Power distribution network loss reduction method, system, equipment and medium

Abstract

The invention provides a power distribution network loss reduction method, system and device and a medium. The method comprises the steps of obtaining power generation data of a distributed power supply and electric quantity data of a transformer area in a power distribution network connected to the distributed power supply; based on the electric quantity data, determining a line loss influence factor of the power distribution network connected with the distributed power supply by using a quantitative analysis method; calculating power loss data according to the power generation data of the distributed power supply and the line loss influence factor of the power distribution network connected to the distributed power supply; according to the power loss data, loss reduction is carried out on the power distribution network connected to the distributed power supply by using a power flow algorithm; by combining the power generation data of the distributed power supply and the electric quantity data of the transformer area in the power distribution network connected with the distributed power supply, the power loss data of the distributed power supply is mined, and finally, the loss of the power distribution network is reduced according to the power loss data, so that the power distribution network can be optimized by optimizing the configuration of the distributed power supply. The distributed power supply reduces the network loss, can play a role in supporting voltage, and enables the operation of the power distribution network to be more reliable and safer.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution network line loss, and in particular to a power distribution network loss reduction method, system, equipment and medium. Background Art

[0002] At present, energy is the basic support for economic and social development. With the continuous expansion of the installed capacity of new energy such as wind power and photovoltaic power generation, the volatility of new energy output is increasing, which puts higher requirements on the regulation capacity of the power system. At present, the regulation capacity of the power system is still difficult to fully adapt to the needs of new energy development, resulting in insufficient peak capacity during peak hours and the problem of absorbing power during trough hours.

[0003] On the one hand, the intermittent and volatile nature of distributed power sources leads to increased network losses, which brings great difficulties to the formulation of active distribution network optimization strategies. On the other hand, since the distribution network has a higher R / X ratio (Resistance / Reactance, the ratio of resistance to reactance), there is a more obvious coupling relationship between active and reactive power. With the large-scale access of distributed power sources, the distribution network has changed from the traditional one-way power flow to two-way or multi-way power flow, which further increases the interaction between active and reactive power. The randomness and intermittent characteristics of distributed power sources make the operation state of the distribution network more complicated, and it is difficult to simply decouple active and reactive power. Therefore, the traditional active and reactive decoupling theory is no longer applicable to the optimization analysis of the distribution network. These problems will challenge the development of distribution network loss reduction and voltage regulation strategies. Summary of the invention

[0004] In order to solve the problem that the indirectness and volatility of distributed power sources lead to increased line losses in the distribution network connected to the distributed power sources, the present invention proposes a method for reducing losses in the distribution network, comprising:

[0005] Obtaining power generation data of distributed power sources and power data of the substations in the distribution network connected to the distributed power sources;

[0006] Based on the power data, using a quantitative analysis method, determining a line loss impact factor of the distribution network connected to the distributed power source;

[0007] Calculating power loss data according to the power generation data of the distributed power source and the line loss impact factor of the distribution network connected to the distributed power source;

[0008] According to the power loss data, a power flow algorithm is used to reduce the loss of a distribution network connected to the distributed power source.

[0009] Optionally, the determining, based on the power data and using a quantitative analysis method, a line loss impact factor of the distribution network connected to the distributed power source includes:

[0010] According to the power data, obtaining the line loss power of the substation area;

[0011] Quantitatively analyzing the line loss electricity of the substation area, and determining the line loss impact factor of the distribution network connected to the distributed power source according to the quantitative analysis result;

[0012] Among them, the line loss influencing factors include one or more of the following: distributed power source access location, distributed power source access capacity, power information and transmission line operation efficiency.

[0013] Optionally, the power generation data of the distributed power source includes one or more of the following: power generation, power generation efficiency and energy consumption data;

[0014] The power data of the substation in the distribution network connected to the distributed power source includes one or more of the following: the line unit length resistance of the distribution network connected to the distributed power source, the distance between the access location of the distributed power source and the substation system, the active power consumed by the distributed power source load, the active power output by the distributed power source and the line length of the distribution network connected to the distributed power source;

[0015] The power loss data includes: power loss data between a distribution network connected to a distributed power source and the distributed power source, and power loss data between the distributed power source and a load.

[0016] Optionally, reducing the loss of a distribution network connected to the distributed power source by using a power flow algorithm according to the power loss data includes:

[0017] According to the power loss data between the distributed power source and the load, the power flow direction data of the distribution network is calculated by using the forward-backward substitution method in the power flow algorithm;

[0018] According to the power flow data, with the goal of maximizing the access capacity of the distributed power source in the line loss influencing factor, the structure and power flow distribution changes of the distribution network accessed to the distributed power source are obtained;

[0019] According to the structure of the distribution network connected to the distributed power source and the changes in the power flow distribution, the loss of the distribution network connected to the distributed power source is reduced.

[0020] Optionally, reducing the loss of a distribution network connected to the distributed power source by using a power flow algorithm according to the power loss data includes:

[0021] According to the power loss data between the distributed power source and the load, the power loss of the branch of the distribution network connected to the distributed power source is calculated by using the Newton-Raphson method in the power flow algorithm;

[0022] According to the branch power loss and the preset loss reduction constraint condition, with the goal of maximizing the distributed power access capacity in the line loss influencing factor, obtaining reactive power compensation data of the distribution network;

[0023] According to the reactive power compensation data, the loss of the distribution network connected to the distributed power source is reduced.

[0024] Optionally, reducing the loss of a distribution network connected to the distributed power source by using a power flow algorithm according to the power loss data includes:

[0025] According to the power loss data, using the fast decoupling method in the power flow algorithm, the power flow distribution data of the distribution network connected to the distributed power source is calculated;

[0026] Calculating the line loss change rate and line loss change amount of the distribution network connected to the distributed power source according to the power flow distribution data;

[0027] According to the line loss change rate and the line loss change amount, the weak link of operation of the distribution network connected to the distributed power source is obtained;

[0028] According to the weak links in the operation of the distribution network connected to the distributed power source, reducing the loss of the distribution network connected to the distributed power source;

[0029] The power flow distribution data includes one or more of the following: the distance between the access location of the distributed power source and the substation system, the line length of the distribution network connected to the distributed power source, the active power consumed by the distributed power source load, the reactive power consumed by the distributed power source load, the active power output by the distributed power source, and the reactive power output by the distributed power source;

[0030] The operational weak links include one or more of the following: the access location of the distributed power source, the operating mode of the distributed power source, and the access capacity of the distributed power source.

[0031] Optionally, the calculation formula for the line loss change rate of the distribution network connected to the distributed power source is as follows:

[0032]

[0033] Among them, Loss λ represents the line loss change rate of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; Len represents the line length of the distribution network connected to the distributed power source; P L Indicates the active power consumed by the distributed power load; Q L Represents the reactive power consumed by distributed power load; P G Indicates the active power output of distributed power supply; Q GIt represents the reactive power output by the distributed power source; a represents the first coefficient; b represents the second coefficient.

[0034] Optionally, the calculation formula corresponding to the power loss data between the distribution network connected to the distributed power source and the distributed power source is as follows:

[0035]

[0036] Among them, Loss A represents the power loss data between the distribution network connected to the distributed power source and the distributed power source; r represents the line resistance per unit length of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; P L Indicates the active power consumed by the distributed generation load; P G Indicates the active power output of distributed power supply; Q L Indicates the reactive power consumed by distributed power load; Q G It represents the reactive power output by the distributed power source; V represents the operating voltage of the distribution network connected to the distributed power source; a represents the first coefficient; b represents the second coefficient; c represents the third coefficient.

[0037] Optionally, the calculation formula corresponding to the power loss data between the distributed power source and the load is as follows:

[0038]

[0039] Among them, Loss B Represents the power loss data between the distributed generation and the load; r represents the line resistance per unit length of the distribution network connected to the distributed generation; Len represents the line length of the distribution network connected to the distributed generation; G represents the distance from the distributed generation access location to the substation system; P L Indicates the active power consumed by the distributed power load; Q L represents the reactive power consumed by the distributed power load; c represents the third coefficient; V represents the operating voltage of the distribution network connected to the distributed power supply.

