectively carrying out topology search on a 110kV bus-110 kV outgoing line or a 110kV bus coupler/subsection-110 kV bus-110 kV outgoing line and a 110kV bus-main transformer variable-main transformer according to the power direction;

it should be noted that, the topology start ends or the topology tail ends in each station are sequentially spliced through the line according to the active power direction through the line primary equipment ledger information and the line primary equipment connection relation table. And storing the information of each 220kV main transformer and 110kV main transformer obtained by the topology.

And step 207, judging whether the section has a stable control execution station, if so, acquiring a cut-off line corresponding to the stable control execution station and transformer information corresponding to the cut-off line, marking the cut-off line as a cuttable load in the transformer information, and otherwise, finishing the analysis of the section.

And 208, analyzing the network operation grid frame of the power grid, and storing various operation structure data to a local system.

It should be noted that the specific method for analyzing the grid operation grid structure of the embodiment is as follows: through analysis of the grid structure of the transformer substation and analysis of the grid structure of power transmission, the relation between a main transformer and each side switch, the relation between a main transformer low side and a 10kV bus, the relation between a 10kV bus and a subsection/bus connection, the relation between a main transformer and a measuring point acquisition point, the relation between a line power supply side and a load side, the relation between a 220kV main transformer and a 110kV loaded power transmission line, the relation between a 220kV main transformer and a 110kV standby line, a 110kV standby line structure, a 110kV line serial running transformer substation structure and the relation between a standby line and a standby switch in a power grid are stored in the local system

The method specifically comprises the following steps:

110kV main transformer structure: in step S301, a connection relationship analysis of the element structure is mainly performed. The correlation between the 110kV main transformer and the main transformer change-over switch (main transformer change-over disconnecting link for no main transformer switch), the correlation between the 110kV main transformer and the main transformer change-over switch, the correlation between the 110kV main transformer change-over and the change-over side bus, the correlation between the 10kV bus and the 10kV subsection or the bus-tie switch and the like are inquired in the primary equipment standing book table and the primary equipment connection relation table.

The relationship of each side of the 110kV main transformer is as follows: step S302, storing the association relationship between the 110kV main transformer and the main transformer change-over switch (main transformer change-over disconnecting link for no main transformer switch) and the association relationship between the 110kV main transformer and the main transformer change-over switch, which are obtained by the query in step S301, in a structure of "main transformer change-over switch/disconnecting link" - "main transformer change-over switch".

The relationship between a variable-low switch and a bus of a 110kV main transformer is as follows: and step S303, storing the association relationship between the 110kV main transformer and the main transformer change-down switch and the association relationship between the 110kV main transformer change-down and the change-down side bus, which are obtained by inquiring in the step S301, in a structure of 'main transformer' -main transformer change-down switch '-10 kV bus'.

The bus and 10kV bus connection/segmentation relation is as follows: and S304, storing the association relation between the 10kV bus and the 10kV section or bus tie switch obtained by the query in the step S301 in a structure of ' 10kV bus ' -10kV section or bus tie switch '.

The relation between the 110kV main transformer and the measuring equipment and the measuring point equipment is as follows: step S305, in the structure from "main transformer high-voltage switch/disconnecting link" - "main transformer low-voltage switch" obtained in step S302, the main transformer switch is used as load collecting equipment of the main transformer, and the load measuring points of the high-voltage switch are used as load points of the main transformer, when there is no load measuring point of the main transformer high-voltage switch or the corresponding high-voltage disconnecting link, the corresponding low-voltage switch and the corresponding load measuring points of the main transformer in the structure from "main transformer" - "main transformer low-voltage switch" - "10 kV bus" stored in step S303 are used as load collecting equipment of the main transformer and load measuring points of the main transformer, and the structure from "main transformer" - "main transformer load collecting equipment" - "main transformer load measuring points" is stored.

110kV line structure: and S306, inquiring the switch relation between the 110kV line and the branch line and the line of each side in the primary equipment standing book table and the primary equipment connection relation table.

