CN113972673B - Intelligent perception inspection system for line loss of transformer area - Google Patents
Intelligent perception inspection system for line loss of transformer area Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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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
- H02J13/00006—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
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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
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
- 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
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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
- 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
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Abstract
The application relates to an intelligent sensing and auditing system for line loss of a transformer area, which comprises an acquisition module, a first calculation module, a second calculation module, a comparison module, a controller and a power supply; the acquisition module is used for acquiring data; the first calculation module is used for setting a current value; the second calculation module calculates three-phase first unbalance; the comparison module is used for comparing the three-phase unbalance degrees and sending the result to the controller; the controller performs unbalanced phase change operation when unbalance occurs, until the three-phase second unbalance degree is lower than the preset three-phase unbalance degree, and performs line loss inspection operation by gradually reducing samples of a phase change user after the three-phase second unbalance degree is lower than the preset three-phase unbalance degree; and after the controller receives the inspection information, performing line loss inspection operation by gradually reducing samples of the phase change user.
Description
Technical Field
The application belongs to the technical field of intelligent power grid distribution automation, and particularly relates to an intelligent sensing and checking system for line loss of a transformer area.
Background
During the process of delivering and distributing electrical energy, the power loss and the electrical energy loss generated by each element in the electrical power network and other losses, such as power theft or unequal line connection modes, are collectively called line loss (power supply loss), and are simply called line loss. For urban power supply departments, line loss electricity generally comprises all electric energy losses from a main transformer of a transformer substation to a user electric energy meter, the existing line loss possibly cannot be counted into the electric energy meter by bypassing the electric energy meter, so that the line loss is serious, and for a large amount of residents or industrial electricity, due to the large number of users, it is sometimes difficult to directly check out line loss caused by abnormal electricity consumption of the users from a large number of users, and how to check the line loss on the basis of ensuring the power supply safety of a power grid without stopping power supply is a difficulty of power grid intellectualization.
Disclosure of Invention
The application discloses an intelligent sensing and checking system for line loss of a transformer area, which comprises an acquisition module, a first calculation module, a second calculation module, a comparison module, a controller and a power supply;
the collecting module is used for collecting voltage data, current data and total work of load in a first set time period of the user electric energy meter in the transformer area;
the first calculation module is used for determining the average work of each phase in the first set time period through the total work, obtaining the set current value of each phase through dividing the average work by the product of the voltage value of each phase and the first set time period,
the second calculation module is used for receiving the set current value of each phase calculated by the first calculation module, obtaining the actual current value of each phase according to the current data of the acquisition module, calculating the difference value between the set current value of each phase and the actual current value of each phase, and determining the three-phase unbalance of the platform area according to the difference value to obtain the three-phase first unbalance;
the comparison module is used for comparing the three-phase first unbalance degree with a preset three-phase unbalance degree, judging whether the three-phase first unbalance degree is larger than the preset three-phase unbalance degree, outputting a phase-change first prompt message if the three-phase first unbalance degree is larger than the preset three-phase unbalance degree, transmitting the phase-change first prompt message to a controller, and outputting inspection information to the controller if the three-phase first prompt message is not equal to the preset three-phase unbalance degree;
the controller is configured to delay for a period of time after receiving the first prompt information for phase inversion, calculate a three-phase imbalance once through the second calculation module, obtain a three-phase second imbalance, perform unbalanced phase inversion operation if the three-phase second imbalance is still greater than a preset three-phase imbalance, until the three-phase second imbalance is lower than the preset three-phase imbalance, and perform line loss checking operation by gradually reducing samples of a phase inversion user after the three-phase second imbalance is lower than the preset three-phase imbalance; and after the controller receives the inspection information, performing line loss inspection operation by gradually reducing samples of the phase change user.