[0040] Based on the same inventive concept, the present invention also provides a distribution network loss reduction system, comprising:

[0041] An electric quantity data acquisition module is used to acquire power generation data of a distributed power source and electric quantity data of a substation in a distribution network connected to the distributed power source;

[0042] A line loss impact calculation module, used to determine the line loss impact factor of the distribution network connected to the distributed power source based on the power data and using a quantitative analysis method;

[0043] A power loss calculation module, used to calculate power loss data according to the power generation data of the distributed power source and the line loss influence factor of the distribution network connected to the distributed power source;

[0044] The distribution network loss reduction module is used to reduce the loss of the distribution network connected to the distributed power source according to the power loss data and using a power flow algorithm.

[0045] Optionally, the line loss impact calculation module is specifically used to:

[0046] According to the power data, obtaining the line loss power of the substation area;

[0047] Quantitatively analyzing the line loss electricity of the substation area, and determining the line loss impact factor of the distribution network connected to the distributed power source according to the quantitative analysis result;

[0048] Among them, the line loss influencing factors include one or more of the following: distributed power source access location, distributed power source access capacity, power information and transmission line operation efficiency.

[0049] Optionally, the power generation data of the distributed power source in the power data acquisition module includes one or more of the following: power generation, power generation efficiency and energy consumption data;

[0050] The power data of the substation in the distribution network connected to the distributed power source includes one or more of the following: the line unit length resistance of the distribution network connected to the distributed power source, the distance between the access location of the distributed power source and the substation system, the active power consumed by the distributed power source load, the active power output by the distributed power source and the line length of the distribution network connected to the distributed power source;

[0051] The power loss data includes: power loss data between a distribution network connected to a distributed power source and the distributed power source, and power loss data between the distributed power source and a load.

[0052] Optionally, the distribution network loss reduction module is specifically used to:

[0053] According to the power loss data between the distributed power source and the load, the power flow direction data of the distribution network is calculated by using the forward-backward substitution method in the power flow algorithm;

[0054] According to the power flow data, with the goal of maximizing the access capacity of the distributed power source in the line loss influencing factor, the structure and power flow distribution changes of the distribution network accessed to the distributed power source are obtained;

[0055] According to the structure of the distribution network connected to the distributed power source and the changes in the power flow distribution, the loss of the distribution network connected to the distributed power source is reduced.

[0056] Optionally, the distribution network loss reduction module is specifically used to:

[0057] According to the power loss data between the distributed power source and the load, the power loss of the branch of the distribution network connected to the distributed power source is calculated by using the Newton-Raphson method in the power flow algorithm;

[0058] According to the branch power loss and the preset loss reduction constraint condition, with the goal of maximizing the distributed power access capacity in the line loss influencing factor, obtaining reactive power compensation data of the distribution network;

[0059] According to the reactive power compensation data, the loss of the distribution network connected to the distributed power source is reduced.

[0060] Optionally, the distribution network loss reduction module is specifically used to:

[0061] According to the power loss data, using the fast decoupling method in the power flow algorithm, the power flow distribution data of the distribution network connected to the distributed power source is calculated;

[0062] Calculating the line loss change rate and line loss change amount of the distribution network connected to the distributed power source according to the power flow distribution data;

[0063] According to the line loss change rate and the line loss change amount, the weak link of operation of the distribution network connected to the distributed power source is obtained;

[0064] According to the weak links in the operation of the distribution network connected to the distributed power source, reducing the loss of the distribution network connected to the distributed power source;

[0065] The power flow distribution data includes one or more of the following: the distance between the access location of the distributed power source and the substation system, the line length of the distribution network connected to the distributed power source, the active power consumed by the distributed power source load, the reactive power consumed by the distributed power source load, the active power output by the distributed power source, and the reactive power output by the distributed power source;

[0066] The operational weak links include one or more of the following: the access location of the distributed power source, the operating mode of the distributed power source, and the access capacity of the distributed power source.

[0067] Optionally, the calculation formula of the line loss change rate of the distribution network connected to the distributed power source in the distribution network loss reduction module is as follows:

[0068]

[0069] Among them, Loss λrepresents the line loss change rate of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; Len represents the line length of the distribution network connected to the distributed power source; P L Indicates the active power consumed by the distributed power load; Q L Represents the reactive power consumed by distributed power load; P G Indicates the active power output of distributed power supply; Q G It represents the reactive power output by the distributed power source; a represents the first coefficient; b represents the second coefficient.

[0070] Optionally, the calculation formula corresponding to the power loss data between the distribution network connected to the distributed power source and the distributed power source in the distribution network loss reduction module is as follows:

[0071]

[0072] Among them, Loss A represents the power loss data between the distribution network connected to the distributed power source and the distributed power source; r represents the line resistance per unit length of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; P L Indicates the active power consumed by the distributed generation load; P G Indicates the active power output of distributed power supply; Q L Indicates the reactive power consumed by distributed power load; Q G It represents the reactive power output by the distributed power source; V represents the operating voltage of the distribution network connected to the distributed power source; a represents the first coefficient; b represents the second coefficient; c represents the third coefficient.

[0073] Optionally, the calculation formula corresponding to the power loss data between the distributed power source and the load in the distribution network loss reduction module is as follows:

[0074]

[0075] Among them, Loss B Represents the power loss data between the distributed generation and the load; r represents the line resistance per unit length of the distribution network connected to the distributed generation; Len represents the line length of the distribution network connected to the distributed generation; G represents the distance from the distributed generation access location to the substation system; P L Indicates the active power consumed by the distributed power load; Q L represents the reactive power consumed by the distributed power load; c represents the third coefficient; V represents the operating voltage of the distribution network connected to the distributed power supply.

[0076] In another aspect, the present invention further provides an electronic device, comprising: at least one processor and a memory; the memory and the processor are connected via a bus;

[0077] The memory is used to store one or more programs;

[0078] When the one or more programs are executed by the at least one processor, a distribution network loss reduction method as described above is implemented.

[0079] On the other hand, the present invention further provides a computer-readable storage medium having an execution program stored thereon, and when the execution program is executed, a distribution network loss reduction method as described above is implemented.

[0080] Compared with the prior art, the present invention has the following beneficial effects:

[0081] The present invention provides a distribution network loss reduction method, system, device and medium, including: obtaining power generation data of distributed power sources and power data of a substation in a distribution network connected to the distributed power sources; based on the power data, using a quantitative analysis method to determine the line loss impact factor of the distribution network connected to the distributed power sources; calculating power loss data according to the power generation data of the distributed power sources and the line loss impact factor of the distribution network connected to the distributed power sources; based on the power loss data, using a power flow algorithm to reduce the loss of the distribution network connected to the distributed power sources; the present application mines the power loss data of the distributed power sources by combining the power generation data of the distributed power sources and the power data of a substation in a distribution network connected to the distributed power sources, and finally reduces the loss of the distribution network according to the power loss data, which is beneficial to optimizing the configuration of the distributed power sources, so that the distributed power sources can fully play their role in reducing network losses and supporting voltage, and make the operation of the distribution network more reliable and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] Figure 1 A schematic diagram of a flow chart of a method for reducing losses in a distribution network provided by the present invention;

[0083] Figure 2 A schematic diagram of a model of a distribution network not connected to a distributed power source in a distribution network loss reduction method provided by the present invention;

[0084] Figure 3 A schematic diagram of a model of a distribution network connected to a distributed power source in a distribution network loss reduction method provided by the present invention;

[0085] Figure 4 A schematic diagram of a curve showing a change in the network loss load of a distributed power source connected to the distribution network in the loss reduction of the distribution network provided by the present invention;

[0086] Figure 5A schematic diagram of the structure of a distribution network loss reduction system provided by the present invention;

[0087] Figure 6 A schematic diagram of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0088] The present invention provides a method for reducing losses in a distribution network. The specific implementation manner of the present invention is further described in detail below with reference to the accompanying drawings.

[0089] Embodiment 1:

[0090] A flow chart of a method for reducing losses in a distribution network is shown in FIG. Figure 1 As shown, including:

[0091] Step 1: Obtain the power generation data of the distributed power source and the power data of the distribution network connected to the distributed power source;

[0092] Step 2: Based on the power data, using a quantitative analysis method, determine the line loss impact factor of the distribution network connected to the distributed power source;

[0093] Step 3: Calculate the power loss data based on the power generation data of the distributed power source and the line loss impact factor of the distribution network connected to the distributed power source;

[0094] Step 4: Based on the power loss data, use the power flow algorithm to reduce the loss of the distribution network connected to the distributed power generation.

