A distribution network comprehensive strategy loss reduction decision method and system

Abstract

The present invention relates to the technical field of loss reduction decision-making, and specifically discloses a distribution network comprehensive strategy loss reduction decision-making method and system, the method comprising: obtaining distribution network operation line loss data and distribution network operation voltage loss data, establishing a line loss coefficient model based on the line loss data, performing loss analysis, and accordingly performing line loss reduction processing on the distribution network, and outputting a line loss reduction plan; at the same time, establishing a voltage loss coefficient model based on the voltage loss data, similarly performing loss analysis, and outputting a voltage loss reduction plan; finally, combining the line loss coefficient and the voltage loss coefficient, analyzing the comprehensive loss index of the distribution network, dividing the loss levels, and outputting a comprehensive loss reduction plan; through data analysis, evaluating the loss situation of the distribution network, and proposing targeted loss reduction strategies, effectively improving the operation efficiency of the distribution network, and providing strong support for the intelligent management and optimization of the distribution network.

Description

Technical Field

[0001] The present invention relates to the technical field of loss reduction decision-making, and in particular to a distribution network comprehensive strategy loss reduction decision-making method and system. Background Art

[0002] The distribution network is the power network that receives electricity from the transmission grid or regional power plants and distributes it locally or step-by-step to various users through distribution facilities. It is the portion of the power system directly connected to users and is primarily responsible for the distribution and transmission of electricity, ensuring a stable and reliable power supply. As a key component of the power system, the operating efficiency and economic efficiency of the distribution network have a crucial impact on the overall performance of the power system. However, with the continuous growth of electricity demand and the increasing complexity of the power grid structure, losses in the distribution network have become increasingly severe, becoming a major factor restricting the improvement of the grid's economic performance and operational efficiency. Therefore, how to effectively reduce losses in the distribution network and improve the grid's economic performance and operational efficiency has become a critical issue that needs to be addressed in the power industry.

[0003] Traditional loss reduction decision-making methods for integrated distribution network strategies primarily rely on traditional technical approaches and methods. While these methods can reduce losses to a certain extent, they suffer from numerous limitations. First, traditional methods monitor and analyze distribution network losses through simple statistical analysis. However, this approach lacks in-depth data analysis and model prediction, making it difficult to accurately identify and effectively address loss issues. Second, traditional methods often focus solely on line losses or voltage losses, lacking comprehensive analysis of both. This makes it difficult to comprehensively assess distribution network operating losses, fails to categorize the comprehensive loss index of distribution networks, and lacks refined loss reduction methods. Furthermore, existing distribution network loss reduction technologies often employ single technical approaches, such as optimizing grid structure and improving equipment efficiency. While these methods can reduce losses to a certain extent, they struggle to adapt to the loss reduction needs of diverse scenarios, resulting in unsatisfactory loss reduction results. The lack of systematic management methods hinders the full implementation of loss reduction efforts. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a distribution network comprehensive strategy loss reduction decision-making method and system to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a distribution network comprehensive strategy loss reduction decision-making method, comprising the following steps:

[0006] Step S1: Acquire comprehensive data on distribution network operation losses, wherein the comprehensive data includes distribution network operation line loss data and distribution network operation voltage loss data;

[0007] Step S2: Based on the acquired distribution network operation line loss data, a line loss coefficient model is established to calculate the distribution network line loss coefficient, and loss analysis is performed on the distribution network line loss coefficient;

[0008] Step S3: performing line loss reduction processing on the distribution network according to the loss analysis result of step S2, evaluating and analyzing the line loss of the distribution network after the loss reduction, and outputting a line loss reduction plan;

[0009] Step S4: Based on the obtained distribution network operation voltage loss data, a voltage loss coefficient model is established to calculate the distribution network voltage loss coefficient, and loss analysis is performed on the distribution network voltage loss coefficient;

[0010] Step S5: performing voltage loss reduction processing on the distribution network according to the loss analysis result of step S4, evaluating and analyzing the voltage loss of the distribution network after the loss reduction, and outputting a voltage loss reduction plan;

[0011] Step S6: Analyze the comprehensive loss index of the distribution network based on the line loss coefficient and the voltage loss coefficient of the distribution network, classify the comprehensive loss index of the distribution network into loss levels, and output a comprehensive loss reduction plan for the distribution network.