110kV line relation: step S307, the 110kV line, branch line and side line switch relations obtained in step S306 are further subjected to station ledger and station ledger query through the station ledger table and the station ledger table, and results are stored in a structure of ' line ' -main line ' -station-side station ' -line switch '.

Topological relation of 220kV main transformer: and S308, respectively taking the 220kV main transformer as a starting point and the 10kV feeder switch as an end point to perform topology analysis according to the following method, and sequentially storing the equipment (switches, disconnecting links, buses, main transformers and the like) on the topological path into a local system. The main transformer body is used as a starting point, the topology analysis is respectively carried out on the low-voltage side and the middle-voltage side according to the power flow direction, and the low-voltage side topology is stopped after reaching the 10kV bus of the station; and (3) carrying out topology analysis on a main transformer of an opposite side 110kV transformer substation, namely a middle-side edge transformer switch, an own station 110kV bus, an own station 110kV outgoing line, an opposite side 110kV transformer substation bus or line transformer group high-level switch and an opposite side 110kV transformer substation, wherein the direction of bus-coupled power is not considered during topology analysis on the 110kV buses running in parallel. And stopping the directional topology if the equipment on the current topology path can be found from the listing table or the opening and closing state of the current equipment corresponding to the E file is 0.

The operation relation of the 220kV main transformer is as follows: and S309, respectively finding out 110kV loaded line switches in the corresponding stations of the current main transformers from the topological paths stored in the step S308, starting from the '220 kV main transformer', and storing the structures up to the 'loaded 110kV line switches' as the main transformer operation relationship in the 220kV stations in a local system.

110kV line transmission structure of 220kV main transformer: and S310, analyzing the topological path stored in the step S308, and storing the structure which takes the switch of the 110kV loaded line of the 220kV transformer substation as a starting point and the switches on all sides of the line as an end point in a local system as a 110kV line transmission structure of the 220kV substation.

110kV spare line structure of 220kV main transformer: and S311, analyzing the topological path saved in the step S308, searching a disconnected non-registering 110kV switch or a 10kV bus-tie/section switch on the subsequent path by taking the 110kV loaded line switch of the 220kV transformer substation as a starting point, and saving the disconnected non-registering 110kV switch or the 10kV bus-tie/section switch in a local system as a 220kV station 110kV standby line structure in a structural form of 'starting equipment-terminating equipment'.

Line transmission relation structure between 110kV main transformer station: and S312, analyzing the topological path saved in the step S308, searching the existing active inflow of the 110kV line switch in the station and the active outflow of the 110kV line switch by taking the 110kV transformer substation as a unit, and saving the active inflow and the active outflow of the 110kV line switch in the local system by taking the structural form of 'starting equipment-terminating equipment' as a transmission relation structure of the 110kV inter-station line.

Topology in the 110kV main transformer station: step S313, using a main transformer body as a starting point, and respectively carrying out topology towards a high-voltage side and a low-voltage side through a primary equipment association relation table, wherein the high-voltage side carries out topology along a high-voltage switch or a disconnecting link-110 kV bus-110 kV line or a 110kV bus-coupler/segment-110 kV line; and the low-voltage side carries out topology analysis along a low-voltage switch-10 kV bus or a 10kV bus-10 kV section/bus-coupled switch. If any equipment can be inquired in the listing table, the follow-up is terminated; and if the opening and closing state of any equipment in the E file remote sensing is 0, terminating the subsequent search.

110kV circuit station internal operation structure: step S314, based on the result obtained in step S313, stores the line switch that becomes high, obtained from each master topology, as the starting point device, and the master as the terminating device, and stores the "starting and stopping device" structure in the local system.

110kV line station tandem operation structure: and step S315, searching to obtain a serial operation structure through the 110kV inter-station line transmission relation structure obtained in the step S312 and the 110kV line in-station operation structure obtained in the step S314, and storing the local system in a structural form that the starting equipment with the structure of S312 is used as the starting equipment and the corresponding terminating equipment with the structure of S314 is used as the terminating equipment.

110kV line standby switch relation: and step S316, storing the result obtained in step S313 in a local system in a structural form with the loaded 110kV incoming line equipment as a starting point and the disconnected 110kV switch as an end point.

