CN116151690B

CN116151690B - Loss reduction effect evaluation method and device for reactive power optimization of station domain

Info

Publication number: CN116151690B
Application number: CN202310349101.9A
Authority: CN
Inventors: 杜双育; 王丽; 姜磊
Original assignee: Brilliant Data Analytics Inc
Current assignee: Brilliant Data Analytics Inc
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-07-07
Anticipated expiration: 2043-04-04
Also published as: CN116151690A

Abstract

The invention relates to the technical field of power distribution network planning, and discloses a loss reduction effect evaluation method for station domain reactive power optimization, which comprises the following steps: extracting a tie line set from a line topology diagram of a distribution line, and sequentially performing tie switch state simulation and topology reconstruction operation on the distribution line by using the tie line set to obtain a tie switch state group set; calculating a state group power consumption characteristic set of the contact switch state group set; extracting a standard transfer characteristic set from the state group power consumption characteristic set, and generating a transfer circuit set corresponding to the transfer characteristic set; and carrying out transfer effect labeling on the transfer line set to obtain a standard transfer line set, extracting recommended transfer lines from the standard transfer line set, and generating a loss reduction evaluation table of the distribution line by utilizing the standard transfer line set and the recommended transfer lines. The invention further provides a loss reduction effect evaluation device for station domain reactive power optimization. The invention can improve the accuracy of loss reduction effect evaluation.

Description

Loss reduction effect evaluation method and device for reactive power optimization of station domain

Technical Field

The invention relates to the technical field of power distribution network planning, in particular to a loss reduction effect evaluation method and device for station domain reactive power optimization.

Background

The distribution network receives electric energy from a power transmission network or a regional power plant, is distributed on site through a distribution facility or distributed to various users step by step according to voltage, plays an important role in distributing the electric energy in the power network, however, the distribution network can generate power loss due to factors such as wire resistance, infrastructure aging and the like in the power distribution process, and in order to improve the power supply efficiency, loss reduction effect evaluation needs to be carried out on the distribution network.

The existing loss reduction effect evaluation method is mainly based on the effect evaluation method of the state of the fixed power grid interconnection switch, and loss electric quantity corresponding to the state of the fixed power grid interconnection switch is calculated by adjusting power supply voltage, so that loss reduction evaluation is realized, in the actual process, the electric quantity loss of the power grid can be greatly changed due to the change of the state of the interconnection switch between the power grids, and the accuracy in loss reduction effect evaluation can be lower due to the effect evaluation method based on the state of the fixed power grid interconnection switch.

Disclosure of Invention

The invention provides a loss reduction effect evaluation method and device for station domain reactive power optimization, and mainly aims to solve the problem of lower accuracy in loss reduction effect evaluation.

In order to achieve the above purpose, the invention provides a loss reduction effect evaluation method for station domain reactive power optimization, which comprises the following steps:

acquiring a line topology diagram of a distribution line, extracting a tie line set from the line topology diagram, and sequentially performing tie switch state simulation and topology reconstruction operation on the distribution line by using the tie line set to obtain a tie switch state group set;

selecting the interconnection switch state groups in the interconnection switch state group one by one as target interconnection switch state groups, and respectively calculating the load rate, the loss electric quantity, the line loss rate and the electricity saving quantity of the target interconnection switch state groups, wherein the calculation of the load rate, the loss electric quantity, the line loss rate and the electricity saving quantity of the target interconnection switch state groups comprises the following steps: selecting the tie switch states in the target tie switch state groups one by one as target tie switch states, acquiring state line parameter groups of each section of line in the target tie switch states, and converging all the state line parameter groups into a state line parameter group set; extracting a state primary active power curve set from the state line parameter set, and calculating the state load rate of the state of the target tie switch by using a preset integral load algorithm and the state primary active power curve set; calculating the state loss electric quantity of the target tie switch state by using the following reactive power loss formula and the state line parameter set:

Wherein, the liquid crystal display device comprises a liquid crystal display device,

means that the state loses power, +.>

Means the distribution time length corresponding to the state of the target contact switch,/->

Refers to->

Personal (S)>

Refers to the total number of said state line parameter sets,/->

Means +.>

Root mean square of active power corresponding to each state line parameter group,/->

Means +.>

Root mean square,/or +_ of reactive power corresponding to each status line parameter set>

Means +.>

Line voltage corresponding to the individual state line parameter set, < >>

Means +.>

Line resistances corresponding to the respective state line parameter sets; acquiring historical energy supply electric quantity and historical energy loss electric quantity corresponding to the target tie switch state, and enabling the state energy loss electric quantity and the historical energy supply electric quantity to be equal to each otherThe ratio between the quantities is used as a state line loss rate, and the difference value between the historical power consumption and the state power consumption is used as a state power saving quantity; integrating all state load rates into the load rate of the target interconnection switch state group, integrating all state loss electric quantity into the loss electric quantity of the target interconnection switch state group, integrating all state line loss rates into the line loss rate of the target interconnection switch state group, and integrating all state electricity saving quantities into the electricity saving quantity of the target interconnection switch state group;

