CN114358566A - Line loss management method and device based on topology rectification, storage medium and equipment - Google Patents
Line loss management method and device based on topology rectification, storage medium and equipment Download PDFInfo
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Abstract
The invention provides a line loss management method, a system, a storage medium and equipment based on topology rectification, wherein the method comprises the steps of establishing a topology structure chart according to the equipment distribution relation in a line single line diagram; calculating the theoretical line loss rate of the line according to the topological structure diagram, the equipment parameters and a pre-trained forward-backward substitution load flow calculation model; judging whether the theoretical line loss rate of the line is higher than the standard line loss rate or not; if so, returning and modifying the topological relation and the equipment parameters in the topological structure chart, and recalculating the theoretical line loss rate of the line until the theoretical line loss rate of the line is not higher than the standard line loss rate. According to the line loss management method, system, storage medium and equipment based on topology rectification, whether the theoretical line loss rate of the line is higher than the standard line loss rate or not is judged, and the theoretical line loss rate of the line is reduced by repeatedly correcting the topological relation and the equipment model until the theoretical line loss rate of the line is not higher than the standard line loss rate, so that the economic and energy-saving effects are achieved.
Description
Technical Field
The invention relates to the technical field of theoretical line loss calculation of a distribution line, in particular to a line loss management method, a line loss management device, a line loss storage medium and line loss management equipment based on topology rectification.
Background
With the rapid development of the economy of China, the development pace of the electric power industry of China is gradually accelerated. The power distribution system generates line loss during operation. The line loss refers to the energy loss dissipated in the form of heat energy, namely the active power consumed by resistance and conductance. The theoretical line loss is calculated theoretically according to parameters of power supply equipment, the current operation mode of the power grid, current distribution and load conditions.
Line losses in the distribution system are not converted into useful energy and are wasted. According to statistical data, the line loss rate of a general power distribution network is more than 3%, and the line loss rate can reach 10% or even higher in severe cases. This not only means the loss of electric energy, but also means the waste of a large amount of primary energy and more pollution to the environment. Therefore, the economic loss generated by the line loss of the power distribution system is reflected in each link of power generation, supply and utilization. If no measures are taken to reduce the line loss rate of the power distribution system, the adverse effects on national energy utilization, environmental protection and the economic benefits of enterprises are inevitably generated.
In the prior art, each electric power company usually reduces line loss through strengthening metering management, but in actual operation, the basic reason of line loss is that the overall planning of a power distribution network is unreasonable, the energy consumption of equipment in the power distribution system is high, and the line arrangement is unreasonable, so that the line loss rate of the power distribution network is high, and economic loss is caused.
Disclosure of Invention
Based on the above, the invention aims to provide a line loss management method, device, storage medium and equipment based on topology rectification, and solve the problems of high line loss of a power distribution network and economic loss caused by unreasonable equipment and line arrangement in a power distribution system in the background art.
The invention provides a line loss management method based on topology rectification on one hand, which comprises the following steps:
acquiring a line single line diagram, establishing a topological structure diagram according to the equipment distribution relation in the line single line diagram, and acquiring the topological relation of the topological structure diagram according to the topological structure diagram;
acquiring equipment parameters, and calculating the theoretical line loss rate of the line by combining a pre-trained forward flow generation calculation model according to the topological relation and the equipment parameters;
obtaining a standard line loss rate, and judging whether the theoretical line loss rate of the line is higher than the standard line loss rate or not according to the standard line loss rate;
if so, modifying the topological relation and the equipment parameters by combining the standard line loss rate, acquiring a modified topological structure diagram according to the modified topological relation, returning to execute the acquisition of the equipment parameters according to the modified topological structure diagram and the modified equipment parameters, and calculating the theoretical line loss rate of the line by combining a pre-trained forward-push moisture-replacing flow calculation model according to the topological relation and the equipment parameters until the theoretical line loss rate of the line is not higher than the standard line loss rate.
The line loss management method based on topology rectification comprises the steps of establishing a topological structure diagram through a single line diagram of a power distribution network line, obtaining equipment parameters in the topological structure diagram, calculating a theoretical line loss rate of the line according to a topological relation diagram and the equipment parameters, judging whether the theoretical line loss rate of the line is higher than a standard line loss rate, if so, returning and modifying the topological relation and the equipment model in the topological structure diagram, so that the theoretical line loss rate of the line is reduced, repeatedly modifying the topological relation and the equipment model, and recalculating the theoretical line loss rate of the line until the theoretical line loss rate of the line is not higher than the standard line loss rate, so that the economic and energy-saving effects are achieved, and the problems that the line loss rate of the power distribution network in the background technology is high and economic loss is caused are solved.
