Treatment method and device based on voltage sag, electronic equipment and storage medium

Abstract

The invention discloses a voltage sag-based treatment method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining x voltage sag sensitive equipment in a target electric power park, determining x minimum compensation voltages corresponding to the x voltage sag sensitive equipment, the method comprises the following steps: grouping x voltage sag sensitive devices based on x minimum compensation voltages through a sensitive device grouping module to obtain n voltage sag sensitive device groups, determining n voltage amplitudes corresponding to the n voltage sag sensitive device groups through a transformer module, and determining a voltage amplitude greater than a voltage sag amplitude threshold in the n voltage amplitudes, m voltage amplitudes are obtained, m voltage sag sensitive equipment groups corresponding to the m voltage amplitudes are determined, and finally power supply operation is performed on voltage sag sensitive equipment in the m voltage sag sensitive equipment groups through the energy storage system module. By adopting the embodiment of the invention, the utilization rate of the energy storage capacity is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of voltage sag control, and in particular to a voltage sag control method, device, electronic equipment and storage medium. Background Art

[0002] Voltage sag control measures are usually implemented on the grid side, user side or other locations. Configuration of control equipment is a common means. At the same time, the configuration of equipment is usually aimed at economic benefits or the best control effect. At present, control devices are used to solve power quality problems and reduce economic losses caused by voltage sags. However, when the control effect is good, the control cost will be high. When the control cost is reduced, the control effect is not good enough. Therefore, how to improve the utilization rate of energy storage capacity is an urgent problem to be solved. Summary of the invention

[0003] The embodiments of the present application provide a voltage sag management method, device, electronic device and storage medium, which improve the utilization rate of energy storage capacity by sharing the management device.

[0004] In a first aspect, an embodiment of the present application provides a voltage sag control method, which is applied to a shared control device in a target power park. The shared control device includes a sensitive device grouping module, a transformer module, and an energy storage system module. The method includes:

[0005] Obtain x voltage sag sensitive devices in the target power park; x is an integer greater than 1;

[0006] Determine a minimum compensation voltage corresponding to each voltage sag sensitive device among the x voltage sag sensitive devices to obtain x minimum compensation voltages;

[0007] The x voltage sag sensitive devices are grouped based on the x minimum compensation voltages by a sensitive device grouping module to obtain n voltage sag sensitive device groups; n is an integer greater than 1 and less than x;

[0008] Determine the voltage amplitude corresponding to each voltage sag sensitive device group in the n voltage sag sensitive device groups through the transformer module to obtain n voltage amplitudes;

[0009] Determine the voltage sag amplitude threshold corresponding to the target power park;

[0010] Determine a voltage amplitude greater than a voltage sag amplitude threshold value among the n voltage amplitudes, and obtain m voltage amplitudes; m is an integer less than or equal to n;

[0011] Determine m voltage sag sensitive device groups corresponding to m voltage amplitudes;

[0012] The voltage sag sensitive devices in the m voltage sag sensitive device groups are powered by the energy storage system module.

[0013] In a second aspect, an embodiment of the present application provides a voltage sag-based governance device, which is applied to a shared governance device in a target power park, and the shared governance device includes a sensitive device grouping module, a transformer module, and an energy storage system module, and the device includes: an acquisition unit and a processing unit;

[0014] An acquisition unit, used to acquire x voltage sag sensitive devices in a target power park; x is an integer greater than 1;

[0015] A processing unit, used to determine a minimum compensation voltage corresponding to each voltage sag sensitive device among the x voltage sag sensitive devices, and obtain x minimum compensation voltages;

[0016] The x voltage sag sensitive devices are grouped based on the x minimum compensation voltages by a sensitive device grouping module to obtain n voltage sag sensitive device groups; n is an integer greater than 1 and less than x;

[0017] Determine the voltage amplitude corresponding to each voltage sag sensitive device group in the n voltage sag sensitive device groups through the transformer module to obtain n voltage amplitudes;

[0018] Determine the voltage sag amplitude threshold corresponding to the target power park;

[0019] Determine a voltage amplitude greater than a voltage sag amplitude threshold value among the n voltage amplitudes, and obtain m voltage amplitudes; m is an integer less than or equal to n;

[0020] Determine m voltage sag sensitive device groups corresponding to m voltage amplitudes;

[0021] The voltage sag sensitive devices in the m voltage sag sensitive device groups are powered by the energy storage system module.

[0022] In a third aspect, an embodiment of the present invention provides an electronic device, comprising: a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor so that the electronic device executes the method of the first aspect.

[0023] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement the method of the first aspect.

[0024] In a fifth aspect, an embodiment of the present invention provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, so that a computer executes the method of the first aspect.

[0025] The implementation of the present invention has the following beneficial effects:

[0026] It can be seen that the voltage sag control method described in the embodiment of the present invention is applied to a shared control device in a target power park. The shared control device includes a sensitive device grouping module, a transformer module, and an energy storage system module. First, x voltage sag sensitive devices in the target power park are obtained, and then the minimum compensation voltage corresponding to each of the x voltage sag sensitive devices is determined to obtain x minimum compensation voltages. The x voltage sag sensitive devices are grouped based on the x minimum compensation voltages by the sensitive device grouping module to obtain n voltage sag sensitive device groups. The voltage amplitude corresponding to each of the n voltage sag sensitive device groups is determined by the transformer module to obtain n voltage amplitudes. Then, the voltage sag amplitude threshold corresponding to the target power park is determined, and the voltage amplitude greater than the voltage sag amplitude threshold among the n voltage amplitudes is determined to obtain m voltage amplitudes. M voltage sag sensitive device groups corresponding to the m voltage amplitudes are determined. Finally, the voltage sag sensitive devices in the m voltage sag sensitive device groups are powered on by the energy storage system module, thereby improving the utilization rate of the energy storage capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the implementation methods of the present application or the background technology, the drawings required for use in the implementation methods of the present application or the background technology will be described below.