The intelligent sensing inspection system for the line loss of the transformer area specifically comprises the following steps: randomly selecting an electric energy meter corresponding to a first batch of users from the phase A, calculating the load power of the phase A of the selected electric energy meter, selecting an electric energy meter corresponding to a second batch of users from the phase B, enabling the load power of the electric energy meter corresponding to the second batch of users to be equal to the load power of the phase A, then carrying out phase change on the first batch of users and the second batch of users, after the phase change is completed, recalculating the three-phase imbalance after the phase change to obtain a three-phase third imbalance, and judging whether the three-phase third imbalance is higher than a preset three-phase imbalance or not;
if the three-phase third unbalance is higher than the preset three-phase unbalance, checking whether the load power of the first batch user and the second batch user changes, if the load power changes, selecting to set the first batch user and the second batch user to commutate back to the initial phase again, then calculating the three-phase fourth unbalance, judging whether the three-phase fourth unbalance is higher than the preset three-phase unbalance, if the three-phase fourth unbalance is higher than the preset three-phase unbalance, conducting unbalanced commutation operation, if the three-phase fourth unbalance is not higher than the preset three-phase unbalance, randomly extracting a first sub-batch user and a second sub-batch user from the first batch user and the second batch user, conducting the same commutation operation on the first sub-batch user and the second sub-batch user according to the commutation operation of the first batch user and the second batch user, determining whether the three-phase unbalance exists after the three-phase balance phase commutation exists, if the three-phase unbalance exists in the first sub-batch user and the second sub-batch user, then conducting unbalanced commutation operation on the first sub-batch user and the second sub-batch user, and gradually reducing the number of the first sub-batch user and the second sub-batch user until the number of the first sub-batch user and the second sub-batch user is reduced gradually; if the load power is unchanged, indicating that line loss is abnormal in the first batch user and the second batch user, after the first batch user and the second batch user are subjected to phase change, randomly extracting a first sub-batch user and a second sub-batch user from the first batch user and the second batch user, wherein the first sub-batch user and the second sub-batch user perform the same phase change operation according to the phase change operation of the first batch user and the second batch user and determine whether three-phase imbalance exists after the phase balance phase change before the phase change, if so, indicating that the line loss is abnormal in the first sub-batch user and the second sub-batch user, randomly extracting the first sub-batch user and the second sub-batch user from the first sub-batch user and the second sub-batch user, and gradually reducing the number of the batch users until the user with the abnormal line loss is found;
if the three-phase third unbalance is not higher than the preset three-phase unbalance, determining that no line loss abnormality exists in the first batch of users and the second batch of users, re-selecting one batch of users, and enabling the re-selected users to partially coincide with the first batch of users or the second batch of users.
The intelligent sensing inspection system for the line loss of the transformer area specifically comprises the following steps: randomly selecting an electric energy meter corresponding to a first batch of users from the phase A, calculating the load power of the phase A of the selected electric energy meter, selecting an electric energy meter corresponding to a third batch of users from the phase C, enabling the load power of the electric energy meter corresponding to the third batch of users to be equal to the load power of the phase A, then carrying out phase change on the first batch of users and the third batch of users, after the phase change is completed, recalculating the three-phase imbalance after the phase change to obtain a three-phase third imbalance, and judging whether the three-phase third imbalance is higher than a preset three-phase imbalance or not;
if the three-phase third unbalance is higher than the preset three-phase unbalance, checking whether the load work of the first batch user and the third batch user is changed, if the load work is changed, selecting to set the first batch user and the third batch user to commutate back to the initial phase again, then calculating the three-phase fourth unbalance, judging whether the three-phase fourth unbalance is higher than the preset three-phase unbalance, if the three-phase fourth unbalance is higher than the preset three-phase unbalance, conducting unbalanced commutation operation, if the three-phase fourth unbalance is not higher than the preset three-phase unbalance, randomly extracting a first sub-batch user and a third sub-batch user from the first batch user and the third batch user, conducting identical commutation operation on the first sub-batch user and the third sub-batch user according to the commutation operation of the first batch user and the third batch user, determining whether the three-phase unbalance exists after the three-phase balance commutation exists, if the three-phase unbalance exists in the first sub-batch user and the third sub-batch user, then conducting unbalanced commutation operation on the first sub-batch user and the third sub-batch user, gradually reducing the number of the first sub-batch user and the third sub-batch user until the number of the first sub-batch user and the third sub-batch user is reduced gradually; if the load power is unchanged, indicating that line loss is abnormal in the first batch user and the third batch user, after the first batch user and the third batch user are subjected to phase change, randomly extracting a first sub-batch user and a third sub-batch user from the first batch user and the third batch user, carrying out the same phase change operation on the first sub-batch user and the third sub-batch user according to the phase change operation of the first batch user and the third batch user, determining whether three-phase imbalance exists after the phase balance phase change before the phase change, if so, indicating that the line loss is abnormal in the first sub-batch user and the third sub-batch user, randomly extracting the first sub-batch user and the third sub-batch user from the first sub-batch user and the third sub-batch user, and gradually reducing the number of the batch users until the users with the abnormal line loss is found;
if the three-phase third unbalance is not higher than the preset three-phase unbalance, determining that no line loss abnormality exists in the first batch of users and the third batch of users, re-selecting one batch of users, and enabling the re-selected users to partially coincide with the first batch of users or the third batch of users.
