CN114511147A

CN114511147A - Line loss monitoring and early warning method, device, equipment and storage medium

Info

Publication number: CN114511147A
Application number: CN202210136503.6A
Authority: CN
Inventors: 聂楚飞; 王文慧; 蔡昆仑; 葛海麟; 肖炳建; 邓培源; 陈慧欢; 郑宇宣; 黄钰莹
Original assignee: Guangdong Power Grid Co Ltd; Huizhou Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Huizhou Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-05-17

Abstract

The embodiment of the invention discloses a line loss monitoring and early warning method, a line loss monitoring and early warning device, line loss monitoring and early warning equipment and a storage medium. The method comprises the following steps: acquiring a power grid operation mode corresponding to the current moment; determining the number of each branch in the power grid corresponding to the detection unit according to the operation mode of the power grid, and acquiring real-time electric energy data acquired by each detection unit; determining real-time line loss rate and real-time loss electric quantity of each branch according to each real-time electric energy data; and determining abnormal branch circuits according to the real-time line loss rates, the real-time loss electric quantities and the preset line loss threshold values, and generating corresponding line loss abnormal early warning information according to the abnormal accumulation times of the abnormal branch circuits. The technical scheme of the embodiment of the invention solves the problems that the line loss is difficult to monitor in real time in a power grid, the branch circuit with abnormal line loss is difficult to accurately position and the line loss monitoring labor cost is high, improves the timeliness of line loss determination, reduces the line loss monitoring labor cost and reduces false alarm of abnormal branch line loss caused by tidal current fluctuation.

Description

Line loss monitoring and early warning method, device, equipment and storage medium

Technical Field

The embodiment of the invention relates to the technical field of electric power, in particular to a line loss monitoring and early warning method, device, equipment and storage medium.

Background

The line loss refers to the loss of electric energy in a power grid, and refers to the loss and the loss of electric energy generated in each link of power transmission, power transformation, power distribution and marketing in the process of transmitting the electric energy from a power plant to a power consumer. The main reason for the electric energy loss in the transmission, transformation and distribution processes is the loss generated when the electric energy passes through the lines, transformers and other electric equipment, and the electric energy loss in the marketing link mainly reflects the loss of the difference value between the power supply quantity and the power consumption quantity, which is usually caused by human factors, such as electricity stealing behavior.

The electric energy line loss not only causes serious waste to energy, but also greatly influences the economic benefit of power supply enterprises, so that the monitoring and management of the line loss in the power grid are very important. At present, line loss management mainly screens historical data by investing a large amount of manpower and material resources, line loss determination workload is huge, manual processing often has omission, line loss abnormity is difficult to find in time and electricity stealing behaviors are attacked, and line loss determination timeliness is low due to the fact that the characteristics of 'first use and later calculation' exist in power supply and use.

Disclosure of Invention

The invention provides a line loss monitoring and early warning method, device, equipment and storage medium, which are used for monitoring the line loss of each branch line in a power grid in real time, and further identifying and early warning branches with abnormal line loss, so that the timeliness of line loss determination is improved, the labor cost is reduced, and the timeliness of warning is improved.

In a first aspect, an embodiment of the present invention provides a line loss monitoring and early warning method, including:

acquiring a power grid operation mode corresponding to the current moment;

determining the number of each branch in the power grid corresponding to the detection unit according to the power grid operation mode, and acquiring real-time electric energy data acquired by each detection unit;

determining real-time line loss rate and real-time loss electric quantity of each branch according to each real-time electric energy data;

and determining abnormal branch circuits according to the real-time line loss rates, the real-time loss electric quantities and the preset line loss threshold values, and generating corresponding line loss abnormal early warning information according to the abnormal accumulation times of the abnormal branch circuits.

Furthermore, the power supply is used as an initial end in the power grid, each branch is classified according to the branch times, and the number of the detection unit corresponding to each branch in the power grid is determined according to the operation mode of the power grid, and the method comprises the following steps:

determining the switch state of each branch in the power grid according to the operation mode of the power grid;

and determining the number of the power supply as an initial number, and determining the number of the corresponding detection unit according to the branch switch state corresponding to the previous branch and the previous number of the previous branch.

Further, real-time electric energy data includes real-time electric quantity of supplying, real-time electric quantity of supplying and out and real-time hardware power loss, confirms real-time line loss rate and real-time power loss of each branch road according to each real-time electric energy data, includes:

for each branch, determining the sum of the real-time power supply and power consumption of the hardware corresponding to the branch;

determining the difference value between the corresponding real-time power supply amount of the branch circuit and the sum value as the real-time power loss amount of the branch circuit;

and determining the ratio of the real-time loss electric quantity to the real-time supply electric quantity as the real-time line loss rate of the branch.

Further, before determining the abnormal branch according to each real-time line loss rate, each real-time loss electric quantity and the preset line loss threshold, the method further comprises the following steps:

determining a preset line loss threshold corresponding to each branch according to each real-time electric energy data;

the preset line loss threshold comprises a preset line loss rate threshold and a preset loss electric quantity threshold.

Further, according to each real-time electric energy data, determining a preset line loss threshold corresponding to each branch, including:

determining a preset loss electric quantity threshold value corresponding to each branch according to the real-time supply electric quantity corresponding to each branch;

determining the circuit load-replacing state of each branch circuit according to the real-time power supply and power output corresponding to each branch circuit;

if the circuit loading state of the branch circuit is a light loading state, determining a preset line loss rate threshold value corresponding to the branch circuit as a preset theoretical maximum value; otherwise, determining the product of the theoretical line loss rate corresponding to the branch and the preset multiple as a preset line loss rate threshold corresponding to the branch;

the preset theoretical maximum value is the line loss rate which the branch can not reach in the light load state.