[0095] For example, the power generation data of the distributed power source in the above step 1 may include one or more of the following: power generation, power generation efficiency and energy consumption data;

[0096] For example, the power data of the above-mentioned distribution network connected to the distributed power source may include one or more of the following: the line unit length resistance of the distribution network connected to the distributed power source, the distance between the distributed power source access location and the substation system, the active power consumed by the distributed power source load, the active power output by the distributed power source and the line length of the distribution network connected to the distributed power source;

[0097] In order to ensure the accuracy, real-time and reliability of the collected power generation data of the distributed power source and the power data of the distribution network connected to the distributed power source, the present invention can acquire data through the following methods: Internet of Things (IoT) sensors, data acquisition and monitoring systems (SCADA), smart meters and power acquisition systems, etc.; wherein, the current, voltage, temperature of photovoltaic panels, the operating status of inverters, and environmental factors such as light intensity, wind speed, etc. can be collected through IoT sensors, and these sensors are usually connected to IoT gateways, which are responsible for data aggregation and transmission; SCADA systems are used to remotely monitor and control distributed power source sites, collect key operating parameters, and send these data to the central monitoring system for analysis; smart meters can record real-time power usage, including power generation, consumption, power fed back to the power grid, active power, reactive power, voltage, current, power factor and other data, and they can be installed at the outlet of distributed power sources, as well as at various key points of the distribution network, such as substation outlets, line branch points, etc. They usually have communication functions and can send data to the central database regularly. When collecting energy consumption data from the power collection system, including synchronous generators, asynchronous generators, converters and other types of power sources, the energy types covered may include solar energy, natural gas, biomass energy, wind energy, hydropower, hydrogen energy, geothermal energy, ocean energy, comprehensive resource utilization power generation (including coal mine gas power generation) and energy storage and other energy types of power data; when collecting the power generation data of distributed power sources in each substation, the power generation type, power generation, and grid-connected power data of local 35kV and below power plants and centralized dispatching power plants can also be obtained from the planning system. In the subsequent loss reduction calculation, external power data may also be involved. The types of regional external power and various types of external power data can be collected through inter-provincial transactions and regional sharing;

[0098] In one implementation, the process of determining the line loss impact factor of the distribution network connected to the distributed power source based on the power data and using a quantitative analysis method in the above step 2 may include:

[0099] According to the power data, the line loss power of the substation area is obtained;

[0100] Quantitatively analyze the line loss electricity in the substation area, and determine the line loss influencing factors of the distribution network connected to the distributed power source based on the quantitative analysis results;

[0101] For example, the above-mentioned line loss influencing factors may include one or more of the following: distributed power source access location, distributed power source access capacity, power information and transmission line operation efficiency.

[0102] In this implementation, the present invention uses a quantitative analysis method (such as correlation analysis, regression analysis, time series analysis or principal component analysis method) to simulate and calculate the influencing factors of line loss in the low-voltage distribution network, fully considers the volatility of new energy output, the difficulty of absorption and other factors, and combines the power generation characteristics of distributed power sources. By calculating and mining the influencing factors of the distributed power source on the line loss voltage and line loss rate, the correlation between the line loss rate of the platform area and the distributed power supply power is obtained, which is conducive to the refined management of the line loss of the distribution network, the identification of high line loss areas, the optimization of the network structure and operation strategy, and the rapid location of potential fault points in the distribution network, such as line aging, poor contact or power theft, thereby improving the fault response and repair efficiency and improving energy utilization. When simulating and calculating the line loss influencing factors of the low-voltage distribution network, the influence of changes in multiple indicator factors such as load capacity, power information, and transmission line operation efficiency on the load is considered to achieve the line loss evaluation of the distribution network containing distributed power sources. In addition, the present invention can simulate and calculate the line loss influencing factors by building a simulated distribution network loss reduction model. For example, by using power system simulation software (such as MATLAB Simulink, PowerWorld, etc.) to create a simulated distribution network loss reduction model, and selecting a suitable line loss calculation method, such as the maximum current method, the equivalent resistance method, the root mean square current method or the average current method, and applying it to the model, analyzing the impact of different line loss influencing factors on the line loss, and helping to locate specific problems in the operation of the power grid equipment, and outputting a load abnormality analysis report. The distribution network loss reduction model may include: a distribution network system, a data acquisition module, a processing module, a storage module, a data cloud platform, a power consumption calculation module, a loss reduction monitoring module, a loss reduction rate calculation module, an operation analysis module, a reactive power compensation module and a display module; wherein the distribution network system is the core of the entire simulation model, which simulates the physical structure and electrical characteristics of the distribution network. The data acquisition module is used to collect the operation data of the distribution network in real time or periodically, such as voltage, current, power, temperature and equipment status information. The data sources may include smart meters, sensors, SCADA systems or other monitoring devices. The processing module is used to clean, convert and pre-process the collected raw data in preparation for further analysis and calculation. The storage module is used to store the processed data and provide data support for subsequent analysis and backtracking. The data cloud platform is used to provide a centralized data management and analysis platform that supports big data processing and cloud computing capabilities, and can be used for remote access, sharing, collaboration of data, and deployment and expansion of models. The power consumption calculation module is used to use the power grid model and real-time data to calculate the actual power consumption and theoretical power consumption in the distribution network to determine the line loss. Different algorithms and models can be used, such as calculation methods based on circuit theory or machine learning prediction models.Loss reduction monitoring module: used to monitor the energy saving and loss reduction of the distribution network system and obtain relevant information of the distribution equipment; the loss reduction rate calculation module is used to calculate the data results of the loss reduction rate of the distribution network system, and can monitor the line loss of the distribution network in real time, compare with historical data and loss reduction targets, and identify line loss anomalies and potential optimization opportunities; loss reduction rate calculation module: used to calculate the line loss changes before and after the implementation of loss reduction measures, quantify the loss reduction effect, and evaluate the economic benefits and engineering feasibility of different loss reduction strategies; operation analysis module: used to conduct a comprehensive analysis of the operating status of the distribution network, including stability, reliability, efficiency, etc.; reactive power compensation module: used to Used to adjust the reactive power compensation of the equipment in the distribution network system to ensure its steady and efficient operation; Display module: used to visualize the data analysis results in the form of charts, dashboards, etc., to facilitate user understanding and operation, for example, it can include real-time monitoring interface, historical trend chart, alarm system, etc. In addition, the distribution network loss reduction model can also be used to collect the installed capacity, historical power consumption information and daily power consumption information of distributed power sources in the substation area to determine whether the distribution equipment is operating normally, and obtain information related to the operation of the distribution equipment; These modules together constitute a comprehensive distribution network loss reduction analysis system, which optimizes power grid performance through data-driven methods. In practical applications, the scalability, security and integration capabilities of the system with other systems also need to be considered to ensure that the model can adapt to the development needs of the future distribution network. For example, when considering the scalability of the system, the system can be designed to be modular, with each module responsible for a specific function. In this way, when the function needs to be expanded, only the relevant modules need to be added or updated without affecting the entire system. Cloud native technologies such as containerization, automation and microservices can also be used to achieve horizontal expansion of the system and quickly respond to load changes. In terms of security, data integrity and system continuity can be ensured by designing redundancy and backup strategies, including data backup, disaster recovery plans and high-availability clusters. In terms of integration capabilities, data synchronization and sharing mechanisms can be designed to ensure the consistency and real-time nature of data among multiple systems, and open standards and protocols can be used for data exchange to improve interoperability with other systems. For example, the open standards and protocols used above can be: MQTT (Message Queuing Telemetry Transport), AMQP (Advanced Message Queuing Protocol), RESTful API (Representational State Transfer API). ;

[0103] When simulating and calculating the line loss of the low-voltage distribution network, by analyzing the different line loss effects that can be generated after the distributed power source is connected to different load distribution states, the power loss data, the total line loss on the power supply line of the distribution network connected to the distributed power source, and the line loss change amount and line loss change rate generated on the power supply line of the distribution network connected to the distributed power source can be calculated. For example, the power loss data in the above step 3 may include: power loss data between the distribution network connected to the distributed power source and the distributed power source, and power loss data between the distributed power source and the load;

[0104] For example, the calculation formula corresponding to the power loss data between the distribution network connected to the distributed power source and the distributed power source is as follows:

[0105]

[0106] Among them, Loss A It represents the power loss data between the distribution network connected to the distributed power source and the distributed power source; r represents the line unit length resistance of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; P L Indicates the active power consumed by the distributed generation load; P G Indicates the active power output of distributed power supply; Q L Indicates the reactive power consumed by distributed power load; Q G represents the reactive power output by the distributed power source; V represents the operating voltage of the distribution network connected to the distributed power source; a represents the first coefficient, preferably, a=2; b represents the second coefficient, preferably, b=2; c represents the third coefficient, preferably, c=3; I s Indicates the single-phase current output by the substation system power supply, I s =I L +I G , I L Indicates the single-phase current flowing into the load, I G Represents the single-phase current output by the distributed power supply.

