CN112636469B - Method for judging reliability of power grid transmission line operation load data - Google Patents

Method for judging reliability of power grid transmission line operation load data Download PDF

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Publication number
CN112636469B
CN112636469B CN202011436578.3A CN202011436578A CN112636469B CN 112636469 B CN112636469 B CN 112636469B CN 202011436578 A CN202011436578 A CN 202011436578A CN 112636469 B CN112636469 B CN 112636469B
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China
Prior art keywords
data
node
sum
judging
reliability
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CN202011436578.3A
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CN112636469A (en
Inventor
王文林
凌永标
宋浩杰
罗志丰
程金松
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State Grid Corp of China SGCC
Huanshang Power Supply Co of State Grid Anhui Electric Power Co Ltd
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State Grid Corp of China SGCC
Huanshang Power Supply Co of State Grid Anhui Electric Power Co Ltd
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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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/70—Load identification
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • 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
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/16—Electric power substations
    • 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
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • 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
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a method for judging reliability of operation load data of a power grid transmission line, which comprises the steps of firstly judging whether untrusted data exist or not by regarding each transformer substation as a large node, then judging whether the untrusted data exist or not by regarding each voltage grade bus contained in a power station with the untrusted data as a node, then judging whether the untrusted data exist or not by regarding each voltage grade bus contained in the power station with the untrusted data as a node, finally finding out phases with the untrusted data, realizing accurate judgment of the reliability of the operation load data of the power grid transmission line, and finding out the untrusted data. The method for judging the reliability of the operation load data of the power grid transmission line is simple and reliable, and can be widely applied to the field of judging the reliability of the power grid load data.

Description

Method for judging reliability of operation load data of power grid transmission line
Technical Field
The invention relates to a method for judging the reliability of the operation load data of a power grid transmission line.
Background
In the daily operation of the power grid, supervision is carried out through an SCADA system. However, due to the problems of line faults and equipment faults, the problem that the operation load data of the power transmission line of the power grid is not credible can occur. At present, a simple, quick and reliable method for judging the reliability of the operation load data of the power grid transmission line does not exist.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for simply and reliably judging the reliability of the operation load data of the power grid transmission line.
(II) technical scheme
The invention provides the following technical scheme: a method for judging the reliability of the operation load data of a power grid transmission line comprises the following steps:
step (1), in an SCADA system, regarding each transformer substation as a large node in a topological comparison mode, wherein the input is negative, the output is positive, the sum of the loads of all power transmission lines in topological relation with the transformer substation is 0, if the sum is 0, the reliability is represented, and if the sum is not 0, unreliable data exist, and the step (2) is switched to;
step (2), judging each voltage level bus included in the transformer substation with the untrusted data, regarding each voltage level bus as a node, inputting negative voltage and outputting positive voltage, and taking the sum of all branch currents in topological relation with the node as a node, wherein if the sum is 0, the node is trusted, and if the sum is not 0, the node has the untrusted data, and turning to step (3);
step (3) taking the bus with the unreliable data as a determination unit, comparing the three-phase currents of the corresponding lines, and if the difference value between the three-phase currents is within a set range value, determining that the three-phase current data of the line is reliable; otherwise, judging that the three-phase current data of the line is not credible, and turning to the step (4);
and (4) on the SCADA system, displaying the current value of the line of the opposite-side substation which is connected with the line and has the same voltage level and credible data instead to obtain credible load data.
(III) advantageous effects
Compared with the prior art, the method for judging the reliability of the operation load data of the power grid transmission line comprises the steps of firstly judging whether the unreliable data exists or not by regarding each transformer substation as a large node, then judging whether the unreliable data exists or not by regarding each voltage level bus contained in a power station with the unreliable data as a node, judging whether the unreliable data exists or not by regarding the bus with the unreliable data as a three-phase corresponding to the three phases, finally finding out the phase with the unreliable data, realizing the accurate judgment of the reliability of the operation load data of the power grid transmission line, and finding out the unreliable data. Meanwhile, the credible load data can be obtained by replacing and displaying the current value of the line of the opposite-side transformer substation with credible data. The positioning of the untrusted data and the replacement of the untrusted data are achieved, and a foundation is provided for the normal operation of the power grid.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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 invention.
A method for judging the reliability of the operation load data of a power grid transmission line comprises the following steps:
step (1), regarding each transformer substation as a large node in an SCADA system in a topology comparison mode, wherein the input is negative, the output is positive, the sum of the loads of all power transmission lines in topological relation with the transformer substation is 0, if the sum is credible, and if the sum is not 0, incredible data exists, and the step (2) is carried out;
step (2), judging each voltage level bus included in the transformer substation with the untrusted data, regarding each voltage level bus as a node, inputting negative voltage and outputting positive voltage, and taking the sum of all branch currents in topological relation with the node as a node, wherein if the sum is 0, the node is trusted, and if the sum is not 0, the node has the untrusted data, and turning to step (3);
step (3) taking the bus with the unreliable data as a determination unit, comparing the three-phase currents of the corresponding lines, and if the difference value between the three-phase currents is within a set range value, determining that the three-phase current data of the line is reliable; otherwise, judging that the three-phase current data of the line is not credible, and turning to the step (4);
and (4) on the SCADA system, displaying the current value of the line of the opposite-side substation which is connected with the line and has the same voltage level and credible data instead to obtain credible load data.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (1)