Further, according to each real-time line loss rate, each real-time loss electric quantity and a preset line loss threshold value, determining an abnormal branch circuit, including:

determining the branch with the real-time line loss rate larger than the corresponding preset line loss rate threshold value or the real-time loss electric quantity larger than the corresponding preset loss electric quantity threshold value as an abnormal branch;

and adding one to the abnormal accumulated times corresponding to the abnormal branch.

Further, before determining the real-time line loss rate and the real-time power loss amount of each branch according to each real-time power data, the method further includes:

determining a broken circuit branch in each branch according to each real-time electric energy data;

generating offline early warning information corresponding to the serial number of the detection unit in the broken branch;

and acquiring last electric energy data of the open circuit branch, and determining the last electric energy data as real-time electric energy data of the open circuit branch.

Further, according to the abnormal accumulation times of the abnormal branch, generating corresponding line loss abnormal early warning information, including:

if the abnormal accumulated times of the abnormal branch are larger than a preset time threshold and the abnormal branch is not a broken branch, generating line loss abnormal early warning information corresponding to the abnormal branch, and resetting the abnormal accumulated times;

and if the abnormal accumulated times of the abnormal branch is less than or equal to the preset time threshold or the abnormal branch is a broken branch, returning to the step of acquiring the power grid operation mode corresponding to the current moment.

In a second aspect, an embodiment of the present invention further provides a line loss monitoring and early warning apparatus, including:

the operation mode acquisition module is used for acquiring the power grid operation mode corresponding to the current moment;

the data acquisition module is used for determining the number of each branch in the power grid corresponding to the detection unit according to the power grid operation mode and acquiring real-time electric energy data acquired by each detection unit;

the line loss determining module is used for determining the real-time line loss rate and the real-time loss electric quantity of each branch according to each real-time electric energy data;

and the early warning information generation module is used for determining the abnormal branch according to each real-time line loss rate, each real-time loss electric quantity and the preset line loss threshold value, and generating corresponding line loss abnormal early warning information according to the abnormal accumulation times of the abnormal branch.

In a third aspect, an embodiment of the present invention further provides a line loss monitoring and early warning device, where the line loss monitoring and early warning device includes: a storage device and one or more processors;

storage means for storing one or more programs;

when the one or more programs are executed by the one or more processors, the one or more processors implement the line loss monitoring and warning method according to the first aspect.

In a fourth aspect, embodiments of the present invention further provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform the line loss monitoring and early warning method according to the first aspect.

According to the line loss monitoring and early warning method, the line loss monitoring and early warning device, the line loss monitoring and early warning equipment and the storage medium, the method comprises the steps of obtaining a power grid operation mode corresponding to the current moment; determining the number of each branch in the power grid corresponding to the detection unit according to the power grid operation mode, and acquiring real-time electric energy data acquired by each detection unit; determining real-time line loss rate and real-time loss electric quantity of each branch according to each real-time electric energy data; and determining abnormal branch circuits according to the real-time line loss rates, the real-time loss electric quantities and the preset line loss threshold values, and generating corresponding line loss abnormal early warning information according to the abnormal accumulation times of the abnormal branch circuits. By adopting the technical scheme, the real-time electric energy data acquired by the detection units corresponding to the branches at all levels in the power grid are acquired in real time according to the power grid operation mode corresponding to the current moment, the real-time line loss rate and the real-time loss electric quantity of each branch are further determined according to the real-time electric energy data, when any one of the real-time line loss rate and the real-time loss electric quantity does not accord with the preset line loss threshold value, the corresponding branch is determined to be an abnormal branch, and further, in order to ensure that the line loss in the branch is not caused by the fluctuation of the system power flow, whether corresponding line loss abnormal early warning information is generated or not is determined according to the abnormal accumulated times of the branch determined to be the abnormal branch so as to complete the positioning and early warning of the abnormal branch. The problem of be difficult to in the electric wire netting to line loss real-time supervision, be difficult to pinpoint unusual line loss and take place the branch road and line loss monitoring cost of labor is high is solved, the timeliness that line loss confirmed and the precision of locating to the unusual branch road of line loss have been promoted, the cost of labor of line loss monitoring has been reduced, the promptness of reporting to the police of unusual branch road has been improved, the wrong report to the branch road loss that the trend fluctuation arouses is reduced simultaneously and has been warned.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a flowchart of a line loss monitoring and early warning method according to a first embodiment of the present invention;

fig. 2 is a flowchart of a line loss monitoring and early warning method in the second embodiment of the present invention;

fig. 3a is an exemplary diagram of the number designation of the detection unit of the dual power supply network in the second embodiment of the present invention;

fig. 3b is a naming example diagram of the number of the detecting unit of the single power supply network in the second embodiment of the present invention;

fig. 4 is a flowchart illustrating a process of determining a preset line loss threshold corresponding to each branch according to each real-time power data in the second embodiment of the present invention;

fig. 5 is a schematic structural diagram of a line loss monitoring and early warning device in a third embodiment of the present invention;

fig. 6 is a schematic structural diagram of a line loss monitoring and early warning device in the fourth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

In the description of the present invention, it is to be understood that the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Example one

Fig. 1 is a flowchart of a line loss monitoring and early warning method according to an embodiment of the present invention, where the embodiment is applicable to monitoring line losses of each branch in a power grid and performing positioning and early warning on branches when the line loss is abnormal, the method may be executed by a line loss monitoring and early warning device, the line loss monitoring and early warning device may be implemented by software and/or hardware, the line loss monitoring and early warning device may be configured on a line loss monitoring and early warning device, the line loss monitoring and early warning device may be a computer device, and the computer device may be composed of two or more physical entities or may be composed of one physical entity.

