CN115267323B - Line loss analysis management system - Google Patents
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- CN115267323B CN115267323B CN202210918433.XA CN202210918433A CN115267323B CN 115267323 B CN115267323 B CN 115267323B CN 202210918433 A CN202210918433 A CN 202210918433A CN 115267323 B CN115267323 B CN 115267323B
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- 238000000034 method Methods 0.000 claims abstract description 20
- 238000000556 factor analysis Methods 0.000 claims description 21
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- 238000010248 power generation Methods 0.000 claims description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
- G01R22/066—Arrangements for avoiding or indicating fraudulent use
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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]
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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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- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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Abstract
The invention discloses a line loss analysis management system, which at least comprises: the system comprises a user ammeter, a station area summary table, a station area branch summary table, an electricity consumption information acquisition module and an analysis module; the power consumption information acquisition module is used for acquiring power consumption information of the user electricity meter, the total table of the station area and the branch table of the station area, and calculating to obtain the total line loss rate of the station area and the line loss rate of each key branch according to the power consumption information; the analysis module is used for comparing the line loss rate obtained by the electricity consumption information acquisition module with a standard, judging high-loss station branch and negative-loss line loss branch, and executing corresponding analysis strategies on the high-loss station branch and the negative-loss station branch; the method and the device can accurately judge the area where the line loss abnormal problem occurs, reduce the investigation range, improve the efficiency and accuracy of problem determination and solution, and improve the efficiency of problem determination in a targeted analysis mode.
Description
Technical Field
The invention relates to the technical field of line loss analysis, in particular to a line loss analysis management system.
Background
The line loss generated in the power system is a more difficult-to-control project, the line loss is also called line loss, the line loss is energy loss generated by electric energy transmitted through a power transmission line, the line loss quantity not only affects the revenue condition of a power company, but also is related to the safe and stable operation of a power grid, so that the line loss needs to be analyzed regularly, timely overhauling is carried out on a line with abnormal line loss, and the abnormal line loss is eliminated timely and effectively.
The line loss analysis generally adopts a metering data statistics mode to judge the line loss condition in the station area, the line loss condition can be determined by collecting the table area total table and the related parameters of the user ammeter, the power data of the electric energy meter can be timely collected through the intelligent ammeter, the data of the user ammeter can be timely received through the communication connection of the server and the intelligent ammeter, the problem of abnormal line loss comprises high loss and low loss, the reasons for high loss are caused by management factors or technical factors, such as the problems of overhigh loss caused by power stealing leakage, account of standing parameter collection errors, three-phase imbalance and the like, when the high loss problem occurs in the station area through line loss analysis, the timely and accurate judgment on the high loss concrete reasons is needed, the economic loss caused by a power supply company is further reduced, the reasons for low loss are often that the large deviation occurs between the table area total table or the power obtained by the branch total table power and the actual electric energy parameters, the low loss occurs, the accurate acquisition of the total table area and the accurate line loss analysis on the line loss can be affected by the power company, the problem of high loss is also needed, and the line loss is accurately obtained by the table area, the line loss is accurately detected by the line loss is more effectively, and the line loss is more difficult to be found out in the complex areas due to the fact that the line loss is more complicated and the line loss is detected by the existing line loss analysis is greatly.
Disclosure of Invention
The invention aims to provide a line loss analysis management system which solves the following technical problems:
how to provide a management system which can assist electric personnel to rapidly and accurately judge the reasons of line loss abnormality.
The aim of the invention can be achieved by the following technical scheme:
a line loss analysis management system, the system comprising at least:
the system comprises a user ammeter, a station area summary table, a station area branch summary table, an electricity consumption information acquisition module and an analysis module;
the electricity consumption information acquisition module is used for acquiring electricity consumption information of the user electricity meter, the total table of the station area and the branch table of the station area, and calculating and obtaining the total line loss rate of the station area and the line loss rate of each key branch according to the electricity consumption information;
the analysis module is used for comparing the line loss rate obtained by the electricity consumption information acquisition module with a standard, judging high-loss branch and negative-loss branch, and executing corresponding analysis strategies for the high-loss branch and the negative-loss branch.