Further, the step of acquiring the line single line diagram and establishing the topology structure diagram according to the device distribution relation in the line single line diagram includes:
acquiring a line single line diagram, analyzing the line single line diagram to obtain equipment label information, and establishing a topological model according to the equipment label information;
filtering irrelevant equipment in the topological model, wherein the irrelevant equipment comprises equipment irrelevant to theoretical line loss calculation;
and performing topology sequencing according to the residual devices after filtering, and performing visual display on the sequencing result of the topology sequencing to generate a topology structure chart.
Further, the step of performing topology ranking according to the filtered devices includes:
and acquiring the terminal numbers of the residual devices after filtering, and sequentially performing series connection and sequencing according to the terminal numbers so as to generate a new topological relation between the devices.
Further, the step of obtaining the line single line diagram and establishing the topology structure diagram according to the equipment distribution relation in the line single line diagram includes:
and acquiring the equipment parameters in the topology structure chart and the actual operation parameters of the equipment, and correspondingly correcting the equipment parameters in the topology structure chart according to the actual operation parameters of the equipment.
Further, the step of obtaining equipment parameters, and calculating the theoretical line loss rate of the line by combining a pre-trained forward-backward flow calculation model according to the topological relation and the equipment parameters comprises the following steps:
acquiring equipment parameters and equipment operation data in the topology structure chart;
calculating the current and voltage of the branch circuits and the branch points, and the active power and reactive power of each branch circuit according to a pre-trained forward-backward substitution load flow calculation model;
and calculating the theoretical line loss rate of each line according to the current, the voltage, the active power and the reactive power.
Further, the pre-trained pushback flow calculation model comprises:
acquiring an initialization node voltage and nodes and branches in a topology structure chart;
calculating the current value of each branch according to the voltage of the initialization node and the forward push;
calculating to obtain the voltage value of each node according to the current of each branch circuit in combination with the back substitution;
calculating a voltage correction value according to the voltage values obtained by two adjacent iterations;
judging whether the voltage correction value is smaller than a convergence standard or not;
if yes, stopping calculation and outputting the voltage value of each node.
In another aspect, the present invention provides a line loss management apparatus based on topology rectification, the apparatus comprising:
the device comprises a topological structure chart establishing module, a topological structure chart acquiring module and a control module, wherein the topological structure chart establishing module is used for acquiring a line single line chart, establishing a topological structure chart according to a device distribution relation in the line single line chart and acquiring a topological relation of the topological structure chart according to the topological structure chart;
the theoretical line loss rate calculation module is used for acquiring equipment parameters, and calculating the theoretical line loss rate of the line according to the topological relation and the equipment parameters and in combination with a pre-trained forward-backward substitution load flow calculation model;
the judging module is used for acquiring a standard line loss rate and judging whether the theoretical line loss rate of the line is higher than the standard line loss rate or not according to the standard line loss rate;
the first execution module is used for modifying the topological relation and the equipment parameters by combining the standard line loss rate and acquiring a modified topological structure diagram according to the modified topological relation if the theoretical line loss rate of the line is higher than the standard line loss rate; and returning to execute the step of obtaining the equipment parameters according to the modified topological structure diagram and the modified equipment parameters, and calculating the theoretical line loss rate of the line by combining a pre-trained forward-backward substitution load flow calculation model according to the topological relation and the equipment parameters until the theoretical line loss rate of the line is not higher than the standard line loss rate.
Another aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the line loss management method based on topology rectification as described above.
The invention also provides a data processing device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the line loss management method based on topology rectification.
Drawings
FIG. 1 is a flowchart of a line loss management method based on topology rectification according to a first embodiment of the present invention;
FIG. 2 is a flowchart of a line loss management method based on topology rectification according to a second embodiment of the present invention;
FIG. 3 is a block diagram of a line loss management apparatus based on topology rectification according to a third embodiment of the present invention;
the following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The topological graph is a method of abstracting an entity into "points" regardless of the size and shape thereof, abstracting lines connecting the entities into "lines", and expressing the relationship between the points and the lines in the form of a graph, and the purpose of the topological graph is to study the connection relationship between the points and the lines. A graph representing the relationship between points and lines is called a topological graph.
In a power distribution network, devices in a power distribution system, such as cables, wires, towers, transformers, substations, and the like, are usually abstracted into points or lines, so as to form a topology structure diagram, and connection relationships and layout conditions between the devices can be viewed from the topology structure diagram.
