Distributed power supply planning method and system

Abstract

The invention discloses a distributed power supply planning method and system, relates to the technical field of distributed power supplies, and solves the problems that in the prior art, whether a distributed power supply is additionally installed or not mainly depends on experience judgment of workers, quantitative data support is lacked, the working efficiency is low, and misjudgment is prone to occurring. The method comprises the following steps: firstly, collecting historical voltage data of a current area to judge whether the voltage has a voltage quality problem, if the deviation is greater than a limited range, recording the occurrence frequency and duration of the deviation, otherwise, collecting historical voltage data of a next area, and judging again; then, in an area where a voltage quality problem occurs, an optimal scheme is obtained by adopting a mode of solving an objective function, and the objective function comprehensively considers voltage quality benefits, benefits brought by residual electric quantity after voltage deviation is flattened, and power generation cost of the distributed power supply; the optimal scheme solved based on the method can provide a data reference for a manager to make a final decision.

Description

Technical Field

[0001] The present invention relates to the technical field of distributed power supply technology, and in particular to a distributed power supply planning method and system. Background Art

[0002] Voltage deviation refers to the relative deviation of the actual operating voltage from the nominal system voltage. Excessive voltage deviation can pose numerous risks to electrical equipment and the grid. For electrical equipment, voltage deviation can reduce efficiency or even damage it. For example, excessively high voltage can accelerate insulation aging in motors, reducing their service life; excessively low voltage can significantly increase motor current, potentially causing overheating or even burnout. Furthermore, voltage deviation can adversely affect lighting equipment, transformers, and shunt capacitors, increasing power consumption, reducing product quality, and even causing equipment damage. The integration of distributed power generation (DGs) can effectively alleviate voltage deviation issues. Distributed power generation (DGs) are located close to electricity users, enabling local provision of active power and reactive power compensation, reducing transmission losses. When DGs operate in coordination with local loads, they can mitigate system voltage deviations. This is especially true during sudden load changes. By adjusting the DGs' output power, they can compensate for or offset load power fluctuations, thereby stabilizing voltage. Furthermore, DGs equipped with reactive power compensation or energy storage devices can further improve voltage deviation in the distribution network.

[0003] While distributed generation (DG) offers significant advantages in improving voltage deviation, measuring its benefits in practical applications remains inadequate. Currently, the decision to install DGs relies primarily on staff experience, lacking quantitative data support. This experience-based approach leads to low efficiency and is prone to misjudgments. For example, failure to accurately assess the connection location and capacity of DGs can result in voltage deviation issues not being effectively addressed, and can even lead to new grid operational issues due to improper connection. Such inaccurate decisions not only impact the economic benefits of DGs but can also lead to grid instability, excessively increase grid operating costs, and ultimately increase overall system costs.

[0004] In view of this, a distributed power supply planning method and system are needed. Summary of the Invention

[0005] In the existing technology, whether to install distributed power sources mainly relies on the staff's experience and judgment, lacking quantitative data support. This experience-based approach leads to low work efficiency and is prone to misjudgment. The present invention provides a distributed power planning method and system that can comprehensively consider the voltage quality benefits, the benefits of the remaining power after smoothing voltage deviations, and the distributed power generation costs, providing managers with data reference when making decisions. The specific technical solution is as follows:

[0006] A distributed power planning method includes the following steps:

[0007] Collect historical voltage data for the current area to determine whether there are voltage quality problems. If the deviation is greater than the specified range, record the number of deviations and their duration. Otherwise, collect historical voltage data for the next area and make another judgment.

[0008] With the goal of maximizing benefits, an objective function is constructed. By solving the objective function, the optimal solution is obtained. The optimal solution includes whether to establish distributed power generation. The objective function is as follows:

[0009] max Z=C 电压质量 +C 电量冗余 -C 发电

[0010] Where Z is the benefit function, C 电压质量 is the voltage quality benefit, C 电量冗余 In order to smooth out the benefits of the remaining power after the voltage deviation, C 发电 is the power generation cost of distributed power generation.