[0012] Preferably, in step S2, the calculation steps of establishing a line loss coefficient model to calculate the distribution network line loss coefficient are specifically as follows:

[0013] Step S21: Calculate the line loss factor LF of the distribution network. The calculation model is as follows:

[0014] Where Lr represents the load rate of the distribution network line, P avg Expressed as the average load of the line, P max It is expressed as the maximum load of the line, and k is expressed as a constant;

[0015] Step S22: Calculate the electric energy loss EL caused by the resistance of the distribution network components. The specific calculation model is:

[0016] EL=3×(I max ) 2 ×LF×R×t×10 -3 , where I max It is represented by the maximum current passing through the distribution network components, LF is represented by the line loss factor of the distribution network, R is represented by the resistance of the distribution network components, and t is represented by the operating time of the distribution network line;

[0017] Step S23: Calculate the distribution network line loss coefficient LLC. The specific calculation model is:

[0018] Among them, LLC represents the line loss coefficient of the distribution network, Tw represents the temperature of the distribution network conductor, T max It is represented by the maximum temperature allowed to pass through the distribution network conductor, LF is represented by the line loss factor of the distribution network, EL is represented by the power loss caused by the resistance of the distribution network components, and Llr is represented by the line loss rate, where: ps represents the power supply of the distribution network, es represents the power sales of the distribution network, and e represents a natural constant;

[0019] The specific contents of the loss analysis of the distribution network line loss coefficient are as follows:

[0020] The distribution network line loss coefficient is extracted and compared with the preset line loss threshold. If the distribution network line loss coefficient is less than or equal to the preset line loss threshold, it is determined that the distribution network line loss is normal, that is, within the predetermined line loss range, indicating that no loss reduction processing is required, and the step loop is jumped out; if the distribution network line loss coefficient is greater than the preset line loss threshold, it is determined that the distribution network line loss is abnormal, and step S3 is further executed to perform loss reduction processing.

[0021] Preferably, in step S3, the specific content of performing line loss reduction processing on the distribution network according to the loss analysis result of step S2 is:

[0022] The line loss of the distribution network is reduced by replacing the conductors. The loss reduction percentage after replacing the conductors is: Where R1 represents the resistance of the wire before the wire is replaced, and R2 represents the resistance of the wire after the wire is replaced;

[0023] After replacing the distribution network conductors, the power loss and energy saving are: Wherein, Lq represents the actual power loss before the distribution network conductor is replaced.

[0024] Preferably, in step S3, the specific content of evaluating and analyzing the distribution network line loss after loss reduction is: based on the loss reduction and energy saving ΔQ after replacing the distribution network conductors, analyzing the distribution network line loss deviation index λ1 after loss reduction, specifically: ΔQ0 represents the preset maximum loss reduction and power saving. If λ1 is less than or equal to the preset threshold A, it is determined that the loss reduction treatment method for the distribution network line loss is reasonable and ideal, and the current loss reduction treatment scheme is determined as the optimal line loss reduction scheme, and the optimal line loss reduction scheme is output. Otherwise, step S3 is looped again, the loss reduction treatment is performed again, and the loss reduction results are evaluated to find the optimal line loss reduction scheme.

[0025] Preferably, in step S3, the calculation step of the distribution network voltage loss coefficient is specifically as follows:

[0026] Step S41: Calculate the distribution network line current factor ICF. The calculation model is as follows:

[0027] Among them, AP represents the active power of the distribution network line, RP represents the reactive power of the distribution network line, and U y It represents the effective value of the line voltage during normal operation specified in the design of the distribution network line;

[0028] Step S42: Calculate the voltage drop longitudinal component Uc. The calculation model is as follows:

[0029] in, Expressed as the active power proportional factor, Expressed as the reactive power proportional factor, Rl represents the resistance of the distribution network line, and X represents the reactance of the distribution network line;

[0030] Step S43: Calculate the voltage loss coefficient VLC of the distribution network. The calculation model is as follows:

[0031] Among them, VLC represents the voltage loss coefficient of the distribution network, and Uc represents the longitudinal component of the voltage drop;

[0032] The specific contents of the loss analysis of the voltage loss coefficient of the distribution network are as follows:

[0033] The distribution network voltage loss coefficient is extracted and compared with the preset voltage loss threshold. If the distribution network voltage loss coefficient is less than or equal to the preset voltage loss threshold, it is determined that the distribution network voltage loss is normal, that is, within the predetermined voltage loss range, indicating that no loss reduction treatment is required, and the step loop is jumped out; if the distribution network voltage loss coefficient is greater than the preset voltage loss threshold, it is determined that the distribution network voltage loss is abnormal, and step S5 is further executed to perform loss reduction treatment.

[0034] Preferably, in step S5, the specific content of performing voltage loss reduction processing on the distribution network according to the loss analysis result of step S4 is:

[0035] The voltage loss of the distribution network is reduced by boosting and reducing the voltage of the distribution network. The specific contents are as follows:

[0036] Boost the distribution network: the loss percentage ΔL after boosting the distribution network is: Among them, U N1 It is the rated voltage of the distribution network before boosting, U N2 It represents the rated voltage of the distribution network after voltage boosting;

[0037] The amount of energy saved by reducing losses after the distribution network voltage is boosted is: Among them, Le represents the power loss before the distribution network is boosted;