The method comprises the steps of analyzing equipment in a single line diagram by acquiring a line single line diagram of the power distribution network to generate a topological structure diagram of the power distribution network; the method comprises the steps of correcting equipment parameters in a topology structure diagram to ensure that equipment data are consistent with actual operation data; and the theoretical line loss rate of each line is carried out according to the corrected topological structure chart, and the topological relation and the equipment model in the topological structure chart are adjusted according to the calculation result of the theoretical line loss rate, so that the theoretical line loss rate of each line after adjustment reaches the standard, the theoretical line loss of the power distribution network is reduced, and resources are saved.
Example one
Referring to fig. 1, a line loss management method based on topology rectification according to a first embodiment of the present invention is shown, which includes steps S11-S15.
S11, obtaining a line single line diagram, establishing a topological structure diagram according to the equipment distribution relation in the line single line diagram, and obtaining the topological relation of the topological structure diagram according to the topological structure diagram.
The line single line diagram of the power distribution network comprises main line equipment such as cables, leads, towers, transformers, switches, circuit breakers, substations and terrains in the power distribution network, and the main line equipment corresponds to different equipment and is marked as graphs or character labels. The topological structure diagram is drawn mainly based on a line single line diagram, and specifically, the line single line diagram file in the xml format is analyzed according to the label information in the diagram. And acquiring main equipment in the line diagram according to the label, wherein the main equipment comprises equipment such as cables, leads, towers, transformers and the like, and establishing a preliminary topological model. Furthermore, irrelevant equipment irrelevant to theoretical line loss calculation is filtered, wherein the irrelevant equipment comprises a switch, a cable joint, a lightning arrester and the like, and the equipment in the line single line diagram is extracted through the steps of analysis and filtering.
Furthermore, the devices remaining after filtering need to be topologically sorted again because irrelevant devices are removed, so that the accuracy of the line topological relation is ensured, and the accuracy of the theoretical line loss calculation result is further ensured. The topology sequencing specifically comprises the steps of obtaining the terminal numbers of the residual devices after filtering, wherein the terminal numbers of the devices are the arrangement sequence numbers of the devices in a line single line diagram, and the coming and going directions of the devices can be traced. And sequencing the rest equipment in an end-to-end manner according to the terminal numbers of the equipment, and performing series connection reordering at each branch point to ensure that all the equipment are arranged in order without disconnection, so that a new topological relation among the equipment is generated, wherein the topological relation represents the mutual connection relation among the equipment.
After the topology sorting, the sorting result is displayed visually through an Echarts component to generate a topology structure chart, and an add-delete-modify function of the topology structure chart is provided, so that the topological relation of the topology structure chart is adjusted conveniently. And further comparing the generated topology structure diagram with the line single line diagram, and ensuring that the topology relation diagram is consistent with the actual operation mode of the power distribution network.
And S12, acquiring equipment parameters, and calculating the theoretical line loss rate of the line by combining a pre-trained forward-push moisture flow replacement calculation model according to the topological relation and the equipment parameters.
The device parameters include the type and length of the wire, the type and length of the cable, the type of the transformer, the copper loss and the iron loss, and the devices of different types relate to different device parameters, so that the device parameters of each device are obtained in the topological structure diagram.
Comprehensive analysis is carried out on the data acquired by the topological structure diagram, PMS (PMS) machine account data (a production management system), the transformer and metering point information, the acquisition system and the TMR system, and the theoretical line loss rate of the line is calculated and obtained according to a pre-trained forward-push back tidal current calculation model.
And S13, acquiring a standard line loss rate, and judging whether the theoretical line loss rate of the line is higher than the standard line loss rate or not according to the standard line loss rate.
If yes, go to step S14;
if not, step S15 is executed.
And S14, modifying the topological relation and the equipment parameters by combining the standard line loss rate, and acquiring a modified topological structure diagram according to the modified topological relation.
And S15, the theoretical line loss of the output line reaches the standard.
Comparing the calculated theoretical line loss rate of the line with the standard line loss rate, judging whether the theoretical line loss rate of the line is higher than the standard line loss rate, if so, revising the topological relation and the equipment model among the equipment in the topological structure diagram, replacing the equipment model with the equipment with lower loss through changing the sequence among the equipment, returning to the step S12 to execute the step of acquiring the equipment parameters according to the revised topological structure diagram and the revised equipment parameters, calculating the theoretical line loss rate of the line by combining a pre-training forward-backward substitution power flow calculation model according to the topological relation and the equipment parameters, revising the equipment parameters according to the revised equipment model, re-associating the account data, re-acquiring the data to calculate the theoretical line loss rate of the line, further judging whether the theoretical line loss rate of the revised line is higher than the standard line loss rate or not, and continuously revising the topological relation and the equipment model, and recalculating the theoretical line loss rate of the line until the theoretical line loss rate of the line is not higher than the standard line loss rate, and outputting the theoretical line loss of the line to reach the standard, thereby achieving the effects of energy conservation and economy.