The load rate, the power consumption quantity, the line loss rate and the power saving quantity are collected into a target state group power consumption characteristic of the target tie switch state group, and all the target state group power consumption characteristics are collected into a state group power consumption characteristic set;

extracting a standard transfer characteristic set from the state group power consumption characteristic set, and generating a transfer line set corresponding to the standard transfer characteristic set, wherein the extracting the standard transfer characteristic set from the state group power consumption characteristic set comprises the following steps: the method comprises the steps of selecting state group power consumption characteristics in a state group power consumption characteristic set one by one as target state group power consumption characteristics, taking a load factor characteristic group in the target state group power consumption characteristics as a target load factor characteristic group, and selecting state load factor characteristics in the target load factor characteristic group one by one as target state load factor characteristics; judging whether the load factor characteristic of the target state is smaller than a preset load characteristic threshold value or not; if not, returning to the step of selecting the state load rate characteristics in the target load rate characteristic groups one by one as the target state load rate characteristics; if yes, taking the state line loss rate feature corresponding to the target state load rate feature in the power consumption feature of the target state group as a target state line loss rate feature, and judging whether the target state line loss rate feature is smaller than a preset line loss feature threshold; if not, returning to the step of selecting the state load rate characteristics in the target load rate characteristic groups one by one as the target state load rate characteristics; if so, adding a state power saving quantity feature corresponding to the target state load rate feature in the power consumption feature of the target state group into a primary power saving quantity feature group, and taking the primary power saving quantity feature group as a standard power saving quantity feature group until the target state load rate feature is the last state load rate feature in the target load rate feature group; taking the state power saving quantity characteristic with the largest value in the standard power saving quantity characteristic group as a standard power saving quantity characteristic, collecting the state load rate characteristic, the state line loss rate characteristic and the state loss electric quantity characteristic corresponding to the standard power saving quantity characteristic into a standard transfer characteristic group, and collecting all the standard transfer characteristic groups into a standard transfer characteristic group set;

And carrying out transfer effect labeling on the transfer line set to obtain a standard transfer line set, extracting a recommended transfer line from the standard transfer line set, and generating a loss reduction evaluation table of the distribution line by utilizing the standard transfer line set and the recommended transfer line.

Optionally, the extracting the contact line set from the line topology map includes:

taking the distribution line as a target vertex of the line topological graph, and adding the target vertex into a preset line matrix;

deleting the target vertex and the directed edge of the target vertex from the circuit topological graph to obtain a secondary circuit topological graph;

updating the line topology map by using the secondary line topology map, updating the target vertex by using a non-precursor vertex in the line topology map, and returning to the step of adding the target vertex to a preset line matrix until the target vertex is the last vertex in the line topology map, wherein the line matrix is used as a target line matrix;

and extracting the connecting lines from the target line matrix one by one, and collecting all the connecting lines into a connecting line set.

Optionally, the performing, by using the interconnection line set, interconnection switch state simulation and topology reconstruction operations on the distribution line sequentially, to obtain an interconnection switch state set, including:

selecting the contact lines in the contact line set one by one as target contact lines, and splicing the target contact lines and the distribution lines into a target combined line;

performing tie switch state simulation on the target combined line to obtain a primary tie line state group;

performing topology reconstruction on the primary tie line state group to obtain a tie switch state group;

all tie switch state groups are collected into a tie switch state group set.

Optionally, the performing topology reconstruction on the primary tie line state set to obtain a tie switch state set includes:

selecting primary contact line states in the primary contact line state group one by one as target contact line states;

taking a power transformation parent station and a line interconnecting switch of a line in the target interconnecting line state as vertexes, taking the line in the target interconnecting line state as an edge, and generating a primary topology state diagram according to all vertexes and all edges;

And screening isolated points from the primary topological state diagram to obtain a standard topological state diagram, extracting standard tie switch states from the standard topological state diagram, and collecting all the standard tie switch states into a tie switch state group.

Optionally, the calculating the state load rate of the target tie switch state by using a preset integral load algorithm and the state primary active power curve set includes:

performing Kalman filtering on each state primary power curve in the state primary active power curve set to obtain a state standard power curve set, and extracting a state maximum active power set from the state standard power curve set;

calculating the state load rate of the target tie switch state according to the state maximum active power set and the state standard power curve set by using the following integral load algorithm:

means the status load rate, +.>

Refers to->

Personal (S)>

Refers to the total number of state primary active power curves in the state primary active power curve set, and the total number of the state primary active power curves is equal to the total number of state line parameter sets, +. >

Means +.f in the state standard power curve set>

Power versus time function corresponding to the individual state standard power curve,/->

Means +.f in the state standard power curve set>

The individual state standard power curve is +.>

Active power corresponding to time, +.>

Is the sign of the maximum value and,

refers to the +.sup.th of the maximum active power concentration of the state>

Individual state maximum active power, +.>

Is a sign of a calculus of the method,

refers to pair->

Is a function of the integral of (a).

Optionally, the aggregating the load factor, the power consumption, the line loss factor, and the power saving amount into the target state group power consumption characteristic of the target tie switch state group includes:

the state load rates in the load rates are selected one by one to serve as target state load rates, the target state load rates are normalized to state load rate characteristics, and all the state load rate characteristics are collected to form a load rate characteristic group;

the state loss electric quantity in the loss electric quantity is selected one by one to serve as a target state loss electric quantity, the target state loss electric quantity is normalized to form state loss electric quantity characteristics, and all the state loss electric quantity characteristics are collected to form a loss electric quantity characteristic group;

The state line loss rate in the line loss rates is selected one by one to serve as a target state line loss rate, the target state line loss rate is normalized to form state line loss rate characteristics, and all the state line loss rate characteristics are collected to form a line loss rate characteristic group;

the state electricity-saving quantity in the electricity-saving quantity is selected one by one to serve as a target state electricity-saving quantity, the target state electricity-saving quantity is normalized to form state electricity-saving quantity characteristics, and all the state electricity-saving quantity characteristics are collected to form an electricity-saving quantity characteristic group;

and splicing the load rate characteristic group, the power consumption characteristic group, the line loss rate characteristic group and the power saving quantity characteristic group into a power consumption characteristic of a target state group.