[0038] The distribution network is subjected to voltage reduction: the voltage reduction change percentage ΔS is: Among them, U S1 It is the bus voltage before the distribution network is stepped down, U S2 It represents the bus voltage after the distribution network is stepped down;

[0039] The energy saving ΔB after the distribution network voltage is reduced is:

[0040] Preferably, in step S5, the specific content of evaluating and analyzing the voltage loss of the distribution network after loss reduction is: analyzing the voltage loss deviation index λ2 of the distribution network after loss reduction based on the loss saving amount ΔA after the distribution network voltage is boosted and the loss saving amount ΔB after the distribution network voltage is lowered, specifically:

[0041] ΔA0 represents the maximum loss reduction and energy saving of the preset boost processing, ΔB0 represents the maximum loss reduction and energy saving of the preset buck processing, w1 and w2 represent the weights of the loss reduction and energy saving after the distribution network boosts and bucks, respectively, and w1+w2=1.

[0042] Preferably, in step S6, the specific content of classifying the comprehensive loss index of the distribution network into loss levels is as follows: the specific content of classifying the comprehensive loss index of the distribution network into loss levels is as follows: comparing the comprehensive loss index of the distribution network with the preset comprehensive loss thresholds respectively; if the comprehensive loss index of the distribution network is less than the first preset comprehensive loss threshold, determining that the comprehensive loss of the distribution network belongs to a low loss level; if the comprehensive loss index of the distribution network is between the first preset comprehensive loss threshold and the second preset comprehensive loss threshold, determining that the comprehensive loss of the distribution network belongs to a medium loss level; if the comprehensive loss index of the distribution network is between the second preset comprehensive loss threshold and the third preset comprehensive loss threshold, determining that the comprehensive loss of the distribution network belongs to a high loss level; and formulating loss reduction plans for distribution networks of different loss levels to form a distribution network loss level loss reduction plan;

[0043] Based on the distribution network loss level loss reduction plan, the distribution network line loss loss reduction plan output in step S3 and the distribution network voltage loss loss reduction plan output in step S5, a comprehensive distribution network loss reduction plan is formed and output.

[0044] To achieve the above objectives, the present invention provides the following technical solutions: a distribution network comprehensive strategy loss reduction decision system, which implements the above distribution network comprehensive strategy loss reduction decision method, comprising:

[0045] Distribution network loss data acquisition module: acquires comprehensive data on distribution network operation losses, including distribution network operation line loss data and distribution network operation voltage loss data;

[0046] Line loss data calculation module: based on the acquired distribution network operation line loss data, establishes a line loss coefficient model to calculate the distribution network line loss coefficient, and performs loss analysis on the distribution network line loss coefficient;

[0047] Line loss reduction analysis module: This module performs line loss reduction processing on the distribution network based on the loss analysis results of the line loss data calculation module, evaluates and analyzes the line loss of the distribution network after loss reduction, and outputs a line loss reduction plan;

[0048] Voltage loss data calculation module: based on the distribution network operation voltage loss data, establishes a voltage loss coefficient model to calculate the distribution network voltage loss coefficient, and performs loss analysis on the distribution network voltage loss coefficient;

[0049] Voltage loss analysis module: performs voltage loss reduction processing on the distribution network based on the loss analysis results of the voltage loss data calculation module, evaluates and analyzes the voltage loss of the distribution network after loss reduction, and outputs a voltage loss reduction plan;

[0050] Comprehensive loss analysis module: Analyzes the comprehensive loss index of the distribution network based on the distribution network line loss coefficient and the distribution network voltage loss coefficient, classifies the comprehensive loss index of the distribution network into loss levels, and outputs a comprehensive loss reduction plan for the distribution network.

[0051] Technical effects and advantages of the present invention:

[0052] 3. By comprehensively applying data analysis, the present invention can quickly and accurately identify the loss sources in the distribution network, thereby formulating and implementing targeted loss reduction strategies. This not only shortens the formulation cycle of loss reduction plans, but also greatly improves the implementation efficiency of loss reduction work. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The present invention is further described with reference to the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without inventive effort.

[0054] Figure 1 Schematic diagram of the method of the present invention.

[0055] Figure 2 Schematic diagram of the overall structure of the system of the present invention. DETAILED DESCRIPTION

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0057] Example 1

[0058] See also Figure 1 As shown, the present invention provides a distribution network comprehensive strategy loss reduction decision-making method, comprising the following steps:

[0059] Step S1: Acquire comprehensive data on distribution network operation losses, wherein the comprehensive data includes distribution network operation line loss data and distribution network operation voltage loss data;

[0060] In this embodiment, it should be specifically noted that the distribution network operation line loss data includes the average load of the line, the maximum load of the line, the maximum current passing through the distribution network components, the resistance of the distribution network components, the operating time of the distribution network line, the temperature of the distribution network conductor, the power supply of the distribution network, and the power sales of the distribution network; the distribution network operation voltage loss data includes the active power of the distribution network line, the reactive power of the distribution network line, the effective value of the line voltage during normal operation specified when the distribution network line is designed, the resistance of the distribution network line, and the reactance of the distribution network line.