[0028] Figure 1 It is a structural diagram of a shared governance device provided in an embodiment of the present application;

[0029] Figure 2 It is a flow chart of a method for controlling voltage sag provided in an embodiment of the present application;

[0030] Figure 3 It is a structural schematic diagram of a voltage sag control device provided in an embodiment of the present application;

[0031] Figure 4 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the implementation mode of the present application. Obviously, the described implementation mode is only a part of the implementation mode of the present application, not all the implementation modes. Based on the implementation mode in the present application, all other implementation modes obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0033] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0034] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] See also Figure 1 , Figure 1 It is a structural diagram of a shared governance device provided in an embodiment of the present application. The shared governance device 10 includes a sensitive device grouping module 101, a transformer module 102, an energy storage system module 103, and a fast-cut switch module 104. The sensitive device grouping module 101 can group sensitive devices according to their minimum compensation voltages. The transformer module 102 can provide different power supply voltages to meet the needs of sensitive devices. The energy storage system module 103 can be a lead-carbon battery or other energy storage medium. Its power supply should have a fast response characteristic. Many mature products can achieve fast response within 10 milliseconds. It is an important component of the voltage sag governance device. The sensitive device is connected to the energy storage system module 103 through the fast-cut switch in the fast-cut switch module 104 to ensure that when a voltage sag occurs, the power supply can supply power to the sensitive device within 10ms.

[0036] In this embodiment, firstly, x voltage sag sensitive devices in the target power park are acquired, and then the minimum compensation voltage corresponding to each of the x voltage sag sensitive devices is determined to obtain x minimum compensation voltages, and then the x voltage sag sensitive devices are grouped based on the x minimum compensation voltages by the sensitive device grouping module 101 to obtain n voltage sag sensitive device groups, and then the voltage amplitude corresponding to each of the n voltage sag sensitive device groups is determined by the transformer module 102 to obtain n voltage amplitudes, and then the voltage sag amplitude threshold corresponding to the target power park is determined, and the voltage amplitude greater than the voltage sag amplitude threshold among the n voltage amplitudes is determined to obtain m voltage sag sensitive device groups. amplitude, then determine m voltage sag sensitive device groups corresponding to the m voltage amplitudes, finally power the voltage sag sensitive devices in the m voltage sag sensitive device groups through the energy storage system module 103, and turn on the fast-cut switches corresponding to the k voltage sag sensitive devices through the fast-cut switch module 104, so that the energy storage system module powers the k voltage sag sensitive devices based on the k priorities, and disconnect the fast-cut switches corresponding to the voltage sag sensitive devices other than the k voltage sag sensitive devices among the x voltage sag sensitive devices through the fast-cut switch module 104, so that the energy storage system module stops powering the voltage sag sensitive devices other than the k voltage sag sensitive devices among the x voltage sag sensitive devices.

[0037] See also Figure 2 , Figure 2 This is a flow chart of a voltage sag control method provided by an embodiment of the present application, including but not limited to the following steps:

[0038] S201: Acquire x voltage sag sensitive devices in the target power park.

[0039] In this embodiment, x is an integer greater than 1. The target power park contains many electrical equipment, and different equipment has different tolerance to voltage sag. Some equipment may have operation failure, production interruption or product quality degradation when the voltage drops slightly. These are voltage sag sensitive equipment, so first determine the x voltage sag sensitive equipment in the target power park.

[0040] S202: Determine a minimum compensation voltage corresponding to each voltage sag sensitive device among the x voltage sag sensitive devices to obtain x minimum compensation voltages.

[0041] In this embodiment, when a voltage sag occurs, in order for these sensitive devices to continue to work normally, a certain compensation voltage needs to be provided by the management device to compensate for the sag. Due to its own electrical characteristics, working requirements and other factors, each device requires a different minimum compensation voltage. After determining x voltage sag sensitive devices, the next step is to determine the minimum compensation voltage value required for each device to operate normally. If the minimum compensation voltage of each device is not known, over-compensation or under-compensation may occur during voltage sag management. Over-compensation may cause the device to withstand excessive voltage, which will not only waste energy, but may also cause damage to the device. The resources of the management device are limited. By determining the minimum compensation voltage of each device, the management resources can be reasonably allocated according to the importance and compensation requirements of the device.

[0042] S203: grouping the x voltage sag sensitive devices based on the x minimum compensation voltages through a sensitive device grouping module to obtain n voltage sag sensitive device groups.

[0043] In this embodiment, n is an integer greater than 1 and less than x. Exemplarily, the maximum and minimum values ​​of the x minimum compensation voltages are determined by the sensitive device grouping module. Specifically, the maximum and minimum values ​​of the x minimum compensation voltages define the range of all minimum compensation voltages, providing boundary conditions for determining the grouping interval. Exemplarily, the compensation voltage difference is determined based on the maximum and minimum values, and n interval ranges corresponding to the compensation voltage difference are determined based on the maximum and minimum values, wherein one interval range corresponds to one voltage sag sensitive device group. Specifically, the interval division method can be determined according to the actual situation and the requirements for the degree of refinement of the grouping. It can be an equidistant division or a non-equidistant division based on factors such as the importance of the device. Determining the interval range is the core step of the grouping, which enables devices with similar minimum compensation voltages to be divided into the same group, facilitating the subsequent adoption of a relatively unified governance strategy for the devices in the same group. Exemplarily, x minimum compensation voltages fall into n intervals, and the voltage sag sensitive device corresponding to the minimum compensation voltage in each of the n intervals is determined to obtain n voltage sag sensitive device groups. Specifically, the x minimum compensation voltages determined previously are compared with the n divided intervals to see which interval each minimum compensation voltage belongs to, and then the corresponding voltage sag sensitive device is found according to the interval range in which the minimum compensation voltage falls, thereby forming n voltage sag sensitive device groups.