Optionally, the extracting the standard transfer feature set from the state set power consumption feature set includes:

the method comprises the steps of selecting state group power consumption characteristics in a state group power consumption characteristic set one by one as target state group power consumption characteristics, taking a load factor characteristic group in the target state group power consumption characteristics as a target load factor characteristic group, and selecting state load factor characteristics in the target load factor characteristic group one by one as target state load factor characteristics;

judging whether the load factor characteristic of the target state is smaller than a preset load characteristic threshold value or not;

If not, returning to the step of selecting the state load rate characteristics in the target load rate characteristic groups one by one as the target state load rate characteristics;

if yes, taking the state line loss rate feature corresponding to the target state load rate feature in the power consumption feature of the target state group as a target state line loss rate feature, and judging whether the target state line loss rate feature is smaller than a preset line loss feature threshold;

if so, adding a state power saving quantity feature corresponding to the target state load rate feature in the power consumption feature of the target state group into a primary power saving quantity feature group, and taking the primary power saving quantity feature group as a standard power saving quantity feature group until the target state load rate feature is the last state load rate feature in the target load rate feature group;

and collecting the state load rate characteristic, the state line loss rate characteristic and the state loss electric quantity characteristic corresponding to the standard electricity saving quantity characteristic as a standard electricity saving quantity characteristic, and collecting all the standard transfer characteristic groups as a standard transfer characteristic group set.

Optionally, the generating a transfer line set corresponding to the standard transfer feature set includes:

selecting the standard transfer characteristic groups in the standard transfer characteristic groups one by one as target transfer characteristic groups;

selecting a standard interconnection switch state corresponding to the target transfer characteristic group from the interconnection switch state group set as a target standard interconnection switch state;

and taking the connecting line corresponding to the target standard connecting switch state as a transfer line, and collecting all the transfer lines into a transfer line set.

Optionally, the transferring and supplying effect labeling is performed on the transferring and supplying line set to obtain a standard transferring and supplying line set, including:

selecting transfer supply lines in the transfer supply line set one by one as target transfer supply lines;

carrying out state labeling on the target transfer line by using the contact switch state corresponding to the target transfer line to obtain a state transfer line;

and marking the effect of the target transfer line by using the standard transfer characteristic group corresponding to the target transfer line to obtain a standard transfer line, and collecting all the standard transfer lines into a standard transfer line set.

In order to solve the above problems, the present invention further provides a loss reduction effect evaluation device for reactive power optimization in a station domain, the device comprising:

The state simulation module is used for acquiring a circuit topological graph of the distribution circuit, extracting a tie line set from the circuit topological graph, and sequentially carrying out tie switch state simulation and topology reconstruction operation on the distribution circuit by utilizing the tie line set to obtain a tie switch state group set;

the loss reduction calculation module is configured to select the tie switch state groups in the tie switch state group set one by one as a target tie switch state group, and calculate a load rate, a loss electric quantity, a line loss rate and a power saving amount of the target tie switch state group, where the calculating the load rate, the loss electric quantity, the line loss rate and the power saving amount of the target tie switch state group respectively includes: selecting the tie switch states in the target tie switch state groups one by one as target tie switch states, acquiring state line parameter groups of each section of line in the target tie switch states, and converging all the state line parameter groups into a state line parameter group set; extracting a state primary active power curve set from the state line parameter set, and calculating the state load rate of the state of the target tie switch by using a preset integral load algorithm and the state primary active power curve set; calculating the state loss electric quantity of the target tie switch state by using the following reactive power loss formula and the state line parameter set:

means that the state loses power, +.>

Refers to->

Personal (S)>

Refers to the total number of said state line parameter sets,/->

Means +.>

Refers to the shapeStatus line parameter set +.>

Means +.>

Line voltage corresponding to the individual state line parameter set, < >>

Means +.>

Line resistances corresponding to the respective state line parameter sets; acquiring a historical energy supply electric quantity and a historical energy consumption electric quantity corresponding to the state of the target tie switch, taking the ratio of the state energy consumption electric quantity to the historical energy supply electric quantity as a state line loss rate, and taking the difference value between the historical energy consumption electric quantity and the state energy consumption electric quantity as a state energy saving electric quantity; integrating all state load rates into the load rate of the target interconnection switch state group, integrating all state loss electric quantity into the loss electric quantity of the target interconnection switch state group, integrating all state line loss rates into the line loss rate of the target interconnection switch state group, and integrating all state electricity saving quantities into the electricity saving quantity of the target interconnection switch state group;

The feature extraction module is used for converging the load rate, the loss electric quantity, the line loss rate and the electricity saving quantity into a target state group electricity consumption feature of the target tie switch state group, and converging all the power consumption features of the target state group into a state group electricity consumption feature set;

the circuit extraction module is used for extracting a standard transfer characteristic group set from the state group power consumption characteristic set and generating a transfer circuit set corresponding to the standard transfer characteristic group set;

and the achievement evaluation module is used for carrying out achievement transfer marking on the transfer line set to obtain a standard transfer line set, extracting a recommended transfer line from the standard transfer line set, and generating a loss reduction evaluation table of the distribution line by utilizing the standard transfer line set and the recommended transfer line.

According to the embodiment of the invention, the connection line set is extracted from the line topological graph by acquiring the line topological graph of the distribution line, connection switch state simulation and topology reconstruction operations are sequentially carried out on the distribution line by utilizing the connection line set to obtain the connection switch state set, various circuit transmission lines and corresponding line states in the distribution circuit of the power grid can be simulated, subsequent route evaluation and electric quantity loss analysis are facilitated, and the load rate, the loss electric quantity, the line loss rate and the electricity saving quantity of the target connection switch state set can be calculated respectively, so that the line loss parameters after transfer under various connection switch states under various line combinations can be calculated, and the subsequent loss reduction effect evaluation is facilitated.