[0061] Step S2: Based on the acquired distribution network operation line loss data, a line loss coefficient model is established to calculate the distribution network line loss coefficient, and loss analysis is performed on the distribution network line loss coefficient;

[0062] In this embodiment, it should be specifically explained that in step S2, the calculation steps of establishing the line loss coefficient model to calculate the distribution network line loss coefficient are specifically as follows:

[0063] Step S21: Calculate the line loss factor LF of the distribution network. The calculation model is as follows:

[0064] Where Lr represents the load rate of the distribution network line, Pavg represents the average load of the line, Pmax represents the maximum load of the line, and k represents a constant;

[0065] Step S22: Calculate the electric energy loss EL caused by the resistance of the distribution network components. The specific calculation model is:

[0066] EL=3×(I max ) 2 ×LF×R×t×10 -3 , where Imax It is represented by the maximum current passing through the distribution network components, LF is represented by the line loss factor of the distribution network, R is represented by the resistance of the distribution network components, and t is represented by the operating time of the distribution network line;

[0067] Step S23: Calculate the distribution network line loss coefficient LLC. The specific calculation model is:

[0068] Among them, LLC represents the line loss coefficient of the distribution network, Tw represents the temperature of the distribution network conductor, T max It is represented by the maximum temperature allowed to pass through the distribution network conductor, LF is represented by the line loss factor of the distribution network, EL is represented by the power loss caused by the resistance of the distribution network components, and Llr is represented by the line loss rate, where: ps represents the power supply of the distribution network, es represents the power sales of the distribution network, and e represents a natural constant.

[0069] In this embodiment, it should be specifically explained that, in step S2, the specific content of the loss analysis of the distribution network line loss coefficient is:

[0070] The distribution network line loss coefficient is extracted and compared with the preset line loss threshold. If the distribution network line loss coefficient is less than or equal to the preset line loss threshold, it is determined that the distribution network line loss is normal, that is, within the predetermined line loss range, indicating that no loss reduction processing is required, and the step loop is jumped out; if the distribution network line loss coefficient is greater than the preset line loss threshold, it is determined that the distribution network line loss is abnormal, and step S3 is further executed to perform loss reduction processing.

[0071] Step S3: performing line loss reduction processing on the distribution network according to the loss analysis result of step S2, evaluating and analyzing the line loss of the distribution network after the loss reduction, and outputting a line loss reduction plan;

[0072] In this embodiment, it should be specifically explained that, in step S3, the specific content of performing line loss reduction processing on the distribution network according to the loss analysis result of step S2 is as follows:

[0073] The line loss of the distribution network can be reduced by replacing the conductors. When the transmission load remains unchanged, replacing the conductors and reducing the line resistance can achieve the effect of reducing losses.

[0074] The percentage of loss reduction after replacing the wire is: Where R1 represents the resistance of the wire before the wire is replaced, and R2 represents the resistance of the wire after the wire is replaced;

[0075] After replacing the distribution network conductors, the power loss and energy saving are: Wherein, Lq represents the actual power loss before replacing the distribution network conductor;

[0076] In this embodiment, it should be specifically explained that in step S3, the specific content of evaluating and analyzing the line loss of the distribution network after loss reduction is:

[0077] Based on the energy saving ΔQ after replacing the distribution network conductors, the line loss deviation index λ1 of the distribution network after loss reduction is analyzed, specifically: ΔQ0 represents the preset maximum loss reduction and power saving. If λ1 is less than or equal to the preset threshold A, it is determined that the loss reduction treatment method for the distribution network line loss is reasonable and ideal, and the current loss reduction treatment scheme is determined as the optimal line loss reduction scheme, and the optimal line loss reduction scheme is output. Otherwise, step S3 is looped again, the loss reduction treatment is performed again, and the loss reduction results are evaluated to find the optimal line loss reduction scheme.

[0078] In this embodiment, it should be specifically explained that the method for reducing line losses in the distribution network also includes reducing line resistance by increasing the conductor cross-section; reducing total line resistance by optimizing the line and shortening the line length, thereby reducing line losses; installing reactive power compensation devices at appropriate locations in the distribution network (such as near nodes with large reactive loads); guiding users to reasonably arrange their electricity usage time and reduce peak-valley differences by implementing peak-valley electricity price economic measures; and reasonably arranging the opening and closing states of the interconnecting switches according to the real-time load, line status, etc. of the distribution network by regularly analyzing and optimizing the operation mode of the power grid.