[0107] For example, the calculation formula corresponding to the power loss data between the above distributed power source and the load is as follows:

[0108]

[0109] Among them, Loss B Represents the power loss data between the distributed generation and the load; r represents the line resistance per unit length of the distribution network connected to the distributed generation; Len represents the line length of the distribution network connected to the distributed generation; G represents the distance from the distributed generation access location to the substation system; P L Indicates the active power consumed by the distributed power load; QL represents the reactive power consumed by the distributed power load; c represents the third coefficient; V represents the operating voltage of the distribution network connected to the distributed power; I L Indicates the single-phase current flowing into the load.

[0110] For example, the calculation formula corresponding to the total line loss on the power supply line of the distribution network connected to the distributed power source is as follows:

[0111]

[0112] Among them, Loss2 represents the total line loss on the power supply line of the distribution network connected to the distributed power source; Loss A Represents the power loss data between the distribution network connected to the distributed power source and the distributed power source; Loss B Represents the power loss data between the distributed generation and the load; r represents the line resistance per unit length of the distribution network connected to the distributed generation; Len represents the line length of the distribution network connected to the distributed generation; G represents the distance from the distributed generation access location to the substation system; P L Indicates the active power consumed by the distributed generation load; P G It represents the active power output of distributed power source; QL represents the reactive power consumed by distributed power source load; Q G Represents the reactive power output by the distributed power source; V represents the operating voltage of the distribution network connected to the distributed power source;

[0113] For example, the calculation formula corresponding to the line loss change amount generated on the power supply line of the distribution network connected to the distributed power source is as follows:

[0114]

[0115] For example, the calculation formula of the line loss change rate of the above-mentioned distribution network connected to the distributed power source is as follows:

[0116]

[0117] Among them, Loss Δ Indicates the change in line loss on the power supply line of the distribution network connected to the distributed power source; Loss2 indicates the total line loss on the power supply line of the distribution network connected to the distributed power source; Loss1 indicates the power loss of the system; Loss λ represents the line loss change rate of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; Len represents the line length of the distribution network connected to the distributed power source; P L Indicates the active power consumed by the distributed power load; Q L Represents the reactive power consumed by distributed power load; P GIndicates the active power output of distributed power supply; Q G Represents the reactive power output by distributed generation.

[0118] In this implementation, the process of evaluating the line loss of the distribution network by using the line loss change amount and line loss change rate of the distribution network connected to the distributed power source may include:

[0119] When Loss Δ >0, the introduction of distributed power can reduce line loss. Conversely, when Loss Δ <0, the introduction of distributed generation increases the line loss of the original line; when the distributed generation access capacity P G <2mP L When, Loss λ When <0, the access of distributed power sources helps to reduce line losses, among which, cosθ represents the power factor of the distributed power source, cosψ represents the power factor of the load, G represents the distance from the distributed power source access location to the substation system, Len represents the line length of the distribution network connected to the distributed power source, m represents the definition coefficient, and n represents the multiple coefficient; by evaluating the line loss of the distribution network based on the line loss change and line loss change rate of the distribution network connected to the distributed power source, it can help grid operators understand the impact of the access of distributed power sources on the distribution network, thereby optimizing network planning and operation strategies. For example, if the access of distributed power sources significantly reduces the line loss in a specific area, the grid operator can consider adjusting the access location or access capacity of the distributed power source to maximize this benefit.

[0120] In one implementation, by comprehensively considering the above-mentioned Loss A 、Loss B and Loss λ , it can achieve loss reduction for the distribution network connected to distributed power sources, and effectively support the implementation of management loss reduction, technical loss reduction, load measurement and other tasks.

[0121] For example, in the above step 4, the power loss data Loss between the distribution network connected to the distributed power source and the distributed power source is obtained. A , to reduce the loss of the distribution network, the specific process of determining the practical solution for reducing line loss may include:

[0122] According to the power loss data between distributed generation and load, the power flow data of distribution network is calculated by using the forward-backward substitution method in the power flow algorithm;

[0123] According to the power flow data, the structure and power flow distribution changes of the distribution network connected to the distributed power sources are obtained with the goal of maximizing the access capacity of the distributed power sources in the line loss influencing factors;

[0124] According to the structure and power flow distribution changes of the distribution network connected to the distributed power source, the loss of the distribution network connected to the distributed power source is reduced. In this example, the forward back-substitution method used is a power flow calculation method for radial distribution networks, which is suitable for calculating the power flow data of the distribution network containing distributed power sources. The specific process may include: forward calculation part and back-substitution calculation part, wherein the forward calculation part includes:

[0125] (1) Calculate the injected power: For each node, calculate the injected power of the node (including the output power of the distributed generation and the power consumption of the load);

[0126] (2) Forward voltage: Starting from the end node of the network and moving forward, the voltage and injected current are calculated node by node;

[0127] (3) Repeat calculation: Calculate the voltage and injected current of each node in turn along the feeder direction until reaching the power node.

[0128] The back-substitution calculation part includes:

[0129] (1) Back-substitution of voltage: Starting from the power node, back-substitution to the end node, recalculating the voltage of each node;

[0130] (2) Repeat the calculation: Update the voltage of each node in turn along the reverse direction of the feeder until the voltages of all nodes converge.

[0131] Through the above steps, the forward-backward method can be used to effectively calculate the power flow data of the distribution network, which is very important for analyzing the operating status of the distribution network and optimizing the access location and capacity of distributed power sources.

[0132] Based on the total power flow data obtained by the above method, by setting the access capacity of the distributed power source to the maximum target, and considering the distance (km) between the access location of the distributed power source and the substation system, the single-phase current output by the substation system power source, the single-phase current output by the distributed power source, the single-phase current flowing into the load, the active power consumed by the load, the reactive power consumed by the load, the phase voltage on the system power supply line, and the unit length resistance of the distribution network line, etc., the corresponding calculation formula of the power loss data between the distribution network connected to the distributed power source is calculated. Through the analysis of the calculation results, it is concluded that after the distributed power source is connected to the traditional distribution network, the current changes from the original one-way flow to the two-way flow, the structure and flow distribution of the distribution network change, and the line loss of the power grid will inevitably be affected accordingly. When the capacity of the distributed power source is greater than the load of the access node, the transmission distance of the electric energy will be shortened, thereby reducing the line loss and ensuring that the distribution network system can operate in a stable and efficient state.

[0133] For example, the above-mentioned power loss data Loss between the distributed power source and the load B , the loss of the distribution network connected to the distributed power source is reduced, and the specific process of determining the practical solution for reducing line loss may include:

[0134] According to the power loss data between distributed generation and load, the Newton-Raphson method in the power flow algorithm is used to calculate the power loss of the branch of the distribution network connected to the distributed generation;

[0135] According to the branch power loss and the preset loss reduction constraint conditions, with the goal of maximizing the distributed power access capacity in the line loss influencing factor, the reactive power compensation data of the distribution network is obtained;

[0136] According to the reactive power compensation data, the loss of the distribution network connected to the distributed power source is reduced;

[0137] In this example, the Newton-Raphson method is first used to calculate the branch power loss of the distribution network, which can handle the access of distributed power sources well, including its uncertainty and intermittent characteristics, which is particularly important for modern distribution networks. Based on the obtained branch power loss, and by selecting a typical representative day, the access capacity of distributed power sources is set to the maximum as the target. At the same time, the voltage constraints of the distribution network nodes, the capacity constraints of distributed power sources, the power factor constraints, the load capacity constraints of the transformer, the switching constraints of the reactive compensation device, etc. are substituted into the calculation formula of the power loss data between the distributed power source and the load for calculation; for the power loss data Loss between the distributed power source and the load B The calculation results are used to generate load measurement and theoretical line loss calculation and analysis reports to support business applications such as power grid line loss diagnosis and high-loss component full-process management tracking. The calculation results are analyzed to show that the closer the location of the distributed power supply access system is to the load, the more obvious the effect of reducing line losses will be; and the operating mode of the distributed power supply is related to the power factor of the system. The operating mode is related to the distributed power supply of the synchronous motor to the power grid to transmit active power and reactive power to support the voltage. It is recommended to take measures such as equipment replacement, reactive power optimization, and grid reconstruction to enable the distribution network system to operate in a stable and efficient manner, thereby avoiding and reducing technical line loss electricity.