[0044] It can be seen that through this grouping method, devices with similar minimum compensation voltages are divided into the same group, so that subsequent control measures can be implemented more targeted. When controlling voltage sag problems, it is possible to avoid separate and complex processing of each device, thereby improving the efficiency of control. This grouping method also helps to control control costs. If grouping is not performed, in order to meet the compensation needs of all devices under various voltage sag conditions, high-capacity, high-performance general control equipment may be required, which will lead to a significant increase in costs. Through grouping, control equipment with appropriate capacity and performance can be selected according to the equipment needs of different groups, thus avoiding over-configuration.

[0045] S204: Determine the voltage amplitude corresponding to each voltage sag sensitive device group in the n voltage sag sensitive device groups through the transformer module to obtain n voltage amplitudes.

[0046] In this embodiment, after completing the equipment grouping, the transformer module is used to determine the voltage amplitude corresponding to each voltage sag sensitive equipment group. The voltage amplitude is the actual voltage received by each group of equipment under normal operating conditions. The transformer module is usually used to change the voltage size, phase, etc. in the power system. In this embodiment, the transformer module plays a role in monitoring and determining the voltage conditions of each group of equipment, so that subsequent comparison and analysis can be performed based on these voltage amplitudes and set thresholds.

[0047] S205: Determine a voltage sag amplitude threshold corresponding to the target power park.

[0048] In this embodiment, the voltage sag amplitude threshold is determined based on multiple factors such as the overall tolerance of the equipment in the target power park, production requirements, economic costs, etc. When the actual voltage sag amplitude exceeds this threshold, it is considered that it may have a more serious impact on the equipment in the park, and corresponding control measures need to be taken to ensure the normal operation of the equipment and reduce economic losses.

[0049] S206: Determine a voltage amplitude greater than a voltage sag amplitude threshold value among the n voltage amplitudes, and obtain m voltage amplitudes.

[0050] In this embodiment, m is an integer less than or equal to n. The n voltage amplitudes previously determined by the transformer module are compared with the voltage sag amplitude threshold value set for the target power park, and those voltage amplitudes greater than the threshold value are found. The equipment groups corresponding to these voltage amplitudes are the equipment groups that may be greatly affected under the current voltage conditions, so the voltage amplitudes greater than the voltage sag amplitude threshold value among the n voltage amplitudes are determined to obtain m voltage amplitudes.

[0051] S207: Determine m voltage sag sensitive device groups corresponding to the m voltage amplitudes.

[0052] In this embodiment, based on the m voltage amplitudes greater than the voltage sag amplitude threshold screened out previously, their corresponding voltage sag sensitive device groups are found. These voltage sag sensitive device groups are the objects that need to be paid special attention to and take power supply and other governance measures in the current voltage sag situation, because the voltage they receive has approached or exceeded the threshold that may have a serious impact on the equipment.

[0053] S208: Powering the voltage sag sensitive devices in the m voltage sag sensitive device groups through the energy storage system module.

[0054] In this embodiment, illustratively, the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device groups is determined to obtain p economic loss values, wherein each voltage sag sensitive device corresponds to an economic loss value, and p is an integer greater than or equal to m. Specifically, for each device in the previously determined m voltage sag sensitive device groups, it is necessary to evaluate the economic loss that may be caused by it in the case of voltage sag. Exemplarily, firstly, historical voltage sag data of x voltage sag sensitive devices in a preset historical time period are obtained, and based on the historical voltage sag data, the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device groups is determined to obtain p economic loss values. Firstly, it is necessary to collect voltage sag related data about the x voltage sag sensitive devices in the preset historical time period. The voltage sag related data includes information such as the occurrence time, duration, sag amplitude, and operation status of the device during the voltage sag. Exemplarily, the downtime and downtime frequency of the first voltage sag sensitive device within a preset historical time period are determined, wherein the first voltage sag sensitive device is any voltage sag sensitive device in the group of m voltage sag sensitive devices, and then the economic loss value caused by the first voltage sag sensitive device during the downtime is determined to obtain a reference economic loss value. For example, assuming that the first voltage sag sensitive device can produce products worth 1,000 yuan per hour during normal operation, if the downtime is 58 minutes (about 0.97 hours), the reference economic loss value is about 0.97×1000=970 yuan. Exemplarily, determining the target adjustment parameter corresponding to the downtime frequency can be a mapping relationship between a preset downtime frequency and an adjustment parameter, and the target adjustment parameter corresponding to the downtime frequency can be determined based on the mapping relationship. Exemplarily, the reference economic loss value is adjusted according to the target adjustment parameter to obtain the economic loss value corresponding to the first voltage sag sensitive device. The specific calculation formula is as follows: the economic loss value corresponding to the first voltage sag sensitive device = reference economic loss value × (1 + target adjustment parameter); the economic loss value corresponding to the first voltage sag sensitive device can be obtained according to the above formula. According to the above method of determining the economic loss value corresponding to the first voltage sag sensitive device, the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device group can be determined to obtain p economic loss values, which will not be repeated here.