As shown in fig. 1, a line loss monitoring and early warning method provided in an embodiment of the present invention specifically includes the following steps:

and S101, obtaining a power grid operation mode corresponding to the current moment.

In the present embodiment, the grid operation mode may be specifically understood as a power line source of each area in the grid, that is, a distribution mode of electric energy supplied by a power plant or a power supply source in each branch in the whole grid. A transformer area is understood to be in particular the power supply range or area of a transformer in an electrical power system. For example, for a power supply network with dual power supplies, the same power grid can be supplied through two lines, under different power grid operation modes, the power grid can be supplied through a certain line, or the power grid can be supplied through two lines together, and because the tidal current direction in the power grid can be changed greatly along with the difference of power source of the power grid, the power grid operation mode can be formed by branch power source corresponding to each power grid in the power grid.

Specifically, in the power grid, because the tidal current direction in the power grid is changed greatly along with the difference of the power source of the transformer area, the collected data for calculating the line loss are also different, and the power grid operation mode corresponding to the current moment needs to be obtained so as to clarify the power line source of each branch in the power grid.

S102, determining the number of each branch in the power grid corresponding to the detection unit according to the power grid operation mode, and acquiring real-time electric energy data acquired by each detection unit.

In this embodiment, the detection unit may be specifically understood as an electrical engineering component that is disposed at a key node of each branch of the power grid and is configured to collect power supply energy of a higher-level power source received in the branch and power supply information externally supplied by the branch. The real-time power data may be specifically understood as data for measuring the power passing through the detection unit in the branch where the detection unit is located at the current moment.

Specifically, the source of a power supply line corresponding to each branch in the power grid is determined according to the operation mode of the power grid, for a detection unit corresponding to each branch, a branch whose electric energy passes from a power supply to the branch can be determined, the numbers corresponding to the previous branches are sorted according to the sequence of receiving the electric energy, a current number is added to the current branch, the number generated by adding the current number to the number sequence is the number of the detection unit corresponding to the branch in the operation mode of the power grid at the current moment, and then each detection unit can collect the input electric energy information and the output electric energy information thereof to obtain the real-time electric energy data corresponding to the detection unit at the current moment.

In the embodiment of the invention, the detection units corresponding to the branches in the power grid are numbered and determined according to the power grid operation mode at the current moment, the number can be used for determining the prior branch of the current branch and indicating the transmission direction of electric energy in the prior branches, so that the detection units and the branches corresponding to the detection units are unique and easy to identify in the power system, the relation among data collected by the detection units is clear, and the number can be dynamically adjusted according to different power grid operation modes, thereby meeting the data collection requirements when the same power system network adopts different operation modes.

And S103, determining the real-time line loss rate and real-time loss electric quantity of each branch according to each real-time electric energy data.

In the present embodiment, the real-time line loss rate is specifically understood to be the percentage of the electric energy lost in the branch circuit to the electric energy supplied to the branch circuit at the present moment. The real-time power loss can be specifically understood as the difference between the power supply amount and the power consumption amount caused by the fact that the electric energy passes through the electric power equipment such as a line and a transformer at the current moment and other reasons.

Specifically, a difference value between the power supply amount received in each branch and the output power amount is determined according to each real-time power data, the difference value is determined as the real-time loss power amount corresponding to the branch, and the ratio of the real-time loss power amount to the power supply amount received by each branch is determined as the real-time line loss rate corresponding to the branch.

And S104, determining abnormal branch circuits according to the real-time line loss rates, the real-time loss electric quantities and the preset line loss threshold values, and generating corresponding line loss abnormal early warning information according to the abnormal accumulation times of the abnormal branch circuits.

In this embodiment, the preset line loss threshold may be specifically understood as a preset standard determined according to historical data and theoretical data and used for determining whether the branch line loss rate and the loss power amount are abnormal. The abnormal branch is specifically understood to be any branch with an abnormality in the real-time line loss rate and the real-time loss electric quantity. The number of abnormal accumulations may be understood in particular as the number of accumulations of a branch determined as abnormal.

Specifically, the real-time line loss rate and the real-time loss electric quantity of each branch are respectively compared with a preset line loss threshold, when any one of the real-time line loss rate and the real-time loss electric quantity does not meet the preset line loss threshold, the line loss of the corresponding branch is considered to be abnormal, electricity stealing behavior is possible to happen, the branch is determined to be an abnormal branch, meanwhile, the number of abnormal accumulation times corresponding to the branch is increased by one, if the number of abnormal accumulation times reaches a certain value, the electricity stealing behavior is determined to exist in the abnormal branch, and not the branch line loss is abnormal due to tidal current fluctuation in a power grid, corresponding line loss abnormity early warning information is generated at the moment, and therefore workers can check on site conveniently.

The embodiment of the invention obtains the power grid operation mode corresponding to the current moment; determining the number of each branch in the power grid corresponding to the detection unit according to the power grid operation mode, and acquiring real-time electric energy data acquired by each detection unit; determining real-time line loss rate and real-time loss electric quantity of each branch according to each real-time electric energy data; and determining abnormal branch circuits according to the real-time line loss rates, the real-time loss electric quantities and the preset line loss threshold values, and generating corresponding line loss abnormality early warning information according to the abnormal accumulation times of the abnormal branch circuits.