[0079] Step S4: Based on the obtained distribution network operation voltage loss data, a voltage loss coefficient model is established to calculate the distribution network voltage loss coefficient, and loss analysis is performed on the distribution network voltage loss coefficient;

[0080] In this embodiment, it should be specifically explained that in step S3, the calculation steps of the distribution network voltage loss coefficient are specifically as follows:

[0081] Step S41: Calculate the distribution network line current factor ICF. The calculation model is as follows:

[0082] Among them, AP represents the active power of the distribution network line, RP represents the reactive power of the distribution network line, and U y It represents the effective value of the line voltage during normal operation specified in the design of the distribution network line;

[0083] Step S42: Calculate the voltage drop longitudinal component Uc. The calculation model is as follows:

[0084] in, Expressed as the active power proportional factor, Expressed as the reactive power proportional factor, Rl represents the resistance of the distribution network line, and X represents the reactance of the distribution network line;

[0085] Step S43: Calculate the voltage loss coefficient VLC of the distribution network. The calculation model is as follows:

[0086] Among them, VLC represents the voltage loss coefficient of the distribution network, and Uc represents the longitudinal component of the voltage drop.

[0087] In this embodiment, it should be specifically noted that the longitudinal component of voltage drop refers to the component of the voltage drop in the longitudinal direction (active power direction) of the line in the phasor diagram when current flows through the line due to the existence of line resistance and reactance. This component is mainly caused by the active power loss of the line (through resistance) and the voltage drop caused by reactive power (through reactance).

[0088] In this embodiment, it should be specifically noted that smart meters are widely used in modern power distribution networks and can also directly measure active and reactive power. Smart meters contain specialized metering chips capable of performing digital signal processing, such as fast Fourier transforms (FFTs), on the sampled voltage and current signals. By analyzing the voltage and current signals in the frequency domain, the fundamental and harmonic components are distinguished, allowing accurate calculation of active and reactive power. For example, for non-sinusoidal voltage and current waveforms containing harmonics, smart meters can calculate them based on the corresponding harmonic power theory, avoiding the calculation errors that would be expected from a simple sine wave assumption.

[0089] In this embodiment, it should be specifically explained that, in step S3, the specific content of the loss analysis of the voltage loss coefficient of the distribution network is:

[0090] The distribution network voltage loss coefficient is extracted and compared with the preset voltage loss threshold. If the distribution network voltage loss coefficient is less than or equal to the preset voltage loss threshold, it is determined that the distribution network voltage loss is normal, that is, within the predetermined voltage loss range, indicating that no loss reduction treatment is required, and the step loop is jumped out; if the distribution network voltage loss coefficient is greater than the preset voltage loss threshold, it is determined that the distribution network voltage loss is abnormal, and step S5 is further executed to perform loss reduction treatment.

[0091] Step S5: performing voltage loss reduction processing on the distribution network according to the loss analysis result of step S4, evaluating and analyzing the voltage loss of the distribution network after the loss reduction, and outputting a voltage loss reduction plan;

[0092] In this embodiment, it should be specifically explained that, in step S5, the specific content of performing voltage loss reduction processing on the distribution network according to the loss analysis result of step S4 is as follows:

[0093] The voltage loss of the distribution network is reduced by boosting and reducing the voltage of the distribution network. The specific contents are as follows:

[0094] Boost the distribution network: the loss percentage ΔL after boosting the distribution network is: Among them, U N1 It is the rated voltage of the distribution network before boosting, U N2 It represents the rated voltage of the distribution network after voltage boosting;

[0095] The amount of energy saved by reducing losses after the distribution network voltage is boosted is: Among them, Le represents the power loss before the distribution network is boosted;

[0096] The distribution network is subjected to voltage reduction: the voltage reduction change percentage ΔS is: Among them, U S1 It is the bus voltage before the distribution network is stepped down, U S2 It represents the bus voltage after the distribution network is stepped down;

[0097] The energy saving ΔB after the distribution network voltage is reduced is: In this embodiment, it should be specifically explained that the bus voltage refers to the voltage on the common conductor (i.e., bus) connecting multiple power sources or loads in the power system. In the power system, the bus usually serves as a connecting hub between the various circuits within the power station and substation, and plays the role of collecting and distributing electric energy. The bus voltage is one of the key parameters for evaluating the operating status, power quality and stability of the power system. In order to ensure the normal operation of the power system, the bus voltage is usually monitored in real time through various instruments and automation systems. Common measurement methods include using a voltage transformer (PT) to convert high voltage into a low voltage signal, which is convenient for instruments to read and process. In addition, digital technology is widely used in modern power systems, such as electronic transformers in smart substations, which can more accurately obtain bus voltage information and transmit it to the control center through a communication network.