[0138] For example, the above-mentioned line loss change rate Loss of the distribution network connected to the distributed power source λ , the loss of the distribution network connected to the distributed power source is reduced, and the specific process of determining the practical solution for reducing line loss may include:

[0139] According to the power loss data, the fast decoupling method in the power flow algorithm is used to calculate the power flow distribution data of the distribution network connected to the distributed power source;

[0140] According to the power flow distribution data, the line loss change rate and line loss change amount of the distribution network connected to the distributed power source are calculated;

[0141] According to the line loss change rate and line loss change amount, the weak links of the distribution network connected to the distributed power source are obtained;

[0142] According to the weak links of the operation of the distribution network connected to the distributed power source, the loss of the distribution network connected to the distributed power source is reduced;

[0143] The power flow distribution data includes one or more of the following: the distance between the access location of the distributed power source and the substation system, the line length of the distribution network connected to the distributed power source, the active power consumed by the distributed power source load, the reactive power consumed by the distributed power source load, the active power output by the distributed power source, and the reactive power output by the distributed power source;

[0144] Operational weaknesses include one or more of the following: the access location of the distributed generation, the operation mode of the distributed generation, and the access capacity of the distributed generation;

[0145] In this example, the power flow distribution data of the distribution network is calculated by the fast decoupling method, which can not only improve the computing efficiency, but also better handle the access of large-scale systems and distributed power sources, and can predict the impact of future load growth or distributed power access on the network. In addition, the present invention evaluates the line loss results of the distribution network based on the line loss change and the line loss change rate, and analyzes the weak points of line loss during the operation of the power grid. Through the implementation plan of grid transformation and equipment operation optimization, it is beneficial to optimize the structure and operation mode of the distribution network, improve the stability and reliability of the power grid, reduce the probability of failure, and can accurately evaluate the actual status and performance of power grid assets, which is helpful to reasonably plan power grid upgrades and maintenance plans.

[0146] In summary, the present invention aims at the problem that the indirectness and volatility of distributed power sources lead to increased line loss in the distribution network connected to the distributed power sources, and proposes a distribution network loss reduction method. By combining the power generation data of the distributed power sources and the power data of the distribution network connected to the distributed power sources, the power loss data of the distributed power sources is mined, and finally the distribution network is reduced according to the power loss data. In the process of reducing the loss of the distribution network, the line loss change rate Loss generated on the power supply line of the distribution network after the distributed power sources are connected is analyzed. λ , and combined with Loss A 、Loss BThe calculation results of Loss2 are used to apply digital intelligence technology to the field of distribution network loss reduction, and finally accurately locate the operation problems of power grid equipment, form load abnormality analysis reports and line loss online analysis reports, identify the reasons that affect the operation of equipment, and provide a basis for subsequent optimization and transformation. Through the analysis of the calculation results, it is concluded that the access of distributed power sources has an important influence on the line loss of the distribution network, and is mainly affected by factors such as the access location of the distributed power source, the operation mode and the capacity of the distributed power source relative to the load. Among them, when the capacity of the distributed power source is greater than the load of the access node, the transmission distance of the electric energy will be shortened, and the effect of reducing the line loss will be more obvious; when the distributed power source operates in a lagging power factor mode to support the system voltage, the effect is better than that of operating in an advanced power factor, and the loss reduction effect will be more significant; when the distributed power source is configured at the end of the transmission line and close to the load position, it can reduce the loss of the system network during operation. By using the method of building a system in the above example to reduce the loss of the distribution network, and targeting the implementation scenario of reducing network losses by changing multiple indicator factors, it is learned that when optimizing system operation, the distributed power supply configuration can be optimized to give full play to the role of distributed power supply in reducing network losses and supporting voltage, making the operation of the distribution network more reliable and safe, and being able to solve the technical problems such as the increasing number of access to multiple loads under the background of the continuous advancement of new power systems, the lack of effective means for the coordinated linkage of various types of heterogeneous equipment, and the inability to fully tap the loss reduction capabilities, resulting in poor power supply quality of the power grid.

[0147] Embodiment 2:

[0148] A distribution network loss reduction method provided by the present invention is illustrated by a specific embodiment. First, the network data of the distribution network containing distributed power sources is obtained, which specifically includes: (1) collecting energy consumption data from the power collection system, such as synchronous generators, asynchronous generators, converters and other types of power sources; (2) obtaining data related to the power generation type, power generation, and online power of local 35kV and below power plants and centralized power plants from the planning system; (3) obtaining the rated capacity, wiring topology, load capacity, number of distributed power sources planned to be connected and power information of the distribution station area, which can be achieved through the collection of smart meters installed by the State Grid Corporation of China, and the data is summarized in the power consumption information system.

[0149] After obtaining the network data of the distribution network containing distributed power sources, the power data of the distributed power sources in the substation area (such as the installed capacity of the distributed power sources in the substation area, historical power consumption information and daily power consumption information) are collected through the simulation system to determine whether the distribution equipment is operating normally, and at the same time obtain the distribution equipment operation related data; for example, the distribution equipment operation related data may include: operation status data (such as hot standby status data, cold standby status data and maintenance status data, etc.), equipment parameters and performance data (such as voltage, current, power, power factor and temperature, etc.) and operation records and statistical data (such as operating time, number of starts, fault records and maintenance records, etc.);

[0150] For example, whether the above power distribution equipment operates normally may include the following determination methods:

[0151] Data comparison and analysis: Compare the current day’s electricity usage information with historical electricity usage information to check for abnormal power fluctuations, such as sudden large increases or decreases that may indicate equipment failure or abnormal operation.

[0152] Load forecasting and deviation analysis: Use historical data to build a load forecasting model, compare the predicted values ​​with the actual values, and analyze deviations. For example, deviations outside the normal range may indicate abnormal equipment operation.

[0153] Real-time monitoring and threshold alarm: The simulation system monitors key parameters in real time, such as voltage, current, power, etc. Once these parameters exceed the preset normal operating threshold, the system will trigger an alarm to indicate that there may be problems with the equipment.

[0154] Condition assessment algorithms: Combine the physical model of the equipment with the operating data and use algorithms to assess the condition of the equipment, such as through machine learning models, fault diagnosis algorithms, or expert systems, to identify changes in the health of the equipment.

[0155] The above distribution network data, the power data of the distributed power supply in the substation area and the distribution equipment operation related data are respectively input into Figure 2 The distribution system model without distributed generation is shown in Figure 3 The distribution system model connected to distributed power generation is shown in the figure. Figure 2 The distribution system model without distributed power generation in the paper consists of two parts: substation and load. The end of the power supply line in the substation is connected to the load. The length of the power supply line is represented by L, and the single-phase current flowing into the load is represented by I. L express; Figure 3The distribution system model connected to distributed generation in the paper consists of substation, load and distributed generation (DG). Distributed generation is connected between substation and load. The length of the power supply line is represented by L, and the single-phase current flowing into the load is represented by I. L Indicates that the single-phase current output by the distributed power supply is I G Indicates that the substation system power supply output single-phase current adopts I s Indicated by G; the distance between the distributed power source access location and the substation system is indicated by G. Load access to the system will cause network loss. The size of the loss on a branch of the system depends on the current flowing through the branch and the resistance of the branch. Therefore, reducing the resistance of the branch and the current flowing through can achieve the purpose of reducing the loss. Introducing distributed power on the load side can reduce the current on the system branch, so the loss on the branch can be reduced.

[0156] When simulating and calculating the line loss of the low-voltage distribution network, by analyzing the distribution states of distributed power sources connected to different loads, the power loss data between the distribution network connected to the distributed power source and the distributed power source, the power loss data between the distributed power source and the load, the total line loss on the power supply line of the distribution network connected to the distributed power source, and the line loss change amount and line loss change rate generated on the power supply line of the distribution network connected to the distributed power source can be calculated;

[0157] For example, the power loss data between the distribution network connected to the distributed power source and the distributed power source can be calculated by the following calculation formula:

[0158]

[0159] Among them, Loss A It represents the power loss data between the distribution network connected to the distributed power source and the distributed power source; r represents the line unit length resistance of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; P L Indicates the active power consumed by the distributed generation load; P G Indicates the active power output of distributed power supply; Q L Indicates the reactive power consumed by distributed power load; Q G Represents the reactive power output by the distributed power source; V represents the operating voltage of the distribution network connected to the distributed power source; I s Indicates the single-phase current output by the substation system power supply, I s =I L +I G , I L Indicates the single-phase current flowing into the load, I G Represents the single-phase current output by the distributed power supply.