In one embodiment, the step of operating the analysis module includes:
the total line loss rate L of the station area Total (S) And standard interval [ L 1 ，L 2 ]And (3) comparison:
if the total line loss rate L of the station area Total (S) ∈[L 1 ，L 2 ]Judging that the line loss of the station area is normal;
otherwise, the line loss rate L of each key branch of the platform region is respectively calculated Dividing into And standard interval [ L 1 ，L 2 ]And (3) comparison:
if L Dividing into ∈[L 1 ，L 2 ]The critical branch is not treated;
if L Dividing into ∈(-∞，L 1 ) Executing a first management factor analysis strategy on the key branch;
if L Dividing into ∈(L 2 , + -infinity a) of the above-mentioned components, then a second management factor analysis strategy and a technical factor analysis strategy are sequentially executed on the key branch.
In one embodiment, the first management factor analysis policy includes:
acquiring an electricity consumption real-time load curve graph of a station area branch table through an electricity consumption information acquisition module;
judging whether various real-time voltage and current data are abnormal or not:
if abnormal data exist, treating the abnormal data item;
otherwise, the table branch table is checked in the field.
In one embodiment, the second management factor analysis policy includes:
s1, checking the electric quantity collection success rate of the key branch user through an electricity consumption information collection module:
if the electricity collection success rate of the user is 100%, step S2 is carried out;
otherwise, re-collecting the ammeter with failed collection;
s2, checking abnormal phenomena of electricity stealing and ammeter:
if the electricity stealing phenomenon exists, carrying out electricity stealing treatment;
if the abnormal phenomenon of the ammeter exists, performing ammeter management;
if no electricity stealing and meter abnormality exists, step S3 is carried out;
s3, obtaining whether photovoltaic access exists in the key branch through power grid information:
if the photovoltaic access exists, carrying out photovoltaic access influence analysis;
otherwise, executing a technical factor analysis strategy.
In one embodiment, the technical factor analysis strategy comprises:
SS1, acquiring current information of a branch total table through an electricity consumption information acquisition module, carrying out three-phase balance analysis on the key branch according to the current information, and comparing an analysis result with a corresponding standard range:
if the maximum value of the three-phase current unbalance is within the standard range, performing step SS2;
otherwise, carrying out three-phase balance treatment;
SS2, end power user power analysis:
if the line loss is judged to be caused by the terminal power user, the terminal power user treatment is carried out;
otherwise, the fault factors are checked according to the historical line loss rate.
Further, the three-phase balance treatment process comprises the following steps:
performing nuclear phase drawing on the platform region to obtain a platform region topological graph;
leading the topological graph of the transformer area and electricity consumption data into a theoretical computing system to obtain a phase modulation scheme;
and finishing three-phase balance management according to a phase modulation scheme.
In one embodiment, the end-user analysis process is:
terminal power user A for checking branches of each station 1 、A 2 、…A n N represents the total terminal power user number;
acquiring historical line loss rate data in a specific period before the station area and power consumption data of each terminal power user;
if the line loss rate meets the requirement A i When not working and the line loss rate is not in accordance with the requirement A i Work, judge A i Affecting the line loss rate of the station area, and treating the terminal power user, wherein i is [1, n ]]；
Otherwise, the terminal power user is checked in the field.
Further, the process of the end power user governance is as follows:
calculating reactive compensation quantity according to historical average electricity consumption in a specific period of a power user;
and installing corresponding reactive compensation equipment according to the calculated reactive compensation quantity.
Further, the photovoltaic access influence analysis process comprises the following steps:
acquiring historical generating capacity information in a specific period before a photovoltaic power station;
acquiring line loss rate information in a specific period before the key branch;
judging whether the photovoltaic power generation amount and the line loss rate are positively correlated or not:
if positive correlation is adopted, judging that the photovoltaic access mode is unreasonable, and treating the photovoltaic access mode;
otherwise, the photovoltaic access mode is judged to be reasonable.