The relationship between the 110kV line and the 10kV standby switch is as follows: and step S317, storing the result obtained in step S313 in a local system in a structural form with the loaded 110kV incoming line equipment as a starting point and the disconnected 10kV switch as an end point.

The relation between a 110kV main transformer and a 10kV standby switch is as follows: in step S318, the result obtained in step S313 is stored in the local system in a configuration format that starts from the main substation and ends with the 10kV switch being off.

And 209, setting the switching mode of the 110kV main transformer by taking the 110kV main transformer with any section as analysis equipment according to various operation structure data of a local system.

It should be noted that, in the various operation configuration data stored in step 208, the analysis device searches for a load side and a power side of a higher-level power supply line as breakpoint positions, respectively, searches for a spare 110kV switch and a higher-level line corresponding to the 110kV switch as a spare line, and searches for a live main transformer of the spare circuit, thereby obtaining a first switching mode of the 110kV main transformer.

And searching a superior power supply line through the analysis equipment, searching corresponding superior equipment as a solution point position according to the superior power supply line, and searching a 220kV main transformer as a standby main transformer, thereby obtaining a second switching mode of the 110kV main transformer.

And searching a superior power supply line as a breakpoint position and a corresponding line through the analysis equipment, wherein a non-registering line switch with a 220kV side switch in a disconnected state in the corresponding line is a standby switch, and a 220kV main transformer is used as a standby main transformer, so that a third switching mode of the 110kV main transformer is obtained.

And searching a 10kV spare switch corresponding to the 110kV main transformer as a spare 110kV main transformer, and using a switch at a position of a variable height as a breakpoint position to obtain a switching mode of the 10kV spare switch.

And step 210, judging whether various devices in the switching mode are in the section power supply range, if so, acquiring a switch needing to be disconnected and a switch needing to be closed according to the switching mode, and determining the affected section, a 220kV main transformer and a 110kV line according to the switch needing to be disconnected and the switch needing to be closed, otherwise, finishing the analysis of the section.

In the present embodiment, the cross section corresponding to the backup main transformer belonging to the first switching mode, the second switching mode, the third switching mode, and the switching mode of the 10kV backup switch in step 209 is taken as the affected cross section; and finding the upper-level 220kV main transformer corresponding to the standby main transformer as the affected 220kV main transformer through the structures of the steps S309, S312 and S314. And finding the standby line as the affected 110kV line through the structure of steps S313, S309 and S312.

In an optional embodiment, after initializing the load coefficients of the constituent devices of the cross section, performing power supply range analysis on the cross section, and performing stability control measure analysis on the cross section, the present application further provides a method for performing transfer influence analysis on the cross section, and calculating a load factor:

specifically, the transshipment impact analysis comprises the following steps:

step S501, calculating load coefficients of each branch of main transformers with branches, searching the number of corresponding low-voltage switches of the same main transformer, which is greater than 1, and main transformers of different buses associated with the low-voltage switches of the main transformer from steps S302 and S303, then searching the corresponding 10kV section/bus-coupled switches from step S304, and establishing a structure of 'main transformer' -10kV section/bus-coupled switch '-load ratio' by taking the load ratio of the low-voltage switches as the load ratio of the 10kV section/bus-coupled switches.

And S502, switching off the switch equipment according to needs and switching on the switch equipment to group the power supply schemes, and grouping the switch equipment to be switched off and the switch equipment to be switched on obtained in the step S407 according to the attribution section, the switch equipment to be switched off and the switch equipment to be switched on, so that the 110kV main transformers to be switched on are in the same group.

And S503, calculating the main transformer transfer-required load according to groups, if the switch needs to be closed to be 10kV equipment, if the switch exists in the step S501, using the proportional coefficient corresponding to the real-time load of the main transformer, and otherwise, directly using the real-time load of the main transformer as the transfer-required load.

And S504, calculating the load change condition of the affected section, wherein the affected section is converted into the post load = affected section real-time load + main transformer required conversion load is calculated according to groups.