[0055] It can be seen that the economic loss value is determined for each voltage sag-sensitive device, which realizes the personalized measurement of the economic impact of different devices. The calculated economic loss value provides a strong basis for the reasonable allocation of resources (such as the electric energy of the energy storage system, the protection capacity of the management device, etc.) when facing voltage sag. According to the size of the economic loss value corresponding to the equipment, limited resources can be allocated preferentially to those equipment that may suffer greater economic losses during voltage sag, ensuring that these key equipment can be better protected under power fluctuations.

[0056] Exemplarily, k economic loss values ​​greater than an economic loss threshold are determined among p economic loss values, where k is an integer. Specifically, after obtaining the p economic loss values ​​corresponding to the m voltage sag sensitive device groups, it is necessary to set an economic loss threshold. This threshold is determined based on actual conditions. For example, factors such as the enterprise's cost tolerance, the importance of the equipment, and the average loss level of the industry can be considered. Then, the p economic loss values ​​are compared with this threshold to find out those economic loss values ​​greater than the threshold, and obtain k economic loss values.

[0057] Exemplarily, k voltage sag sensitive devices corresponding to k economic loss values ​​are determined, and the priority level corresponding to each of the k voltage sag sensitive devices is determined based on the k economic loss values, to obtain k priorities, wherein the greater the economic loss value corresponding to the voltage sag sensitive device, the higher the priority level corresponding to the voltage sag sensitive device. Specifically, since each economic loss value corresponds to a specific voltage sag sensitive device, after finding k economic loss values ​​greater than the economic loss threshold, the k voltage sag sensitive devices corresponding to these economic loss values ​​can be determined. The k voltage sag sensitive devices are devices that suffer relatively serious economic losses in the event of a voltage sag. Their priorities are determined based on the economic loss values ​​corresponding to these k voltage sag sensitive devices. The greater the economic loss value of the device, the higher its priority level. The purpose of this is to give priority to ensuring the power supply of those devices that suffer the most serious economic losses in the event of a voltage sag when the management capacity is limited, so as to minimize the overall economic losses.

[0058] It can be seen that by setting an economic loss threshold and finding k economic loss values ​​greater than the threshold and their corresponding k voltage sag-sensitive devices, the key equipment with more serious economic losses in the case of voltage sag can be accurately screened out. Resources are no longer evenly distributed to all equipment that may be affected by voltage sags, but are allocated in a targeted manner according to the severity of the economic losses. This enables governance resources to be used more efficiently, and each resource can be more effectively used to reduce the failure risk of equipment that is most likely to cause major economic losses during voltage sags, thereby improving the efficiency of the entire governance measure in resource utilization.

[0059] Exemplarily, k voltage sag sensitive devices are powered based on k priorities through the energy storage system module. Specifically, the energy storage system module is used to power the k voltage sag sensitive devices according to the k priorities determined previously. Devices with high priorities are powered first. When the power supply capacity of the energy storage system permits, power supply for devices with lower priorities is considered. In this way, when a voltage sag occurs, the electric energy of the energy storage system can be reasonably allocated, and priority is given to ensuring that those devices that have a greater impact on economic losses can operate normally, thereby effectively reducing the economic losses caused by voltage sag.

[0060] It needs to be explained that the sharing management device also includes a fast-cut switch module, which includes multiple fast-cut switches, each fast-cut switch corresponds to a voltage sag sensitive device, and the fast-cut switch module can be used to connect the fast-cut switches corresponding to k voltage sag sensitive devices, so that the energy storage system module supplies power to the k voltage sag sensitive devices based on k priorities, and the fast-cut switches corresponding to the voltage sag sensitive devices other than k voltage sag sensitive devices among the x voltage sag sensitive devices are disconnected through the fast-cut switch module, so that the energy storage system module stops supplying power to the voltage sag sensitive devices other than k voltage sag sensitive devices among the x voltage sag sensitive devices.

[0061] It can be seen that the fast-cut switch module can ensure that the energy storage system module gives priority to supplying power to k voltage sag-sensitive devices with larger economic loss values ​​according to k priorities. This method can reasonably distribute the power of the energy storage system and avoid indiscriminate power supply to all x voltage sag-sensitive devices. In the case of limited resources, limited power can be concentratedly supplied to the devices that need protection the most. This helps to improve the utilization efficiency of the energy storage system and ensure that economic losses can be minimized during voltage sags.

[0062] It should be noted that after the energy storage system module performs power supply operation on the voltage sag sensitive devices in the m voltage sag sensitive device groups, it is also necessary to determine the net income of the target power park in the tth year. Specifically, first determine the first economic loss value caused by the target power park in the tth year, where t is a positive integer, and the first economic loss value is the economic loss value caused by the target power park in the tth year after using the shared governance device. Then, obtain the second economic loss value caused by the target power park in the tth year when the shared governance device is not used. The net income of the target power park in the tth year is determined based on the first economic loss value and the second economic loss value, and is calculated specifically according to the following formula:

[0063]

[0064] Among them, NPV 2 is the net income of the target power park in the tth year, T is the project planning period, Closs,b (t) is the second loss difference, C loss,a (t) is the first loss difference, M(t) is the service fee to be paid in year t, and r is the discount rate.

[0065] The net income of the target power park in the tth year is a measure of the actual economic benefits of the target power park after the adoption of the shared governance device. It comprehensively considers factors such as the changes in economic losses before and after the use of the governance device and the relevant fees that need to be paid during the use process. If this value is positive, it means that the target power park has benefited economically after using the shared governance device. If it is negative, it means that although governance measures have been taken, the overall economic situation has not improved compared to when the device was not used, perhaps due to factors such as service fees.