By adopting the technical scheme, the real-time electric energy data acquired by the detection units corresponding to the branches at all levels in the power grid are acquired in real time according to the power grid operation mode corresponding to the current moment, the real-time line loss rate and the real-time loss electric quantity of each branch are further determined according to the real-time electric energy data, when any one of the real-time line loss rate and the real-time loss electric quantity does not accord with the preset line loss threshold value, the corresponding branch is determined to be an abnormal branch, and further, in order to ensure that the line loss in the branch is not caused by the fluctuation of the system power flow, whether corresponding line loss abnormal early warning information is generated or not is determined according to the abnormal accumulated times of the branch determined to be the abnormal branch so as to complete the positioning and early warning of the abnormal branch. The problem of be difficult to in the electric wire netting to line loss real-time supervision, be difficult to pinpoint unusual line loss branch road and line loss monitoring cost of labor is high is solved, the timeliness of line loss determination and the precision of line loss unusual branch road location have been promoted, line loss monitoring cost of labor has been reduced, the wrong report to the branch line loss anomaly that the trend fluctuation arouses has been reduced when having improved the promptness of reporting to the police to unusual branch road.

Example two

Fig. 2 is a flowchart of a line loss monitoring and early warning method provided in the second embodiment of the present invention, in which the technical scheme of the second embodiment of the present invention is further optimized based on the optional technical schemes, the switching state in each branch in the power grid is determined according to the operation mode of the power grid, so as to further clarify the source of the power line of each branch, the power supply serial number is used as the initial serial number, and each branch numbers the detection unit according to the switching state and serial number corresponding to its corresponding superior branch. And determining the real-time line loss rate and real-time loss electric quantity corresponding to each branch according to the real-time power supply and power output and the real-time hardware power loss electric quantity acquired by each detection unit. When the real-time power supply, the real-time power supply and the real-time hardware power loss are obtained, whether each branch is a broken branch is determined, if the branch is the broken branch, off-line early warning is generated, historical data are determined as the real-time power supply, the real-time power supply and the real-time hardware power loss of the branch, a corresponding preset line loss threshold value is determined according to the real-time power supply of each branch, an abnormal branch is determined according to the real-time line loss rate and the real-time power loss of each branch and the corresponding preset line loss threshold value, the abnormal accumulation times corresponding to the abnormal branches are adjusted, and early warning is performed on the abnormal branch according to the abnormal accumulation times corresponding to the abnormal branch and line loss abnormal early warning information generated by the abnormal branch. The off-line state and the line loss state of each branch circuit in the power grid are monitored in real time, early warning is timely carried out when the line loss is off-line or abnormal, the timeliness of line loss determination and the positioning precision of abnormal branch circuits are improved, the manual monitoring cost is reduced, the historical data is used for replacing the real-time acquisition data of the open-circuit branch circuit to carry out line loss judgment, smooth real-time calculation of line loss abnormity is guaranteed, meanwhile, the accumulated abnormal times are considered when the line loss abnormity is judged, the false alarm caused by accidental abnormity is avoided, the line loss abnormity alarm can not be carried out on the open-circuit branch circuit when the alarm is given, and the alarm accuracy is improved.

As shown in fig. 2, a line loss monitoring and early warning method provided in the second embodiment of the present invention specifically includes the following steps:

s201, obtaining a power grid operation mode corresponding to the current moment.

And S202, determining the switch state of each branch in the power grid according to the power grid operation mode.

In this embodiment, the branch switch state may specifically understand the state of whether power is supplied to the next branch through the branch.

Specifically, whether each branch in the power grid needs to supply power to a lower branch while receiving power supplied by a higher branch is determined according to the operation mode of the power grid, if the lower branch needs to supply power, the switch state of the branch is determined to be closed, and if the lower branch does not need to supply power, the switch state of the corresponding branch is determined to be open.

S203, determining the number of the power supply as an initial number, and determining the number of the corresponding detection unit according to the branch switch state corresponding to the previous branch and the previous number of the previous branch.

The power supply is used as an initial end in the power grid, and each branch is classified according to the branch times.

In the present embodiment, the power supply source can be specifically understood as a power source in the power grid for supplying power to each branch in the power grid and the power purchasing load in the branch. The number of the previous stage is specifically understood as the number of the detection unit corresponding to the branch of the previous stage.

Specifically, a power supply in a power grid is used as an initial end, the power supply is numbered, a branch which is directly supplied by the power supply is determined as a next-stage branch of the initial end, the branches which are supplied with power by the same power supply are sequentially numbered on the basis of keeping the serial number of the power supply, and then the branches are branched again along with the branches, the branches at the next stage are determined, and the branches are classified according to the branching times. The serial number of the power supply is determined as an initial serial number, the power supply is sequentially supplied with the initial serial number as a first serial number, each level of branch circuits with closed branch circuit switching states are numbered, each next-level serial number is added with a serial number in sequence on the basis of the previous-level serial number of the previous-level branch circuit with closed branch circuit switching states, and the serial number is determined as the serial number of the branch circuit corresponding to the detection unit.

For example, fig. 3a is a named example diagram of the number of the detection unit of the dual power supply network provided by the second embodiment of the present invention, where P1 and P2 are two power supplies in the power grid, and use them as starting points to supply power to the lower branch, the lower branch can simultaneously receive power supplied by the branches P1 and P2, when the switch state of the branch corresponding to the P1 branch is closed, and the switch state of the branch corresponding to the P2 branch is open, the lower branch can sequentially add a number on the basis of the number of the upper branch being P1, and determine P1-T1 as the number of the detection unit corresponding to the lower branch.