[0160] For example, the power loss data between the above distributed generation and the load can be calculated by the following calculation formula:

[0161]

[0162] Among them, Loss B Represents the power loss data between the distributed generation and the load; r represents the line resistance per unit length of the distribution network connected to the distributed generation; Len represents the line length of the distribution network connected to the distributed generation; G represents the distance from the distributed generation access location to the substation system; P L Indicates the active power consumed by the distributed power load; Q L Represents the reactive power consumed by the distributed power load; V represents the operating voltage of the distribution network connected to the distributed power; I L Indicates the single-phase current flowing into the load.

[0163] For example, the total amount of line loss on the power supply line of the distribution network connected to the distributed power source can be calculated by the following calculation formula:

[0164]

[0165] Among them, Loss2 represents the total line loss on the power supply line of the distribution network connected to the distributed power source; Loss A Represents the power loss data between the distribution network connected to the distributed power source and the distributed power source; Loss B Represents the power loss data between the distributed generation and the load; r represents the line resistance per unit length of the distribution network connected to the distributed generation; Len represents the line length of the distribution network connected to the distributed generation; G represents the distance from the distributed generation access location to the substation system; P L Indicates the active power consumed by the distributed generation load; P G It represents the active power output of distributed power source; QL represents the reactive power consumed by distributed power source load; Q G Represents the reactive power output by the distributed power source; V represents the operating voltage of the distribution network connected to the distributed power source;

[0166] For example, the line loss variation generated on the power supply line of the distribution network connected to the distributed power source can be calculated by the following calculation formula:

[0167]

[0168] For example, the line loss change rate of the above-mentioned distribution network connected to the distributed power source can be calculated by the following calculation formula:

[0169]

[0170] Among them, Loss Δ Indicates the change in line loss on the power supply line of the distribution network connected to the distributed power source; Loss2 indicates the total line loss on the power supply line of the distribution network connected to the distributed power source; Loss1 indicates the power loss of the system; Loss λ represents the line loss change rate of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; Len represents the line length of the distribution network connected to the distributed power source; P L Indicates the active power consumed by the distributed power load; Q L Represents the reactive power consumed by distributed power load; P G Indicates the active power output of distributed power supply; Q G Represents the reactive power output by distributed generation.

[0171] The process of evaluating the line loss of the distribution network by measuring the line loss change and line loss change rate of the distribution network connected to the distributed power source may include:

[0172] When Loss Δ >0, the introduction of distributed power can reduce line loss. Conversely, when Loss Δ <0, the introduction of distributed generation increases the line loss of the original line; when the distributed generation access capacity P G <2mP L When, Loss λ When <0, the access of distributed generation helps to reduce line loss. The change law of line loss rate with the access capacity of distributed generation is shown in Table 1, where m represents the definition coefficient, dP G Indicates the change in active power;

[0173] Table 1 Line loss change rate with distributed generation access capacity

[0174]

[0175] Importing the acquired data information into a database, and the database after acquiring the information sends a display request to the display module;

[0176] By comprehensively considering the power loss data between the distribution network connected to the distributed power source, the power loss data between the distributed power source and the load, and the line loss change rate of the distribution network connected to the distributed power source, we explore how to effectively support the implementation of management loss reduction, technical loss reduction, load measurement and other tasks.

[0177] Power loss data between the distribution network connected to the distributed power source and the distributed power source Loss A, practical solutions to reduce line losses can be explored through technical means, including: assuming that the maximum access capacity of distributed power sources is set as the target, and considering the distance (km) between the access location of distributed power sources and the substation system, the single-phase current output by the substation system power source, the single-phase current output by the distributed power source, the single-phase current flowing into the load, the active power consumed by the load, the reactive power consumed by the load, the phase voltage on the system power supply line, and the resistance per unit length of the distribution network line, etc., and substituting the corresponding calculation formula for the power loss data between the distribution network connected to the distributed power source and the distributed power source for calculation, the power loss Loss between the system power source and the distributed power source after the distributed power source is connected can be displayed. A Through the analysis of the calculation results, it is concluded that after the distributed power source is connected to the traditional distribution network, the current changes from the original one-way flow to two-way flow, the structure and power flow distribution of the distribution network change, and the line loss of the power grid will inevitably be affected accordingly. When the capacity of the distributed power source is greater than the load of the access node, the transmission distance of the electric energy will be shortened, thereby reducing the line loss and ensuring that the distribution network system can operate in a stable and efficient manner.

[0178] For the power loss between distributed generation and load B The calculation results generate load measurement and theoretical line loss calculation and analysis reports to support business applications such as power grid line loss diagnosis and high-loss component full-process management tracking. Specifically, it can include: selecting a typical representative day of load, assuming that the maximum access capacity of distributed power sources is set as the target, and considering the distribution network node voltage constraints, distributed power source capacity constraints, power factor constraints, transformer load capacity constraints, and switching constraints of reactive power compensation devices, etc., and substituting them into the calculation formula corresponding to the power loss data between distributed power sources and loads for calculation, the output of distributed power sources is shown in Table 2:

[0179] Table 2: Distributed power output

[0180]

[0181] Through the analysis of the calculation results, it is known that the closer the location of the distributed power supply access system is to the load, the more obvious the effect of reducing line loss is; the operation mode of the distributed power supply is related to the power factor of the system, and the operation mode and the distributed power supply of the synchronous motor transmit active power and reactive power to the power grid to support the voltage. Equipment replacement, reactive power optimization, and grid reconstruction measures can be selected to enable the distribution network system to operate in a stable and efficient state, thereby avoiding and reducing technical line loss. The present invention evaluates the line loss results of the distribution network based on the line loss change and the line loss change rate, analyzes the weak points of line loss during the operation of the power grid, and explores the implementation plan of grid transformation and equipment operation optimization, which is conducive to optimizing the structure and operation mode of the distribution network, improving the stability and reliability of the power grid, reducing the probability of failure, and accurately evaluating the actual status and performance of the power grid assets, which is helpful to reasonably plan the power grid upgrade and maintenance plan.

[0182] In addition, by analyzing the line loss change rate Loss generated on the distribution network power supply line after connecting to the distributed power supply λ , combined with Loss A 、Loss B And Loss2 calculation results, can finally form the following Figure 4 The line loss online analysis diagram shown in the figure can then identify the reasons affecting the operation of the equipment and provide a basis for subsequent optimization and transformation. Figure 4 By analyzing the calculation results, it can be concluded that the access of distributed power sources has an important influence on the power transmission and distribution network loss, and is mainly affected by factors such as the access location of the distributed power sources, the operating mode and the capacity of the distributed power sources relative to the load. Among them, when the capacity of the distributed power source is greater than the load of the access node, the transmission distance of the electric energy will be shortened, and the effect of reducing line loss will be more obvious; when the distributed power source operates with a lagging power factor to support the system voltage, the effect is greater than that of operating with an advanced power factor, and the loss reduction effect will be more significant; when the distributed power source is configured at the end of the transmission line and close to the load position, the loss of the system network during operation can be reduced.

[0183] Embodiment 3:

[0184] The present invention based on the same inventive concept also provides a distribution network loss reduction system, the structural composition diagram is as follows Figure 5 As shown, including:

[0185] The power data acquisition module is used to acquire the power generation data of the distributed power source and the power data of the substation in the distribution network connected to the distributed power source;

[0186] The line loss impact calculation module is used to determine the line loss impact factor of the distribution network connected to the distributed power source based on the power data and using the quantitative analysis method;

[0187] A power loss calculation module, used to calculate power loss data based on the power generation data of the distributed power source and the line loss influence factor of the distribution network connected to the distributed power source;

[0188] The distribution network loss reduction module is used to reduce the loss of the distribution network connected to the distributed power source based on the power loss data and using the power flow algorithm.

[0189] In a possible implementation, the power generation data of the distributed power source in the power data acquisition module includes one or more of the following: power generation, power generation efficiency and energy consumption data;

[0190] In a possible implementation, the power data of the substation in the distribution network connected to the distributed power source includes one or more of the following: the line unit length resistance of the distribution network connected to the distributed power source, the distance between the access location of the distributed power source and the substation system, the active power consumed by the distributed power source load, the active power output by the distributed power source, and the line length of the distribution network connected to the distributed power source;

[0191] In a possible implementation manner, the power loss data includes: power loss data between a distribution network connected to the distributed power source and the distributed power source, and power loss data between the distributed power source and the load.