1. A method for judging reliability of operation load data of a power grid transmission line is characterized by comprising the following steps: the method comprises the following steps:
step (1), in an SCADA system, regarding each transformer substation as a large node in a topological comparison mode, wherein the input is negative, the output is positive, the sum of the loads of all power transmission lines in topological relation with the transformer substation is 0, if the sum is 0, the reliability is represented, and if the sum is not 0, unreliable data exist, and the step (2) is switched to;
step (2), judging each voltage level bus included in the transformer substation with the untrusted data, regarding each voltage level bus as a node, inputting negative voltage and outputting positive voltage, and taking the sum of all branch currents in topological relation with the node as a node, wherein if the sum is 0, the node is trusted, and if the sum is not 0, the node has the untrusted data, and turning to step (3);
step (3) taking the bus with the unreliable data as a determination unit, comparing the three-phase currents of the corresponding lines, and if the difference value between the three-phase currents is within a set range value, determining that the three-phase current data of the line is reliable; otherwise, judging that the three-phase current data of the line is not credible, and turning to the step (4);
and (4) on the SCADA system, displaying the current value of the line of the opposite-side substation which is connected with the line and has the same voltage level and credible data instead to obtain credible load data.
CN202011436578.3A 2020-12-11 2020-12-11 Method for judging reliability of power grid transmission line operation load data Active CN112636469B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106154084A (en) * 2016-07-18 2016-11-23 国家电网公司 Network load exception and operation risk real-time monitoring and early warning method
CN109787224A (en) * 2019-01-23 2019-05-21 中国电力科学研究院有限公司 Method for generating regional power grid load transfer strategy for preventing cascading overload
CN111007439A (en) * 2019-12-24 2020-04-14 深圳供电局有限公司 Transformer substation bus protection secondary circuit commissioning on-load test method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018011843A1 (en) * 2016-07-11 2018-01-18 株式会社日立製作所 Power grid stabilization system and stabilization method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106154084A (en) * 2016-07-18 2016-11-23 国家电网公司 Network load exception and operation risk real-time monitoring and early warning method
CN109787224A (en) * 2019-01-23 2019-05-21 中国电力科学研究院有限公司 Method for generating regional power grid load transfer strategy for preventing cascading overload
CN111007439A (en) * 2019-12-24 2020-04-14 深圳供电局有限公司 Transformer substation bus protection secondary circuit commissioning on-load test method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
基于可信度的电缆配电网不良数据辨识与修正;刘健 等;《电力自动化设备》;20140228;第67-72页 *

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