The load rate, the power consumption quantity, the line loss rate and the power saving quantity are integrated into the power consumption characteristics of the target state group of the target contact switch state group, and all the power consumption characteristics of the target state group are integrated into the power consumption characteristics of the state group, so that the order of magnitude of the characteristics can be reduced, the analysis efficiency of subsequent effect analysis is improved, the standard transfer characteristic group set is extracted from the power consumption characteristics of the state group, the transfer line set corresponding to the standard transfer characteristic group set is generated, all the contact lines which are not high in loss, but heavy in load and large in power saving quantity can be integrated into the transfer line set, the line quality is ensured, the transfer line set is marked by transfer effect, the loss reduction effect of each transfer line is clearly displayed, the recommended transfer line is extracted from the standard transfer line set, the loss reduction evaluation table of the distribution line is generated by utilizing the standard transfer line set and the recommended transfer line, the best transfer line can be selected in an auxiliary mode, and the recommended transfer line can be displayed as the overall loss reduction evaluation line, and the overall loss evaluation accuracy of the user can be improved. Therefore, the loss reduction effect evaluation method and device for the reactive power optimization of the station domain can solve the problem of lower accuracy in the process of loss reduction effect evaluation.

Drawings

Fig. 1 is a flow chart of a loss reduction effect evaluation method for reactive power optimization in a station domain according to an embodiment of the present invention;

FIG. 2 is a flow chart illustrating a method for generating a tie switch status set according to an embodiment of the present invention;

FIG. 3 is a flow chart illustrating the generation of a tie switch status set according to an embodiment of the present invention;

FIG. 4 is a functional block diagram of a loss reduction effect evaluation device for reactive power optimization in a station domain according to an embodiment of the present invention;

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

The embodiment of the application provides a loss reduction effect evaluation method for reactive power optimization of a station domain. The execution main body of the loss reduction effect evaluation method for the station domain reactive power optimization comprises, but is not limited to, at least one of a server side, a terminal and the like which can be configured to execute the method provided by the embodiment of the application. In other words, the loss reduction effect evaluation method of the station domain reactive power optimization can be executed by software or hardware installed in a terminal device or a server device, wherein the software can be a blockchain platform. The service end includes but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, and the like. The server may be an independent server, or may be a cloud server that provides cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (Content Delivery Network, CDN), and basic cloud computing services such as big data and artificial intelligence platforms.

Referring to fig. 1, a flow chart of a loss reduction effect evaluation method for reactive power optimization in a station domain according to an embodiment of the invention is shown. In this embodiment, the loss reduction effect evaluation method for reactive power optimization of the station domain includes:

s1, acquiring a line topology diagram of a distribution line, extracting a tie line set from the line topology diagram, and sequentially performing tie switch state simulation and topology reconstruction operation on the distribution line by using the tie line set to obtain a tie switch state group set.

In the embodiment of the invention, the distribution line refers to a line for transmitting power from a step-down transformer substation to a distribution transformer or transmitting power from the distribution transformer substation to a power utilization unit, and the line topology diagram refers to a line topology diagram of a distribution network where an assigned line is located.

In the embodiment of the present invention, the extracting the contact line set from the line topology graph includes:

In detail, the step of extracting the connecting lines from the target line matrix one by one refers to taking a path formed by the directed edges of the target line matrix as the connecting lines, and the connecting lines refer to special wires which play a role in connection between a power plant and a power grid, and can be used for transmitting electric energy generated by the power plant into the power grid and also can be used for transmitting electric energy on the power grid back to the power plant.

In the embodiment of the present invention, referring to fig. 2, the performing, by using the interconnection line set, interconnection switch state simulation and topology reconstruction operations on the distribution line in sequence, to obtain an interconnection switch state group set includes:

s21, selecting the contact lines in the contact line set one by one as target contact lines, and splicing the target contact lines and the distribution lines into a target combined line;

s22, carrying out tie switch state simulation on the target combined line to obtain a primary tie line state group;

s23, performing topology reconstruction on the primary interconnection line state group to obtain an interconnection switch state group;

S24, collecting all the interconnection switch state groups into an interconnection switch state group set.

In the embodiment of the present invention, the step of performing tie switch state simulation on the target combined line to obtain a primary tie line state group refers to closing tie switches between the target combined lines, and using an exhaustion method to simulate tie switch closing conditions between other lines in the distribution line, so as to collect all the states into a primary tie line state.

In detail, referring to fig. 3, the topology reconstruction of the primary tie line state group to obtain a tie switch state group includes:

s31, selecting primary tie line states in the primary tie line state group one by one as target tie line states;

s32, taking a power transformation parent station and a line interconnecting switch of the line in the target interconnecting line state as vertexes, taking the line in the target interconnecting line state as edges, and generating a primary topology state diagram according to all vertexes and all edges;

s33, screening isolated points from the primary topological state diagram to obtain a standard topological state diagram, extracting standard tie switch states from the standard topological state diagram, and converging all the standard tie switch states into a tie switch state group.

In detail, the transformer substation refers to an outgoing station of the distribution line, the interconnection switch refers to a switch installed in an interconnection cabinet and playing an interconnection role, the interconnection switch is mainly used for two power supplies, main control cabinets of two transformers are respectively outgoing lines to the interconnection cabinet in a distribution system of the two transformers, and the interconnection cabinet is mainly used for enabling the distribution group using the power failure system to be electrified by giving the power supply of the outgoing line cabinet of the power failure system to the other power supply system through the interconnection cabinet after the power failure or the power failure of the other system occurs.

In the embodiment of the invention, the connection line set is extracted from the line topological graph by acquiring the line topological graph of the distribution line, and the connection switch state simulation and the topology reconstruction operation are sequentially carried out on the distribution line by utilizing the connection line set to obtain the connection switch state set, so that various circuit transmission lines and corresponding line states in the distribution circuit of the power grid can be simulated, and the subsequent route evaluation and electric quantity consumption analysis are convenient.