[0192] Line loss impact calculation module, specifically used for:

[0193] According to the power data, the line loss power of the substation area is obtained;

[0194] Quantitatively analyze the line loss electricity in the substation area, and determine the line loss influencing factors of the distribution network connected to the distributed power source based on the quantitative analysis results;

[0195] In one possible implementation, the line loss influencing factors include one or more of the following: the access location of the distributed power source, the access capacity of the distributed power source, power information and the operating efficiency of the transmission line.

[0196] The calculation formula corresponding to the power loss data between the distribution network connected to the distributed power source and the distributed power source is as follows:

[0197]

[0198] Among them, Loss A It represents the power loss data between the distribution network connected to the distributed power source and the distributed power source; r represents the line unit length resistance of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; P L Indicates the active power consumed by the distributed generation load; P G Indicates the active power output of distributed power supply; Q LIndicates the reactive power consumed by distributed power load; Q G It represents the reactive power output by the distributed power source; V represents the operating voltage of the distribution network connected to the distributed power source; a represents the first coefficient; b represents the second coefficient; c represents the third coefficient.

[0199] The calculation formula corresponding to the power loss data between distributed generation and load is as follows:

[0200]

[0201] Among them, Loss B Represents the power loss data between the distributed generation and the load; r represents the line resistance per unit length of the distribution network connected to the distributed generation; Len represents the line length of the distribution network connected to the distributed generation; G represents the distance from the distributed generation access location to the substation system; P L Indicates the active power consumed by the distributed power load; Q L represents the reactive power consumed by the distributed power load; c represents the third coefficient; V represents the operating voltage of the distribution network connected to the distributed power supply.

[0202] In a possible implementation manner, the distribution network loss reduction module is specifically used to:

[0203] According to the power loss data between the distributed power source and the load, the power flow direction data of the distribution network is calculated by using the forward-backward substitution method in the power flow algorithm;

[0204] According to the power flow data, with the goal of maximizing the access capacity of the distributed power source in the line loss influencing factor, the structure and power flow distribution changes of the distribution network accessed to the distributed power source are obtained;

[0205] According to the structure of the distribution network connected to the distributed power source and the changes in the power flow distribution, the loss of the distribution network connected to the distributed power source is reduced.

[0206] In a possible implementation manner, the distribution network loss reduction module is specifically used to:

[0207] According to the power loss data between the distributed power source and the load, the power loss of the branch of the distribution network connected to the distributed power source is calculated by using the Newton-Raphson method in the power flow algorithm;

[0208] According to the branch power loss and the preset loss reduction constraint condition, with the goal of maximizing the distributed power access capacity in the line loss influencing factor, obtaining reactive power compensation data of the distribution network;

[0209] According to the reactive power compensation data, the loss of the distribution network connected to the distributed power source is reduced.

[0210] In a possible implementation manner, the distribution network loss reduction module is specifically used to:

[0211] According to the power loss data, using the fast decoupling method in the power flow algorithm, the power flow distribution data of the distribution network connected to the distributed power source is calculated;

[0212] Calculating the line loss change rate and line loss change amount of the distribution network connected to the distributed power source according to the power flow distribution data;

[0213] According to the line loss change rate and the line loss change amount, the weak link of operation of the distribution network connected to the distributed power source is obtained;

[0214] According to the weak links in the operation of the distribution network connected to the distributed power source, reducing the loss of the distribution network connected to the distributed power source;

[0215] The power flow distribution data includes one or more of the following: the distance between the access location of the distributed power source and the substation system, the line length of the distribution network connected to the distributed power source, the active power consumed by the distributed power source load, the reactive power consumed by the distributed power source load, the active power output by the distributed power source, and the reactive power output by the distributed power source;

[0216] The operational weak links include one or more of the following: the access location of the distributed power source, the operating mode of the distributed power source, and the access capacity of the distributed power source.

[0217] The calculation formula for the line loss change rate of the distribution network connected to the distributed power source is as follows:

[0218]

[0219] Among them, Loss λ represents the line loss change rate of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; Len represents the line length of the distribution network connected to the distributed power source; P L Indicates the active power consumed by the distributed power load; Q L Represents the reactive power consumed by distributed power load; P G Indicates the active power output of distributed power supply; Q G It represents the reactive power output by the distributed power source; a represents the first coefficient; b represents the second coefficient.

[0220] Embodiment 4:

[0221] like Figure 6As shown, the present invention also provides an electronic device, which may be a computer device, a single-chip device, an intelligent mobile device, etc. The electronic device in this embodiment may include a processor, a memory, a transceiver component, etc. The memory, the processor, and the transceiver component are connected via a bus; the memory may be used to store an execution program, and an exemplary execution program may include instructions; the processor is used to execute the instructions stored in the memory. The memory may also be used to store data, which may be called and / or modified when the instructions are executed.

[0222] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in a storage medium to implement the corresponding method flow or corresponding functions, so as to implement the steps of a distribution network loss reduction method in the above-mentioned embodiment.

[0223] Embodiment 5:

[0224] Based on the same inventive concept, the present invention also provides a readable storage medium, specifically an electronic device readable storage medium (Memory), which is a memory device in an electronic device for storing programs and data. It can be understood that the storage medium here can include both built-in storage media in electronic devices and, of course, extended storage media supported by electronic devices. The storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by a processor are also stored in the storage space, and these instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor loads and executes one or more instructions stored in the storage medium, which can implement the steps of a distribution network loss reduction method in the above embodiment.

[0225] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0226] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0227] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0228] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0229] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the application, but these changes, modifications or equivalent substitutions are all within the protection scope of the claims to be approved.

Claims

1. A method for reducing losses in a distribution network, characterized in that: include: Obtaining power generation data of distributed power sources and power data of the substations in the distribution network connected to the distributed power sources; Based on the power data, using a quantitative analysis method, determining a line loss impact factor of the distribution network connected to the distributed power source; Calculating power loss data according to the power generation data of the distributed power source and the line loss impact factor of the distribution network connected to the distributed power source; According to the power loss data, a power flow algorithm is used to reduce the loss of a distribution network connected to the distributed power source.

2. The method according to claim 1, characterized in that The determining, based on the power data and using a quantitative analysis method, a line loss impact factor of the distribution network connected to the distributed power source comprises: According to the power data, obtaining the line loss power of the substation area; Quantitatively analyzing the line loss electricity of the substation area, and determining the line loss impact factor of the distribution network connected to the distributed power source according to the quantitative analysis result; Among them, the line loss influencing factors include one or more of the following: distributed power source access location, distributed power source access capacity, power information and transmission line operation efficiency.

3. The method according to claim 2, characterized in that The power generation data of the distributed power source includes one or more of the following: power generation, power generation efficiency and energy consumption data; The power data of the substation in the distribution network connected to the distributed power source includes one or more of the following: the line unit length resistance of the distribution network connected to the distributed power source, the distance between the access location of the distributed power source and the substation system, the active power consumed by the distributed power source load, the active power output by the distributed power source and the line length of the distribution network connected to the distributed power source; The power loss data includes: power loss data between a distribution network connected to a distributed power source and the distributed power source, and power loss data between the distributed power source and a load.

4. The method according to claim 3, characterized in that The method of reducing the loss of a distribution network connected to the distributed power source by using a power flow algorithm according to the power loss data includes: According to the power loss data between the distributed power source and the load, the power flow direction data of the distribution network is calculated by using the forward-backward substitution method in the power flow algorithm; According to the power flow data, with the goal of maximizing the access capacity of the distributed power source in the line loss influencing factor, the structure and power flow distribution changes of the distribution network accessed to the distributed power source are obtained; According to the structure of the distribution network connected to the distributed power source and the changes in the power flow distribution, the loss of the distribution network connected to the distributed power source is reduced.

5. The method according to claim 3, characterized in that The method of reducing the loss of a distribution network connected to the distributed power source by using a power flow algorithm according to the power loss data includes: According to the power loss data between the distributed power source and the load, the power loss of the branch of the distribution network connected to the distributed power source is calculated by using the Newton-Raphson method in the power flow algorithm; According to the branch power loss and the preset loss reduction constraint condition, with the goal of maximizing the distributed power access capacity in the line loss influencing factor, obtaining reactive power compensation data of the distribution network; According to the reactive power compensation data, the loss of the distribution network connected to the distributed power source is reduced.