[0011] Preferably, the steps for determining whether the voltage has a voltage quality problem are as follows:

[0012] First, calculate the voltage deviation. The voltage deviation is calculated as follows:

[0013]

[0014] Where V 偏差 is the voltage deviation (100%), V 实际 is the actual voltage, V 额定 is the rated voltage.

[0015] Then, the following standards are used to measure whether the voltage exceeds the allowable range. If the voltage exceeds the following range, it is considered a voltage quality problem:

[0016] The positive and negative allowable deviation of the power supply voltage of 35kV and above is 10% of the nominal voltage.

[0017] The allowable deviation of three-phase power supply voltage of 10kV and below is ±7% of the rated voltage.

[0018] The allowable deviation of 220V single-phase power supply voltage is: +7%, -10%.

[0019] Preferably, the voltage quality benefit is measured by the production interruption cost, C 电压质量 The calculation formula is as follows:

[0020] C 电压质量 =F 收入损失 +F停机_运营成本 +F 恢复成本 +F 机会成本

[0021] Where, F 收入损失 is the revenue loss during downtime caused by voltage deviation, F 停机_运营成本 is the operating cost during downtime caused by voltage deviation, F 恢复成本 F is the cost of restoring the system to its original state after shutdown. 机会成本 The potential opportunity cost during downtime caused by voltage deviation.

[0022] Preferably, C 电压质量 During the calculation process, each parameter is calculated by the following formula:

[0023] F 收入损失 = Average hourly revenue × downtime duration;

[0024] F 停机_运营成本 = (fixed cost + labor cost + utility cost) × downtime;

[0025] F 恢复成本 = Repair cost + Replacement cost + Overtime cost;

[0026] F 机会成本 = Potential revenue during downtime - Lost revenue.

[0027] Preferably, C 电量冗余 The calculation formula is as follows:

[0028] C 电量冗余 =R 电价 ×(Q 发电量 -Q V )

[0029] Where R 电价 is the real-time electricity price, Q 发电量 is the total power generation of distributed generation, Q V The amount of electricity required to smooth out voltage deviations.

[0030] Preferably, the power generation cost C of the distributed power generation is 发电 There are two possible costs: thermal power generation cost and wind power generation cost. The thermal power generation cost C 火电 The details are as follows:

[0031]

[0032] Where C n represents the cost expenditure in the nth year, Q n represents the electricity generated in the nth year, r represents the internal rate of return, or the discount rate, Q 火电_发电 is the output thermal power.

[0033] Wind power generation cost C 风电 The details are as follows:

[0034]

[0035] Among them, P dynamic_cost is the dynamic investment cost of the wind farm, T O&M is the operating time of the wind farm, D deprectation is the depreciation of fixed assets of wind farm, P O&M is the operation and maintenance cost of the wind farm, R tax is the income tax rate for wind farms, R discount is the discount rate, V restdualvaiue is the residual value of fixed assets of the wind farm, E annual is the annual power generation of the wind farm, Q 风电_发电 is the output wind power.

[0036] Preferably, the power generation cost C of the distributed power generation is 发电 There are three possible values for the cost of thermal power generation, wind power generation and photovoltaic power generation. The photovoltaic power generation cost C 光电 The details are as follows:

[0037]

[0038] Among them, P dynamic_cost_g is the dynamic investment cost of the photovoltaic field, T O&M_g is the operation time of the photovoltaic power plant, D deprectation_g is the depreciation of fixed assets of the photovoltaic power plant, P O&M_g is the operation and maintenance cost of the photovoltaic power plant, R tax_g is the income tax rate for the photovoltaic field, R discount is the discount rate, V restdualvaiue_g is the residual value of fixed assets of the photovoltaic power plant, E annual_g is the annual power generation of the photovoltaic field, Q 光电_发电 is the photovoltaic power generation.

[0039] A distributed power planning system, applied to the above method, comprises:

[0040] The voltage deviation judgment unit collects historical voltage data of the current area to determine whether there is a voltage quality problem. If the deviation is greater than the specified range, it means that there is a voltage quality problem. At this time, the number of deviations and duration are recorded and the collected data is transmitted to the target solution unit for solution. If there is no voltage quality problem, the historical voltage data of the next area is collected, and then it is further determined whether there is a voltage quality problem, and so on.

[0041] The target solving unit is used to construct a benefit function based on the voltage quality benefit, the benefit brought by the remaining electricity after smoothing the voltage deviation, and the power generation cost of the distributed power source. The target function is constructed and solved with the goal of maximizing the benefit to obtain the final distributed power source planning scheme, which includes whether to establish a distributed power source, what kind of distributed power source to establish, and how much power generation capacity to establish.

[0042] The manager terminal is used to receive the distributed power planning scheme output by the target solving unit as a reference for the final decision. The manager terminal is used to output the final decision, which includes whether to establish a distributed power source, what kind of distributed power source to establish, and how much power generation capacity to build.

[0043] A computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the distributed power supply planning method as described above.

[0044] A processor is used to run a program, wherein the program executes the distributed power supply planning method as described above when running.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] The present invention first collects historical voltage data of the current area to determine whether there is a voltage quality problem. If the deviation is greater than the specified range, the number of times the deviation occurs and the duration are recorded. Otherwise, the historical voltage data of the next area is collected and judged again. Then, in the area where the voltage quality problem occurs, the optimal solution is obtained by solving the objective function. The objective function comprehensively considers the voltage quality benefit, the benefit brought by the remaining electricity after the voltage deviation is smoothed, and the power generation cost of the distributed power supply. In other words, the present invention can construct and solve the objective function with the goal of maximizing benefits, and obtain the final distributed power supply planning solution, which includes whether to establish a distributed power supply, what kind of distributed power supply to establish, and how much power generation capacity to establish. It provides a data reference for managers to make the final decision. DETAILED DESCRIPTION

[0047] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0048] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0049] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0050] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0051] In one embodiment of the present invention, a distributed power planning method is provided, comprising the following steps:

[0052] Step 1: Collect historical voltage data for the current area to determine whether there is a voltage quality problem. If the deviation is greater than the specified range, it indicates a voltage quality problem. The number of deviations and their duration are recorded and step 2 is performed.

[0053] Specifically, the voltage deviation is calculated as follows:

[0054]

[0055] Where V 偏差 is the voltage deviation (100%), V 实际 is the actual voltage, V 额定 is the rated voltage.

[0056] According to the national standard "Permissible deviation of power supply voltage for power quality" GB / T 12325-2008:

[0057] The sum of the absolute values of positive and negative deviations of the power supply voltage of 35kV and above shall not exceed 10% of the nominal voltage.

[0058] The allowable deviation of three-phase power supply voltage of 10kV and below is ±7% of the rated voltage.

[0059] The allowable deviation of 220V single-phase power supply voltage is +7%, -10%.

[0060] If the voltage exceeds the above range (limited range), it means that there is a voltage quality problem.

[0061] Step 2: Determine whether to install distributed power generation in the current area by solving the objective function, and obtain the type and power generation of the installed distributed power generation.

[0062] With the goal of maximizing benefits, the objective function is constructed as follows:

[0063] max Z=C 电压质量 +C 电量冗余 -C 发电

[0064] Where Z is the benefit function, C 电压质量 is the voltage quality benefit, C 电量冗余 In order to smooth out the benefits of the remaining power after the voltage deviation, C 发电 is the power generation cost of distributed power generation.

[0065] In the above formula, the voltage quality benefit C is considered 电压质量 The economic loss that may be caused by the voltage deviation exceeding the range is measured, that is, the economic loss that can be avoided when the power deviation is restored to the normal range through the adjustment of distributed power supply. The benefit C after selling the remaining electricity after the voltage deviation is smoothed out 电量冗余 This is to take into account that after the distributed power generation starts generating electricity, there may still be power redundancy, that is, the total amount of power generated by the distributed power generation is greater than the power required to smooth out the voltage deviation beyond the range. At this time, there will be a certain amount of surplus power. Regardless of whether the surplus power is sold or used by the user, the surplus power has economic value. 发电 It is the cost required to build and operate distributed power sources.

[0066] Voltage quality benefit C 电压质量 The main measure of voltage quality benefits is the loss caused by voltage deviation exceeding the allowable range. In this embodiment, the cost of production interruption is taken into account. This is because the largest and most important economic loss caused by voltage deviation is the interruption of the production process, which in turn affects production efficiency and product quality. The voltage quality benefits are measured by the cost of production interruption as follows:

[0067] C 电压质量 =F 收入损失 +F 停机_运营成本 +F 恢复成本 +F 机会成本

[0068] Where, F 收入损失 is the revenue loss during downtime caused by voltage deviation, F 停机_运营成本 is the operating cost during downtime caused by voltage deviation, F 恢复成本 F is the cost of restoring the system to its original state after shutdown. 机会成本is the potential opportunity cost during downtime caused by voltage deviation. The above parameters are calculated using the following formula:

[0069] F 收入损失 = Average hourly revenue × downtime duration;

[0070] F 停机_运营成本 = (fixed cost + labor cost + utility cost) × downtime;

[0071] F 恢复成本 = Repair cost + Replacement cost + Overtime cost;

[0072] F 机会成本 = Potential revenue during downtime - Lost revenue.

[0073] The benefit of selling the remaining electricity after the voltage deviation is smoothed out is C 电量冗余 The current real-time electricity price is used for conversion. Regardless of whether this part of the electricity is sold to obtain explicit benefits or used for self-use to obtain implicit benefits, it is measured by the current real-time electricity price, as follows:

[0074] C 电量冗余 =R 电价 ×(Q 发电量 -Q V )

[0075] Where R 电价 is the real-time electricity price, Q 发电量 is the total power generation of distributed power generation, Q V The amount of electricity required to smooth out voltage deviations.

[0076] The power generation cost of distributed power generation C 发电 The cost of electricity and the amount of power generated are used to measure the power generation. In this embodiment, the IQ distributed power generation considered includes three cases: thermal power generation, wind power generation, and photovoltaic power generation. When solving the objective function, the power generation cost C of the distributed power generation is 发电 There are three possible values for thermal power generation cost, wind power generation cost and photovoltaic power generation cost, namely: C 发电 ∈[C 火电 , C 风电 , C 光电 ].

[0077] Thermal power generation cost C 火电 The details are as follows:

[0078]

[0079] Where C n represents the cost expenditure in the nth year, Q n represents the electricity generated in the nth year, r represents the internal rate of return, or the discount rate, Q火电_发电 is the output thermal power.

[0080] Wind power generation cost C 风电 The details are as follows:

[0081]

[0082] Among them, P dynamic_cost is the dynamic investment cost of the wind farm, T O&M is the operating time of the wind farm, D deprectation is the depreciation of fixed assets of wind farm, P O&M is the operation and maintenance cost of the wind farm, R tax is the income tax rate for wind farms, R discount is the discount rate, V restdualvaiue is the residual value of fixed assets of the wind farm, E annual is the annual power generation of the wind farm, Q 风电_发电 is the output wind power.

[0083] Photovoltaic power generation cost C 光电 The details are as follows:

[0084]

[0085] Among them, P dynamic_cost_g is the dynamic investment cost of the photovoltaic field, T O&M_g is the operation time of the photovoltaic power plant, D deprectation_g is the depreciation of fixed assets of the photovoltaic power plant, P O&M_g is the operation and maintenance cost of the photovoltaic power plant, R tax_g is the income tax rate for the photovoltaic field, R discount is the discount rate, V restdualvaiue_g is the residual value of fixed assets of the photovoltaic power plant, E annual_g is the annual power generation of the photovoltaic field, Q 光电_发电 is the photovoltaic power generation.

[0086] The decision output module of this embodiment uses the gradient ascent algorithm (Gradient Ascent). The gradient ascent method is an iterative method that gradually adjusts the parameters along the direction of the objective function gradient to find the maximum value of the function. The following are the specific steps of the gradient ascent method:

[0087] Step 1: Obtain the data set for decision making and randomly select an initial point as the starting point;

[0088] Step 2: Calculate the gradient of the objective function Z at the current point;

[0089] Step 3: Update the parameters along the direction of the gradient, which is defined as the learning rate and controls the step size;

[0090] Step 4: Check whether the magnitude of the gradient is less than a preset threshold, or check whether the value of the objective function changes very little in several consecutive iterations. If so, the algorithm is considered to have converged.