[0098] In this embodiment, it should be specifically explained that, in step S5, the specific content of evaluating and analyzing the voltage loss of the distribution network after loss reduction is:

[0099] Based on the loss-reduction energy saving ΔA after the distribution network voltage is boosted and the loss-reduction energy saving ΔB after the distribution network voltage is reduced, the voltage loss deviation index λ2 of the distribution network after loss reduction is analyzed, specifically:

[0100] ΔA0 represents the maximum loss reduction and energy saving of the preset boost process, ΔB0 represents the maximum loss reduction and energy saving of the preset buck process, w1 and w2 represent the weights of the loss reduction and energy saving after the distribution network boosts and bucks, respectively, and w1+w2=1;

[0101] If λ2 is less than or equal to the preset threshold value B, it is determined that the distribution network voltage loss reduction treatment method is reasonable and ideal, and the current loss reduction treatment scheme is determined as the optimal voltage loss loss reduction scheme, and the optimal voltage loss reduction scheme is output. Otherwise, step S5 is looped again, the loss reduction treatment is performed again, and the loss reduction results are evaluated to find the optimal voltage loss loss reduction scheme.

[0102] Step S6: Analyze the comprehensive loss index of the distribution network based on the line loss coefficient and the voltage loss coefficient of the distribution network, classify the comprehensive loss index of the distribution network into loss levels, and output a comprehensive loss reduction plan for the distribution network.

[0103] In this embodiment, it should be specifically explained that in step S6, analyzing the comprehensive loss index of the distribution network is specifically as follows: Among them, LAI represents the comprehensive loss index of the distribution network, LLC represents the line loss coefficient of the distribution network, VLC represents the voltage loss coefficient of the distribution network, μ1 and μ2 represent the weights of the line loss coefficient and the voltage loss coefficient of the distribution network, respectively, and μ1+μ2=1;

[0104] In this embodiment, it should be specifically explained that, in step S6, the specific content of classifying the comprehensive loss index of the distribution network into loss levels is: comparing the comprehensive loss index of the distribution network with the preset comprehensive loss threshold value respectively; if the comprehensive loss index of the distribution network is less than the first preset comprehensive loss threshold value, it is determined that the comprehensive loss of the distribution network belongs to the low loss level; if the comprehensive loss index of the distribution network is between the first preset comprehensive loss threshold value and the second preset comprehensive loss threshold value, it is determined that the comprehensive loss of the distribution network belongs to the medium loss level; if the comprehensive loss index of the distribution network is between the second preset comprehensive loss threshold value and the third preset comprehensive loss threshold value, it is determined that the comprehensive loss of the distribution network belongs to the high loss level; and loss reduction plans are formulated for distribution networks of different loss levels to form a distribution network loss level loss reduction plan;

[0105] Based on the distribution network loss level loss reduction plan, the distribution network line loss loss reduction plan output in step S3 and the distribution network voltage loss loss reduction plan output in step S5, a comprehensive distribution network loss reduction plan is formed and output.

[0106] Example 2

[0107] See also Figure 2 As shown, the present invention provides a distribution network comprehensive strategy loss reduction decision-making system, including a distribution network loss data acquisition module, a line loss data calculation module, a line loss reduction analysis module, a voltage loss data calculation module, a voltage loss reduction analysis module and a comprehensive loss analysis module.

[0108] The distribution network loss data acquisition module acquires the comprehensive data of distribution network operation loss, wherein the comprehensive data includes the distribution network operation line loss data and the distribution network operation voltage loss data;

[0109] The line loss data calculation module establishes a line loss coefficient model based on the acquired distribution network operation line loss data to calculate the distribution network line loss coefficient, and performs loss analysis on the distribution network line loss coefficient;

[0110] The line loss reduction analysis module performs line loss reduction processing on the distribution network according to the loss analysis results of the line loss data calculation module, evaluates and analyzes the line loss of the distribution network after loss reduction, and outputs a line loss reduction plan;

[0111] The voltage loss data calculation module obtains the distribution network operation voltage loss data, establishes a voltage loss coefficient model to calculate the distribution network voltage loss coefficient, and performs loss analysis on the distribution network voltage loss coefficient;

[0112] The voltage loss analysis module performs voltage loss reduction processing on the distribution network based on the loss analysis results of the voltage loss data calculation module, evaluates and analyzes the voltage loss of the distribution network after loss reduction, and outputs a voltage loss reduction plan;

[0113] The comprehensive loss analysis module analyzes the comprehensive loss index of the distribution network based on the distribution network line loss coefficient and the distribution network voltage loss coefficient, classifies the comprehensive loss index of the distribution network into loss grades, and outputs a comprehensive loss reduction plan for the distribution network.