S2, selecting the interconnection switch state groups in the interconnection switch state group one by one as target interconnection switch state groups, and respectively calculating the load rate, the loss electric quantity, the line loss rate and the electricity saving quantity of the target interconnection switch state groups.

In the embodiment of the invention, the load rate refers to the percentage between the average active load and the highest active load in a certain time, the load rate is used for measuring the difference degree between the average active load and the highest active load and reflecting one of important technical and economic indexes of whether power supply equipment and electric equipment are fully utilized, the consumed electric quantity refers to the fact that electric energy generated by a generator is transmitted to a user, and through the power transmission equipment, the power transformation equipment and the power distribution equipment, electric quantity loss is generated when the electric energy passes through due to the existence of resistance of the equipment, and the electric energy is scattered in surrounding media in the form of heat energy; in addition, a part of objectively existing management loss is added, and the two parts of electric energy loss form all line loss electric quantity of the power grid, which is called loss electric quantity for short.

In detail, the line loss rate refers to a line loss rate, the line loss rate refers to a percentage of electric energy lost in the electric power network to supply electric energy to the electric power network, the line loss rate is used for checking the economical efficiency of the operation of the electric power system, and the electricity saving amount refers to the electric quantity saved after line adjustment in the electric power network.

In the embodiment of the present invention, the calculating the load rate, the power consumption, the line loss rate and the power saving amount of the target tie switch state group includes:

Selecting the tie switch states in the target tie switch state groups one by one as target tie switch states, acquiring state line parameter groups of each section of line in the target tie switch states, and converging all the state line parameter groups into a state line parameter group set;

extracting a state primary active power curve set from the state line parameter set, and calculating the state load rate of the state of the target tie switch by using a preset integral load algorithm and the state primary active power curve set;

calculating the state loss electric quantity of the target tie switch state by using the following reactive power loss formula and the state line parameter set:

means that the state loses power, +.>

Refers to->

Personal (S)>

Refers to the total number of said state line parameter sets,/->

Means +.>

Means +.>

Root mean square,/or +_ of reactive power corresponding to each status line parameter set >

Means +.>

Line voltage corresponding to the individual state line parameter set, < >>

Means +.>

Line resistances corresponding to the respective state line parameter sets;

acquiring a historical energy supply electric quantity and a historical energy consumption electric quantity corresponding to the state of the target tie switch, taking the ratio of the state energy consumption electric quantity to the historical energy supply electric quantity as a state line loss rate, and taking the difference value between the historical energy consumption electric quantity and the state energy consumption electric quantity as a state energy saving electric quantity;

and integrating all the state load rates into the load rate of the target interconnection switch state group, integrating all the state loss electric quantity into the loss electric quantity of the target interconnection switch state group, integrating all the state line loss rates into the line loss rate of the target interconnection switch state group, and integrating all the state electricity saving quantities into the electricity saving quantity of the target interconnection switch state group.

Specifically, the state line parameter set includes parameters such as active power, reactive power, line voltage, line resistance and the like of each section of line in the state of the target tie switch, the historical functional electric quantity refers to the total power generation of the power outlet station history of the distribution line, and the historical power loss refers to the power loss in the past power transmission process of the distribution line.

In detail, the state loss electric quantity of the target tie switch state is calculated by using the reactive power loss formula and the state line parameter set, so that the line loss electric quantity of each line can be collected into the state loss electric quantity, and the accuracy of calculating the state loss electric quantity is improved.

In detail, the calculating the state load rate of the target tie switch state by using a preset integral load algorithm and the state primary active power curve set includes:

means the status load rate, +.>

Refers to->

Personal (S)>

Means +.f in the state standard power curve set>

Means +.f in the state standard power curve set>

The individual state standard power curve is +.>

Active power corresponding to time, +.>

Is the sign of the maximum value and,

refers to the +.sup.th of the maximum active power concentration of the state>

Individual state maximum active power, +.>

Is a sign of a calculus of the method,

refers toFor->

Is a function of the integral of (a).

In detail, the state load rate of the state of the target tie switch is calculated according to the state maximum active power set and the state standard power curve set by using the integral load algorithm, and the average active power can be determined through the active power at each moment, so that the accuracy of calculating the state load rate is improved.

In the embodiment of the invention, the load rate, the loss electric quantity, the line loss rate and the electricity saving quantity of the target tie switch state group are respectively calculated, so that the line loss parameters after the transfer under various tie switch states under various line combinations can be calculated, thereby facilitating the subsequent evaluation of loss reduction effect.

S3, integrating the load rate, the power consumption, the line loss rate and the power saving amount into a target state group power consumption characteristic of the target tie switch state group, and integrating all the power consumption characteristics of the target state group into a state group power consumption characteristic set.

In the embodiment of the present invention, the aggregating the load factor, the power consumption, the line loss factor, and the power saving amount into the target state group power consumption characteristic of the target tie switch state group includes:

In detail, the state load factor may be normalized to a state load factor characteristic, the state loss power may be normalized to a state loss power characteristic, the state line loss rate may be normalized to a state line loss rate characteristic, and the state power saving may be normalized to a state power saving quantity characteristic by using a normalization function such as softmax or sigmiod.

In the embodiment of the invention, the load rate, the power consumption, the line loss rate and the power saving amount are collected into the power consumption characteristics of the target state group of the target contact switch state group, and the power consumption characteristics of all the target state groups are collected into the power consumption characteristics of the state group, so that the order of magnitude of the characteristics can be reduced, and the analysis efficiency of subsequent effect analysis is improved.

And S4, extracting a standard transfer characteristic set from the power consumption characteristic set of the state set, and generating a transfer circuit set corresponding to the standard transfer characteristic set.

In the embodiment of the present invention, the extracting the standard transfer feature set from the state set power consumption feature set includes:

In detail, the load characteristic threshold may be 0.7 or 0.8, and the line loss characteristic threshold may be 0.2 or 0.3.