In the line theoretical line loss rate calculation process, only small system resources are occupied in the program running process, the requirements on a CPU and a memory are low, automatic calculation and manual calculation can be set, and the method is convenient to implement.
In summary, in the line loss management method based on topology rectification in the above embodiments of the present invention, a topology structure diagram is established through a distribution network line single line diagram, a device parameter in the topology structure diagram is obtained, a theoretical line loss rate of a line is calculated according to a topology relation diagram and the device parameter, and it is determined whether the theoretical line loss rate of the line is higher than a standard line loss rate, if so, the theoretical line loss rate of the line is returned to modify the topology relation and the device model in the topology structure diagram, so as to reduce the theoretical line loss rate of the line, and the theoretical line loss rate of the line is recalculated by repeatedly modifying the topology relation and the device model until the theoretical line loss rate of the line is not higher than the standard line loss rate, so as to achieve an economic and energy-saving effect, and solve the problem of economic loss caused by high line loss rate of the distribution network in the background art.
Example two
Referring to fig. 2, a line loss management method based on topology rectification according to a first embodiment of the present invention is shown, which includes steps S21-S27.
S21, obtaining a line single line diagram, establishing a topological structure diagram according to the equipment distribution relation in the line single line diagram, and obtaining the topological relation of the topological structure diagram according to the topological structure diagram.
The line single line diagram of the power distribution network comprises main line equipment such as cables, leads, towers, transformers, switches, circuit breakers, substations and terrains in the power distribution network, and the main line equipment corresponds to different equipment and is marked as graphs or character labels. The topological structure diagram is drawn mainly based on a line single line diagram, and specifically, the line single line diagram file in the xml format is analyzed according to the label information in the diagram. And acquiring main equipment in the line diagram according to the label, wherein the main equipment comprises equipment such as cables, leads, towers, transformers and the like, and establishing a preliminary topological model. Furthermore, irrelevant equipment irrelevant to theoretical line loss calculation is filtered, wherein the irrelevant equipment comprises a switch, a cable joint, a lightning arrester and the like, and the equipment in the line single line diagram is extracted through the steps of analysis and filtering.
Further, the remaining devices after filtering need to be topologically ordered because irrelevant devices are removed, so that all the devices are connected in series. The topological sorting specifically comprises the steps of obtaining the terminal numbers of the residual filtered equipment, wherein the terminal numbers of the equipment are the arrangement sequence numbers of the equipment in a line single-line graph, and the incoming and the trend of the equipment can be traced. And sequencing the rest equipment in an end-to-end manner according to the terminal numbers of the equipment, and performing series connection reordering at each branch point to ensure that the equipment is orderly arranged without disconnection, so that a new topological relation between the equipment is generated, wherein the topological relation represents the mutual relation between the equipment.
After the topology sorting, the sorting result is displayed visually through an Echarts component to generate a topology structure chart, and an add-delete-modify function of the topology structure chart is provided, so that the topological relation of the topology structure chart is adjusted conveniently. And further comparing the generated topology structure diagram with the line single line diagram, and ensuring that the topology relation diagram is consistent with the actual operation mode of the power distribution network.
And S22, acquiring equipment parameters, and calculating the theoretical line loss rate of the line by combining a pre-trained forward-push moisture flow replacement calculation model according to the topological relation and the equipment parameters.
The device parameters include the type and length of the wire, the type and length of the cable, the type of the transformer, the copper loss and the iron loss, and the devices of different types relate to different device parameters, so that the device parameters of each device are obtained in the topological structure diagram. And each equipment parameter is added and corrected according to the equipment parameter when the equipment actually runs, so that the data for calculating the theoretical line loss of the line is reliable and effective.
And S23, establishing a pre-trained forward-backward flow calculation model.
The pre-trained push-back flow calculation model comprises the following steps:
1) and acquiring nodes and branches in the topology structure chart, and forming a layer structure according to the relationship between the nodes and the branches.
2) Initializing the node voltage:
in the formula
Node voltage No. 0, i.e., the root node voltage.