[0066] It should be noted that the net income obtained by the investment company in the tth year also needs to be determined. First, the annual investment cost corresponding to the shared governance device is determined, and then the initial investment cost of the shared governance device is determined based on the annual investment cost. The specific calculation is based on the following formula:

[0067] C inv =T·C year +C remo +C lab

[0068] Among them, C inv is the initial investment cost, C year is the annual investment cost, C remo is the initial transformation cost of investment, C lab is the initial labor cost.

[0069] Then, the net income of the investment company in year t is determined based on the initial investment cost, which is calculated according to the following formula:

[0070]

[0071] Among them, NPV 1 is the net income of the investment company in year t, C op (1) is the maintenance cost of the shared governance device in the first year, and f is the cost growth rate.

[0072] It should be explained that, in this embodiment, there may be a conflict between the net income of the target power park in the tth year and the net income obtained by the investment company in the tth year, so a non-inferior optimal solution can be searched based on a particle optimization algorithm. Each particle in the particle swarm optimization algorithm represents a set of solutions of the objective function corresponding to the net income of the target power park in the tth year and the net income obtained by the investment company in the tth year. The single optimal solution of each particle is called a local optimal solution, and the optimal solution of all particles is called a global optimal solution. First, the power supply voltage of the shared governance device, the power, capacity and governance cost of the governance device are used as the initial values ​​of the particles, and iterative calculation is started. During the iteration process, the particles continuously optimize the flight speed and position, and this process is repeated until the termination condition of the algorithm is met. The particle swarm optimization algorithm selected by the optimal solution evaluation searches for a non-inferior optimal solution set so that it falls into the non-inferior optimal solution set. The global optimal solution and local optimal solution of each particle are calculated in each objective function. When updating the particle speed, the global optimal solution of all particles is averaged as the global optimal solution. According to the degree of dispersion of the local optimal solution relative to the global optimal solution, a suitable local optimal solution is selected. Specifically, historical voltage sag data, user losses, sensitive equipment parameters and topological structure are input into the particle swarm optimization algorithm, and then the power supply voltage amplitude, governance device capacity and user annual service fee are initialized. Then the individual extreme value and the global extreme value are calculated, and then the particle speed and position are updated, and the single extreme value and the global extreme value of each particle are solved. The average value of the global extreme value of each particle is taken as the global optimal solution. If the discreteness of the single extreme value of each particle is greater than the critical value, the single extreme value of each particle is taken as the local optimal solution. If the discreteness of the single extreme value of each particle is less than the critical value, a global extreme value is selected from the global extreme values ​​of each particle as the local optimal solution. If both the local optimal solution and the global optimal solution meet the termination conditions, the power supply voltage amplitude, the governance device capacity, the user's annual service fee and the sensitive equipment grouping are output.

[0073] It can be seen that by determining the net income of the target power park in the tth year, the actual economic effect of the shared governance device after its application in the park can be intuitively evaluated. This net income comprehensively considers the difference in economic losses before and after the use of the governance device, service fees and other factors. If the net income is positive, it means that the shared governance device effectively reduces the economic losses caused by voltage sag, and the benefits it brings exceed the cost of using the device. The target power park has gained economic benefits from the governance measures. Understanding the net income of the target power park in the tth year will help the target power park to reasonably allocate resources. The target power park can analyze the governance effects of different equipment groups (such as equipment grouped according to the sensitivity to voltage sag) based on the net income. For those equipment groups whose net income is significantly improved after governance, resource input can be appropriately increased (such as giving priority to power supply), while for equipment groups whose net income is not significantly improved, the governance strategy can be re-evaluated. Determining the net income achieved by the investment company in the tth year is a key indicator to measure the success of its investment in the shared governance device project. A positive net income means that the investment company has obtained an economic return from the project in that year, indicating that the project is economically feasible. If the net income achieved by the investment company in the tth year continues to grow, the investment company can increase its investment in this area. On the contrary, if the net income is not good, the reasons can be analyzed, such as excessive costs, insufficient market demand, etc., to decide whether to adjust the investment strategy, such as reducing costs, improving technology to improve governance effects and increase profits.

[0074] In summary, the implementation of the present invention has the following beneficial effects:

[0075] It can be seen that the voltage sag control method described in the embodiment of the present invention is applied to a shared control device in a target power park. The shared control device includes a sensitive device grouping module, a transformer module, and an energy storage system module. First, x voltage sag sensitive devices in the target power park are obtained, and then the minimum compensation voltage corresponding to each of the x voltage sag sensitive devices is determined to obtain x minimum compensation voltages. The x voltage sag sensitive devices are grouped based on the x minimum compensation voltages by the sensitive device grouping module to obtain n voltage sag sensitive device groups. The voltage amplitude corresponding to each of the n voltage sag sensitive device groups is determined by the transformer module to obtain n voltage amplitudes. Then, the voltage sag amplitude threshold corresponding to the target power park is determined, and the voltage amplitude greater than the voltage sag amplitude threshold among the n voltage amplitudes is determined to obtain m voltage amplitudes. M voltage sag sensitive device groups corresponding to the m voltage amplitudes are determined. Finally, the voltage sag sensitive devices in the m voltage sag sensitive device groups are powered on by the energy storage system module, thereby improving the utilization rate of the energy storage capacity.