In the above example, fig. 3b is a naming example diagram of numbers of detecting units in a single power supply network according to a second embodiment of the present invention, where P3 is a power supply in a power grid, and the power supply is used as a starting point to supply power to a lower branch, and simultaneously supplies power to two lower branches, that is, the switching state of the branch corresponding to the P3 branch is closed, and the two lower branches receiving power supply may sequentially add a non-repeating number on the basis of the number of the upper branch being P3, and determine P3-T1 and P3-T2 as the numbers of the detecting units corresponding to the two lower branches, respectively.

And S204, acquiring real-time electric energy data acquired by each detection unit.

The real-time electric energy data comprise real-time electric quantity supply, real-time electric quantity supply and real-time hardware power consumption.

In the present embodiment, the real-time power supply is understood to be the power received by the detection unit from the power grid in real time. The real-time power supply and output can be specifically understood as the real-time power output from the detection unit to the subordinate branch in the power grid and the load connected with the subordinate branch. The real-time hardware power consumption can be specifically understood as the sum of the power consumption in the power grid due to the transformer no-load consumption, the circuit transmission consumption and the power consumption when the terminal performs calculation.

S205, determining whether each branch has a broken branch according to each real-time electric energy data, if yes, executing a step S206; if not, go to step S208.

Specifically, since the detection unit on the branch cannot successfully acquire the real-time electric energy data when the branch has the open circuit problem, the real-time electric energy data acquired by the detection unit can be acquired by the corresponding detection unit according to the power grid operation mode corresponding to the current time, the branch which cannot successfully acquire the real-time electric energy data is determined as an open circuit branch, and step S206 is executed when the open circuit branch exists in each branch, and step S208 is executed if the open circuit branch does not exist in each branch.

And S206, generating offline early warning information corresponding to the serial number of the detection unit in the broken branch.

Specifically, after determining that the detection unit cannot acquire the open circuit branch of the real-time electric energy data in an offline manner, early warning prompt needs to be performed on a worker, so that the worker can check the open circuit branch, the power grid can normally operate according to the power grid operation mode, corresponding offline early warning information is generated according to the number of the detection unit in the open circuit branch, and the number is unique in the power grid, so that the worker can conveniently position the open circuit branch according to the generated offline early warning information.

And S207, acquiring last electric energy data of the open circuit branch, and determining the last electric energy data as real-time electric energy data of the open circuit branch.

Specifically, in order to ensure smooth calculation of the real-time line loss rate and the real-time loss electric quantity of each branch circuit corresponding to the power grid operation mode at the current moment, even if the open-circuit branch circuit exists, the corresponding real-time electric energy data is provided to facilitate calculation of other branch circuits, so that the last electric energy data acquired by the open-circuit branch circuit at the last acquisition moment can be used as the real-time electric energy data at the current moment to facilitate smooth calculation.

And S208, determining the sum of the real-time power supply and output and the real-time hardware power loss corresponding to each branch.

Specifically, for any branch in the power grid in the current power grid operation mode, the corresponding real-time power supply and output capacity and the real-time hardware power loss capacity can be summed, so that the known external output capacity can be determined.

And S209, determining the difference value between the corresponding real-time supply electric quantity of the branch and the sum value as the real-time loss electric quantity of the branch.

Specifically, the real-time supply power corresponding to the branch is subtracted by the corresponding known external output power, and the difference value can be used to represent the power loss of the branch due to unknown reasons, and the value is determined as the real-time power loss of the branch.

And S210, determining the ratio of the real-time loss electric quantity to the real-time supply electric quantity as the real-time line loss rate of the branch.

And S211, determining a preset line loss threshold corresponding to each branch according to each real-time electric energy data.

The preset line loss threshold value comprises a preset line loss rate threshold value and a preset loss electric quantity threshold value.

Further, fig. 4 is an exemplary diagram of a process for determining the preset line loss threshold corresponding to each branch according to each real-time power data according to a second embodiment of the present invention, as shown in fig. 4, specifically including the following steps:

s2111, determining a preset loss electric quantity threshold value corresponding to each branch according to the real-time supply electric quantity corresponding to each branch.

Specifically, as the real-time power supply amount in the branch circuits increases, the corresponding power loss amount inevitably increases, and for accurately determining whether the line loss of each branch circuit is abnormal, the corresponding preset power loss amount threshold needs to be determined according to the real-time power supply amount corresponding to the branch circuit. It should be clear that the preset lost power threshold may be preset according to historical data and actual conditions, which is not limited in the embodiment of the present invention.

For example, the preset loss electric quantity threshold value can be determined according to the following table for different categories in the power grid:

s2112, determining the circuit loading state of each branch circuit according to the real-time power supply and power output corresponding to each branch circuit.

In the present embodiment, the circuit loading status may be specifically understood as a status parameter for characterizing the loading rate of the circuit.

Specifically, the circuit load-replacing state corresponding to each branch is determined according to the real-time power supply and the real-time power supply corresponding to each branch and by combining a preset load-replacing state determination standard.

For example, for different classifications in the power grid, if the target is a line, the power supply of the line is lower than 3 ten thousand kWh at the same time, and the line is regarded as light load; if the target object is a distribution area, the distribution area may be regarded as a light load when the power supply of the distribution area is 20 times lower than the capacity of the transformer, and it should be clear that the light load determination manner is only one optional implementation manner provided by the embodiment of the present invention, and the specific determination standard may be determined according to an actual situation, which is not limited by the embodiment of the present invention.