3) And (5) forward calculation. Calculating each branch current according to the characteristics of the distribution network radial distribution feeder and the branch current which should be added to the upstream node from the end of the injection current, namely firstly calculating the node injection current:
where i is the node number and k represents the kth iteration. The current of the branch is then calculated using the following formula:
wherein node j is the parent node of node i, and D is the set of child nodes of node i;
4) and (5) carrying out back substitution calculation. And the voltage drop calculation branch is obtained by a hierarchical structure according to a method of a previous path current, and the voltage of each node is calculated as follows:
wherein node j is the parent node of node i, ZijIs the branch impedance.
5) And calculating a node voltage correction value. Recalculating the voltage value of each node according to the formula for calculating the voltage of each node, performing the next iteration by using the recalculated voltage value, and calculating the corrected value of the voltage according to the calculated values of the voltage values obtained by two adjacent calculations:
ΔVj(1)＝max{|Vj(1)-Vj(0)|}
in the formula, Δ Vj(1) Is the voltage correction of node j, Vj(1) Is the new value of the iterative voltage of node j, Vj(0) Is the initial voltage value of the node j;
6) and judging whether convergence occurs or not. Judgment of Δ Vj(1) And if the voltage value is smaller than the convergence standard epsilon, stopping calculation and outputting the voltage value of each node.
And S24, acquiring a standard line loss rate, and judging whether the theoretical line loss rate of the line is higher than the standard line loss rate or not according to the standard line loss rate.
And associating the equipment accounts according to the sequence in the topological structure diagram, and acquiring the accounts and the operation data of the equipment to calculate the theoretical line loss, wherein the equipment accounts comprise equipment parameters. And calculating according to the pre-trained forward-backward flow calculation model.
And obtaining operation data, wherein the operation data comprises 96 point data of the distribution outlet line voltage, 96 point data of the public-private variable active and reactive power and initial voltage 10 KV.
The first forward (0 time data calculation) is calculated from the end distribution transformer to the supply side.
The distribution transformer load is active + j reactive;
distribution loss ((active square + reactive square)/initial voltage square) (+ j reactance)/1000;
segment current (only distribution transformer at the tail end of the segment) (active-j reactive + total loss real part of the distribution transformer-j total loss imaginary part of the distribution transformer)/initial voltage;
the line segment current (distribution transformer line segment + independent line segment) is the distribution transformer line segment current + independent line segment current;
load at the end of a line segment (only distributed transformation at the end of the line segment) is distributed transformation load + distributed transformation loss + no-load loss (iron loss);
the load at the tail end of the line segment (distribution transformer line segment + independent line segment) is the distribution transformer load + distribution transformer loss + no-load loss + the load at the head segment of the independent line segment;
segment loss ((real part of segment end load squared + imaginary part of segment end load squared)/square of initial voltage) × (segment resistance + j × segment reactance)/1000;
loading at the head end of the line segment, namely loading at the tail end of the line segment and line segment loss;
the first iteration back (0 time data calculation),
line segment head voltage (belonging to the power supply side) ═ power supply side node voltage: 10.4 (kV);
segment head voltage (segment node) is the last segment end voltage;
segment voltage difference is segment current (resistance + j reactance)/1000;
segment end voltage (vector representation) is segment head voltage-segment voltage difference;
segment end voltage (vector representation) real part squared + segment end voltage (vector representation) imaginary part squared) squared;
and (3) calculating the result:
the power supply active load is the active load at the head end of the first line section;
the power supply reactive load is the first-end reactive load of the first line section;
power supply quantity active electric quantity is added to power supply active load time point 15/60;
the power supply amount reactive power quantity is added to power supply reactive load time points by 15/60;
the theoretical power supply amount is the active power amount of the power supply amount;
the specific variable theoretical electric quantity is 96 points of specific variable active power/4;
the common variable theoretical electric quantity is 96 points of common variable active power/4;
the electricity selling quantity is the public variable theoretical electricity quantity + the public variable copper loss electricity quantity + the public variable iron loss electricity quantity + the special variable theoretical electricity quantity;
summing the copper loss and the common variable copper loss;
summing the iron loss and the common variable iron loss electric quantity;
summing line loss and line segment loss electric quantity;
the line loss rate is the line loss/power supply load.
In other alternative embodiments, the theoretical line loss rate of the line can also be calculated by an equivalent electric quantity method, a loop method and the like.
And S25, acquiring a standard line loss rate, and judging whether the theoretical line loss rate of the line is higher than the standard line loss rate or not according to the standard line loss rate.