[0076] See also Figure 3 , Figure 3It is a structural schematic diagram of a voltage sag control device provided in an embodiment of the present application. The voltage sag control device 300 includes: an acquisition unit 301 and a processing unit 302;

[0077] The acquisition unit 301 is used to acquire x voltage sag sensitive devices in the target power park; x is an integer greater than 1;

[0078] The processing unit 302 is used to determine the minimum compensation voltage corresponding to each voltage sag sensitive device among the x voltage sag sensitive devices, and obtain x minimum compensation voltages;

[0079] The x voltage sag sensitive devices are grouped based on the x minimum compensation voltages by a sensitive device grouping module to obtain n voltage sag sensitive device groups; n is an integer greater than 1 and less than x;

[0080] Determine the voltage amplitude corresponding to each voltage sag sensitive device group in the n voltage sag sensitive device groups through the transformer module to obtain n voltage amplitudes;

[0081] Determine the voltage sag amplitude threshold corresponding to the target power park;

[0082] Determine a voltage amplitude greater than a voltage sag amplitude threshold value among the n voltage amplitudes, and obtain m voltage amplitudes; m is an integer less than or equal to n;

[0083] Determine m voltage sag sensitive device groups corresponding to m voltage amplitudes;

[0084] The voltage sag sensitive devices in the m voltage sag sensitive device groups are powered by the energy storage system module.

[0085] In some possible implementations, in terms of grouping x voltage sag sensitive devices based on x minimum compensation voltages through the sensitive device grouping module to obtain n voltage sag sensitive device groups, the processing unit 302 is specifically configured to:

[0086] Determine the maximum and minimum values ​​of x minimum compensation voltages through a sensitive device grouping module;

[0087] Determine a compensation voltage difference based on the maximum value and the minimum value;

[0088] Determine n interval ranges corresponding to the compensation voltage difference based on the maximum value and the minimum value; one interval range corresponds to one voltage sag sensitive device group;

[0089] Let x minimum compensation voltages fall within n intervals;

[0090] The voltage sag sensitive device corresponding to the minimum compensation voltage in each interval range of the n interval ranges is determined to obtain n voltage sag sensitive device groups.

[0091] In some possible implementations, in terms of powering the voltage sag sensitive devices in the m voltage sag sensitive device groups by using the energy storage system module, the processing unit 302 is specifically configured to:

[0092] Determine the economic loss value corresponding to each voltage sag sensitive device in the group of m voltage sag sensitive devices to obtain p economic loss values; each voltage sag sensitive device corresponds to one economic loss value; p is an integer greater than or equal to m;

[0093] Determine k economic loss values ​​greater than the economic loss threshold value among the p economic loss values; k is an integer;

[0094] Determine k voltage sag sensitive devices corresponding to k economic loss values;

[0095] Determine the priority corresponding to each of the k voltage sag sensitive devices based on the k economic loss values, and obtain k priorities; the greater the economic loss value corresponding to the voltage sag sensitive device, the higher the priority corresponding to the voltage sag sensitive device;

[0096] The energy storage system module supplies power to k voltage sag sensitive devices based on k priorities.

[0097] In some possible implementations, in determining the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device groups to obtain p economic loss values, the processing unit 302 is specifically configured to:

[0098] Obtain historical voltage sag data of x voltage sag sensitive devices within a preset historical time period;

[0099] Determine the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device groups based on historical voltage sag data, and obtain p economic loss values;

[0100] Wherein, the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device groups is determined based on the historical voltage sag data, including:

[0101] Determine the downtime and downtime frequency of a first voltage sag sensitive device within a preset historical time period; the first voltage sag sensitive device is any voltage sag sensitive device in a group of m voltage sag sensitive devices;

[0102] Determine the economic loss value caused by the first voltage sag sensitive equipment during the downtime to obtain a reference economic loss value;

[0103] Determine the target adjustment parameter corresponding to the shutdown frequency;

[0104] The reference economic loss value is adjusted according to the target adjustment parameter to obtain the economic loss value corresponding to the first voltage sag sensitive device.

[0105] In some possible implementations, the shared management device further includes a fast-cut switch module, which includes a plurality of fast-cut switches; each fast-cut switch corresponds to a voltage sag sensitive device, and the processing unit 302 is further specifically configured to:

[0106] The fast-cut switches corresponding to the k voltage sag sensitive devices are turned on through the fast-cut switch module, so that the energy storage system module supplies power to the k voltage sag sensitive devices based on the k priorities;

[0107] The fast-cut switches corresponding to the voltage sag sensitive devices other than k voltage sag sensitive devices among the x voltage sag sensitive devices are disconnected through the fast-cut switch module, so that the energy storage system module stops supplying power to the voltage sag sensitive devices other than k voltage sag sensitive devices among the x voltage sag sensitive devices.

[0108] In some possible implementations, after the energy storage system module performs a power supply operation on the voltage sag sensitive devices in the m voltage sag sensitive device groups, the processing unit 302 is specifically configured to:

[0109] Determine the first economic loss value caused by the target power park in the tth year; t is a positive integer;

[0110] Obtain the second economic loss value caused in the tth year when the target power park does not use the shared governance device;

[0111] The net income of the target power park in the tth year is determined based on the first economic loss value and the second economic loss value, and is calculated specifically according to the following formula:

[0112]

[0113] Among them, NPV 2 is the net income of the target power park in the tth year, T is the project planning period, C loss,b (t) is the second loss difference, C loss,a (t) is the first loss difference, M(t) is the service fee to be paid in year t, and r is the discount rate.