In one embodiment, the electricity theft verification process comprises:
respectively acquiring line loss qualified electricity consumption data and line loss deviation electricity consumption data of a user in a specific period;
the average electricity consumption E of each user when the line loss is qualified is respectively obtained n Average electricity consumption E in case of line loss deviation u And pass through the formulaCalculating the deviation rate d, and comparing the deviation rate d with a threshold d th And (3) performing comparison:
if d is greater than or equal to d th Judging the user as a suspicious user;
if d < d th Judging the user as a normal user;
and carrying out system data transparent reading on the users with the suspected fraudulent use and carrying out on-site investigation and confirmation. The invention has the beneficial effects that:
(1) According to the method, the platform area is divided into a plurality of analysis areas through the total data of the subareas, and independent line loss calculation is carried out for each area, so that the area causing the problem of abnormal line loss can be accurately judged, the power operation and maintenance personnel is helped to reduce the investigation range, and the efficiency and accuracy of problem determination and solution are improved; meanwhile, the system can improve the efficiency of problem determination by a targeted analysis mode, and further can assist power operation and maintenance personnel to rapidly solve the problem of abnormal line loss.
(2) After the negative loss problem is determined, the real-time voltage and current are automatically analyzed by acquiring the electricity real-time load curve graph of the branch summary table, so that whether the ammeter is abnormal or not can be primarily judged, and then the investigation is carried out in the field, the accuracy and pertinence of the investigation can be effectively improved, and further, the electric power operation and maintenance personnel can be assisted to improve the negative loss problem investigation and solving efficiency.
(3) According to the invention, the analysis of the line loss management factors is sequentially carried out according to the frequency of occurrence of the problems, the difficulty and the severity of problem investigation, so that the efficiency of high-loss analysis is improved.
(4) According to the invention, through the analysis and comparison of the terminal power user information and the line loss rate historical information, the influence of the terminal power user on high loss can be judged in a preliminary way, and the investigation range of the terminal user is further reduced.
(5) According to the invention, through analysis of the photovoltaic power generation amount and the line loss rate, whether the photovoltaic access affects the line loss rate can be judged, so that the high-loss problem can be judged more conveniently and accurately.
(6) The invention can remotely and primarily confirm the electricity stealing risk user of the user, and when the on-site investigation and confirmation are further carried out, the investigation range of the electricity stealing user can be greatly reduced by carrying out system data transparent reading on the electricity stealing suspicious user, so that the workload of electric power operation and maintenance personnel is effectively reduced.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a logic block diagram of the line loss analysis management system of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, in an embodiment, a line loss analysis management system is provided to assist an electric staff in analyzing and judging an accurate cause of a line loss abnormality, specifically, the system collects electricity consumption information of a user electricity meter, a table area total table and a table area branch total table through an electricity consumption information collection module, and calculates and obtains a total line loss rate of the table area and line loss rates of all key branches according to the electricity consumption information, the process can calculate a line loss rate= (Σinput electric quantity- Σ output electric quantity) Σ input electric quantity by 100% according to a calculation method of the line loss rate, a result calculated by the formula is a statistical line loss rate, the system is suitable for calculating the total line loss rate and the branch total table, specifically, the calculation of the branch total table line loss is that the total electricity consumption of the user electricity meter is taken as output electric quantity, the branch total table is taken as input electric quantity, the branch total table is obtained through calculation, the total table area total table electricity loss rate is taken as output electric quantity, the table area total table is taken as the total table area electric quantity, the line loss rate is calculated, the line loss rate of the table area is taken as the input electric quantity, the table area total table area is calculated, the total table area is taken as the total table area electricity loss, the total table area is calculated, the total table area is taken as the input electric quantity, the total table area is calculated and the total table area electricity consumption is taken as the output table area, the total table electricity meter, the electricity loss, the area is and the area is calculated area, and the area is different, and can be calculated and has different areas.