If yes, go to step S26;
if not, step S27 is executed.
And S26, modifying the topological relation and the equipment parameters by combining the standard line loss rate, and acquiring a modified topological structure diagram according to the modified topological relation.
And S27, the theoretical line loss of the output line reaches the standard.
And comparing the calculated theoretical line loss rate of the line with the standard line loss rate, judging whether the theoretical line loss rate of the line is higher than the standard line loss rate, if so, revising the topological relation and the equipment model among the equipment in the topological structure chart, and revising the equipment parameters according to revised equipment models by changing the sequence among the equipment or replacing the equipment model with lower-loss equipment.
Returning to the step S22, re-associating the ledger data according to the modified topological structure diagram, re-acquiring data, calculating the theoretical line loss rate of the line, further judging whether the modified theoretical line loss rate of the line is higher than the standard line loss rate, and outputting the theoretical line loss of the line to reach the standard by continuously modifying the topological relation and the equipment model until the theoretical line loss rate of the line is not higher than the standard line loss rate, so that the energy-saving and economic effects are achieved.
In the line theoretical line loss rate calculation process, only small system resources are occupied in the program running process, the requirements on a CPU and a memory are low, automatic calculation and manual calculation can be set, and the method is convenient to implement.
In summary, in the line loss management method based on topology rectification in the above embodiments of the present invention, a topology structure diagram is established through a distribution network line single line diagram, a device parameter in the topology structure diagram is obtained, a theoretical line loss rate of a line is calculated according to a topology relation diagram and the device parameter, and it is determined whether the theoretical line loss rate of the line is higher than a standard line loss rate, if so, the theoretical line loss rate of the line is returned to modify the topology relation and the device model in the topology structure diagram, so as to reduce the theoretical line loss rate of the line, and the theoretical line loss rate of the line is recalculated by repeatedly modifying the topology relation and the device model until the theoretical line loss rate of the line is not higher than the standard line loss rate, so as to achieve an economic and energy-saving effect, and solve the problem of economic loss caused by high line loss rate of the distribution network in the background art.
EXAMPLE III
In another aspect, the present invention further provides a line loss management apparatus based on topology rectification, referring to fig. 3, which is shown as the line loss management apparatus based on topology rectification, and the apparatus includes:
the system comprises a topological structure diagram establishing module, a line single line diagram generating module and a line single line diagram generating module, wherein the topological structure diagram establishing module is used for acquiring a line single line diagram, establishing a topological structure diagram according to an equipment distribution relation in the line single line diagram and acquiring a topological relation of the topological structure diagram according to the topological structure diagram;
the theoretical line loss rate calculation module is used for acquiring equipment parameters, and calculating the theoretical line loss rate of the line according to the topological relation and the equipment parameters and in combination with a pre-trained forward-backward substitution load flow calculation model;
the judging module is used for acquiring a standard line loss rate and judging whether the theoretical line loss rate of the line is higher than the standard line loss rate or not according to the standard line loss rate;
the first execution module is used for modifying the topological relation and the equipment parameters by combining the standard line loss rate and obtaining a modified topological structure diagram according to the modified topological relation if the theoretical line loss rate of the line is higher than the standard line loss rate; and returning to execute and obtain the equipment parameters according to the modified topological structure diagram and the modified equipment parameters, and calculating the theoretical line loss rate of the line by combining a pre-trained forward-push moisture flow calculation model according to the topological relation and the equipment parameters until the theoretical line loss rate of the line is not higher than the standard line loss rate.
Further, in some other optional embodiments, the topology structure diagram building module includes:
the topological model establishing unit is used for acquiring a line single line diagram, analyzing the line single line diagram to obtain equipment label information and establishing a topological model according to the equipment label information;
the filtering unit is used for filtering irrelevant devices in the topological model, and the irrelevant devices comprise devices irrelevant to theoretical line loss calculation;
and the topology structure chart generating unit is used for carrying out topology sequencing according to the filtered residual equipment and visually displaying the sequencing result of the topology sequencing to generate the topology structure chart.
Further, in some other optional embodiments, the topology structure diagram generating unit includes:
and the topology sequencing subunit is used for acquiring the terminal numbers of the residual devices after filtering, and sequentially performing series connection and sequencing according to the terminal numbers so as to generate a new topology relationship between the devices.
Further, in some other optional embodiments, the apparatus further comprises,
and the data correction unit is used for acquiring the equipment parameters in the topology structure chart and the actual operation parameters of the equipment, and correspondingly correcting the equipment parameters in the topology structure chart according to the actual operation parameters of the equipment.