[0114] In some possible implementations, the processing unit 302 is further specifically configured to:

[0115] Determine the annual investment cost corresponding to the shared governance device;

[0116] The initial investment cost of the shared governance device is determined based on the annual investment cost, which is calculated according to the following formula:

[0117] C inv =T·C year +C remo +C lab

[0118] Among them, C inv is the initial investment cost, C year is the annual investment cost, C remo is the initial transformation cost of investment, C lab is the initial labor cost;

[0119] The net income of the investment company in year t is determined based on the initial investment cost, which is calculated according to the following formula:

[0120]

[0121] Among them, NPV 1 is the net income of the investment company in year t, C op (1) is the maintenance cost of the shared governance device in the first year, and f is the cost growth rate.

[0122] See also Figure 4 , Figure 4 Schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Figure 4 As shown, the electronic device 400 includes a transceiver 401, a processor 402 and a memory 403. They are connected via a bus 404. The memory 403 is used to store computer programs and data, and the transceiver 401 can transmit the data stored in the memory 403 to the processor 402. The above program includes instructions for executing the following steps:

[0123] Obtain x voltage sag sensitive devices in the target power park; x is an integer greater than 1;

[0124] Determine a minimum compensation voltage corresponding to each voltage sag sensitive device among the x voltage sag sensitive devices to obtain x minimum compensation voltages;

[0125] The x voltage sag sensitive devices are grouped based on the x minimum compensation voltages by a sensitive device grouping module to obtain n voltage sag sensitive device groups; n is an integer greater than 1 and less than x;

[0126] Determine the voltage amplitude corresponding to each voltage sag sensitive device group in the n voltage sag sensitive device groups through the transformer module to obtain n voltage amplitudes;

[0127] Determine the voltage sag amplitude threshold corresponding to the target power park;

[0128] Determine a voltage amplitude greater than a voltage sag amplitude threshold value among the n voltage amplitudes, and obtain m voltage amplitudes; m is an integer less than or equal to n;

[0129] Determine m voltage sag sensitive device groups corresponding to m voltage amplitudes;

[0130] The voltage sag sensitive devices in the m voltage sag sensitive device groups are powered by the energy storage system module.

[0131] In some possible implementations, in terms of grouping x voltage sag sensitive devices based on x minimum compensation voltages by the sensitive device grouping module to obtain n voltage sag sensitive device groups, the program includes instructions for performing the following steps:

[0132] Determine the maximum and minimum values ​​of x minimum compensation voltages through a sensitive device grouping module;

[0133] Determine a compensation voltage difference based on the maximum value and the minimum value;

[0134] Determine n interval ranges corresponding to the compensation voltage difference based on the maximum value and the minimum value; one interval range corresponds to one voltage sag sensitive device group;

[0135] Let x minimum compensation voltages fall within n intervals;

[0136] The voltage sag sensitive device corresponding to the minimum compensation voltage in each interval range of the n interval ranges is determined to obtain n voltage sag sensitive device groups.

[0137] In some possible implementations, in terms of supplying power to voltage sag sensitive devices in the m voltage sag sensitive device groups through the energy storage system module, the program includes instructions for executing the following steps:

[0138] Determine the economic loss value corresponding to each voltage sag sensitive device in the group of m voltage sag sensitive devices to obtain p economic loss values; each voltage sag sensitive device corresponds to one economic loss value; p is an integer greater than or equal to m;

[0139] Determine k economic loss values ​​greater than the economic loss threshold value among the p economic loss values; k is an integer;

[0140] Determine k voltage sag sensitive devices corresponding to k economic loss values;

[0141] Determine the priority corresponding to each of the k voltage sag sensitive devices based on the k economic loss values, and obtain k priorities; the greater the economic loss value corresponding to the voltage sag sensitive device, the higher the priority corresponding to the voltage sag sensitive device;

[0142] The energy storage system module supplies power to k voltage sag sensitive devices based on k priorities.

[0143] In some possible implementations, in terms of determining the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device groups to obtain p economic loss values, the program includes instructions for executing the following steps:

[0144] Obtain historical voltage sag data of x voltage sag sensitive devices within a preset historical time period;

[0145] Determine the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device groups based on historical voltage sag data, and obtain p economic loss values;

[0146] Wherein, the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device groups is determined based on the historical voltage sag data, including:

[0147] Determine the downtime and downtime frequency of a first voltage sag sensitive device within a preset historical time period; the first voltage sag sensitive device is any voltage sag sensitive device in a group of m voltage sag sensitive devices;

[0148] Determine the economic loss value caused by the first voltage sag sensitive equipment during the downtime to obtain a reference economic loss value;

[0149] Determine the target adjustment parameter corresponding to the shutdown frequency;

[0150] The reference economic loss value is adjusted according to the target adjustment parameter to obtain the economic loss value corresponding to the first voltage sag sensitive device.

[0151] In some possible implementations, the shared management device further includes a fast-cut switch module, the fast-cut switch module includes a plurality of fast-cut switches; each fast-cut switch corresponds to a voltage sag sensitive device, and the above program includes instructions for executing the following steps:

[0152] The fast-cut switches corresponding to the k voltage sag sensitive devices are turned on through the fast-cut switch module, so that the energy storage system module supplies power to the k voltage sag sensitive devices based on the k priorities;

[0153] The fast-cut switches corresponding to the voltage sag sensitive devices other than k voltage sag sensitive devices among the x voltage sag sensitive devices are disconnected through the fast-cut switch module, so that the energy storage system module stops supplying power to the voltage sag sensitive devices other than k voltage sag sensitive devices among the x voltage sag sensitive devices.