[0114] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0115] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A distribution network comprehensive strategy loss reduction decision-making method, characterized in that: The following steps are involved: Step S1: Acquire comprehensive data on distribution network operation losses, wherein the comprehensive data includes distribution network operation line loss data and distribution network operation voltage loss data; Step S2: Based on the acquired distribution network operation line loss data, a line loss coefficient model is established to calculate the distribution network line loss coefficient, and loss analysis is performed on the distribution network line loss coefficient; The specific steps of establishing the line loss coefficient model to calculate the distribution network line loss coefficient are as follows: Step S21: Calculate the line loss factor of the distribution network LF , the calculation model is as follows: ,in, Lr Expressed as the load rate of the distribution network line, where , P avg Expressed as the average load of the line, P max It is expressed as the maximum load of the line, and k is expressed as a constant; Step S22: Calculate the power loss caused by the resistance of the distribution network components EL , the calculation model is as follows: ,in, I max Expressed as the maximum current through the distribution network components, LF It is represented by the line loss factor of the distribution network, R is represented by the resistance of the distribution network components, and t is represented by the operating time of the distribution network line; Step S23: Calculate the line loss coefficient of the distribution network LLC , the calculation model is as follows: ,in, LLC Expressed as the distribution network line loss coefficient, Tw Expressed as the temperature of the distribution network conductor, T max Expressed as the maximum temperature allowed to pass through the distribution network conductor, LF Expressed as the line loss factor of the distribution network, EL Represents the power loss caused by the resistance of distribution network components, Llr Expressed as line loss rate, where , ps It is represented by the power supply of the distribution network, es It is expressed as the electricity sold by the distribution network, and e is expressed as a natural constant; Step S3: performing line loss reduction processing on the distribution network according to the loss analysis result of step S2, evaluating and analyzing the line loss of the distribution network after the loss reduction, and outputting a line loss reduction plan; Step S4: Based on the obtained distribution network operation voltage loss data, a voltage loss coefficient model is established to calculate the distribution network voltage loss coefficient, and loss analysis is performed on the distribution network voltage loss coefficient; The calculation steps of the distribution network voltage loss coefficient are specifically as follows: Step S41: Calculate the distribution network line current factor ICF , the calculation model is as follows: , where AP represents the active power of the distribution network line, and RP represents the reactive power of the distribution network line. It represents the effective value of the line voltage during normal operation specified in the design of the distribution network line; Step S42: Calculate the voltage drop longitudinal component Uc. The calculation model is as follows: ,in, Expressed as the active power proportional factor, , Expressed as the reactive power proportional factor, , It represents the resistance of the distribution network line, and X represents the reactance of the distribution network line; Step S43: Calculate the voltage loss coefficient VLC of the distribution network. The calculation model is as follows: , where VLC represents the voltage loss coefficient of the distribution network and Uc represents the longitudinal component of the voltage drop; Step S5: performing voltage loss reduction processing on the distribution network according to the loss analysis result of step S4, evaluating and analyzing the voltage loss of the distribution network after the loss reduction, and outputting a voltage loss reduction plan; Step S6: Analyze the comprehensive loss index of the distribution network based on the line loss coefficient and the voltage loss coefficient of the distribution network, classify the comprehensive loss index of the distribution network into loss levels, and output a comprehensive loss reduction plan for the distribution network.

2. A distribution network comprehensive strategy loss reduction decision-making method according to claim 1, characterized in that: The specific content of the loss analysis of the distribution network line loss coefficient is as follows: The distribution network line loss coefficient is extracted and compared with the preset line loss threshold. If the distribution network line loss coefficient is less than or equal to the preset line loss threshold, it is determined that the distribution network line loss is normal, that is, within the predetermined line loss range, indicating that no loss reduction processing is required, and the step loop is jumped out; if the distribution network line loss coefficient is greater than the preset line loss threshold, it is determined that the distribution network line loss is abnormal, and step S3 is further executed to perform loss reduction processing.

3. A distribution network comprehensive strategy loss reduction decision-making method according to claim 1, characterized in that: In step S3, the specific content of performing line loss reduction processing on the distribution network according to the loss analysis result of step S2 is as follows: The line loss of the distribution network is reduced by replacing the conductors. The loss reduction percentage after replacing the conductors is: ,in, It represents the resistance of the wire before replacing the wire. It represents the resistance of the wire after the wire is replaced; After replacing the distribution network conductors, the power loss and energy saving are: ,in, Lq Indicates the actual power loss before replacing the distribution network conductors.

4. A distribution network comprehensive strategy loss reduction decision-making method according to claim 1, characterized in that: In step S3, the specific contents of evaluating and analyzing the line loss of the distribution network after loss reduction are as follows: Loss reduction and power saving based on replacing distribution network conductors , analyze the distribution network line loss deviation index after loss reduction , specifically: , Indicates the preset maximum power saving. If If the value is less than or equal to the preset threshold value A, it is determined that the loss reduction treatment method for the distribution network line loss is reasonable and ideal, then the loss reduction treatment scheme for this time is determined as the optimal line loss reduction scheme, and the optimal line loss reduction scheme is output; otherwise, step S3 is looped again, the loss reduction treatment is performed again, and the loss reduction results are evaluated to find the optimal line loss reduction scheme.