Meanwhile, the system further analyzes the line loss rate obtained by the electricity consumption information acquisition module through the analysis module, specifically, the analysis module compares the calculated line loss rate with a standard to judge whether the line loss of the branch of the station area is normal, high loss or negative loss, and meanwhile, the analysis module can adopt different analysis strategies to determine the problems aiming at the problems of high loss and negative loss.
As an implementation manner of the present invention, the steps of the operation of the analysis module in this embodiment include: the total line loss rate L of the station area Total (S) And standard interval [ L 1 ，L 2 ]And (3) comparison: if the total line loss rate L of the station area Total (S) ∈[L 1 ，L 2 ]If the bus loss rate of the station area is normal, judging that the line loss of the station area is normal; when the bus loss rate is highWhen the bus loss rate of the station is abnormal, the line loss rate L of each key branch of the station is respectively calculated Dividing into And standard interval [ L 1 ，L 2 ]And (3) comparison: if L Dividing into ∈[L 1 ，L 2 ]The normal line loss rate of the branch is indicated, so that the critical branch is not treated; if L Dividing into ∈(-∞，L 1 ) Explaining that the critical branch is negative, aiming at the reason of causing the negative loss, the embodiment formulates a corresponding first management factor analysis strategy to perform corresponding analysis on the critical branch, if L Dividing into ∈(L 2 , +++) to indicate that the critical branch is high loss, a second management factor analysis strategy and a technical factor analysis strategy are sequentially executed on the critical branch, in particular, since the reasons for high loss include management factors and technical factors, compared with the determination and processing of the technical factors, the method has the advantages that the management factors are easier to check and solve, so that the management factors are checked and solved preferentially, and when the check is free of problems, the technical factors are further analyzed and solved, so that the efficiency of checking and solving the problems can be improved.
In the theoretical analysis, there is a situation where both the critical branch loss and the negative loss are normal, but the probability of actually occurring such a phenomenon is extremely low, and therefore, it is not considered that whether or not the line loss is normal can be determined by calculating the branch line loss.
Further, the first management factor analysis strategy for the low loss problem includes: acquiring an electricity consumption real-time load curve graph of a station area branch table through an electricity consumption information acquisition module; judging whether various real-time voltage and current data are abnormal or not: if abnormal data exist, treating the abnormal data item; otherwise, the branch table of the station is subjected to field investigation, when the negative loss problem is analyzed, the abnormality of the ammeter is usually reflected in the electric power data of the branch table, in one example, the line loss rate of the station is negative due to the C-phase voltage loss, and further investigation and judgment are carried out, and the negative loss cause is judged to be caused by the fact that the C-phase voltage sheet is not contacted with a screw, so after the negative loss problem is determined, the real-time voltage and current are automatically analyzed by acquiring the electricity real-time load curve graph of the branch table, and then whether the ammeter is abnormal or not is primarily judged, and then the field investigation is carried out, so that the investigation accuracy and pertinence can be effectively improved, and further the electric power operation staff are assisted to improve the investigation and the solution efficiency of the negative loss problem.
Further, when the high-loss problem occurs, firstly, the management factors are examined, and specifically, the second management factor analysis strategy in this embodiment includes: s1, checking the electric quantity collection success rate of the key branch user through an electricity consumption information collection module: if the electricity collection success rate of the user is 100%, step S2 is carried out; otherwise, re-collecting the ammeter with failed collection; when the high-loss problem occurs in the line loss, the system firstly determines the power acquisition success rate of the user, and in the state that part of user variables are not successfully acquired, the obtained line loss rate is larger, so that calculation deviation is caused, and errors caused by calculation of the line loss due to data statistics problems can be avoided by determining the acquisition success rate; when the acquisition success rate is 100%, step S2 is performed to check the abnormal phenomenon of electricity stealing and ammeter: if the electricity stealing phenomenon exists, carrying out electricity stealing treatment; if the abnormal phenomenon of the ammeter exists, performing ammeter management; if no electricity stealing and meter abnormality exists, step S3 is carried out; through confirming and checking the electricity stealing factors, the influence of the electricity stealing factors on high damage can be avoided or eliminated, meanwhile, the problem of high damage can be caused by irrational photovoltaic access modes in the transformer area, and photovoltaic access exists in power grid information, so that step S3 obtains whether the photovoltaic access exists in the key branch through the power grid information: if the photovoltaic access exists, carrying out photovoltaic access influence analysis, and judging the rationality of the photovoltaic access; if the photovoltaic access does not exist, the high-loss problem is indicated to come from the technical factor, so that the technical factor analysis strategy is executed, and therefore, the embodiment sequentially analyzes the line loss management factors according to the frequency of occurrence of the problem, the difficulty and the severity of problem investigation, and further improves the efficiency of the high-loss analysis.