S2113, judging whether the circuit loading state of the branch circuit is a light-load state, if so, executing a step S2114; otherwise, step S2115 is performed.

S2114, determining the preset line loss rate threshold corresponding to the branch as a preset theoretical maximum value.

The preset theoretical maximum value is the line loss rate which the branch cannot reach in the light load state.

Specifically, the circuit branch in the light load state in the power grid does not need to examine the circuit line loss rate abnormality, so that when the circuit representative load state of the branch is judged to be the light load state, the corresponding preset line loss rate threshold value is determined to be the maximum value determined according to the theory, namely the line loss rate which cannot be reached by the branch in the light load state, and the branch is directly judged to be qualified when the real-time line loss rate and the preset line loss rate threshold value are judged subsequently.

S2115, determining the product of the theoretical line loss rate corresponding to the branch and the preset multiple as the preset line loss rate threshold corresponding to the branch.

In this embodiment, the theoretical line loss rate may be specifically understood as a line loss rate obtained by theoretical calculation according to parameters of the power supply device, a power grid operation mode, power flow distribution, and a load condition.

Optionally, 1.2 times of the theoretical line loss rate may be determined as a preset line loss rate threshold, if the line loss rate is exceeded, it may be considered that the branch has abnormal power supply, and the preset multiple may be preset according to an actual situation, which is not limited in the embodiment of the present invention.

S212, determining the branch with the real-time line loss rate larger than the corresponding preset line loss rate threshold value or the real-time loss electric quantity larger than the corresponding preset loss electric quantity threshold value as an abnormal branch.

Specifically, if the real-time line loss rate of a branch is greater than the corresponding preset line loss rate threshold, or the real-time loss electric quantity is greater than the corresponding preset loss electric quantity threshold, it can be considered that an abnormal loss of electric quantity exists in the branch, and at this time, the corresponding branch can be determined as an abnormal branch.

S213, adding one to the abnormal accumulated times corresponding to the abnormal branch.

S214, judging whether the abnormal accumulated times of the abnormal branch is greater than a preset time threshold value or not and the abnormal branch is not a broken branch, if so, executing a step S215; if not, the process returns to step S201.

Specifically, a preset time threshold is set to ensure that the line loss abnormality in the abnormal branch is not a one-time line loss abnormality caused by the system power flow fluctuation in the power grid, and the abnormal branch is determined to be abnormal for multiple times only until the accumulated number of times of the abnormality is greater than the preset time threshold, so that the abnormal loss of the electric quantity is determined to exist in the abnormal branch. Meanwhile, the real-time line loss rate and the real-time loss electric quantity of the broken branch are not real-time electric energy data of the broken branch at the current moment, so that the problem that line loss abnormity early warning is needed in the broken branch cannot be solved even if the abnormal accumulated times corresponding to the broken branch are greater than the preset times threshold. Therefore, only in the case that whether the abnormal accumulated number of times of the abnormal branch is simultaneously satisfied is greater than the preset number threshold and the abnormal branch is not a broken branch, the step S215 is executed; otherwise, considering that each branch circuit normally operates in the power grid operation mode corresponding to the current moment, and no part needing line loss abnormity early warning exists, and returning to execute the step S201 at the next acquisition moment.

Optionally, the preset number threshold may be 3, which may be preset according to an actual situation, and this is not limited in the embodiment of the present invention.

And S215, generating line loss abnormity early warning information corresponding to the abnormal branch, and clearing the abnormity accumulation times.

Specifically, the abnormal line loss early warning information is generated according to the number corresponding to the abnormal branch, so that a worker can position the abnormal branch and timely overhaul the abnormal branch according to the abnormal line loss early warning information, and the abnormal accumulated times of the abnormal branch are reset, so that the working state of the abnormal branch can be re-evaluated during subsequent line loss monitoring and early warning.

The technical scheme of the embodiment of the invention comprises the steps of firstly determining the switching state of each branch in a power grid at the current moment according to the running mode of the power grid, further determining the number corresponding to a lower branch detection unit according to the power line source of each branch and the number of a higher branch thereof, enabling each branch to carry out unique and easily-identified marking in the power grid, determining whether each branch has an offline branch according to real-time electric energy data collected by each detection unit, alarming the offline branch, simultaneously substituting the corresponding historical electric energy data into the line loss monitoring at the current moment so as to facilitate the smooth determination of the real-time line loss rate and the real-time electric energy loss of each branch in the power grid, determining the corresponding preset line loss threshold value according to the real-time electric energy supply of each branch, and further determining an abnormal branch according to the real-time line loss rate and the real-time electric energy loss of each branch and the corresponding preset line loss threshold value, and adjusting the abnormal accumulation times corresponding to the abnormal branch, and performing early warning on the abnormal branch according to the abnormal accumulation times corresponding to the abnormal branch and line loss abnormality early warning information generated by whether the abnormal branch is a broken branch. The off-line state and the line loss state of each branch circuit in the power grid are monitored in real time, early warning is timely carried out when the line loss is off-line or abnormal, the timeliness of line loss determination and the positioning precision of abnormal branch circuits are improved, the manual monitoring cost is reduced, the historical data is used for replacing the real-time acquisition data of the open-circuit branch circuit to carry out line loss judgment, smooth real-time calculation of line loss abnormity is guaranteed, meanwhile, the accumulated abnormal times are considered when the line loss abnormity is judged, the false alarm caused by accidental abnormity is avoided, the line loss abnormity alarm can not be carried out on the open-circuit branch circuit when the alarm is given, and the alarm accuracy is improved.

