CN114374205B - Load transfer analysis method and device - Google Patents
Load transfer analysis method and device Download PDFInfo
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- CN114374205B CN114374205B CN202210285260.2A CN202210285260A CN114374205B CN 114374205 B CN114374205 B CN 114374205B CN 202210285260 A CN202210285260 A CN 202210285260A CN 114374205 B CN114374205 B CN 114374205B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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Abstract
The invention discloses a method and a device for analyzing load transfer, wherein the method comprises the following steps: the method comprises the steps of obtaining basic information of an object to be analyzed and type information of a spare power automatic switching device corresponding to the object to be analyzed, calculating transfer load data and a transfer current value of the object to be analyzed under the condition of N-1 based on the basic information, carrying out load transfer analysis according to the type information of the spare power automatic switching device, the transfer load data and the transfer current value to obtain a line switching load rate of the spare power automatic switching device, and analyzing the load transfer condition of the object to be analyzed based on the switching load rate, the transfer load data and the transfer current value to obtain a load transfer influence report. The invention ensures the safe and reliable operation of the power grid through a load transfer analysis method.
Description
Technical Field
The invention relates to the field of analyzing load transfer influence, in particular to a load transfer analysis method and a load transfer analysis device.
Background
After the N-1 of the power grid equipment fails, load transfer is caused by the spare power automatic switching action, and the equipment can be overloaded. When the dispatching desk predicts accidents, the load shifting situation must be fully considered, and then the overload situation is analyzed by combining the rated limit value of the equipment, and the countermeasures are considered in advance.
The existing technical means only realize the analysis of the voltage loss, the spare power automatic switching action and the topology change caused after the equipment N-1, but do not further analyze the load transfer and the equipment overload condition caused by the analysis.
Therefore, in order to ensure safe and reliable operation of a power grid and solve the technical problem that the load transfer and equipment overload conditions caused after the equipment N-1 is not further analyzed by the existing technical means, a load transfer analysis method is urgently needed to be constructed.
Disclosure of Invention
The invention provides a load transfer analysis method and a load transfer analysis device, which solve the technical problems of load transfer and equipment overload conditions caused by the fact that the existing technical means does not further analyze equipment N-1.
In a first aspect, the present invention provides a method for analyzing load transfer, including:
acquiring basic information of an object to be analyzed and type information of a spare power automatic switching switch corresponding to the object to be analyzed;
based on the basic information, calculating the transfer load data and the transfer current value of the object to be analyzed under the condition of N-1;
performing load transfer analysis according to the type information of the backup power automatic switching switch, the transfer load data and the transfer current value to obtain a line switch load rate of the backup power automatic switching switch;
And analyzing the load transfer condition of the object to be analyzed based on the switching load rate, the transfer load data and the transfer current value to obtain a load transfer influence report.
Optionally, performing load transfer analysis according to the type information of the backup power automatic switching device, the transfer load data, and the transfer current value to obtain a line switching load rate of the backup power automatic switching device, including:
calculating the switch number of the corresponding lines of the automatic bus transfer switch according to the type information of the automatic bus transfer switch;
and calculating the line switching load rate of the spare power automatic switching device based on the number of the switches, the transfer load data and the transfer current value.
Optionally, the type information of the spare power automatic switching device comprises a 35kV class type and a 10kV class type; after the switch number of the corresponding lines of the spare power automatic switching device is calculated according to the type information of the spare power automatic switching device, the method further comprises the following steps:
when the type of the spare power automatic switching switch is 35kV grade type or 10kV grade type, screening out a main transformer, a main transformer low-down switch and a main transformer high-down switch which are influenced in a circuit of the spare power automatic switching switch, and calculating to obtain the load rate of the main transformer, the load rate of the main transformer low-down switch and the load rate of the main transformer high-down switch based on the transfer load data and the transfer current value.