And S505, calculating the change condition of the influenced 220kV load, wherein the influenced section is transferred to the rear load = main transformer real-time load + the number of main transformer required transfer load/same 220kV main transformers is calculated according to groups.

And S506, calculating the load change condition of the affected 110kV line, and calculating the main transformer load transfer requirement load according to the group, wherein the load after the affected 110kV line is transferred = the real-time load of the line + the load coefficient of the line.

Specifically, the load factor calculation includes the following steps:

the section real-time load rate =100 (sum of 110kV main transformer loads in the section power supply range-sum of 110kV switchable main transformer loads in the section power supply range)/(0.95 × section control value).

The above is an embodiment two of the method for analyzing the power supply range and the stability control measure of the cross section provided by the present application, and the following is an embodiment of the system for analyzing the power supply range and the stability control measure of the cross section provided by the present application.

Referring to fig. 3, fig. 3 is a structural diagram of an embodiment of a cross-section power supply range and stability control measure analysis system provided in an embodiment of the present application.

The section power supply range and stability control measure analysis system provided by the embodiment comprises:

the first judging unit 301 is configured to judge whether the section information of the local system section is the same as the section information of the SCADA system, notify an administrator to modify the section information if the section information of the local system section is the same as the section information of the SCADA system, and trigger the second judging unit if the section information of the local system section is not the same as the section information of the SCADA system.

The second judging unit 302 is configured to judge whether the section information is modified manually, if so, end analysis of the section, and otherwise, trigger the third judging unit.

The third judging unit 303 is configured to perform topology acquisition on the cross-section device to obtain the cross-section component device, judge whether the number of the component devices is equal to 1, trigger the analyzing unit if the number of the component devices is equal to 1, and trigger the fourth judging unit if the number of the component devices is not equal to 1.

The fourth determining unit 304 is configured to determine whether the component device is in the topology result corresponding to the remaining component devices of the component device, if so, put the component device in the lower boundary device group, otherwise, put the component device in the upper boundary device group.

The fifth determining unit 305 is configured to determine whether the topology path corresponding to the upper boundary device group includes a bus of 220KV, trigger the analyzing unit if yes, and mark the section as an invalid section if not.

The analysis unit 306 is used for initializing the load coefficient of the equipment forming the section, analyzing the power supply range of the section, and analyzing the stability control measure of the section.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A method for analyzing a section power supply range and stability control measures is characterized by comprising the following steps:

2. The method for analyzing the power supply range and the stability control measure of the cross section according to claim 1, wherein the analyzing the power supply range of the cross section specifically comprises:

3. The method for analyzing the power supply range and the stability control measure of the cross section according to claim 2, wherein the analyzing the stability control measure of the cross section specifically comprises:

4. The method for analyzing the section power supply range and the stability control measure according to claim 3, wherein the analyzing the network operation network frame of the power grid and storing various operation structure data to the local system specifically comprises:

5. The method for analyzing the section power supply range and the stability control measure according to claim 3, wherein the setting of the switching mode of the 110kV main transformer according to various operation structure data of the local system comprises:

in various operation structure data, the analysis equipment searches a load side and a power side of a superior power supply line as solution point positions respectively, searches a standby 110kV switch and a corresponding superior line thereof as a standby line, and searches a live main transformer of the standby line, thereby obtaining a first switching mode of the 110kV main transformer.

6. The method for analyzing the section power supply range and the stability control measure according to claim 3, wherein the setting of the switching mode of the 110kV main transformer according to various operation structure data of the local system comprises:

7. The method for analyzing the section power supply range and the stability control measure according to claim 3, wherein the setting of the switching mode of the 110kV main transformer according to various operation structure data of the local system comprises:

8. The method for analyzing the section power supply range and the stability control measure according to claim 3, wherein the setting of the switching mode of the 110kV main transformer according to various operation structure data of the local system comprises:

9. The method for analyzing the section power supply range and the stability control measure according to claim 1, wherein after the step S5, the method further comprises: and (5) carrying out transfer influence analysis on the section and calculating the load rate.

10. A section power supply range and stability control measure analysis system is characterized by comprising: