A new energy plant voltage control method and system based on the principle of minimum loss

Abstract

The present invention discloses a voltage control method and system for a new energy plant based on the principle of minimum loss. The control method includes the following steps: obtaining the active power value of each inverter, and calculating the loss value of the inverter based on the active power value; setting the reactive power of each inverter to the rated reactive power according to the maximum value of the reactive coefficient, selecting an inverter in order from small to large loss values, and calculating the sum of the reactive powers that can be output by the selected inverters; when the sum of the reactive powers that can be output by the selected inverters is greater than the total reactive power demand of the new energy plant, the voltage of the new energy plant is controlled by adjusting the reactive power values ​​output by the selected inverters based on the principle of minimum loss. Through refined inverter management and reactive power control, the system loss is minimized, the operating efficiency and economy of the new energy plant are improved, and the stability and power quality of the power grid are ensured.

Description

Technical Field

[0001] The present invention relates to the field of power system control technology, and in particular to a new energy plant voltage control method and system based on the principle of minimum loss. Background Art

[0002] The output of wind turbines and photovoltaic generators is significantly affected by weather, resulting in significant random fluctuations in their power generation. This often leads to "wind and solar curtailment" on the generation side. Therefore, to prevent this phenomenon, it is necessary to research these generators to develop them into high-quality frequency regulation resources, alleviate the frequency regulation pressure on traditional hydropower plants, and accelerate the dynamic response performance of system frequency regulation.

[0003] In reality, both new energy systems and energy storage systems possess a certain level of reactive power support capability. In new energy power plants and substations, the reactive power of each device should be fully utilized to achieve comprehensive AC voltage regulation. Currently, voltage support in new energy power plants and substations primarily utilizes SVGs. However, SVGs have limited support capacity, especially during transient conditions, and can only support the voltage at the PCC point. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a voltage control method and system for a new energy plant based on the principle of minimum loss. Through refined inverter management and reactive power control, the system loss is minimized, the operating efficiency and economy of the new energy plant are improved, and the stability and power quality of the power grid are ensured.

[0005] To solve the above technical problems, a first aspect of an embodiment of the present invention provides a voltage control method for a new energy power plant based on the principle of minimum loss. The new energy power plant includes a plurality of inverters, each of which is connected to a node on an AC transmission line. The control method includes the following steps:

[0006] Obtaining an active power value of each of the inverters, and calculating a loss value of the inverter based on the active power value;

[0007] The reactive power of each inverter is set to the rated reactive power according to the maximum value of the reactive coefficient, the inverters are selected in order from the smallest to the largest loss value, and the sum of the reactive powers that can be output by the selected inverters is calculated;

[0008] When the sum of the reactive power output by the selected several inverters is greater than the total reactive power demand of the new energy plant, the voltage of the new energy plant is regulated by adjusting the reactive power values ​​output by the selected several inverters based on the principle of minimum loss.

[0009] Furthermore, the calculation formula for the sum of reactive powers that can be output by the selected plurality of inverters is:

[0010]

[0011] Where ΔQ k is the output reactive power of the kth selected inverter, K s is the number of inverters that have been selected.

[0012] Furthermore, the K s The proposed output reactive power of the selected inverter The calculation formula is:

[0013]

[0014] in, For K s The proposed output reactive power of the inverter, Q r is the total reactive power demand of the new energy plant, For K s The current reactive power of the inverter.

[0015] Furthermore, the calculation formula of the loss value of the inverter is:

[0016]

[0017] Among them, R ij is the resistance value of the i-th branch of the j-th inverter, X kj is the reactance value of the kth branch of the jth inverter, P j is the active power value of the jth inverter, P total is the total output active power of the new energy plant, n is the number of branch sections connecting the j-th inverter to the PCC point;

[0018] The total loss value Q of several inverters ALL The calculation formula is:

[0019]

[0020] Wherein, m is the total number of the inverters, δ j is the reactive power coefficient of the jth inverter.

[0021] Furthermore, the calculation formula for the maximum reactive coefficient is:

[0022]

[0023] Among them, Q Nj is the rated reactive power of the jth inverter, Pj is the active power value of the j-th inverter.

[0024] Furthermore, the inverter includes: a photovoltaic inverter, a wind turbine inverter, an energy storage inverter and / or an SVG inverter.

[0025] Accordingly, a second aspect of an embodiment of the present invention provides a new energy plant voltage control system based on the minimum loss principle. The new energy plant includes a plurality of inverters, each of which is connected to a node on an AC transmission line. The voltage of the new energy plant is controlled based on any of the above-mentioned new energy plant voltage control methods based on the minimum loss principle. The control system includes:

[0026] a loss calculation module, configured to obtain an active power value of each of the inverters and calculate a loss value of the inverter based on the active power value;

[0027] an inverter selection module, configured to set the reactive power of each inverter to the rated reactive power according to the maximum reactive coefficient, select the inverters in order of the loss values ​​from small to large, and calculate the sum of the reactive powers that can be output by the selected inverters;

[0028] A voltage control module is used to control the voltage of the new energy plant by adjusting the reactive power values ​​output by the selected several inverters based on the principle of minimum loss when the sum of the reactive power that can be output by the selected several inverters is greater than the total reactive power demand of the new energy plant.

[0029] Furthermore, the calculation formula for the sum of reactive powers that can be output by the selected plurality of inverters is:

[0030]

[0031] Where ΔQ k is the output reactive power of the kth selected inverter, K s The number of inverters selected;

[0032] No. K s The proposed output reactive power of the selected inverter The calculation formula is:

[0033]

[0034] in, For K s The proposed output reactive power of the inverter, Q r is the total reactive power demand of the new energy plant, For K sThe current reactive power of the inverter.

[0035] Accordingly, the third aspect of an embodiment of the present invention provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes any of the above-mentioned new energy plant voltage control methods based on the principle of minimum loss.

[0036] Accordingly, a fourth aspect of an embodiment of the present invention provides a computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement any of the above-mentioned new energy plant voltage control methods based on the principle of minimum loss.

[0037] The above technical solutions of the embodiments of the present invention have the following beneficial technical effects:

[0038] 1. By calculating the loss value of each inverter and selecting the inverter with the lowest loss value to participate in voltage regulation first, the energy efficiency of the inverter is optimized during operation, the heat loss of the inverter and the energy loss during the power conversion process are reduced, thereby improving the energy utilization efficiency of the entire new energy plant;

[0039] 2. By setting the reactive power of the inverter to its rated value and sorting and selecting according to the inverter loss value, accurate reactive power output and regulation are ensured. When the selected inverter combination can meet the total reactive power demand of the plant station, the system can make timely adjustments to avoid excess or insufficient reactive power, thereby ensuring voltage stability and power quality of the power grid;

[0040] 3. The control strategy based on the principle of minimum loss not only focuses on the operating efficiency of a single inverter, but also takes into account the losses of the entire system. By optimizing inverter selection and reactive power output, it reduces the overall system losses, lowers operating costs, and improves the economy and market competitiveness of new energy plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a flow chart of a voltage control method for a new energy plant based on the principle of minimum loss provided by an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the connection between a new energy plant and a power station provided by an embodiment of the present invention;

[0043] Figure 3 This is a block diagram of a module of a new energy plant voltage control system based on the principle of minimum loss provided by an embodiment of the present invention.

[0044] Reference numerals:

[0045] 1. Loss calculation module, 2. Inverter selection module, 3. Voltage control module. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0047] Please refer to Figure 1 and Figure 2 A first aspect of an embodiment of the present invention provides a voltage control method for a new energy power plant based on the principle of minimum loss. The new energy power plant includes a plurality of inverters, each of which is connected to a node on an AC transmission line. The control method includes the following steps:

[0048] Step S100: acquiring the active power value of each inverter, and calculating the loss value of the inverter based on the active power value.

[0049] In step S200 , the reactive power of each inverter is set to the rated reactive power according to the maximum reactive coefficient, an inverter is selected in order of loss value from small to large, and the sum of the reactive powers that can be output by the selected inverters is calculated.

[0050] Step S300: When the sum of the reactive power output by the selected inverters is greater than the total reactive power demand of the new energy plant, the voltage of the new energy plant is regulated by adjusting the reactive power values ​​output by the selected inverters based on the principle of minimum loss.

[0051] The above-mentioned new energy plant voltage control method accurately obtains the active power value of each inverter and calculates the corresponding loss, and then optimizes the reactive power output of the inverter according to the reactive coefficient and loss value, thereby minimizing system losses while meeting the reactive power requirements of the plant. By intelligently selecting inverters and regulating their reactive output, it not only improves the efficiency and accuracy of voltage control, but also reduces energy loss and optimizes the power quality of the new energy plant, thereby improving the economy and reliability of the entire system.

[0052] Specifically, the calculation formula for the sum of reactive powers that can be output by several selected inverters is:

[0053]

[0054] Where ΔQ k is the output reactive power of the kth selected inverter, K sThe number of inverters selected.

[0055] By calculating the sum of the reactive power outputs of the selected inverters and comparing this total reactive power with the total reactive power demand of the renewable energy plant, precise control of the inverter output is achieved. This ensures efficient and economical voltage regulation. By optimizing the inverter's reactive power output, energy losses are reduced, voltage stability is improved, and the power quality and overall operational efficiency of the renewable energy plant are enhanced. Furthermore, this approach helps extend the inverter's service life by avoiding unnecessary high-load operation.

[0056] Furthermore, the K s The proposed output reactive power of the selected inverter The calculation formula is:

[0057]

[0058] in, For K s The proposed output reactive power of each inverter, Q r is the total reactive power demand of the new energy plant, For K s The current reactive power of each inverter.

[0059] By accurately calculating the reactive power output of each selected inverter, the new energy plant can optimize reactive power distribution and output based on actual demand and the current state of the inverter. It can dynamically adjust the inverter's reactive power output to meet the plant's total reactive power demand, while also taking into account the inverter's actual capabilities and limitations, thereby improving the accuracy and response speed of voltage regulation. This approach can effectively reduce energy loss, improve power quality, and enhance grid stability and reliability, while also providing a more flexible and efficient operating environment for the inverter.

[0060] Furthermore, the calculation formula of the inverter loss value is:

[0061]

[0062] Among them, R ij is the resistance value of the i-th branch of the j-th inverter, X kj is the reactance value of the kth branch of the jth inverter, P j is the active power value of the jth inverter, P total is the total output active power of the new energy plant, and n is the number of branch sections connecting the j-th inverter to the PCC point.

[0063] By calculating inverter losses, the system takes into account the resistance and reactance of the inverter's internal branches, as well as the impact of active power, allowing for accurate assessment of each inverter's losses in different branch sections. This system also provides a refined loss management approach, enabling renewable energy plants to optimize reactive power distribution based on the actual inverter losses, achieving more effective voltage support and improving grid stability. Furthermore, it reduces inverter heat loss, improving its operating efficiency, and ultimately helping to reduce overall plant energy consumption and improve power quality.

[0064] The total loss value Q of several inverters ALL The calculation formula is:

[0065]

[0066] Where m is the total number of inverters, δ j is the reactive power coefficient of the jth inverter.

[0067] By calculating the total loss value of several inverters and taking the reactive power coefficient of the inverter into consideration, the loss of the entire system can be comprehensively evaluated. This allows the new energy plant to optimize the voltage control strategy based on the reactive power output capacity of the inverter, reducing the loss of the entire system. This improves the efficiency of voltage regulation, ensures the stability and power quality of the power grid, and at the same time reduces energy waste, improving the overall performance and economic benefits of the new energy plant.

[0068] Furthermore, the calculation formula for the maximum reactive power coefficient is:

[0069]

[0070] Among them, Q Nj is the rated reactive power of the jth inverter, P j is the active power value of the j-th inverter.