Optionally, analyzing the load transfer condition of the object to be analyzed based on the switching load rate, the transfer load data, and the transfer current value to obtain a load transfer influence report, including:
performing load transfer analysis on the object to be analyzed based on the switching load rate, the transfer load data and the transfer current value to obtain load transfer analysis result information;
and generating the load transfer influence report according to the load transfer analysis result information.
Optionally, based on the switching load rate, performing load transfer analysis on the object to be analyzed to obtain load transfer analysis result information, where the load transfer analysis result information includes:
calculating load data of a 220kV station side 110kV line switch, a main transformer variable height switch and a main transformer variable middle switch of the object to be analyzed based on the switching load rate, the transfer load data and the transfer current numerical value;
and performing load transfer analysis on the object to be analyzed based on the load data to obtain load transfer analysis result information.
In a second aspect, the present invention provides an analysis device for load shifting, comprising:
the acquisition module is used for acquiring basic information of an object to be analyzed and type information of a spare power automatic switching switch corresponding to the object to be analyzed;
The calculation module is used for calculating the transfer load data and the transfer current value of the object to be analyzed under the condition of N-1 based on the basic information;
the load module is used for carrying out load transfer analysis according to the type information of the automatic backup power switching switch, the transfer load data and the transfer current value to obtain the line switch load rate of the automatic backup power switching switch;
and the influence module is used for analyzing the load transfer condition of the object to be analyzed based on the switching load rate, the transfer load data and the transfer current value to obtain a load transfer influence report.
Optionally, the load module comprises:
the quantity submodule is used for calculating the switch quantity of a circuit corresponding to the spare power automatic switching switch according to the type information of the spare power automatic switching switch;
and the load submodule is used for calculating the line switching load rate of the spare power automatic switching device based on the switch number, the transfer load data and the transfer current value.
Optionally, the type information of the spare power automatic switching device comprises a 35kV class type and a 10kV class type; the device further comprises:
and the screening module is used for screening a main transformer, a main transformer change-down switch and a main transformer change-up switch which are influenced in a circuit of the spare power automatic switching switch when the type of the spare power automatic switching switch is 35kV grade type or 10kV grade type, and calculating the load rate of the main transformer, the load rate of the main transformer change-down switch and the load rate of the main transformer change-up switch based on the transfer load data and the transfer current value.
Optionally, the influencing module comprises:
the analysis submodule is used for carrying out load transfer analysis on the object to be analyzed based on the switching load rate, the transfer load data and the transfer current value to obtain load transfer analysis result information;
and the influence sub-module is used for generating the load transfer influence report according to the load transfer analysis result information.
Optionally, the analysis submodule comprises:
the load unit is used for calculating and obtaining the load data of the 220kV station side 110kV line switch, the main transformer variable height switch and the main transformer variable middle switch of the object to be analyzed based on the switching load rate, the transfer load data and the transfer current numerical value;
and the analysis unit is used for carrying out load transfer analysis on the object to be analyzed based on the load data to obtain load transfer analysis result information.
According to the technical scheme, the invention has the following advantages: the invention provides an analysis method of load transfer, which comprises the steps of obtaining basic information of an object to be analyzed and type information of a spare power automatic switch corresponding to the object to be analyzed, calculating transfer load data and a transfer current value of the object to be analyzed under the condition of N-1 based on the basic information, carrying out load transfer analysis according to the type information of the spare power automatic switch, the transfer load data and the transfer current value to obtain a line switch load rate of the spare power automatic switch, analyzing the load transfer condition of the object to be analyzed based on the switch load rate, the transfer load data and the transfer current value to obtain a load transfer influence report, and solving the technical problems of load transfer and equipment overload condition caused by the fact that an existing technical means does not further analyze equipment N-1 through an analysis method of load transfer, the safe and reliable operation of the power grid is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a flowchart illustrating a first embodiment of a method for analyzing load shifting according to the present invention;
FIG. 2 is a flowchart illustrating a second embodiment of a method for analyzing load shifting according to the present invention;
fig. 3 is a block diagram of an embodiment of the load shift analysis apparatus according to the present invention.