5. A distribution network comprehensive strategy loss reduction decision-making method according to claim 1, characterized in that: The specific content of the loss analysis of the distribution network voltage loss coefficient is as follows: The distribution network voltage loss coefficient is extracted and compared with the preset voltage loss threshold. If the distribution network voltage loss coefficient is less than or equal to the preset voltage loss threshold, it is determined that the distribution network voltage loss is normal, that is, within the predetermined voltage loss range, indicating that no loss reduction treatment is required, and the step loop is jumped out; if the distribution network voltage loss coefficient is greater than the preset voltage loss threshold, it is determined that the distribution network voltage loss is abnormal, and step S5 is further executed to perform loss reduction treatment.

6. A distribution network comprehensive strategy loss reduction decision-making method according to claim 1, characterized in that: In step S5, the specific content of performing voltage loss reduction processing on the distribution network according to the loss analysis result of step S4 is as follows: The voltage loss of the distribution network is reduced by boosting and reducing the voltage of the distribution network. The specific contents are as follows: Boosting the distribution network: Reducing the loss percentage after boosting the distribution network for: ,in, It represents the rated voltage of the distribution network before voltage boosting. It represents the rated voltage of the distribution network after voltage boosting; Loss reduction and power saving after distribution network voltage boost for: ,in, Le It is the power loss before the distribution network is boosted; Reducing the voltage of the distribution network: percentage change of voltage reduction for: ,in, It represents the bus voltage before the distribution network is stepped down. It represents the bus voltage after the distribution network is stepped down; Loss reduction and power saving after voltage reduction in distribution network for: .

7. A distribution network comprehensive strategy loss reduction decision-making method according to claim 1, characterized in that: In step S5, the specific contents of evaluating and analyzing the voltage loss of the distribution network after loss reduction are as follows: Based on the loss reduction and power saving after the distribution network voltage is boosted Reduce power losses and save electricity after reducing the voltage of the distribution network , analyze the voltage loss deviation index of the distribution network after loss reduction , specifically: , Indicates the maximum power saving for the preset boost process. It represents the maximum loss reduction and energy saving of the preset voltage reduction process, w1 and w2 represent the weights of the loss reduction and energy saving after the distribution network voltage is boosted and the loss reduction and energy saving after the distribution network voltage is reduced, respectively, and w1+w2=1.

8. A distribution network comprehensive strategy loss reduction decision-making method according to claim 1, characterized in that: In step S6, the specific content of classifying the comprehensive loss index of the distribution network into loss levels is as follows: the specific content of classifying the comprehensive loss index of the distribution network into loss levels is as follows: comparing the comprehensive loss index of the distribution network with preset comprehensive loss thresholds respectively; if the comprehensive loss index of the distribution network is less than the first preset comprehensive loss threshold, determining that the comprehensive loss of the distribution network belongs to a low loss level; if the comprehensive loss index of the distribution network is between the first preset comprehensive loss threshold and the second preset comprehensive loss threshold, determining that the comprehensive loss of the distribution network belongs to a medium loss level; if the comprehensive loss index of the distribution network is between the second preset comprehensive loss threshold and the third preset comprehensive loss threshold, determining that the comprehensive loss of the distribution network belongs to a high loss level; and formulating loss reduction plans for distribution networks of different loss levels to form a distribution network loss level loss reduction plan; Based on the distribution network loss level loss reduction plan, the distribution network line loss loss reduction plan output in step S3 and the distribution network voltage loss loss reduction plan output in step S5, a comprehensive distribution network loss reduction plan is formed and output.

9. A distribution network comprehensive strategy loss reduction decision system, used to implement a distribution network comprehensive strategy loss reduction decision method according to any one of claims 1 to 8, characterized in that: include: Distribution network loss data acquisition module: acquires comprehensive data on distribution network operation losses, including distribution network operation line loss data and distribution network operation voltage loss data; Line loss data calculation module: based on the acquired distribution network operation line loss data, establishes a line loss coefficient model to calculate the distribution network line loss coefficient, and performs loss analysis on the distribution network line loss coefficient; Line loss reduction analysis module: This module performs line loss reduction processing on the distribution network based on the loss analysis results of the line loss data calculation module, evaluates and analyzes the line loss of the distribution network after loss reduction, and outputs a line loss reduction plan; Voltage loss data calculation module: based on the distribution network operation voltage loss data, establishes a voltage loss coefficient model to calculate the distribution network voltage loss coefficient, and performs loss analysis on the distribution network voltage loss coefficient; Voltage loss analysis module: performs voltage loss reduction processing on the distribution network based on the loss analysis results of the voltage loss data calculation module, evaluates and analyzes the voltage loss of the distribution network after loss reduction, and outputs a voltage loss reduction plan; Comprehensive loss analysis module: Analyzes the comprehensive loss index of the distribution network based on the distribution network line loss coefficient and the distribution network voltage loss coefficient, classifies the comprehensive loss index of the distribution network into loss levels, and outputs a comprehensive loss reduction plan for the distribution network.

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