The intelligent sensing inspection system for the line loss of the transformer area determines the three-phase unbalance degree of the transformer area through the difference value, and the obtaining of the three-phase first unbalance degree specifically comprises the following steps: and respectively calculating the difference values of the set current values and the actual current values of A, B, C to respectively obtain an A-phase current difference, a B-phase current difference and a C-phase current difference, comparing the magnitudes of the A-phase current difference, the B-phase current difference and the C-phase current difference, and dividing the maximum current difference among the A-phase current difference, the B-phase current difference and the C-phase current difference by the actual current value corresponding to the minimum current difference by the maximum current difference to obtain the three-phase first unbalance.
The power supply is used for supplying power to the phase change module, the comparison module or the sampling module.
The application provides an intelligent sensing inspection system for line loss of a transformer area, which performs unbalanced phase change operation firstly when unbalance occurs until the three-phase second unbalance is lower than a preset three-phase unbalance, and performs line loss inspection operation by gradually shrinking samples of a phase change user after the three-phase second unbalance is lower than the preset three-phase unbalance; after the controller receives the inspection information, performing line loss inspection operation by gradually reducing samples of a commutation user, wherein the method is used for calculating unbalance degree by setting a difference value between a current value and an actual current value; the application is further improved in that the problem of three-phase unbalance is determined by selecting batch users of each phase to perform phase change operation, samples of batch users are gradually reduced according to the problem of three-phase unbalance, and the samples are gradually approximated to users with abnormal electricity consumption, and the first unbalance degree, the second unbalance degree, the third unbalance degree and the fourth unbalance degree of the three phases are sequentially compared and judged, so that intelligent abnormal user check is realized, intelligent checking of line loss of a station area is realized, and the intellectualization of the electric network check is improved.
Drawings
Fig. 1 is a schematic diagram of an intelligent sensing inspection system for line loss of a transformer area according to the present application.
Fig. 2 is a schematic diagram of an intelligent sensing inspection method for line loss of a transformer area according to the present application.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings, wherein it is to be understood that the following detailed description is for the purpose of further illustrating the application only and is not to be construed as limiting the scope of the application, as various insubstantial modifications and adaptations of the application to those skilled in the art can be made in light of the foregoing disclosure.
Fig. 1 is a schematic diagram of an intelligent sensing and checking system for line loss of a transformer area, which comprises an acquisition module, a first calculation module, a second calculation module, a comparison module, a controller and a power supply;
the collecting module is used for collecting voltage data, current data and total work of load in a first set time period of the user electric energy meter in the transformer area;
the first calculation module is used for determining the average work of each phase in the first set time period through the total work, obtaining the set current value of each phase through dividing the average work by the product of the voltage value of each phase and the first set time period,
the second calculation module is used for receiving the set current value of each phase calculated by the first calculation module, obtaining the actual current value of each phase according to the current data of the acquisition module, calculating the difference value between the set current value of each phase and the actual current value of each phase, and determining the three-phase unbalance of the platform area according to the difference value to obtain the three-phase first unbalance;
the comparison module is used for comparing the three-phase first unbalance degree with a preset three-phase unbalance degree, judging whether the three-phase first unbalance degree is larger than the preset three-phase unbalance degree, outputting a phase-change first prompt message if the three-phase first unbalance degree is larger than the preset three-phase unbalance degree, transmitting the phase-change first prompt message to a controller, and outputting inspection information to the controller if the three-phase first prompt message is not equal to the preset three-phase unbalance degree;
the controller is configured to delay for a period of time after receiving the first prompt information for phase inversion, calculate a three-phase imbalance once through the second calculation module, obtain a three-phase second imbalance, perform unbalanced phase inversion operation if the three-phase second imbalance is still greater than a preset three-phase imbalance, until the three-phase second imbalance is lower than the preset three-phase imbalance, and perform line loss checking operation by gradually reducing samples of a phase inversion user after the three-phase second imbalance is lower than the preset three-phase imbalance; and after the controller receives the inspection information, performing line loss inspection operation by gradually reducing samples of the phase change user.