Detailed Description
The embodiment of the invention provides a load transfer analysis method and a load transfer analysis device, which are used for solving the technical problems of load transfer and equipment overload conditions caused by the fact that the existing technical means does not further analyze the equipment N-1.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart of a first embodiment of a method for analyzing load shifting according to the present invention, including:
step S101, obtaining basic information of an object to be analyzed and type information of a spare power automatic switching switch corresponding to the object to be analyzed;
it should be noted that the object to be analyzed includes a 110kV main transformer and a 110kV line.
Step S102, based on the basic information, calculating the transfer load data and the transfer current value of the object to be analyzed under the condition of N-1;
step S103, carrying out load transfer analysis according to the type information of the backup power automatic switching switch, the transfer load data and the transfer current value to obtain the line switch load rate of the backup power automatic switching switch;
and step S104, analyzing the load transfer condition of the object to be analyzed based on the switching load rate, the transfer load data and the transfer current value to obtain a load transfer influence report.
In the analysis method for load transfer provided in the embodiment of the present invention, by obtaining the basic information of the object to be analyzed and the type information of the backup power automatic switch corresponding to the object to be analyzed, based on the basic information, the transfer load data and the transfer current value of the object to be analyzed under the condition of N-1 are calculated, based on the type information of the backup power automatic switch, the transfer load data and the transfer current value, a load transfer analysis is performed to obtain the line switch load rate of the backup power automatic switch, based on the switch load rate, the transfer load data and the transfer current value, the load transfer condition of the object to be analyzed is analyzed to obtain a load transfer influence report, and by using a load transfer analysis method, the technical problem that the load transfer and the device overload condition caused by the fact that the existing technical means does not further analyze the device N-1 is solved, the safe and reliable operation of the power grid is guaranteed.
In a second embodiment, please refer to fig. 2, wherein fig. 2 is a flowchart illustrating a method for analyzing load shifting according to the present invention, including:
step S201, obtaining basic information of an object to be analyzed and type information of a spare power automatic switching switch corresponding to the object to be analyzed;
in the embodiment of the invention, the basic information of the object to be analyzed and the type information of the spare power automatic switching device corresponding to the object to be analyzed are obtained.
In the specific implementation, an object to be analyzed is selected, and basic information of the object to be analyzed is obtained. And obtaining an object to be analyzed from the auxiliary decision making system, wherein the object to be analyzed comprises a 110kV main transformer and a 110kV line. The object to be analyzed satisfies the following conditions: 1) the equipment attribute is 110kV main transformer or 110kV line; 2) the voltage level is 110 kV; 3) hanging no overhaul tag; 4) and (4) non-power plant step-up transformer.
And inquiring a corresponding spare power automatic switching switch under the condition of the object N-1 to be analyzed through the associated power grid equipment N-1 risk result table.
Step S202, based on the basic information, calculating the transfer load data and the transfer current value of the object to be analyzed under the condition of N-1;
in the embodiment of the invention, the transfer load data and the transfer current value of the object to be analyzed under the condition of N-1 are calculated based on the basic information.
In the specific implementation, if an object to be analyzed is a 110kV main transformer, inquiring the load and the current value of a main transformer variable-height switch; and if the object to be analyzed is a 110kV line, inquiring the switch current value of the 110kV line on the 220kV transformer substation side of the line.
Step S203, calculating the switch number of the corresponding circuit of the backup power automatic switch according to the type information of the backup power automatic switch;
it should be noted that the type information of the backup power automatic switching device includes a 110kV class type, a 35kV class type, and a 10kV class type.
In an optional embodiment, after the calculating the number of switches of a line corresponding to the backup power automatic switching switch according to the type information of the backup power automatic switching switch, the method further includes:
when the type of the spare power automatic switching switch is 35kV grade type or 10kV grade type, screening out a main transformer, a main transformer low-level switch and a main transformer high-level switch which are influenced in a circuit of the spare power automatic switching switch, and calculating to obtain the load rate of the main transformer, the load rate of the main transformer low-level switch and the load rate of the main transformer high-level switch based on the transfer load data and the transfer current value.