Specifically, the generating the transfer line set corresponding to the standard transfer feature set includes:

In detail, the tie line corresponding to the target standard tie switch state refers to the tie line in the target standard tie switch state.

In the embodiment of the invention, the standard transfer characteristic group set is extracted from the state group power consumption characteristic set, and the transfer circuit set corresponding to the standard transfer characteristic group set is generated, so that all the contact circuits which are not high in loss, but heavy in load and large in power saving amount in the area can be screened to be collected into the transfer circuit set, thereby ensuring the circuit quality.

S5, carrying out transfer effect labeling on the transfer line set to obtain a standard transfer line set, extracting recommended transfer lines from the standard transfer line set, and generating a loss reduction evaluation table of the distribution line by utilizing the standard transfer line set and the recommended transfer lines.

In the embodiment of the present invention, the transferring effect labeling of the transferring line set to obtain a standard transferring line set includes:

In detail, the state labeling is performed on the target transfer line by using the state of the tie switch corresponding to the target transfer line, and the obtaining of the state transfer line refers to labeling the open and closed state of the tie switch corresponding to the target transfer line and the opposite line.

Specifically, the step of labeling the target transfer line with the standard transfer feature set corresponding to the target transfer line to obtain the standard transfer line refers to calculating the transfer power quantity, annual energy saving gain and other effect parameters of the target transfer line by using the standard transfer feature set corresponding to the target transfer line, and labeling the target transfer line with all the effect parameters to obtain the standard transfer line.

In detail, the extracting the recommended transfer line from the standard transfer line set refers to selecting the standard transfer line with the largest frequency of occurrence in the standard transfer line set as the recommended transfer line, and the generating the loss reduction evaluation table of the distribution line by using the standard transfer line set and the recommended transfer line set refers to generating various labels of the recommended transfer line set and the standard transfer line set into a result table.

In the embodiment of the invention, the transfer result marking is carried out on the transfer line set to obtain the standard transfer line set, so that the loss reduction effect of each transfer line can be clearly displayed, the recommended transfer line is extracted from the standard transfer line set, and the standard transfer line set and the recommended transfer line are utilized to generate the loss reduction evaluation table of the distribution line, so that the transfer line with the best loss reduction evaluation can be selected as the recommended line in an auxiliary manner, the whole available transfer line is displayed to a user, and the accuracy of the loss reduction effect evaluation is improved.

The load rate, the power consumption quantity, the line loss rate and the power saving quantity are integrated into the power consumption characteristics of the target state group of the target contact switch state group, and all the power consumption characteristics of the target state group are integrated into the power consumption characteristics of the state group, so that the order of magnitude of the characteristics can be reduced, the analysis efficiency of subsequent effect analysis is improved, the standard transfer characteristic group set is extracted from the power consumption characteristics of the state group, the transfer line set corresponding to the standard transfer characteristic group set is generated, all the contact lines which are not high in loss, but heavy in load and large in power saving quantity can be integrated into the transfer line set, the line quality is ensured, the transfer line set is marked by transfer effect, the loss reduction effect of each transfer line is clearly displayed, the recommended transfer line is extracted from the standard transfer line set, the loss reduction evaluation table of the distribution line is generated by utilizing the standard transfer line set and the recommended transfer line, the best transfer line can be selected in an auxiliary mode, and the recommended transfer line can be displayed as the overall loss reduction evaluation line, and the overall loss evaluation accuracy of the user can be improved. Therefore, the loss reduction effect evaluation method for the reactive power optimization of the station domain can solve the problem of lower accuracy in the process of loss reduction effect evaluation.

Fig. 4 is a functional block diagram of a loss reduction effect evaluation device for reactive power optimization in a station domain according to an embodiment of the present invention.

The loss reduction effect evaluation device 100 for station domain reactive power optimization can be installed in electronic equipment. The loss reduction effect evaluation device 100 for reactive power optimization in the station domain may include a state simulation module 101, a loss reduction calculation module 102, a feature extraction module 103, a line extraction module 104, and an effect evaluation module 105 according to the implemented functions. The module of the invention, which may also be referred to as a unit, refers to a series of computer program segments, which are stored in the memory of the electronic device, capable of being executed by the processor of the electronic device and of performing a fixed function.

In the present embodiment, the functions concerning the respective modules/units are as follows:

the state simulation module 101 is configured to obtain a line topology diagram of a distribution line, extract a tie line set from the line topology diagram, and sequentially perform tie switch state simulation and topology reconstruction operations on the distribution line by using the tie line set to obtain a tie switch state set;

the loss reduction calculation module 102 is configured to select, one by one, a tie switch state group in the tie switch state group set as a target tie switch state group, and calculate a load rate, a loss electric quantity, a line loss rate, and a power saving amount of the target tie switch state group, where the calculating the load rate, the loss electric quantity, the line loss rate, and the power saving amount of the target tie switch state group includes: selecting the tie switch states in the target tie switch state groups one by one as target tie switch states, acquiring state line parameter groups of each section of line in the target tie switch states, and converging all the state line parameter groups into a state line parameter group set; extracting a state primary active power curve set from the state line parameter set, and calculating the state load rate of the state of the target tie switch by using a preset integral load algorithm and the state primary active power curve set; calculating the state loss electric quantity of the target tie switch state by using the following reactive power loss formula and the state line parameter set:

means that the state loses power, +.>

Refers to->

Personal (S)>

Refers to the total number of said state line parameter sets,/->

Means +.>

Means +.>

Means +.>

Line voltage corresponding to the individual state line parameter set, < >>

Means +.>

The feature extraction module 103 is configured to aggregate the load factor, the power consumption, the line loss factor, and the power saving amount into a target state group power consumption feature of the target tie switch state group, and aggregate all power consumption features of the target state group into a state group power consumption feature set;