The intelligent sensing inspection system for the line loss of the transformer area specifically comprises the following steps: randomly selecting an electric energy meter corresponding to a first batch of users from the phase A, calculating the load power of the phase A of the selected electric energy meter, selecting an electric energy meter corresponding to a second batch of users from the phase B, enabling the load power of the electric energy meter corresponding to the second batch of users to be equal to the load power of the phase A, then carrying out phase change on the first batch of users and the second batch of users, after the phase change is completed, recalculating the three-phase imbalance after the phase change to obtain a three-phase third imbalance, and judging whether the three-phase third imbalance is higher than a preset three-phase imbalance or not;
if the three-phase third unbalance is higher than the preset three-phase unbalance, checking whether the load power of the first batch user and the second batch user changes, if the load power changes, selecting to set the first batch user and the second batch user to commutate back to the initial phase again, then calculating the three-phase fourth unbalance, judging whether the three-phase fourth unbalance is higher than the preset three-phase unbalance, if the three-phase fourth unbalance is higher than the preset three-phase unbalance, conducting unbalanced commutation operation, if the three-phase fourth unbalance is not higher than the preset three-phase unbalance, randomly extracting a first sub-batch user and a second sub-batch user from the first batch user and the second batch user, conducting the same commutation operation on the first sub-batch user and the second sub-batch user according to the commutation operation of the first batch user and the second batch user, determining whether the three-phase unbalance exists after the three-phase balance phase commutation exists, if the three-phase unbalance exists in the first sub-batch user and the second sub-batch user, then conducting unbalanced commutation operation on the first sub-batch user and the second sub-batch user, and gradually reducing the number of the first sub-batch user and the second sub-batch user until the number of the first sub-batch user and the second sub-batch user is reduced gradually; if the load power is unchanged, indicating that line loss is abnormal in the first batch user and the second batch user, after the first batch user and the second batch user are subjected to phase change, randomly extracting a first sub-batch user and a second sub-batch user from the first batch user and the second batch user, wherein the first sub-batch user and the second sub-batch user perform the same phase change operation according to the phase change operation of the first batch user and the second batch user and determine whether three-phase imbalance exists after the phase balance phase change before the phase change, if so, indicating that the line loss is abnormal in the first sub-batch user and the second sub-batch user, randomly extracting the first sub-batch user and the second sub-batch user from the first sub-batch user and the second sub-batch user, and gradually reducing the number of the batch users until the user with the abnormal line loss is found;
if the three-phase third unbalance is not higher than the preset three-phase unbalance, determining that no line loss abnormality exists in the first batch of users and the second batch of users, re-selecting one batch of users, and enabling the re-selected users to partially coincide with the first batch of users or the second batch of users.
The intelligent sensing inspection system for the line loss of the transformer area specifically comprises the following steps: randomly selecting an electric energy meter corresponding to a first batch of users from the phase A, calculating the load power of the phase A of the selected electric energy meter, selecting an electric energy meter corresponding to a third batch of users from the phase C, enabling the load power of the electric energy meter corresponding to the third batch of users to be equal to the load power of the phase A, then carrying out phase change on the first batch of users and the third batch of users, after the phase change is completed, recalculating the three-phase imbalance after the phase change to obtain a three-phase third imbalance, and judging whether the three-phase third imbalance is higher than a preset three-phase imbalance or not;
if the three-phase third unbalance is higher than the preset three-phase unbalance, checking whether the load work of the first batch user and the third batch user is changed, if the load work is changed, selecting to set the first batch user and the third batch user to commutate back to the initial phase again, then calculating the three-phase fourth unbalance, judging whether the three-phase fourth unbalance is higher than the preset three-phase unbalance, if the three-phase fourth unbalance is higher than the preset three-phase unbalance, conducting unbalanced commutation operation, if the three-phase fourth unbalance is not higher than the preset three-phase unbalance, randomly extracting a first sub-batch user and a third sub-batch user from the first batch user and the third batch user, conducting identical commutation operation on the first sub-batch user and the third sub-batch user according to the commutation operation of the first batch user and the third batch user, determining whether the three-phase unbalance exists after the three-phase balance commutation exists, if the three-phase unbalance exists in the first sub-batch user and the third sub-batch user, then conducting unbalanced commutation operation on the first sub-batch user and the third sub-batch user, gradually reducing the number of the first sub-batch user and the third sub-batch user until the number of the first sub-batch user and the third sub-batch user is reduced gradually; if the load power is unchanged, indicating that line loss is abnormal in the first batch user and the third batch user, after the first batch user and the third batch user are subjected to phase change, randomly extracting a first sub-batch user and a third sub-batch user from the first batch user and the third batch user, carrying out the same phase change operation on the first sub-batch user and the third sub-batch user according to the phase change operation of the first batch user and the third batch user, determining whether three-phase imbalance exists after the phase balance phase change before the phase change, if so, indicating that the line loss is abnormal in the first sub-batch user and the third sub-batch user, randomly extracting the first sub-batch user and the third sub-batch user from the first sub-batch user and the third sub-batch user, and gradually reducing the number of the batch users until the users with the abnormal line loss is found;
if the three-phase third unbalance is not higher than the preset three-phase unbalance, determining that no line loss abnormality exists in the first batch of users and the third batch of users, re-selecting one batch of users, and enabling the re-selected users to partially coincide with the first batch of users or the third batch of users.