In the embodiment of the invention, the switch number of the corresponding line of the backup power automatic switch is calculated according to the type information of the backup power automatic switch.
In the specific implementation, the voltage classes of the equipment mainly comprise 110kV class, 10kV and 35 kV. Wherein, 110kV level includes: 110kV line, bus coupler and section switch; the 35kV class includes: 35kV and 10kV section switches.
And judging whether the backup power automatic switching switch is a 110kV line switch or not. If the backup power automatic switching switch is a 110kV line switch, the step S501 is carried out, and the number of the switches of the 110kV line flowing into the station is 1; if the voltage is 110kV bus tie switch or 110kV section switch, the next step is carried out.
And analyzing the number of 110kV line switches flowing into the local station. The calculation rule is as follows: 1. the switch is stored in a topology path table, and the obtained spare power automatic switching switch can be inquired by upward recursive inquiry; 2. the voltage level is 110 kV; 3. the maintenance board is not hung; 4. the state is closed; 5. the switch load value is less than zero; 6. the attribute of the substation to which the switch belongs is consistent with that of the substation to which the spare power automatic switching switch belongs in the steps.
When the type of the spare power automatic switching switch is 35kV grade type or 10kV grade type, screening out a main transformer, a main transformer low-level switch and a main transformer high-level switch which are influenced in a circuit of the spare power automatic switching switch, and calculating to obtain the load rate of the main transformer, the load rate of the main transformer low-level switch and the load rate of the main transformer high-level switch based on the transfer load data and the transfer current value.
And screening the influenced main transformer and low transformer switches. And according to the topological relation of equipment connection, associating a power grid equipment topological path table, and performing upward recursive query to find the main transformer low-level switch. The low-change switch satisfies the following conditions: 1) the equipment attribute is a main transformer low-voltage switch; 2) the voltage grade is 10 kV; 3) hanging no overhaul tag; 4. the switch state is closed; 5) the transformer substation to which the low-level switch belongs is consistent with the transformer substation to which the spare power automatic switching switch belongs.
And screening the affected main transformer change-up switch. And according to the topological relation of equipment connection, associating a power grid equipment topological path table, and performing upward recursive query to find the influence on the main transformer variable-height switch. The main transformer becomes high switch and satisfies the following condition: 1) the equipment attribute is a main transformer variable height switch; 2) the voltage level is 110 kV; 3) the maintenance board is not hung; 4) the switch state is closed; 5) and the transformer substation to which the height-changing switch belongs is consistent with the transformer substation to which the spare power automatic switching switch belongs.
And screening the affected 110kV main transformers. And according to the topological relation of equipment connection, associating a power grid equipment topological path table, and performing upward recursive query to find the main transformer influencing 110 kV. The 110kV main transformer meets the following conditions: 1) the equipment attribute is a main transformer; 2) the voltage level is 110 kV; 3) the maintenance board is not hung; 4) the switch state is off; 5) the transformer substation to which the 110kV main transformer belongs is consistent with the transformer substation to which the backup power automatic switching switch belongs.
And calculating the load factors of the main transformer, the main transformer low-voltage switch and the main transformer high-voltage switch which are influenced. And for the main transformer change-down switch and the main transformer change-up switch in the steps, the current value of the switch is inquired through the associated measurement meter and the real-time remote measurement meter. In combination with the transfer current value, according to the formula: and (4) calculating load rate = (real-time current value + transfer current value)/switching limit value to obtain the load rate of the main transformer low-level switch and the main transformer high-level switch which are influenced. For the 110kV main transformer obtained in the above step, the main transformer load rate = (real-time load value of main transformer variable-height switch + transfer load value)/main transformer capacity.