Further, technical reasons for high loss mainly include three-phase imbalance and electric conductance for end power users, so the technical factor analysis strategy includes: step SS1, acquiring current information of a branch total table through an electricity consumption information acquisition module, carrying out three-phase balance analysis on the key branch according to the current information, and comparing an analysis result with a corresponding standard range, specifically, judging the maximum value of three-phase current unbalance through the acquired current history phenomena of the phase A, the phase B and the phase C, if the maximum value of the three-phase current unbalance is in the standard range, indicating that the key branch is balanced in three phases, carrying out further analysis in step SS3, otherwise, indicating that the high loss of the key branch is caused by three-phase unbalance, and carrying out treatment on the three-phase balance; step SS2 is analysis of electricity consumption of the terminal power user, specifically, judging whether high loss is caused by the terminal power user or not according to the electricity consumption data of the terminal power user, and if so, carrying out terminal power user treatment; otherwise, according to the troubleshooting of the historical line loss rate fault factors, the three-phase balance and the influence of the terminal power user are judged in sequence, so that the high loss caused by the technical factors can be accurately troubleshooted, and further, the accurate and efficient determination and the problem solving of the power operation and maintenance personnel are assisted.
As an implementation mode of the invention, the embodiment provides a three-phase balance management mode, which comprises the following steps: the method comprises the steps of carrying out nuclear phase drawing on a platform region to obtain a platform region topological graph, and importing the platform region topological graph and electricity consumption data into a theoretical calculation system to further obtain a phase modulation scheme, wherein the theoretical calculation system can be completed by adopting existing large-scale software, so that phase modulation operation is carried out on a user with unbalanced three phases according to an optimized phase modulation scheme output by analysis software, further, the problem of unbalanced three phases can be effectively treated, and further line loss is reduced.
As one embodiment of the present invention, the process of end-user analysis is: firstly, checking terminal power user A of key branches of each area according to power grid information 1 、A 2 、…A n N represents the total terminal power user number, the terminal power users are analyzed, specifically, the historical line loss rate data in a specific period before the station area and the power consumption data of each terminal power user are obtained, if the line loss rate meets the requirement, A i When not working and the line loss rate is not in accordance with the requirement A i Work indicates that the electricity consumption of the terminal power user affects the line loss, thus judging A i Affecting the line loss rate of the station area, and treating the terminal power user, wherein i is [1, n ]]The method comprises the steps of carrying out a first treatment on the surface of the Otherwise, carrying out field check on the terminal power user; judging whether the power consumption of the terminal power user affects the line loss or not according to the actual condition; therefore, the embodiment can preliminarily judge through the analysis and comparison of the terminal power user information and the line loss rate historical informationThe influence of the terminal power user on high loss is further reduced, the investigation range of the terminal user is further shortened, and the investigation efficiency is improved.
The end power user refers to an industrial power user.
Further, the process of end power user governance is: and calculating reactive compensation quantity according to the historical average electricity consumption in a specific period of the power user, installing corresponding reactive compensation equipment according to the calculated reactive compensation quantity, and reducing high loss caused by electricity consumption of the end user by carrying out reactive compensation of corresponding size on the end user.