[0091] Step 5: If there is no convergence, return to step 2 and continue iterating;

[0092] Step 6: When the algorithm converges, output the value of the current decision.

[0093] In one embodiment of the present invention, a distributed power planning system is provided, comprising:

[0094] The voltage deviation judgment unit collects historical voltage data of the current area to determine whether there is a voltage quality problem. If the deviation is greater than the specified range, it means that there is a voltage quality problem. At this time, the number of deviations and duration are recorded and the collected data is transmitted to the target solution unit for solution. If there is no voltage quality problem, the historical voltage data of the next area is collected, and then it is further determined whether there is a voltage quality problem, and so on.

[0095] The target solving unit is used to construct a benefit function based on the voltage quality benefit, the benefit brought by the remaining electricity after smoothing the voltage deviation, and the power generation cost of the distributed power source. The target function is constructed and solved with the goal of maximizing the benefit to obtain the final distributed power source planning scheme, which includes whether to establish a distributed power source, what kind of distributed power source to establish, and how much power generation capacity to establish.

[0096] The manager terminal is used to receive the distributed power planning scheme output by the target solving unit as a reference for the final decision. The manager terminal is used to output the final decision, which includes whether to establish a distributed power source, what kind of distributed power source to establish, and how much power generation capacity to build.

[0097] In summary, the present invention first collects historical voltage data of the current area to determine whether there is a voltage quality problem. If the deviation is greater than the specified range, the number of occurrences and duration of the deviation are recorded. Otherwise, the historical voltage data of the next area is collected and judged again. Then, in the area where the voltage quality problem occurs, the optimal solution is obtained by solving the objective function. The objective function comprehensively considers the voltage quality benefit, the benefit brought by the remaining electricity after the voltage deviation is smoothed, and the power generation cost of the distributed power supply. In other words, the present invention can construct and solve the objective function with the goal of maximizing benefits, and obtain the final distributed power supply planning solution, which includes whether to establish a distributed power supply, what kind of distributed power supply to establish, and how much power generation capacity to build. It provides a data reference for managers to make the final decision.

[0098] Those skilled in the art will appreciate that the units of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition of each example has been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0099] In the embodiments provided by the present invention, it should be understood that the division of units is merely a logical function division, and there may be other division methods in actual implementation, for example, multiple units can be combined into one unit, one unit can be split into multiple units, or some features can be ignored, etc.

[0100] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0101] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-0nly Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc., various media that can store program code.

[0102] 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 it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A distributed power planning method, characterized in that: The following steps are involved: Collect historical voltage data for the current area to determine whether there are voltage quality problems. If the deviation is greater than the specified range, record the number of deviations and their duration. Otherwise, collect historical voltage data for the next area and make another judgment. With the goal of maximizing benefits, an objective function is constructed. By solving the objective function, the optimal solution is obtained. The optimal solution includes whether to establish distributed power generation. The objective function is as follows: max Z=C 电压质量 +C 电量冗余 -C 发电 Where Z is the benefit function, C 电压质量 is the voltage quality benefit, C 电量冗余 In order to smooth out the benefits of the remaining power after the voltage deviation, C 发电 is the power generation cost of distributed power generation.

2. A distributed power planning method according to claim 1, characterized in that: The steps to determine whether there is a voltage quality problem are as follows: First, calculate the voltage deviation. The voltage deviation is calculated as follows: Where V 偏差 is the voltage deviation, V 实际 is the actual voltage, V 额定 is the rated voltage; Then, the following standards are used to measure whether the voltage exceeds the allowable range. If the voltage exceeds the following range, it is considered a voltage quality problem: Positive and negative tolerance of power supply voltage of 35kV and above: 10% of nominal voltage; Permissible deviation of three-phase power supply voltage of 10kV and below: ±7% of rated voltage; The allowable deviation of 220V single-phase power supply voltage is: +7%, -10%.