the circuit extracting module 104 is configured to extract a standard transfer feature set from the state group power consumption feature set, and generate a transfer circuit set corresponding to the standard transfer feature set, where the extracting the standard transfer feature set from the state group power consumption feature set includes: the method comprises the steps of selecting state group power consumption characteristics in a state group power consumption characteristic set one by one as target state group power consumption characteristics, taking a load factor characteristic group in the target state group power consumption characteristics as a target load factor characteristic group, and selecting state load factor characteristics in the target load factor characteristic group one by one as target state load factor characteristics; judging whether the load factor characteristic of the target state is smaller than a preset load characteristic threshold value or not; if not, returning to the step of selecting the state load rate characteristics in the target load rate characteristic groups one by one as the target state load rate characteristics; if yes, taking the state line loss rate feature corresponding to the target state load rate feature in the power consumption feature of the target state group as a target state line loss rate feature, and judging whether the target state line loss rate feature is smaller than a preset line loss feature threshold; if not, returning to the step of selecting the state load rate characteristics in the target load rate characteristic groups one by one as the target state load rate characteristics; if so, adding a state power saving quantity feature corresponding to the target state load rate feature in the power consumption feature of the target state group into a primary power saving quantity feature group, and taking the primary power saving quantity feature group as a standard power saving quantity feature group until the target state load rate feature is the last state load rate feature in the target load rate feature group; taking the state power saving quantity characteristic with the largest value in the standard power saving quantity characteristic group as a standard power saving quantity characteristic, collecting the state load rate characteristic, the state line loss rate characteristic and the state loss electric quantity characteristic corresponding to the standard power saving quantity characteristic into a standard transfer characteristic group, and collecting all the standard transfer characteristic groups into a standard transfer characteristic group set;

The achievement evaluation module 105 is configured to perform achievement transfer labeling on the transfer line set to obtain a standard transfer line set, extract a recommended transfer line from the standard transfer line set, and generate a loss reduction evaluation table of the distribution line by using the standard transfer line set and the recommended transfer line.

In detail, each module in the station-domain reactive power optimization loss reduction effect evaluation device 100 in the embodiment of the present invention adopts the same technical means as the station-domain reactive power optimization loss reduction effect evaluation method described in fig. 1 to 3, and can generate the same technical effects, which are not described herein.

In the several embodiments provided in the present invention, it should be understood that the disclosed apparatus, device and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be other manners of division when actually implemented.

The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units can be realized in a form of hardware or a form of hardware and a form of software functional modules.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims shall not be construed as limiting the claim concerned.

The embodiment of the application can acquire and process the related data based on the artificial intelligence technology. Among these, artificial intelligence (Artificial Intelligence, AI) is the theory, method, technique and application system that uses a digital computer or a digital computer-controlled machine to simulate, extend and extend human intelligence, sense the environment, acquire knowledge and use knowledge to obtain optimal results.

Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. Multiple units or means as set forth in the system embodiments may also be implemented by one unit or means in software or hardware. The terms first, second, etc. are used to denote a name, but not any particular order.

Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. The loss reduction effect evaluation method for station domain reactive power optimization is characterized by comprising the following steps of:

s1: acquiring a line topology diagram of a distribution line, extracting a tie line set from the line topology diagram, and sequentially performing tie switch state simulation and topology reconstruction operation on the distribution line by using the tie line set to obtain a tie switch state group set;

s2: selecting the interconnection switch state groups in the interconnection switch state group one by one as target interconnection switch state groups, and respectively calculating the load rate, the loss electric quantity, the line loss rate and the electricity saving quantity of the target interconnection switch state groups, wherein the calculation of the load rate, the loss electric quantity, the line loss rate and the electricity saving quantity of the target interconnection switch state groups comprises the following steps:

S21: selecting the tie switch states in the target tie switch state groups one by one as target tie switch states, acquiring state line parameter groups of each section of line in the target tie switch states, and converging all the state line parameter groups into a state line parameter group set;

s22: extracting a state primary active power curve set from the state line parameter set, and calculating the state load rate of the state of the target tie switch by using a preset integral load algorithm and the state primary active power curve set;

s23: calculating the state loss electric quantity of the target tie switch state by using the following reactive power loss formula and the state line parameter set:

means that the state loses power, +.>

Refers to->

Personal (S)>

Refers to the total number of said state line parameter sets,/->

Means +.>

Means +.>

Means +.>

Line voltage corresponding to the individual state line parameter set, < >>

Means +.>

Line resistances corresponding to the respective state line parameter sets;

s24: acquiring a historical energy supply electric quantity and a historical energy consumption electric quantity corresponding to the state of the target tie switch, taking the ratio of the state energy consumption electric quantity to the historical energy supply electric quantity as a state line loss rate, and taking the difference value between the historical energy consumption electric quantity and the state energy consumption electric quantity as a state energy saving electric quantity;

s25: integrating all state load rates into the load rate of the target interconnection switch state group, integrating all state loss electric quantity into the loss electric quantity of the target interconnection switch state group, integrating all state line loss rates into the line loss rate of the target interconnection switch state group, and integrating all state electricity saving quantities into the electricity saving quantity of the target interconnection switch state group;

s3: the load rate, the power consumption quantity, the line loss rate and the power saving quantity are collected into a target state group power consumption characteristic of the target tie switch state group, and all the target state group power consumption characteristics are collected into a state group power consumption characteristic set;