As an implementation manner of the present invention, the process of photovoltaic access influence analysis in this embodiment is: firstly, historical generating capacity information in a specific period before a photovoltaic power station is obtained, meanwhile, line loss rate information in the specific period before the key branch is obtained, then whether the photovoltaic generating capacity and the line loss rate are positively correlated or not is judged, obviously, when the photovoltaic generating capacity and the line loss rate are positively correlated, the fact that the photovoltaic generating capacity is connected influences the line loss rate of a station area is indicated, therefore, the photovoltaic connecting mode is unreasonable, the photovoltaic connecting mode needs to be treated, if the photovoltaic generating capacity and the line loss rate are not positively correlated, the fact that the photovoltaic connecting mode is not influenced is indicated, therefore, the photovoltaic connecting mode is reasonable is judged, specifically, the positive correlation judgment can be carried out in the same time interval, the generating capacity-line loss rate coordinate is established, whether the positive correlation is carried out or not is judged according to the change trend of a drawing graph, and therefore, whether the photovoltaic connecting mode influences the line loss rate or not can be judged through analysis of the photovoltaic generating capacity and the line loss rate, and further the high loss problem can be more conveniently and accurately judged.
As one embodiment of the invention, the electricity stealing mode comprises the electricity stealing by bypassing the metering device, changing or destroying the electricity stealing by the metering device, wherein the electricity stealing by changing or destroying the metering device can be judged according to the data transmitted by the ammeter, and the remote analysis of the electricity stealing by bypassing the metering device is more difficult, therefore, the electricity stealing checking process in the embodiment firstly obtains the line loss qualified electricity consumption data and the line loss deviation electricity consumption data of the user in a specific period respectively, and obtains the line loss qualified time of each user respectivelyAverage electricity consumption E of (2) n Average electricity consumption E in case of line loss deviation u And pass through the formulaCalculating the deviation rate d, and comparing the deviation rate d with a threshold d th Comparing, it is obvious that when d is greater than or equal to d th When the power consumption of the user is greater than that of the user in the high-loss area, the user is judged to be in doubt of stealing electricity, and when d is less than d th When the power consumption information of the user is used, the user can remotely and primarily confirm the power stealing risk user of the user, and when the on-site investigation and confirmation are further carried out, the system data transmission reading is carried out on the power stealing suspicious user, so that the investigation range of the power stealing user can be greatly reduced, the workload of power operation and maintenance personnel is effectively reduced, and meanwhile, the problem investigation efficiency is also improved.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (6)
1. A line loss analysis management system, the system comprising at least:
the system comprises a user ammeter, a station area summary table, a station area branch summary table, an electricity consumption information acquisition module and an analysis module;
the electricity consumption information acquisition module is used for acquiring electricity consumption information of the user electricity meter, the total table of the station area and the branch table of the station area, and calculating and obtaining the total line loss rate of the station area and the line loss rate of each key branch according to the electricity consumption information;
the analysis module is used for comparing the line loss rate obtained by the electricity consumption information acquisition module with a standard, judging high-loss station branch and negative-loss line loss branch, and executing corresponding analysis strategies for the high-loss station branch and the negative-loss station branch;
the steps of the analysis module work include:
the total line loss rate L of the station area Total (S) And standard interval [ L 1 ，L 2 ]And (3) comparison:
if the total line loss rate L of the station area Total (S) ∈[L 1 ，L 2 ]Judging that the line loss of the station area is normal;
otherwise, the line loss rate L of each key branch of the platform region is respectively calculated Dividing into And standard interval [ L 1 ，L 2 ]And (3) comparison:
if L Dividing into ∈[L 1 ，L 2 ]The critical branch is not treated;
if L Dividing into ∈(-∞，L 1 ) Executing a first management factor analysis strategy on the key branch;
if L Dividing into ∈(L 2 , + -infinity a) of the above-mentioned components, sequentially executing a second management factor analysis strategy and a technical factor analysis strategy on the key branch;
the first management factor analysis strategy comprises:
acquiring an electricity consumption real-time load curve graph of a station area branch table through an electricity consumption information acquisition module;