Step S204, calculating the line switching load rate of the spare power automatic switching device based on the number of the switches, the transfer load data and the transfer current value;
in the embodiment of the invention, the line switching load rate of the spare power automatic switching device is calculated and obtained based on the number of the switches, the transfer load data and the transfer current value.
In a specific implementation, the 110kV line switching duty is calculated. And inquiring the current value of the switch by associating the measurement meter and the real-time remote meter. Combining the transfer current value obtained in the above steps, according to a formula: and (4) calculating the load rate of the 110kV line switch by using the load rate = (real-time current value + transfer current value)/the number of the 110kV line switches flowing into the local station/the switch limit value.
The analysis of the 110kV line switch in the station meets the following conditions: 1) the step of backup power automatic switching switch is stored in a topological path table, and the step of backup power automatic switching switch can be inquired by up recursive inquiry; 2) the voltage level is 110 kV; 3) the maintenance board is not hung; 4) the state is closed; 5) the switch load value is less than zero.
Step S205, based on the switching load rate, the transfer load data and the transfer current value, performing load transfer analysis on the object to be analyzed to obtain load transfer analysis result information;
in an optional embodiment, based on the switching load rate, the transfer load data, and the transfer current value, performing load transfer analysis on the object to be analyzed to obtain load transfer analysis result information, including:
calculating load data of a 220kV station side 110kV line switch, a main transformer variable height switch and a main transformer variable middle switch of the object to be analyzed based on the switching load rate, the transfer load data and the transfer current numerical value;
and performing load transfer analysis on the object to be analyzed based on the load data to obtain load transfer analysis result information.
In the embodiment of the invention, based on the switching load rate, the transfer load data and the transfer current value, the load data of the 220kV station side 110kV line switch, the main transformer variable-height switch and the main transformer variable-middle switch of the object to be analyzed are obtained through calculation, and based on the load data, the object to be analyzed is subjected to load transfer analysis to obtain the load transfer analysis result information.
In a specific implementation, the load is superimposed to a 220kV station side 110kV line switch. The load factor calculation method is identical to the above-described steps, and load factor = (real-time current value + transfer current value)/switching limit value.
The analysis of the switch of the 220kV station side 110kV line switch meets the following conditions: 1) the backup power automatic switching switch is stored in a topological path table, and the backup power automatic switching switch can be inquired by upward recursive inquiry; 2) the voltage level is 110 kV; 3) the maintenance board is not hung; 4) the state is closed; 5) the switch load value is greater than zero.
And the load is superposed to a main transformer, a high-voltage switch and a medium-voltage switch on the 220kV station side. The load factor calculation method is consistent with the above steps, and the load factor = (real-time current value + transfer current value)/switching limit value.
Step S206, generating the load transfer influence report according to the load transfer analysis result information;
in the embodiment of the invention, the load transfer influence report is generated according to the load transfer analysis result information.
In the specific implementation, the load transfer analysis conditions of all the objects to be analyzed after the main transformers N-1 are obtained through the steps, and a load transfer influence report of the power grid equipment N-1 is formed.
In the analysis method for load transfer provided in the embodiment of the present invention, by obtaining the basic information of the object to be analyzed and the type information of the backup power automatic switch corresponding to the object to be analyzed, based on the basic information, the transfer load data and the transfer current value of the object to be analyzed under the condition of N-1 are calculated, based on the type information of the backup power automatic switch, the transfer load data and the transfer current value, a load transfer analysis is performed to obtain the line switch load rate of the backup power automatic switch, based on the switch load rate, the transfer load data and the transfer current value, the load transfer condition of the object to be analyzed is analyzed to obtain a load transfer influence report, and by using a load transfer analysis method, the technical problem that the load transfer and the device overload condition caused by the fact that the existing technical means does not further analyze the device N-1 is solved, the safe and reliable operation of the power grid is guaranteed.