EXAMPLE III

Fig. 5 is a schematic structural diagram of a line loss monitoring and early warning device provided in the third embodiment of the present invention, where the line loss monitoring and early warning device includes: an operation mode obtaining module 31, a data obtaining module 32, a line loss determining module 33 and an early warning information generating module 34.

The operation mode obtaining module 31 is configured to obtain a power grid operation mode corresponding to a current moment; the data acquisition module 32 is used for determining the number of the detection unit corresponding to each branch in the power grid according to the power grid operation mode and acquiring real-time electric energy data acquired by each detection unit; the line loss determining module 33 is configured to determine a real-time line loss rate and a real-time loss electric quantity of each branch according to each real-time electric energy data; and the early warning information generating module 34 is configured to determine an abnormal branch according to each real-time line loss rate, each real-time loss electric quantity, and a preset line loss threshold, and generate corresponding line loss abnormal early warning information according to the abnormal cumulative number of times of the abnormal branch.

According to the technical scheme of the embodiment of the invention, the problems that the line loss is difficult to monitor in real time in a power grid, the branch circuit with abnormal line loss is difficult to accurately position and the line loss monitoring labor cost is high are solved, the timeliness of line loss determination and the accuracy of positioning the branch circuit with abnormal line loss are improved, the line loss monitoring labor cost is reduced, the alarm timeliness of abnormal branch circuit alarm is improved, and the false alarm of abnormal branch circuit loss caused by tidal current fluctuation is reduced.

Optionally, the power supply is used as an initial end in the power grid, and each branch is classified according to the branching times.

Optionally, the data obtaining module 32 includes:

and the switch state acquisition unit is used for determining the switch state of each branch in the power grid according to the power grid operation mode.

And the number determining unit is used for determining the number of the power supply as an initial number, and each branch determines the number of the corresponding detection unit according to the branch switch state corresponding to the previous branch and the previous number of the previous branch.

And the data acquisition unit is used for acquiring the real-time electric energy data acquired by each detection unit.

Further, the real-time power data comprises real-time power supply, real-time power supply and real-time hardware power consumption.

Optionally, the line loss determining module 33 includes:

and the sum value determining unit is used for determining the sum value of the real-time power supply and output and the real-time hardware power consumption corresponding to each branch circuit.

And the loss electric quantity determining unit is used for determining the difference value between the corresponding real-time supply electric quantity of the branch circuit and the sum value as the real-time loss electric quantity of the branch circuit.

And the line loss rate determining unit is used for determining the ratio of the real-time loss electric quantity to the real-time supply electric quantity as the real-time line loss rate of the branch.

Optionally, the line loss monitoring and early warning device further includes:

the threshold determining module is used for determining a preset line loss threshold corresponding to each branch according to each real-time electric energy data before determining an abnormal branch according to each real-time line loss rate, each real-time loss electric quantity and the preset line loss threshold; the preset line loss threshold comprises a preset line loss rate threshold and a preset loss electric quantity threshold.

And the open circuit branch determining module is used for determining open circuit branches in all the branches according to all the real-time electric energy data.

And the circuit breaking early warning module is used for generating offline early warning information corresponding to the serial number of the detection unit in the circuit breaking branch.

And the circuit breaking data determining module is used for acquiring the last electric energy data of the circuit breaking branch and determining the last electric energy data as the real-time electric energy data of the circuit breaking branch.

Optionally, the threshold determining module is specifically configured to:

Optionally, the warning information generating module 34 includes:

the abnormal branch determining unit is used for determining the branch of which the real-time line loss rate is greater than the corresponding preset line loss rate threshold value or the real-time loss electric quantity is greater than the corresponding preset loss electric quantity threshold value as an abnormal branch; and adding one to the abnormal accumulated times corresponding to the abnormal branch.

The line loss early warning generation unit is used for generating line loss abnormal early warning information corresponding to the abnormal branch if the abnormal accumulated times of the abnormal branch is greater than a preset time threshold and the abnormal branch is not a broken branch, and resetting the abnormal accumulated times; and if the abnormal accumulated times of the abnormal branch is less than or equal to the preset time threshold or the abnormal branch is a broken branch, returning to the step of acquiring the power grid operation mode corresponding to the current moment.

The line loss monitoring and early warning device provided by the embodiment of the invention can execute the line loss monitoring and early warning method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.

Example four

Fig. 6 is a schematic structural diagram of a line loss monitoring and early-warning device according to a fourth embodiment of the present invention. This line loss monitoring and early warning equipment includes: a processor 40, a storage device 41, a display 42, an input device 43, and an output device 44. The number of the processors 40 in the line loss monitoring and early warning device may be one or more, and one processor 40 is taken as an example in fig. 6. The number of the storage devices 41 in the line loss monitoring and early warning apparatus may be one or more, and one storage device 41 is taken as an example in fig. 6. The processor 40, the storage device 41, the display 42, the input device 43 and the output device 44 of the line loss monitoring and early warning apparatus may be connected by a bus or in other manners, and fig. 6 illustrates the connection by the bus as an example. In an embodiment, the line loss monitoring and early warning device may be a computer, a notebook, or an intelligent tablet.