Further, in some other optional embodiments, the theoretical line loss rate calculation module further includes:
the data acquisition unit is used for acquiring the equipment parameters and the equipment operation data in the topology structure chart;
the load flow calculation unit is used for calculating the current and the voltage of the branch circuits and the branch points, and the active power and the reactive power of each branch circuit according to the pre-trained forward-backward substitution load flow calculation model;
and the theoretical line loss calculating unit is used for calculating the theoretical line loss rate of each line according to the current, the voltage, the active power and the reactive power.
Further, in some other optional embodiments, the power flow calculation unit includes,
the convergence calculating subunit is used for acquiring an initialization node voltage and nodes and branches in the topology structure chart;
calculating the current value of each branch according to the voltage of the initialization node and forward calculation;
calculating to obtain the voltage value of each node according to the current of each branch circuit in combination with the back substitution;
calculating a voltage correction value according to the voltage values obtained by two adjacent iterations;
determining whether the voltage correction value is less than a convergence criterion,
if yes, stopping calculation and outputting the voltage value of each node.
The functions or operation steps of the modules and units when executed are substantially the same as those of the method embodiments, and are not described herein again.
In summary, in the line loss management device based on topology rectification in the above embodiments of the present invention, the topology structure diagram is established through the distribution network line single line diagram, the device parameter in the topology structure diagram is obtained, the theoretical line loss rate of the line is calculated according to the topology structure diagram and the device parameter, and it is determined whether the theoretical line loss rate of the line is higher than the standard line loss rate, if so, the topology structure and the device model in the topology structure diagram are modified, so as to reduce the theoretical line loss rate of the line, and the theoretical line loss rate of the line is recalculated by repeatedly correcting the topology structure and the device model until the theoretical line loss rate of the line is not higher than the standard line loss rate, so as to achieve the economic and energy-saving effect, and solve the problem of economic loss caused by high line loss rate of the distribution network in the background technology.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the line loss management method based on topology rectification in the foregoing embodiment.
Example four
The invention further provides a line loss management system based on topology rectification, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the line loss management method based on topology rectification in the embodiment. In some embodiments, the processor may be an Electronic Control Unit (ECU), a Central Processing Unit (CPU), a controller, a microcontroller, a microprocessor or other data processing chip, and is configured to run program codes stored in the memory or process data, such as executing an access restriction program.
Wherein the memory includes at least one type of readable storage medium including flash memory, hard disks, multimedia cards, card-type memory (e.g., SD or DX memory, etc.), magnetic memory, magnetic disks, optical disks, etc. The memory may in some embodiments be an internal storage unit of the vehicle, for example a hard disk of the vehicle. The memory may also be an external storage device of the vehicle in other embodiments, such as a plug-in hard drive provided on the vehicle, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash memory card (FlashCard), and the like. Further, the memory may also include both an internal storage unit and an external storage device of the vehicle. The memory may be used not only to store application software installed in the vehicle and various types of data, but also to temporarily store data that has been output or is to be output.
In summary, in the line loss management system based on topology rectification in the above embodiment of the present invention, the topology structure diagram is established through the distribution network line single line diagram, the device parameter in the topology structure diagram is obtained, the theoretical line loss rate of the line is calculated according to the topology relation diagram and the device parameter, and it is determined whether the theoretical line loss rate of the line is higher than the standard line loss rate, if so, the topology relation and the device model in the topology structure diagram are modified, so as to reduce the theoretical line loss rate of the line, and the theoretical line loss rate of the line is not higher than the standard line loss rate by repeatedly modifying the topology relation and the device model, so that the economic and energy-saving effects are achieved, and the problem of economic loss caused by high line loss rate of the distribution network in the background art is solved.
The logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as a sequential list of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A line loss management method based on topology rectification is characterized by comprising the following steps:
acquiring a line single line diagram, establishing a topological structure diagram according to the equipment distribution relation in the line single line diagram, and acquiring the topological relation of the topological structure diagram according to the topological structure diagram;
acquiring equipment parameters, and calculating the theoretical line loss rate of the line by combining a pre-trained forward-backward flow calculation model according to the topological relation and the equipment parameters;
obtaining a standard line loss rate, and judging whether the theoretical line loss rate of the line is higher than the standard line loss rate or not according to the standard line loss rate;
if so, modifying the topological relation and the equipment parameters by combining the standard line loss rate, and acquiring a modified topological structure diagram according to the modified topological relation; and returning to execute the acquisition of the equipment parameters according to the modified topological structure diagram and the modified equipment parameters, and calculating the theoretical line loss rate of the line by combining a pre-trained forward-backward flow calculation model according to the topological relation and the equipment parameters until the theoretical line loss rate of the line is not higher than the standard line loss rate.