6. The method according to claim 3, characterized in that The method of reducing the loss of a distribution network connected to the distributed power source by using a power flow algorithm according to the power loss data includes: According to the power loss data, using the fast decoupling method in the power flow algorithm, the power flow distribution data of the distribution network connected to the distributed power source is calculated; Calculating the line loss change rate and line loss change amount of the distribution network connected to the distributed power source according to the power flow distribution data; According to the line loss change rate and the line loss change amount, the weak link of operation of the distribution network connected to the distributed power source is obtained; According to the weak links in the operation of the distribution network connected to the distributed power source, reducing the loss of the distribution network connected to the distributed power source; The power flow distribution data includes one or more of the following: the distance between the access location of the distributed power source and the substation system, the line length of the distribution network connected to the distributed power source, the active power consumed by the distributed power source load, the reactive power consumed by the distributed power source load, the active power output by the distributed power source, and the reactive power output by the distributed power source; The operational weak links include one or more of the following: the access location of the distributed power source, the operating mode of the distributed power source, and the access capacity of the distributed power source.

7. The method according to claim 6, characterized in that The calculation formula of the line loss change rate of the distribution network connected to the distributed power source is as follows: Among them, Loss λ represents the line loss change rate of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; Len represents the line length of the distribution network connected to the distributed power source; P L Indicates the active power consumed by the distributed power load; Q L Represents the reactive power consumed by distributed power load; P G Indicates the active power output of distributed power supply; Q G It represents the reactive power output by the distributed power source; a represents the first coefficient; b represents the second coefficient.

8. The method according to claim 3, characterized in that The calculation formula corresponding to the power loss data between the distribution network connected to the distributed power source and the distributed power source is as follows: Among them, Loss A represents the power loss data between the distribution network connected to the distributed power source and the distributed power source; r represents the line resistance per unit length of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; P L Indicates the active power consumed by the distributed generation load; P G It represents the active power output of distributed power source; QL represents the reactive power consumed by distributed power source load; Q G It represents the reactive power output by the distributed power source; V represents the operating voltage of the distribution network connected to the distributed power source; a represents the first coefficient; b represents the second coefficient; c represents the third coefficient.

9. The method according to claim 8, characterized in that The calculation formula corresponding to the power loss data between the distributed power source and the load is as follows: Among them, Loss B Represents the power loss data between the distributed generation and the load; r represents the line resistance per unit length of the distribution network connected to the distributed generation; Len represents the line length of the distribution network connected to the distributed generation; G represents the distance from the distributed generation access location to the substation system; P L Indicates the active power consumed by the distributed power load; Q L represents the reactive power consumed by the distributed power load; c represents the third coefficient; V represents the operating voltage of the distribution network connected to the distributed power supply.

10. A distribution network loss reduction system, characterized in that: include: An electric quantity data acquisition module is used to acquire power generation data of a distributed power source and electric quantity data of a substation in a distribution network connected to the distributed power source; A line loss impact calculation module, used to determine the line loss impact factor of the distribution network connected to the distributed power source based on the power data and using a quantitative analysis method; A power loss calculation module, used to calculate power loss data according to the power generation data of the distributed power source and the line loss influence factor of the distribution network connected to the distributed power source; The distribution network loss reduction module is used to reduce the loss of the distribution network connected to the distributed power source according to the power loss data and using a power flow algorithm.

11. The system according to claim 10, characterized in that The line loss impact calculation module is specifically used for: According to the power data, obtaining the line loss power of the substation area; Quantitatively analyzing the line loss electricity of the substation area, and determining the line loss impact factor of the distribution network connected to the distributed power source according to the quantitative analysis result; Among them, the line loss influencing factors include one or more of the following: distributed power source access location, distributed power source access capacity, power information and transmission line operation efficiency.

12. The system according to claim 10, characterized in that The power generation data of the distributed power source in the power data acquisition module includes one or more of the following: power generation, power generation efficiency and energy consumption data; The power data of the substation in the distribution network connected to the distributed power source includes one or more of the following: the line unit length resistance of the distribution network connected to the distributed power source, the distance between the access location of the distributed power source and the substation system, the active power consumed by the distributed power source load, the active power output by the distributed power source and the line length of the distribution network connected to the distributed power source; The power loss data includes: power loss data between a distribution network connected to a distributed power source and the distributed power source, and power loss data between the distributed power source and a load.

13. The system of claim 12, wherein: The distribution network loss reduction module is specifically used for: According to the power loss data between the distributed power source and the load, the power flow direction data of the distribution network is calculated by using the forward-backward substitution method in the power flow algorithm; According to the power flow data, with the goal of maximizing the access capacity of the distributed power source in the line loss influencing factor, the structure and power flow distribution changes of the distribution network accessed to the distributed power source are obtained; According to the structure of the distribution network connected to the distributed power source and the changes in power flow distribution, the loss of the distribution network connected to the distributed power source is reduced.

14. The system of claim 12, wherein: The distribution network loss reduction module is specifically used for: According to the power loss data between the distributed power source and the load, the power loss of the branch of the distribution network connected to the distributed power source is calculated by using the Newton-Raphson method in the power flow algorithm; According to the branch power loss and the preset loss reduction constraint condition, with the goal of maximizing the distributed power access capacity in the line loss influencing factor, obtaining reactive power compensation data of the distribution network; According to the reactive power compensation data, the loss of the distribution network connected to the distributed power source is reduced.

15. The system of claim 12, wherein: The distribution network loss reduction module is specifically used for: According to the power loss data, using the fast decoupling method in the power flow algorithm, the power flow distribution data of the distribution network connected to the distributed power source is calculated; Calculating the line loss change rate and line loss change amount of the distribution network connected to the distributed power source according to the power flow distribution data; According to the line loss change rate and the line loss change amount, the weak link of operation of the distribution network connected to the distributed power source is obtained; According to the weak links in the operation of the distribution network connected to the distributed power source, reducing the loss of the distribution network connected to the distributed power source; The power flow distribution data includes one or more of the following: the distance between the access location of the distributed power source and the substation system, the line length of the distribution network connected to the distributed power source, the active power consumed by the distributed power source load, the reactive power consumed by the distributed power source load, the active power output by the distributed power source, and the reactive power output by the distributed power source; The operational weak links include one or more of the following: the access location of the distributed power source, the operating mode of the distributed power source, and the access capacity of the distributed power source.

16. The system of claim 15, wherein: The calculation formula of the line loss change rate of the distribution network connected to the distributed power source in the distribution network loss reduction module is as follows: Among them, Loss λ represents the line loss change rate of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; Len represents the line length of the distribution network connected to the distributed power source; P L Indicates the active power consumed by the distributed power load; Q L Represents the reactive power consumed by distributed power load; P G Indicates the active power output of distributed power supply; Q G It represents the reactive power output by the distributed power source; a represents the first coefficient; b represents the second coefficient.

17. The system of claim 12, wherein: The calculation formula corresponding to the power loss data between the distribution network connected to the distributed power source and the distributed power source in the power loss calculation module is as follows: Among them, Loss A represents the power loss data between the distribution network connected to the distributed power source and the distributed power source; r represents the line resistance per unit length of the distribution network connected to the distributed power source; G represents the distance between the distributed power source access location and the substation system; P L Indicates the active power consumed by the distributed generation load; P G Indicates the active power output of distributed power supply; Q L Indicates the reactive power consumed by distributed power load; Q G It represents the reactive power output by the distributed power source; V represents the operating voltage of the distribution network connected to the distributed power source; a represents the first coefficient; b represents the second coefficient; c represents the third coefficient.

18. The system of claim 17, wherein: The calculation formula corresponding to the power loss data between the distributed power source and the load in the power loss calculation module is as follows: Among them, Loss B Represents the power loss data between the distributed generation and the load; r represents the line resistance per unit length of the distribution network connected to the distributed generation; Len represents the line length of the distribution network connected to the distributed generation; G represents the distance from the distributed generation access location to the substation system; P L Indicates the active power consumed by the distributed power load; Q L represents the reactive power consumed by the distributed power load; c represents the third coefficient; V represents the operating voltage of the distribution network connected to the distributed power supply.

19. An electronic device, characterized in that: include: at least one processor and memory; The memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, a distribution network loss reduction method as claimed in any one of claims 1 to 9 is implemented.

20. A computing device readable storage medium, characterized in that: An execution program is stored thereon, and when the execution program is executed, a distribution network loss reduction method as described in any one of claims 1 to 10 is implemented.

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