The storage device 41 is a computer-readable storage medium, and can be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the line loss monitoring and warning device according to any embodiment of the present application (for example, the operation mode obtaining module 31, the data obtaining module 32, the line loss determining module 33, and the warning information generating module 34). The storage device 41 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the device, and the like. Further, the storage device 41 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, storage 41 may further include memory located remotely from processor 40, which may be connected to the device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The display screen 42 may be a touch-enabled display screen 42, which may be a capacitive screen, an electromagnetic screen, or an infrared screen. In general, the display screen 42 is used for displaying data according to instructions from the processor 40, and is also used for receiving touch operations applied to the display screen 42 and sending corresponding signals to the processor 40 or other devices.

The input means 43 may be used for receiving input numeric or character information and generating key signal inputs related to user settings and function controls of the presentation apparatus, and may be a camera for acquiring images and a sound pickup apparatus for acquiring audio data. The output device 44 may include an audio device such as a speaker. It should be noted that the specific composition of the input device 43 and the output device 44 can be set according to actual conditions.

The processor 40 executes various functional applications and data processing of the device by running software programs, instructions and modules stored in the storage device 41, that is, the line loss monitoring and early warning method is implemented.

The computer equipment provided by the above can be used for executing the line loss monitoring and early warning method provided by any of the above embodiments, and has corresponding functions and beneficial effects.

EXAMPLE five

An embodiment of the present invention further provides a storage medium containing computer-executable instructions, where the computer-executable instructions are executed by a computer processor to perform a line loss monitoring and early warning method, where the method includes:

acquiring a power grid operation mode corresponding to the current moment;

Of course, the storage medium provided by the embodiment of the present invention includes computer-executable instructions, and the computer-executable instructions are not limited to the operations of the method described above, and may also perform related operations in the line loss monitoring and early warning method provided by any embodiment of the present invention.

From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.

It should be noted that, in the embodiment of the above search apparatus, each included unit and module are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A line loss monitoring and early warning method is characterized by comprising the following steps:

acquiring a power grid operation mode corresponding to the current moment;

determining the real-time line loss rate and real-time loss electric quantity of each branch according to each real-time electric energy data;

and determining abnormal branches according to the real-time line loss rates, the real-time loss electric quantities and a preset line loss threshold, and generating corresponding line loss abnormal early warning information according to the abnormal accumulation times of the abnormal branches.

2. The method according to claim 1, wherein the power supply is used as a starting end in the power grid, each branch is classified according to the branch times, and the determining of the number of the detection unit corresponding to each branch in the power grid according to the power grid operation mode comprises:

determining the switch state of each branch in the power grid according to the power grid operation mode;

and determining the number of the power supply as an initial number, and determining the number of the corresponding detection unit by each branch according to the branch switch state corresponding to the previous branch and the previous number of the previous branch.

3. The method of claim 1, wherein the real-time power data comprises real-time power in, real-time power out, and real-time hardware power loss; the determining the real-time line loss rate and the real-time loss electric quantity of each branch according to each real-time electric energy data includes:

for each branch, determining the sum of the real-time power supply and output and the real-time hardware power loss corresponding to the branch;

determining the difference value between the corresponding real-time electricity supply quantity of the branch and the sum value as the real-time electricity loss quantity of the branch;

4. The method according to claim 3, wherein before said determining abnormal branch according to each of the real-time line loss rates, each of the real-time power loss amounts, and a preset line loss threshold, further comprising:

5. The method of claim 4, wherein determining the preset line loss threshold corresponding to each branch according to each real-time power data comprises:

determining a circuit load-replacing state of each branch circuit according to the real-time power supply and power output corresponding to each branch circuit;

if the circuit loading state of the branch circuit is a light loading state, determining a preset line loss rate threshold value corresponding to the branch circuit as a preset theoretical maximum value; otherwise, determining the product of the theoretical line loss rate corresponding to the branch and a preset multiple as a preset line loss rate threshold corresponding to the branch;

the preset theoretical maximum value is a line loss rate which cannot be achieved by the branch in the light load state.

6. The method of claim 4, wherein the determining abnormal branch according to each real-time line loss rate, each real-time loss power and a preset line loss threshold comprises:

7. The method of claim 1, wherein before determining the real-time line loss rate and the real-time power loss of each branch according to each real-time power data, the method further comprises:

determining a broken branch in each branch according to each real-time electric energy data;

generating offline early warning information corresponding to the serial number of the detection unit in the open circuit branch;

and acquiring last electric energy data of the circuit breaking branch, and determining the last electric energy data as real-time electric energy data of the circuit breaking branch.

8. The method according to claim 7, wherein the generating of the corresponding line loss abnormality warning information according to the abnormal accumulation times of the abnormal branch comprises:

if the abnormal accumulated times of the abnormal branch are larger than a preset time threshold and the abnormal branch is not a broken branch, generating line loss abnormal early warning information corresponding to the abnormal branch and resetting the abnormal accumulated times;

and if the abnormal accumulated times of the abnormal branch are less than or equal to a preset time threshold or the abnormal branch is a broken branch, returning to execute the power grid operation mode corresponding to the current moment.

9. The utility model provides a line loss monitoring and early warning device which characterized in that includes:

and the early warning information generating module is used for determining abnormal branch circuits according to the real-time line loss rates, the real-time loss electric quantities and the preset line loss threshold values, and generating corresponding line loss abnormal early warning information according to the abnormal accumulation times of the abnormal branch circuits.

10. The utility model provides a line loss monitoring and early warning equipment which characterized in that, line loss monitoring and early warning equipment includes: a storage device and one or more processors;

the storage device to store one or more programs;

when executed by the one or more processors, cause the one or more processors to implement the line loss monitoring and warning method of any one of claims 1-8.

11. A storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform the line loss monitoring and warning method according to any one of claims 1 to 8.