judging whether various real-time voltage and current data are abnormal or not:
if abnormal data exist, treating the abnormal data item;
otherwise, the table area branch table is subjected to field investigation;
the second management factor analysis strategy includes:
s1, checking the electric quantity collection success rate of the key branch user through an electricity consumption information collection module:
if the electricity collection success rate of the user is 100%, step S2 is carried out;
otherwise, re-collecting the ammeter with failed collection;
s2, checking abnormal phenomena of electricity stealing and ammeter:
if the electricity stealing phenomenon exists, carrying out electricity stealing treatment;
if the abnormal phenomenon of the ammeter exists, performing ammeter management;
if no electricity stealing and meter abnormality exists, step S3 is carried out;
s3, obtaining whether photovoltaic access exists in the key branch through power grid information:
if the photovoltaic access exists, carrying out photovoltaic access influence analysis;
otherwise, executing a technical factor analysis strategy;
the technical factor analysis strategy comprises the following steps:
SS1, acquiring current information of a branch total table through an electricity consumption information acquisition module, carrying out three-phase balance analysis on the key branch according to the current information, and comparing an analysis result with a corresponding standard range:
if the maximum value of the three-phase current unbalance is within the standard range, performing step SS2;
otherwise, carrying out three-phase balance treatment;
SS2, end power user power analysis:
if the line loss is judged to be caused by the terminal power user, the terminal power user treatment is carried out;
otherwise, the fault factors are checked according to the historical line loss rate.
2. The line loss analysis management system according to claim 1, wherein the process of three-phase balance management is:
performing nuclear phase drawing on the platform region to obtain a platform region topological graph;
leading the topological graph of the transformer area and electricity consumption data into a theoretical computing system to obtain a phase modulation scheme;
and finishing three-phase balance management according to a phase modulation scheme.
3. The line loss analysis management system of claim 1, wherein the process of end-user analysis is:
terminal power user A for checking branches of each station 1 、A 2 、…A n N represents the total terminal power user number;
acquiring historical line loss rate data in a specific period before the station area and power consumption data of each terminal power user;
if the line loss rate meets the requirement A i When not working and the line loss rate is not in accordance with the requirement A i Work, judge A i Affecting the line loss rate of the station area, and treating the terminal power user, wherein i is [1, n ]]；
Otherwise, the terminal power user is checked in the field.
4. The line loss analysis management system according to claim 1, wherein the process of end power user management is:
calculating reactive compensation quantity according to historical average electricity consumption in a specific period of a power user;
and installing corresponding reactive compensation equipment according to the calculated reactive compensation quantity.
5. The line loss analysis management system according to claim 1, wherein the process of photovoltaic access impact analysis is:
acquiring historical generating capacity information in a specific period before a photovoltaic power station;
acquiring line loss rate information in a specific period before the key branch;
judging whether the photovoltaic power generation amount and the line loss rate are positively correlated or not:
if positive correlation is adopted, judging that the photovoltaic access mode is unreasonable, and treating the photovoltaic access mode;
otherwise, the photovoltaic access mode is judged to be reasonable.
6. The line loss analysis management system of claim 1, wherein the process of electricity theft verification comprises:
respectively acquiring line loss qualified electricity consumption data and line loss deviation electricity consumption data of a user in a specific period;
the average electricity consumption E of each user when the line loss is qualified is respectively obtained n Average electricity consumption E in case of line loss deviation u And pass through the formulaCalculating the deviation rate d, and comparing the deviation rate d with a threshold d th And (3) performing comparison:
if d is greater than or equal to d th Judging the user as a suspicious user;
if d < d th Judging the user as a normal user;
and carrying out system data transparent reading on the users with the suspected fraudulent use and carrying out on-site investigation and confirmation.
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| CN116520019B (en) * | 2023-06-30 | 2023-09-12 | 中国电力科学研究院有限公司 | Intelligent electric energy metering device and circuit topology identification method |
| CN116596348A (en) * | 2023-07-18 | 2023-08-15 | 山东盛德智能科技股份有限公司 | Platform area line loss analysis method based on minute-level acquisition |
| CN117761468B (en) * | 2024-02-22 | 2024-05-24 | 国网甘肃省电力公司张掖供电公司 | Multi-parameter operation state monitoring method and system for new energy power station |
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