[0071] The rated reactive power of each inverter is determined by calculating the maximum reactive coefficient, taking into account the active power value of the inverter to ensure that the distribution of reactive power matches the actual operating capacity of the inverter. It can accurately control the reactive output of the inverter, optimize voltage support, and improve the stability and power quality of the power grid.

[0072] In the embodiment of the present invention, the inverter includes: a photovoltaic inverter, a wind turbine inverter, an energy storage inverter and / or an SVG inverter.

[0073] During voltage regulation, photovoltaic inverters can support grid voltage stability by adjusting their reactive power output. This is especially true when photovoltaic output fluctuates due to changes in sunlight. Dynamic reactive power control is used to maintain grid voltage stability. Wind turbine inverters, typically located within wind farms, not only convert electricity but also contribute to grid voltage support by adjusting their reactive power output. Especially when wind speed fluctuations cause wind power output to fluctuate, wind turbine inverters can quickly respond to grid demand and provide the necessary reactive power. During voltage regulation, energy storage inverters can quickly adjust their charge and discharge states based on grid conditions, providing necessary reactive power support and helping to smooth grid load fluctuations and maintain voltage stability. SVG inverters (reactive power compensators) precisely control the reactive power injected into the grid by rapidly adjusting the phase and amplitude of their output voltage. This provides immediate reactive power compensation during voltage fluctuations and enhances grid stability.

[0074] The above technical solution is fully described below with a specific embodiment:

[0075] Please refer to Figure 2 , the active power generated by a single inverter is P, and the reactive power required is Q. The inverter power needs to pass through n branches to be transmitted to the PCC point. Assume that the total capacity of the i-th branch is S i , the corresponding impedance is R i +jX i ; The loss caused by the inverter is:

[0076]

[0077] in, is the voltage value of the i-th branch.

[0078] The above formula can be simplified as:

[0079]

[0080] Among them, k is any branch in the i-segment branch, P ALL is the total output active power of the new energy plant, X k is the reactance value of the kth branch.

[0081] Total loss P of new energy plants L_ALL The calculation formula is:

[0082]

[0083] Among them, m is the number of inverters in the new energy plant, and j is the inverter serial number.

[0084] Further, we can get:

[0085]

[0086] Among them, P j is the active power of the j-th inverter, Q j is the reactive power that the j-th inverter needs to generate, R ij is the resistance value of the j-th inverter on the i-th branch, X kj is the reactance value of the j-th inverter on the k-th branch.

[0087] Set Q j =δ j P j , where δ j is the reactive power coefficient of the j-th inverter, we can get:

[0088]

[0089] Among them, Q Nj is the rated reactive power of the jth inverter, δ j is the ratio of the maximum reactive power to the active power of the j-th inverter.

[0090] From the above formula we can get:

[0091]

[0092] in, It is the network structure parameter of the new energy plant. As long as the inverter does not change, the value of the network structure parameter will not change.

[0093] In order to achieve the goal of minimum loss in the present invention, find a The unit with the lowest value is assigned its reactive coefficient δ j Set it according to the maximum value and accumulate the reactive power it can generate until the total reactive power meets the preset reactive power.

[0094] Based on the above, the voltage control process of one embodiment of the present invention is as follows:

[0095] 1. Combine the active power currently output by each inverter to calculate (the loss value of each inverter) And sort them in order from smallest to largest.

[0096] 2. The above minimum unit is set according to the maximum reactive power (rated reactive power of the first inverter) Q N1 , and calculate the reactive power that can be generated, that is, ΔQ1=Q N1 -Q1, Q1 is the current reactive power output of the smallest unit.

[0097] 3. If ΔQ1 ≥ Q r, then the minimum unit output reactive power is calculated according to Q r +Q1 is set, and the calculation ends. r is the total reactive power demand of the new energy plant. Otherwise, go to step 4.

[0098] 4. The second small unit mentioned above is set according to the maximum reactive power Q N2 , and calculate the reactive power that can be generated, that is, ΔQ2=Q N2 -Q2.