3. A distributed power planning method according to claim 1, characterized in that: The voltage quality benefit is measured by the production interruption cost, C 电压质量 The calculation formula is as follows: C 电压质量 =F 收入损失 +F 停机_运营成本 +F 恢复成本 +F 机会成本 Where, F 收入损失 is the revenue loss during downtime caused by voltage deviation, F 停机_运营成本 is the operating cost during downtime caused by voltage deviation, F 恢复成本 F is the cost of restoring the system to its original state after shutdown. 机会成本 The potential opportunity cost during downtime caused by voltage deviation.

4. A distributed power planning method according to claim 3, characterized in that: C 电压质量 During the calculation process, each parameter is calculated by the following formula: F 收入损失 = Average hourly revenue × downtime duration; F 停机_运营成本 = (fixed cost + labor cost + utility cost) × downtime; F 恢复成本 = Repair cost + Replacement cost + Overtime cost; F 机会成本 = Potential revenue during downtime - Lost revenue.

5. A distributed power planning method according to claim 1, characterized in that: C 电量冗余 The calculation formula is as follows: C 电量冗余 =R 电价 ×(Q 发电量 -Q V ) Where R 电价 is the real-time electricity price, Q 发电量 is the total power generation of distributed generation, Q V The amount of electricity required to smooth out voltage deviations.

6. A distributed power planning method according to claim 1, characterized in that: The power generation cost of distributed power generation C 发电 There are two possible costs: thermal power generation cost and wind power generation cost. The thermal power generation cost C 火电 The details are as follows: Where C n represents the cost expenditure in the nth year, Q n represents the electricity generated in the nth year, r represents the internal rate of return, or the discount rate, Q 火电_发电 is the output thermal power; Wind power generation cost C 风电 The details are as follows: Among them, P dynamic_cost is the dynamic investment cost of the wind farm, T O&M is the operating time of the wind farm, D deprectation is the depreciation of fixed assets of wind farm, P O&M is the operation and maintenance cost of the wind farm, R tax is the income tax rate for wind farms, R discount is the discount rate, V restdualvaiue is the residual value of fixed assets of the wind farm, E annual is the annual power generation of the wind farm, Q 风电_发电 is the output wind power.

7. A distributed power planning method according to claim 3, characterized in that: The power generation cost of distributed power generation C 发电 There are three possible values for the cost of thermal power generation, wind power generation and photovoltaic power generation. The photovoltaic power generation cost C 光电 The details are as follows: Among them, P dynamic_cost_g is the dynamic investment cost of the photovoltaic field, T O&M_g is the operation time of the photovoltaic power plant, D deprectation_g is the depreciation of fixed assets of the photovoltaic power plant, P O&M_g is the operation and maintenance cost of the photovoltaic power plant, R tax_g is the income tax rate for the photovoltaic field, R discount is the discount rate, V restdualvaiue_g is the residual value of fixed assets of the photovoltaic power plant, E annual_g is the annual power generation of the photovoltaic field, Q 光电_发电 is the photovoltaic power generation.

8. A distributed power planning system, characterized in that: The method applied to any one of claims 1 to 7, comprising: The voltage deviation judgment unit collects historical voltage data for the current area to determine whether there is a voltage quality problem. If the deviation is greater than the specified range, it indicates a voltage quality problem. The number of deviations and their duration are recorded and the collected data is transmitted to the target solution unit for solution. If there is no voltage quality problem, the historical voltage data for the next area is collected to further determine whether there is a voltage quality problem there. The target solving unit is used to construct a benefit function based on the voltage quality benefit, the benefit of the remaining power after the voltage deviation is smoothed, and the power generation cost of the distributed power source. The target function is constructed and solved with the goal of maximizing the benefit to obtain the final distributed power source planning scheme. The distributed power source planning scheme includes whether to establish a distributed power source, what type of distributed power source to establish, and how much power generation capacity to establish; The manager terminal is used to receive the distributed power planning scheme output by the target solving unit as a reference for the final decision. The manager terminal is used to output the final decision, which includes whether to establish a distributed power source, what kind of distributed power source to establish, and how much power generation capacity to build.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the distributed power planning method according to any one of claims 1 to 7.

10. A processor, characterized in that: The processor is configured to run a program, wherein the program, when running, executes the distributed power planning method according to any one of claims 1 to 7.

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