The intelligent sensing inspection system for the line loss of the transformer area determines the three-phase unbalance degree of the transformer area through the difference value, and the obtaining of the three-phase first unbalance degree specifically comprises the following steps: and respectively calculating the difference values of the set current values and the actual current values of A, B, C to respectively obtain an A-phase current difference, a B-phase current difference and a C-phase current difference, comparing the magnitudes of the A-phase current difference, the B-phase current difference and the C-phase current difference, and dividing the maximum current difference among the A-phase current difference, the B-phase current difference and the C-phase current difference by the actual current value corresponding to the minimum current difference by the maximum current difference to obtain the three-phase first unbalance.
The power supply is used for supplying power to the phase change module, the comparison module or the sampling module.
As shown in fig. 2, a simplified flow chart of the intelligent sensing and checking system for the line loss of the transformer area of the present application is provided, and the method for checking the line loss of the transformer area by using the intelligent sensing and checking system for the line loss of the transformer area is as follows:
step 1: calculating a three-phase first unbalance degree;
step 2: comparing the three-phase first unbalance degree with a preset three-phase unbalance degree, judging whether the three-phase first unbalance degree is larger than the preset three-phase unbalance degree, outputting phase-change first prompt information if yes, conveying the phase-change first prompt information to a controller, and outputting inspection information to the controller if no;
after receiving the phase-change first prompt information, delaying for a period of time, calculating the three-phase unbalance degree once through the second calculation module to obtain a three-phase second unbalance degree, if the three-phase second unbalance degree is still larger than the preset three-phase unbalance degree, performing unbalanced phase-change operation until the three-phase second unbalance degree is lower than the preset three-phase unbalance degree, randomly selecting the electric energy meter corresponding to the first batch of users from the phase A when the three-phase second unbalance degree is lower than the preset three-phase unbalance degree, calculating the load work of the phase A of the selected electric energy meter, selecting the electric energy meter corresponding to the second/third batch of users from the phase B, enabling the load work of the electric energy meter corresponding to the second/third batch of users to be equal to the load work of the phase A, then carrying out phase change on the first batch of users and the second/third batch of users, calculating the three-phase unbalance degree after phase change again to obtain the three-phase third unbalance degree, and judging whether the three-phase third unbalance degree is higher than the preset three-phase unbalance degree or not;
if the third unbalance degree of the three phases is higher than the preset three-phase unbalance degree, checking whether the load work of the first batch user and the second/third batch user is changed, if the load work is changed, selecting to set the first batch user and the second/third batch user to commutate back to the initial phase, then calculating the fourth unbalance degree of the three phases, judging whether the fourth unbalance degree of the three phases is higher than the preset three-phase unbalance degree, if the fourth unbalance degree of the three phases is higher than the preset three-phase unbalance degree, performing unbalanced commutation operation, if the fourth unbalance degree of the three phases is not higher than the preset three-phase unbalance degree, randomly extracting a first sub-batch user and a second/third sub-batch user from the first batch user and the second/third batch user, performing the same commutation operation on the first sub-batch user and the second/third sub-batch user according to the commutation operation of the first batch user and determining whether the three-phase unbalance before commutation exists, if the three-phase unbalance after the three-phase unbalance exists, and if the three-phase unbalance operation is higher than the preset three-phase unbalance degree, then representing that the first sub-batch user and the second sub-batch user and the third sub-batch user exist, gradually and the abnormal line loss is gradually reduced from the first sub-batch user and the second sub-batch user to the third batch user; if the load power is unchanged, indicating that line loss abnormality exists in the first batch user and the second/third batch user, after the first batch user and the second/third batch user are subjected to phase change, randomly extracting a first sub-batch user and a second/third sub-batch user from the first batch user and the second/third batch user, performing the same phase change operation on the first sub-batch user and the second/third sub-batch user according to the phase change operation of the first batch user and the second/third batch user, determining whether three-phase imbalance exists after phase change and three-phase imbalance exists after phase change, if so, indicating that the line loss abnormality exists in the first sub-batch user and the second/third sub-batch user, and randomly extracting the first sub-batch user and the second/third sub-batch user from the first sub-batch user and the second/third sub-batch user, and gradually reducing the number of batch users until finding out the user with the line loss abnormality;
if the three-phase third unbalance is not higher than the preset three-phase unbalance, determining that no line loss abnormality exists in the first batch of users and the second batch of users, and re-selecting one batch of users, wherein the re-selected users can partially coincide with the first batch of users or the second batch of users;