[0099] 5. If ΔQ1+ΔQ2≥Q r , then the second small unit outputs reactive power according to Q r -ΔQ1+Q2 is set, and the calculation ends. Otherwise, go to step 6.

[0100] 6. Repeat steps 4-5 until No. K s The small unit outputs reactive power according to The calculation is completed.

[0101] Accordingly, please refer to Figure 3 A second aspect of an embodiment of the present invention provides a voltage control system for a new energy power plant based on the principle of minimum loss. The new energy power plant includes a plurality of inverters, each inverter being connected to a node on an AC transmission line. The voltage of the new energy power plant is controlled based on any of the above-mentioned voltage control methods for a new energy power plant based on the principle of minimum loss. The control system includes:

[0102] a loss calculation module 1, configured to obtain an active power value of each inverter and calculate a loss value of the inverter based on the active power value;

[0103] Inverter selection module 2, which is used to set the reactive power of each inverter to the rated reactive power according to the maximum reactive coefficient, select an inverter in order of loss value from small to large, and calculate the sum of the reactive powers that can be output by the selected inverters;

[0104] The voltage control module 3 is used to control the voltage of the new energy plant by adjusting the reactive power values ​​output by the selected inverters based on the principle of minimum loss when the sum of the reactive power that can be output by the selected inverters is greater than the total reactive power demand of the new energy plant.

[0105] Specifically, the calculation formula for the sum of reactive powers that can be output by several selected inverters is:

[0106]

[0107] Where ΔQ k is the output reactive power of the kth selected inverter, Ks is the number of selected inverters;

[0108] No. K s The proposed output reactive power of the selected inverter The calculation formula is:

[0109]

[0110] in, For K s The proposed output reactive power of each inverter, Q r is the total reactive power demand of the new energy plant, For K s The current reactive power of each inverter.

[0111] Accordingly, the third aspect of an embodiment of the present invention provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes any of the above-mentioned new energy plant voltage control methods based on the principle of minimum loss.

[0112] Accordingly, a fourth aspect of an embodiment of the present invention provides a computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement any of the above-mentioned new energy plant voltage control methods based on the principle of minimum loss.

[0113] The embodiment of the present invention aims to protect a voltage control method and system for a new energy plant based on the principle of minimum loss. The new energy plant includes several inverters, each of which is connected to a node on the AC transmission line. The control method includes the following steps: obtaining the active power value of each inverter, and calculating the loss value of the inverter based on the active power value; setting the reactive power of each inverter to the rated reactive power according to the maximum value of the reactive coefficient, selecting an inverter in order of loss value from small to large, and calculating the sum of the reactive power that can be output by the selected inverters; when the sum of the reactive power that can be output by the selected inverters is greater than the total reactive power demand of the new energy plant, the voltage of the new energy plant is controlled based on the principle of minimum loss by adjusting the reactive power values ​​output by the selected inverters. The above technical solution has the following effects:

[0114] 1. By calculating the loss value of each inverter and selecting the inverter with the lowest loss value to participate in voltage regulation first, the energy efficiency of the inverter is optimized during operation, the heat loss of the inverter and the energy loss during the power conversion process are reduced, thereby improving the energy utilization efficiency of the entire new energy plant;

[0115] 2. By setting the reactive power of the inverter to its rated value and sorting and selecting according to the inverter loss value, accurate reactive power output and regulation are ensured. When the selected inverter combination can meet the total reactive power demand of the plant station, the system can make timely adjustments to avoid excess or insufficient reactive power, thereby ensuring voltage stability and power quality of the power grid;

[0116] 3. The control strategy based on the principle of minimum loss not only focuses on the operating efficiency of a single inverter, but also takes into account the losses of the entire system. By optimizing inverter selection and reactive power output, it reduces the overall system losses, lowers operating costs, and improves the economy and market competitiveness of new energy plants.

[0117] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0118] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes 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 steps in the process. 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.