2. The line loss management method based on topology rectification according to claim 1, wherein the step of obtaining a line single line diagram and establishing a topology structure diagram according to a device distribution relationship in the line single line diagram includes:
acquiring a line single line diagram, analyzing the line single line diagram to obtain equipment label information, and establishing a topological model according to the equipment label information;
filtering irrelevant equipment in the topological model, wherein the irrelevant equipment comprises equipment irrelevant to theoretical line loss calculation;
and carrying out topology sequencing according to the residual filtered equipment, and visually displaying the sequencing result of the topology sequencing to generate a topology structure chart.
3. The line loss management method based on topology rectification according to claim 2, wherein the step of performing topology sequencing according to the filtered devices comprises:
and acquiring the terminal numbers of the residual devices after filtering, and sequentially performing series connection and sequencing according to the terminal numbers to generate a new topological relation between the devices.
4. The line loss management method based on topology rectification according to claim 1, wherein the step of obtaining a line single line diagram and establishing a topology structure diagram according to the device distribution relationship in the line single line diagram comprises:
and acquiring the equipment parameters in the topology structure chart and the actual operation parameters of the equipment, and correspondingly correcting the equipment parameters in the topology structure chart according to the actual operation parameters of the equipment.
5. The line loss management method based on topology rectification according to claim 4, wherein the step of obtaining the equipment parameters, calculating the theoretical line loss rate of the line by combining a pre-trained forward-backward substitution power flow calculation model according to the topology relation and the equipment parameters comprises:
acquiring equipment parameters and equipment operation data in the topology structure chart;
calculating the current and voltage of the branch circuits and the branch points, and the active power and reactive power of each branch circuit according to a pre-trained forward-backward substitution load flow calculation model;
and calculating the theoretical line loss rate of each line according to the current, the voltage, the active power and the reactive power.
6. The line loss management method based on topology rectification according to claim 5, wherein the pre-trained push-back power flow calculation model comprises:
acquiring an initialization node voltage and nodes and branches in the topology structure chart;
calculating the current value of each branch according to the voltage of the initialization node and forward calculation;
calculating to obtain the voltage value of each node according to the current of each branch circuit in combination with the back substitution;
calculating a voltage correction value according to the voltage values obtained by two adjacent iterations;
judging whether the voltage correction value is smaller than a convergence standard or not;
if yes, stopping calculation and outputting the voltage value of each node.
7. A line loss management system based on topology rectification is characterized in that the device comprises:
the system comprises a topological structure chart establishing module, a line single line chart acquiring module and a line single line chart acquiring module, wherein the topological structure chart establishing module is used for acquiring a topological relation of a line single line chart according to a device distribution relation in the line single line chart and acquiring a topological structure chart according to the topological structure chart;
the theoretical line loss rate calculation module is used for acquiring equipment parameters, and calculating the theoretical line loss rate of the line by combining a pre-trained forward-backward flow calculation model according to the topological relation and the equipment parameters;
the judging module is used for acquiring a standard line loss rate and judging whether the theoretical line loss rate of the line is higher than the standard line loss rate or not according to the standard line loss rate;
the first execution module is used for modifying the topological relation and the equipment parameters by combining the standard line loss rate and acquiring a modified topological structure diagram according to the modified topological relation if the theoretical line loss rate of the line is higher than the standard line loss rate; and returning to execute the acquisition of the equipment parameters according to the modified topological structure diagram and the modified equipment parameters, and calculating the theoretical line loss rate of the line by combining a pre-trained forward-backward flow calculation model according to the topological relation and the equipment parameters until the theoretical line loss rate of the line is not higher than the standard line loss rate.
8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements a method for topology-based deskew line loss management according to any one of claims 1 to 6.
9. A data processing apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements a method of topology based deskew line loss management as claimed in any of claims 1-6.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114971388A (en) * | 2022-06-20 | 2022-08-30 | 山东安能信息技术有限公司 | Power distribution network line loss fine management system based on big data |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114971388A (en) * | 2022-06-20 | 2022-08-30 | 山东安能信息技术有限公司 | Power distribution network line loss fine management system based on big data |
| CN114971388B (en) * | 2022-06-20 | 2023-06-13 | 山东安能信息技术有限公司 | Power distribution network line loss fine management system based on big data |
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