step 3: after the controller receives the inspection information, randomly selecting an electric energy meter corresponding to a first batch of users from the phase A, calculating the load work of the phase A of the selected electric energy meter, selecting an electric energy meter corresponding to a second/third batch of users from the phase B/C so that the load work of the electric energy meter corresponding to the second/third batch of users is equal to the load work of the phase A, then converting the first batch of users and the second/third batch of users, and after the conversion is completed, recalculating the three-phase imbalance after the conversion to obtain a three-phase third imbalance, and judging whether the three-phase third imbalance is higher than a preset three-phase imbalance;
if the third unbalance degree of the three phases is higher than the preset three-phase unbalance degree, checking whether the load work of the first batch user and the second/third batch user is changed, if the load work is changed, selecting to set the first batch user and the second/third batch user to commutate back to the initial phase, then calculating the fourth unbalance degree of the three phases, judging whether the fourth unbalance degree of the three phases is higher than the preset three-phase unbalance degree, if the fourth unbalance degree of the three phases is higher than the preset three-phase unbalance degree, performing unbalanced commutation operation, if the fourth unbalance degree of the three phases is not higher than the preset three-phase unbalance degree, randomly extracting a first sub-batch user and a second/third sub-batch user from the first batch user and the second/third batch user, performing the same commutation operation on the first sub-batch user and the second/third sub-batch user according to the commutation operation of the first batch user and determining whether the three-phase unbalance before commutation exists, if the three-phase unbalance after the three-phase unbalance exists, and if the three-phase unbalance operation is higher than the preset three-phase unbalance degree, then representing that the first sub-batch user and the second sub-batch user and the third sub-batch user exist, gradually and the abnormal line loss is gradually reduced from the first sub-batch user and the second sub-batch user to the third batch user; if the load power is unchanged, indicating that line loss abnormality exists in the first batch user and the second/third batch user, after the first batch user and the second/third batch user are subjected to phase change, randomly extracting a first sub-batch user and a second/third sub-batch user from the first batch user and the second/third batch user, performing the same phase change operation on the first sub-batch user and the second/third sub-batch user according to the phase change operation of the first batch user and the second/third batch user, determining whether three-phase imbalance exists after phase change and three-phase imbalance exists after phase change, if so, indicating that the line loss abnormality exists in the first sub-batch user and the second/third sub-batch user, and randomly extracting the first sub-batch user and the second/third sub-batch user from the first sub-batch user and the second/third sub-batch user, and gradually reducing the number of batch users until finding out the user with the line loss abnormality;
if the three-phase third unbalance is not higher than the preset three-phase unbalance, determining that no line loss abnormality exists in the first batch of users and the second batch of users, re-selecting one batch of users, and enabling the re-selected users to partially coincide with the first batch of users or the second batch of users.
According to the application, the balance degree calculation of each phase is firstly carried out, the phases are in a balance state through phase change operation, preferably, the three phases are in ideal balance degree, certain deviation can also occur, as long as the three phases are below a preset imbalance degree threshold, the imbalance degree threshold can be set by a person skilled in the art according to the prior art, users of each phase are in a stable power supply state under the balance state of the three phases, the selected batch of users are subjected to equal phase change, the three phases are in the balance state theoretically after the phase change, and because the selected batch of users are subjected to the phase change, the users which do not pass through the electric energy meter can not perform synchronous phase change together with the phase change operation of the electric energy meter, thus, the unbalance of the three phases occurs in the users after the phase change, the line loss caused by the abnormal electricity of the users can be determined, then, the number of samples is primarily reduced in the selected batch of users, the corresponding phase change operation is carried out once every time, the three-phase unbalance occurs, the three-phase unbalance continues to be reduced, the users are indicated that the users do not have the abnormal electricity consumption of the samples, and the abnormal samples are not found by the abnormal electricity samples after the phase change, the users are not lost, and the abnormal samples are found by the abnormal users.
In the prior art, the user sample is not selected to perform phase change under the three-phase balance state, the three-phase unbalance is judged through the phase change to find the line loss of the abnormal power consumption, the phase change operation is only performed under the three-phase unbalance in the prior art, the phase change operation is not performed under the three-phase balance state, and the abnormal search of the user power consumption is not performed through the phase change operation.