[0119] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work 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 The function specified in one or more boxes.

[0120] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device 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.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A voltage control method for a new energy power station based on the principle of minimum loss, characterized in that: The new energy station includes a plurality of inverters, each of which is connected to a node on the AC transmission line. The control method includes the following steps: Obtaining an active power value of each of the inverters, and calculating a loss value of the inverter based on the active power value; The reactive power of each inverter is set to the rated reactive power according to the maximum value of the reactive coefficient, the inverters are selected in order from the smallest to the largest loss value, and the sum of the reactive powers that can be output by the selected inverters is calculated; When the sum of the reactive powers output by the selected plurality of inverters is greater than the total reactive power demand of the new energy plant, the voltage of the new energy plant is regulated by adjusting the reactive power values ​​output by the selected plurality of inverters based on the principle of minimum loss; The calculation formula of the inverter loss value is: ； in, is the resistance value of the i-th branch of the j-th inverter, is the reactance value of the kth branch of the jth inverter, is the active power value of the j-th inverter, is the total output active power of the new energy plant, n is the number of branch sections connecting the j-th inverter to the PCC point; The total loss value of several inverters The calculation formula is: ； Wherein, m is the total number of the inverters, is the reactive power coefficient of the jth inverter.

2. The voltage control method for a new energy power station based on the principle of minimum loss according to claim 1 is characterized in that: The calculation formula for the sum of reactive powers that can be output by the selected inverters is: ； in, is the output reactive power of the kth selected inverter, is the number of inverters that have been selected.

3. The voltage control method for a new energy power station based on the principle of minimum loss according to claim 2 is characterized in that: No. The proposed output reactive power of the selected inverter The calculation formula is: ； in, For the The proposed output reactive power of the inverter, is the total reactive power demand of the new energy plant, For the The current reactive power of the inverter.

4. The voltage control method for a new energy power station based on the principle of minimum loss according to claim 1 is characterized in that: The calculation formula for the maximum reactive coefficient is: ； in, is the rated reactive power of the j-th inverter, is the active power value of the j-th inverter.

5. The voltage control method for a new energy plant based on the principle of minimum loss according to any one of claims 1 to 4, characterized in that: The inverter includes: a photovoltaic inverter, a wind turbine inverter, an energy storage inverter and / or an SVG inverter.

6. A new energy plant voltage control system based on the principle of minimum loss, characterized in that: A new energy station includes a plurality of inverters, each of which is connected to a node on an AC transmission line. The voltage of the new energy station is regulated based on the new energy station voltage regulation method based on the minimum loss principle as described in any one of claims 1 to 5. The regulation system includes: a loss calculation module, configured to obtain an active power value of each of the inverters and calculate a loss value of the inverter based on the active power value; an inverter selection module, configured to set the reactive power of each inverter to the rated reactive power according to the maximum reactive coefficient, select the inverters in order of the loss values ​​from small to large, and calculate the sum of the reactive powers that can be output by the selected inverters; A voltage control module is used to control the voltage of the new energy plant by adjusting the reactive power values ​​output by the selected several inverters based on the principle of minimum loss when the sum of the reactive power that can be output by the selected several inverters is greater than the total reactive power demand of the new energy plant.

7. The new energy plant voltage control system based on the minimum loss principle according to claim 6 is characterized in that: The calculation formula for the sum of reactive powers that can be output by the selected inverters is: ； in, is the output reactive power of the kth selected inverter, The number of inverters selected; No. The proposed output reactive power of the selected inverter The calculation formula is: ； in, For the The proposed output reactive power of the inverter, is the total reactive power demand of the new energy plant, For the The current reactive power of the inverter.

8. An electronic device, characterized in that: include: at least one processor; And a memory connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the new energy plant voltage control method based on the minimum loss principle as described in any one of claims 1-5.

9. A computer-readable storage medium, characterized in that Computer instructions are stored thereon, which, when executed by a processor, implement the voltage control method for a new energy plant based on the principle of minimum loss as described in any one of claims 1-5.

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