Referring to fig. 3, fig. 3 is a block diagram of an embodiment of an analysis apparatus for load shifting according to the present invention, including:
the acquisition module 301 is configured to acquire basic information of an object to be analyzed and type information of a backup power automatic switching device corresponding to the object to be analyzed;
a calculating module 302, configured to calculate, based on the basic information, transfer load data and a transfer current value of the object to be analyzed under the condition of N-1;
the load module 303 is configured to perform load transfer analysis according to the type information of the backup power automatic switching switch, the transfer load data, and the transfer current value to obtain a line switch load rate of the backup power automatic switching switch;
an influence module 304, configured to analyze a load transfer condition of the object to be analyzed based on the switching load rate, the transfer load data, and the transfer current value, so as to obtain a load transfer influence report.
In an alternative embodiment, the load module 303 includes:
the quantity submodule is used for calculating the switch quantity of a circuit corresponding to the spare power automatic switching switch according to the type information of the spare power automatic switching switch;
and the load submodule is used for calculating the line switching load rate of the spare power automatic switching device based on the switch number, the transfer load data and the transfer current value.
In an optional embodiment, the type information of the backup power automatic switching switch comprises a 35kV class type and a 10kV class type; the device further comprises:
and the screening module is used for screening out a main transformer, a main transformer change-down switch and a main transformer change-up switch which are influenced in a circuit of the automatic backup power switch when the type of the automatic backup power switch is 35kV grade type or 10kV grade type, and calculating the load rate of the main transformer, the load rate of the main transformer change-down switch and the load rate of the main transformer change-up switch based on the transfer load data and the transfer current value.
In an alternative embodiment, the influencing module 304 includes:
the analysis submodule is used for carrying out load transfer analysis on the object to be analyzed based on the switching load rate, the transfer load data and the transfer current value to obtain load transfer analysis result information;
and the influence submodule is used for generating the load transfer influence report according to the load transfer analysis result information.
In an alternative embodiment, the analysis submodule includes:
the load unit is used for calculating and obtaining load data of a 220kV station side 110kV line switch, a main transformer variable height switch and a main transformer variable middle switch of the object to be analyzed based on the switching load rate, the transfer load data and the transfer current numerical value;
And the analysis unit is used for carrying out load transfer analysis on the object to be analyzed based on the load data to obtain load transfer analysis result information.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the method and apparatus disclosed in the present invention can be implemented in other ways. 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 position, or may be distributed on multiple 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 invention 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 may be implemented in the form of hardware, or may also be implemented in the 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 invention may be embodied in the form of a software product, which is stored in a readable storage medium and includes several 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 invention. And the aforementioned readable 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 to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will 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 of the embodiments of the present invention.
Claims (8)
1. A method of analyzing load shifting, comprising:
acquiring basic information of an object to be analyzed and type information of a spare power automatic switching switch corresponding to the object to be analyzed; the object to be analyzed is a 110kV main transformer or a 110kV line;
based on the basic information, calculating the transfer load data and the transfer current value of the object to be analyzed under the condition of N-1;
according to the type information of the backup power automatic switching switch, the transfer load data and the transfer current value, performing load transfer analysis to obtain a line switch load rate of the backup power automatic switching switch, specifically: calculating the switch number of the corresponding circuit of the automatic backup power switch according to the type information of the automatic backup power switch; based on the number of switches, the transfer load data, and the transfer current value, in accordance with a formula: the line switch load rate = (real-time current value + transfer current value) ÷ switch number ÷ switch current limit value), and the line switch load rate is obtained through calculation; the real-time current value is obtained by measuring the object to be analyzed through an associated measuring point table or a real-time telemetering table;
And analyzing the load transfer condition of the object to be analyzed based on the line switch load rate, the transfer load data and the transfer current value to obtain a load transfer influence report.