The application provides an intelligent sensing inspection system for line loss of a transformer area, which performs unbalanced phase change operation firstly when unbalance occurs until the three-phase second unbalance is lower than a preset three-phase unbalance, and performs line loss inspection operation by gradually shrinking samples of a phase change user after the three-phase second unbalance is lower than the preset three-phase unbalance; after the controller receives the inspection information, performing line loss inspection operation by gradually reducing samples of a commutation user, wherein the method is used for calculating unbalance degree by setting a difference value between a current value and an actual current value; the application is further improved in that the problem of three-phase unbalance is determined by selecting batch users of each phase to perform phase change operation, samples of batch users are gradually reduced according to the problem of three-phase unbalance, and the samples are gradually approximated to users with abnormal electricity consumption, and the first unbalance degree, the second unbalance degree, the third unbalance degree and the fourth unbalance degree of the three phases are sequentially compared and judged, so that intelligent abnormal user check is realized, intelligent checking of line loss of a station area is realized, and the intellectualization of the electric network check is improved. According to the application, the user sample is selected to perform phase change in the three-phase balance state, and the three-phase unbalance is judged through the phase change to find the line loss of the abnormal power consumption.
Claims (3)
1. The intelligent sensing inspection system for the line loss of the transformer area is characterized by comprising an acquisition module, a first calculation module, a second calculation module, a comparison module, a controller and a power supply;
the collecting module is used for collecting voltage data, current data and total work of load in a first set time period of the user electric energy meter in the transformer area;
the first calculation module is used for determining the average work of each phase in the first set time period through the total work, obtaining the set current value of each phase through dividing the average work by the product of the voltage value of each phase and the first set time period,
the second calculation module is used for receiving the set current value of each phase calculated by the first calculation module, obtaining the actual current value of each phase according to the current data of the acquisition module, calculating the difference value between the set current value of each phase and the actual current value of each phase, and determining the three-phase unbalance of the platform area according to the difference value to obtain the three-phase first unbalance;
the comparison module is used for comparing the three-phase first unbalance degree with a preset three-phase unbalance degree, judging whether the three-phase first unbalance degree is larger than the preset three-phase unbalance degree, outputting a phase-change first prompt message if the three-phase first unbalance degree is larger than the preset three-phase unbalance degree, transmitting the phase-change first prompt message to a controller, and outputting inspection information to the controller if the three-phase first prompt message is not equal to the preset three-phase unbalance degree;
the controller is configured to delay for a period of time after receiving the first prompt information for phase inversion, calculate a three-phase imbalance once through the second calculation module, obtain a three-phase second imbalance, perform unbalanced phase inversion operation if the three-phase second imbalance is still greater than a preset three-phase imbalance, until the three-phase second imbalance is lower than the preset three-phase imbalance, and perform line loss checking operation by gradually reducing samples of a phase inversion user after the three-phase second imbalance is lower than the preset three-phase imbalance; after the controller receives the inspection information, performing line loss inspection operation by gradually reducing samples of the commutation user; the line loss inspection operation comprises the following steps: randomly selecting an electric energy meter corresponding to a first batch of users from the phase A, calculating the load power of the phase A of the selected electric energy meter, selecting an electric energy meter corresponding to a second batch of users from the phase B, enabling the load power of the electric energy meter corresponding to the second batch of users to be equal to the load power of the phase A, then carrying out phase change on the first batch of users and the second batch of users, after the phase change is completed, recalculating the three-phase imbalance after the phase change to obtain a three-phase third imbalance, and judging whether the three-phase third imbalance is higher than a preset three-phase imbalance or not;
if the three-phase third unbalance is higher than the preset three-phase unbalance, checking whether the load power of the first batch user and the second batch user changes, if the load power changes, selecting to set the first batch user and the second batch user to commutate back to the initial phase again, then calculating the three-phase fourth unbalance, judging whether the three-phase fourth unbalance is higher than the preset three-phase unbalance, if the three-phase fourth unbalance is higher than the preset three-phase unbalance, conducting unbalanced commutation operation, if the three-phase fourth unbalance is not higher than the preset three-phase unbalance, randomly extracting a first sub-batch user and a second sub-batch user from the first batch user and the second batch user, conducting the same commutation operation on the first sub-batch user and the second sub-batch user according to the commutation operation of the first batch user and the second batch user, determining whether the three-phase unbalance exists after the three-phase balance phase commutation exists, if the three-phase unbalance exists in the first sub-batch user and the second sub-batch user, then conducting unbalanced commutation