S4: extracting a standard transfer characteristic set from the state group power consumption characteristic set, and generating a transfer line set corresponding to the standard transfer characteristic set, wherein the extracting the standard transfer characteristic set from the state group power consumption characteristic set comprises the following steps:

s41, selecting state group power consumption characteristics in the state group power consumption characteristic set one by one as target state group power consumption characteristics, taking a load factor characteristic group in the target state group power consumption characteristics as a target load factor characteristic group, and selecting state load factor characteristics in the target load factor characteristic group one by one as target state load factor characteristics;

s42, judging whether the load factor characteristic of the target state is smaller than a preset load characteristic threshold value or not;

s43, if not, returning to the step of selecting the state load rate characteristics in the target load rate characteristic groups one by one as the target state load rate characteristics;

s44, if so, taking a state line loss rate feature corresponding to the target state load rate feature in the power consumption feature of the target state group as a target state line loss rate feature, and judging whether the target state line loss rate feature is smaller than a preset line loss feature threshold;

s45, if not, returning to the step of selecting the state load rate characteristics in the target load rate characteristic groups one by one as the target state load rate characteristics;

S46, if so, adding a state electricity-saving quantity feature corresponding to the target state load rate feature in the power consumption feature of the target state group into a primary electricity-saving quantity feature group, and taking the primary electricity-saving quantity feature group as a standard electricity-saving quantity feature group until the target state load rate feature is the last state load rate feature in the target load rate feature group;

s47, taking the state power saving quantity characteristic with the largest value in the standard power saving quantity characteristic group as a standard power saving quantity characteristic, collecting the state load rate characteristic, the state line loss rate characteristic and the state loss electric quantity characteristic corresponding to the standard power saving quantity characteristic into a standard transfer characteristic group, and collecting all the standard transfer characteristic groups into a standard transfer characteristic group set;

s5: and carrying out transfer effect labeling on the transfer line set to obtain a standard transfer line set, extracting a recommended transfer line from the standard transfer line set, and generating a loss reduction evaluation table of the distribution line by utilizing the standard transfer line set and the recommended transfer line.

2. The method for evaluating loss-reduction performance of reactive power optimization in a station domain according to claim 1, wherein the extracting the tie line set from the line topology graph comprises:

3. The method for evaluating loss reduction performance of reactive power optimization in a station domain according to claim 1, wherein said performing tie switch state simulation and topology reconstruction operations on the distribution lines sequentially by using the tie line set to obtain a tie switch state group set includes:

all tie switch state groups are collected into a tie switch state group set.

4. The method for evaluating loss reduction performance of reactive power optimization in a station domain according to claim 3, wherein the performing topology reconstruction on the primary tie line state group to obtain a tie switch state group includes:

5. The method for evaluating loss-reduction performance of reactive power optimization in a station domain according to claim 1, wherein the calculating the state load factor of the target tie switch state by using a preset integral load algorithm and the state primary active power curve set comprises:

means the status load rate, +.>

Refers to->

Personal (S)>

Refers to the total number of state primary active power curves in the state primary active power curve set, and the total number of the state primary active power curves is equal to the total number of state line parameter sets, +.>

Means +.f in the state standard power curve set>

Refers to the state standard power curveConcentrate on->

The individual state standard power curve is +.>

Active power corresponding to time, +.>

Is the sign of the maximum value and,

refers to the +.sup.th of the maximum active power concentration of the state>

Individual state maximum active power, +. >

Is a sign of a calculus of the method,

refers to pair->

Is a function of the integral of (a).

6. The method for evaluating loss-reduction performance of reactive power optimization in a station domain according to claim 1, wherein the aggregating the load factor, the loss power, the line loss factor, and the power saving amount into a target state group power consumption characteristic of the target tie switch state group comprises:

7. The method for evaluating loss reduction performance of reactive power optimization in a station domain according to claim 1, wherein the generating a transfer line set corresponding to the standard transfer feature set includes:

8. The method for evaluating loss reduction effect of reactive power optimization in a station domain according to claim 1, wherein the step of performing transfer effect labeling on the transfer line set to obtain a standard transfer line set comprises the steps of:

9. Loss reduction effect evaluation device for station domain reactive power optimization, which is characterized by comprising:

means that the state loses power, +.>

Refers to->

Personal (S)>

Refers to the total number of said state line parameter sets,/->

Means +.>

Means +.>

Means +.>

Line voltage corresponding to the individual state line parameter set, < >>

Refers to the state line parameter set/>

the circuit extraction module is configured to extract a standard transfer feature set from the state group power consumption feature set, and generate a transfer circuit set corresponding to the standard transfer feature set, where the extracting the standard transfer feature set from the state group power consumption feature set includes: the method comprises the steps of selecting state group power consumption characteristics in a state group power consumption characteristic set one by one as target state group power consumption characteristics, taking a load factor characteristic group in the target state group power consumption characteristics as a target load factor characteristic group, and selecting state load factor characteristics in the target load factor characteristic group one by one as target state load factor characteristics; judging whether the load factor characteristic of the target state is smaller than a preset load characteristic threshold value or not; if not, returning to the step of selecting the state load rate characteristics in the target load rate characteristic groups one by one as the target state load rate characteristics; if yes, taking the state line loss rate feature corresponding to the target state load rate feature in the power consumption feature of the target state group as a target state line loss rate feature, and judging whether the target state line loss rate feature is smaller than a preset line loss feature threshold; if not, returning to the step of selecting the state load rate characteristics in the target load rate characteristic groups one by one as the target state load rate characteristics; if so, adding a state power saving quantity feature corresponding to the target state load rate feature in the power consumption feature of the target state group into a primary power saving quantity feature group, and taking the primary power saving quantity feature group as a standard power saving quantity feature group until the target state load rate feature is the last state load rate feature in the target load rate feature group; taking the state power saving quantity characteristic with the largest value in the standard power saving quantity characteristic group as a standard power saving quantity characteristic, collecting the state load rate characteristic, the state line loss rate characteristic and the state loss electric quantity characteristic corresponding to the standard power saving quantity characteristic into a standard transfer characteristic group, and collecting all the standard transfer characteristic groups into a standard transfer characteristic group set;