2. The method for analyzing load transfer according to claim 1, wherein the type information of the backup power automatic switching device includes a 35kV class type and a 10kV class type; after the calculating the number of the switches of the corresponding lines of the backup power automatic switching switch according to the type information of the backup power automatic switching switch, the method further comprises the following steps:
when the type of the spare power automatic switching switch is 35kV grade type or 10kV grade type, screening out a main transformer, a main transformer low-down switch and a main transformer high-down switch which are influenced in a circuit of the spare power automatic switching switch, and calculating to obtain the load rate of the main transformer, the load rate of the main transformer low-down switch and the load rate of the main transformer high-down switch based on the transfer load data and the transfer current value.
3. The method for analyzing load shifting according to claim 1, wherein analyzing the load shifting situation of the object to be analyzed based on the line switch load rate, the shifting load data and the shifting current value to obtain a load shifting influence report comprises:
Performing load transfer analysis on the object to be analyzed based on the line switch load rate, the transfer load data and the transfer current value to obtain load transfer analysis result information;
and generating the load transfer influence report according to the load transfer analysis result information.
4. The method for analyzing load transfer according to claim 3, wherein performing load transfer analysis on the object to be analyzed based on the line switch load rate to obtain load transfer analysis result information includes:
calculating load data of a 220kV station side 110kV line switch, a main transformer variable height switch and a main transformer variable middle switch of the object to be analyzed based on the line switch load rate, the transfer load data and the transfer current value;
and performing load transfer analysis on the object to be analyzed based on the load data to obtain load transfer analysis result information.
5. An analysis device for load transfer, comprising:
the acquisition module is used for acquiring basic information of an object to be analyzed and type information of a spare power automatic switching switch corresponding to the object to be analyzed; the object to be analyzed is a 110kV main transformer or a 110kV line;
The calculation module is used for calculating the transfer load data and the transfer current value of the object to be analyzed under the condition of N-1 based on the basic information;
the load module is used for carrying out load transfer analysis according to the type information of the spare power automatic switching switch, the transfer load data and the transfer current value to obtain the line switch load rate of the spare power automatic switching switch;
the influence module is used for analyzing the load transfer condition of the object to be analyzed based on the line switch load rate, the transfer load data and the transfer current value to obtain a load transfer influence report;
the load module includes:
the quantity submodule is used for calculating the switch quantity of a circuit corresponding to the automatic backup power switch according to the type information of the automatic backup power switch;
a load sub-module for, based on the number of switches, the transferred load data, and the transferred current value, according to a formula: the line switch load rate = (real-time current value + transfer current value) ÷ switch number ÷ switch current limit value), and the line switch load rate is obtained through calculation; and the real-time current value is obtained by measuring the object to be analyzed through an associated measuring point table or a real-time telemetering table.
6. The load transfer analysis device according to claim 5, wherein the type information of the backup power automatic switching device includes a 35kV class type and a 10kV class type; the device further comprises:
and the screening module is used for screening out a main transformer, a main transformer change-down switch and a main transformer change-up switch which are influenced in a circuit of the backup automatic switching switch when the type of the backup automatic switching switch is 35kV grade type or 10kV grade type, and calculating to obtain the load rate of the main transformer, the load rate of the main transformer change-down switch and the load rate of the main transformer change-up switch based on the transfer load data and the transfer current value.
7. The apparatus for analyzing load shifting according to claim 5, wherein the influencing module comprises:
the analysis submodule is used for carrying out load transfer analysis on the object to be analyzed based on the line switch load rate, the transfer load data and the transfer current value to obtain load transfer analysis result information;
and the influence sub-module is used for generating the load transfer influence report according to the load transfer analysis result information.
8. The apparatus for analyzing load shifting according to claim 7, wherein the analysis submodule includes:
The load unit is used for calculating and obtaining load data of a 220kV station side 110kV line switch, a main transformer variable height switch and a main transformer variable middle switch of the object to be analyzed based on the line switch load rate, the transfer load data and the transfer current value;
and the analysis unit is used for carrying out load transfer analysis on the object to be analyzed based on the load data to obtain load transfer analysis result information.
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