operation on the first sub-batch user and the second sub-batch user, and gradually reducing the number of the first sub-batch user and the second sub-batch user until the number of the first sub-batch user and the second sub-batch user is reduced gradually; if the load power is unchanged, indicating that line loss is abnormal in the first batch user and the second batch user, after the first batch user and the second batch user are subjected to phase change, randomly extracting a first sub-batch user and a second sub-batch user from the first batch user and the second batch user, wherein the first sub-batch user and the second sub-batch user perform the same phase change operation according to the phase change operation of the first batch user and the second batch user and determine whether three-phase imbalance exists after the phase balance phase change before the phase change, if so, indicating that the line loss is abnormal in the first sub-batch user and the second sub-batch user, randomly extracting the first sub-batch user and the second sub-batch user from the first sub-batch user and the second sub-batch user, and gradually reducing the number of the batch users until the user with the abnormal line loss is found;
if the three-phase third unbalance is not higher than the preset three-phase unbalance, determining that no line loss abnormality exists in the first batch of users and the second batch of users, and re-selecting one batch of users, wherein the re-selected users can partially coincide with the first batch of users or the second batch of users; the line loss inspection operation comprises the following steps: randomly selecting an electric energy meter corresponding to a first batch of users from the phase A, calculating the load power of the phase A of the selected electric energy meter, selecting an electric energy meter corresponding to a third batch of users from the phase C, enabling the load power of the electric energy meter corresponding to the third batch of users to be equal to the load power of the phase A, then carrying out phase change on the first batch of users and the third batch of users, after the phase change is completed, recalculating the three-phase imbalance after the phase change to obtain a three-phase third imbalance, and judging whether the three-phase third imbalance is higher than a preset three-phase imbalance or not;
if the three-phase third unbalance is higher than the preset three-phase unbalance, checking whether the load work of the first batch user and the third batch user is changed, if the load work is changed, selecting to set the first batch user and the third batch user to commutate back to the initial phase again, then calculating the three-phase fourth unbalance, judging whether the three-phase fourth unbalance is higher than the preset three-phase unbalance, if the three-phase fourth unbalance is higher than the preset three-phase unbalance, conducting unbalanced commutation operation, if the three-phase fourth unbalance is not higher than the preset three-phase unbalance, randomly extracting a first sub-batch user and a third sub-batch user from the first batch user and the third batch user, conducting identical commutation operation on the first sub-batch user and the third sub-batch user according to the commutation operation of the first batch user and the third batch user, determining whether the three-phase unbalance exists after the three-phase balance commutation exists, if the three-phase unbalance exists in the first sub-batch user and the third sub-batch user, then conducting unbalanced commutation operation on the first sub-batch user and the third sub-batch user, gradually reducing the number of the first sub-batch user and the third sub-batch user until the number of the first sub-batch user and the third sub-batch user is reduced gradually; if the load power is unchanged, indicating that line loss is abnormal in the first batch user and the third batch user, after the first batch user and the third batch user are subjected to phase change, randomly extracting a first sub-batch user and a third sub-batch user from the first batch user and the third batch user, carrying out the same phase change operation on the first sub-batch user and the third sub-batch user according to the phase change operation of the first batch user and the third batch user, determining whether three-phase imbalance exists after the phase balance phase change before the phase change, if so, indicating that the line loss is abnormal in the first sub-batch user and the third sub-batch user, randomly extracting the first sub-batch user and the third sub-batch user from the first sub-batch user and the third sub-batch user, and gradually reducing the number of the batch users until the users with the abnormal line loss is found;
if the three-phase third unbalance is not higher than the preset three-phase unbalance, determining that no line loss abnormality exists in the first batch of users and the third batch of users, re-selecting one batch of users, and enabling the re-selected users to partially coincide with the first batch of users or the third batch of users.
2. The intelligent sensing and checking system for line loss of a transformer area according to claim 1, wherein the determining the three-phase imbalance of the transformer area by the difference value, the obtaining the three-phase first imbalance specifically includes: and respectively calculating the difference values of the set current values and the actual current values of A, B, C to respectively obtain an A-phase current difference, a B-phase current difference and a C-phase current difference, comparing the magnitudes of the A-phase current difference, the B-phase current difference and the C-phase current difference, and dividing the maximum current difference among the A-phase current difference, the B-phase current difference and the C-phase current difference by the actual current value corresponding to the minimum current difference by the maximum current difference to obtain the three-phase first unbalance.
3. The intelligent perception auditing system for transformer area line loss according to claim 1, wherein the power supply is used for supplying power to a phase-change module, a comparison module or a sampling module.
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