[0154] In some possible implementations, after the energy storage system module performs a power supply operation on the voltage sag sensitive devices in the m voltage sag sensitive device groups, the above program includes instructions for executing the following steps:

[0155] Determine the first economic loss value caused by the target power park in the tth year; t is a positive integer;

[0156] Obtain the second economic loss value caused in the tth year when the target power park does not use the shared governance device;

[0157] The net income of the target power park in the tth year is determined based on the first economic loss value and the second economic loss value, and is calculated specifically according to the following formula:

[0158]

[0159] Among them, NPV 2 is the net income of the target power park in the tth year, T is the project planning period, C loss,b (t) is the second loss difference, C loss,a (t) is the first loss difference, M(t) is the service fee to be paid in year t, and r is the discount rate.

[0160] In some possible implementations, the above program includes instructions for performing the following steps:

[0161] Determine the annual investment cost corresponding to the shared governance device;

[0162] The initial investment cost of the shared governance device is determined based on the annual investment cost, which is calculated according to the following formula:

[0163] C inv =T·C year +C remo +C lab

[0164] Among them, C inv is the initial investment cost, C year is the annual investment cost, C remo is the initial transformation cost of investment, C lab is the initial labor cost;

[0165] The net income of the investment company in year t is determined based on the initial investment cost, which is calculated according to the following formula:

[0166]

[0167] Among them, NPV 1 is the net income of the investment company in year t, C op(1) is the maintenance cost of the shared governance device in the first year, and f is the cost growth rate.

[0168] It should be understood that the electronic devices in this application may include smart phones (such as Android phones, iOS phones, Windows Phone phones, etc.), tablet computers, PDAs, laptops, mobile Internet devices MID (Mobile Internet Devices, MID for short) or wearable devices or servers, edge computing nodes, etc. The above electronic devices are only examples, not exhaustive, and include but are not limited to the above electronic devices.

[0169] The embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. The computer program is executed by a processor to implement part or all of the steps of any voltage sag control method recorded in the above method embodiment.

[0170] The embodiment of the present application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute part or all of the steps of any voltage sag control method recorded in the above method embodiment.

[0171] It should be noted that, for the above-mentioned various method implementations, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the implementations described in the specification are all optional implementations, and the actions and modules involved are not necessarily required by this application.

[0172] In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0173] In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways. For example, the device implementation described above is only schematic, such as the division of units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0174] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0175] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software program module.

[0176] If the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, 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, which is stored in a memory and includes several instructions for a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of each implementation method of the present application. The aforementioned memory includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0177] A person skilled in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, and the memory can include: a flash drive, a read-only memory (English: Read-Only Memory, abbreviated as: ROM), a random access memory (English: Random Access Memory, abbreviated as: RAM), a magnetic disk or an optical disk, etc.

[0178] The above is a detailed introduction to the implementation methods of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above implementation methods is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for controlling voltage sag, characterized in that: A shared governance device applied to a target power park, the shared governance device comprising a sensitive equipment grouping module, a transformer module, and an energy storage system module, the method comprising: Obtain x voltage sag sensitive devices in the target power park; x is an integer greater than 1; Determine a minimum compensation voltage corresponding to each of the x voltage sag sensitive devices to obtain x minimum compensation voltages; The x voltage sag sensitive devices are grouped based on the x minimum compensation voltages by the sensitive device grouping module to obtain n voltage sag sensitive device groups; n is an integer greater than 1 and less than x; Determine the voltage amplitude corresponding to each voltage sag sensitive device group in the n voltage sag sensitive device groups by the transformer module to obtain n voltage amplitudes; Determine a voltage sag amplitude threshold corresponding to the target power park; Determine a voltage amplitude greater than the voltage sag amplitude threshold value among the n voltage amplitudes, to obtain m voltage amplitudes; m is an integer less than or equal to n; Determine m voltage sag sensitive device groups corresponding to the m voltage amplitudes; The voltage sag sensitive devices in the m voltage sag sensitive device groups are powered by the energy storage system module.

2. The method according to claim 1, characterized in that The step of grouping the x voltage sag sensitive devices based on the x minimum compensation voltages by the sensitive device grouping module to obtain n voltage sag sensitive device groups includes: Determine the maximum value and the minimum value of the x minimum compensation voltages by the sensitive device grouping module; Determine a compensation voltage difference based on the maximum value and the minimum value; Determine n interval ranges corresponding to the compensation voltage difference based on the maximum value and the minimum value; one of the interval ranges corresponds to one of the voltage sag sensitive device groups; The x minimum compensation voltages fall within the n intervals; The voltage sag sensitive device corresponding to the minimum compensation voltage in each interval of the n intervals is determined to obtain the n voltage sag sensitive device groups.

3. The method according to claim 2, characterized in that The power supply operation for the voltage sag sensitive devices in the m voltage sag sensitive device groups is performed by the energy storage system module, including: Determine the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device group to obtain p economic loss values; each voltage sag sensitive device corresponds to one economic loss value; p is an integer greater than or equal to m; Determine k economic loss values ​​greater than the economic loss threshold value among the p economic loss values; k is an integer; Determine k voltage sag sensitive devices corresponding to the k economic loss values; Determine the priority corresponding to each of the k voltage sag sensitive devices based on the k economic loss values ​​to obtain k priorities; the greater the economic loss value corresponding to the voltage sag sensitive device, the higher the priority corresponding to the voltage sag sensitive device; The k voltage sag sensitive devices are powered by the energy storage system module based on the k priorities.

4. The method according to claim 3, characterized in that The determining the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device groups to obtain p economic loss values ​​includes: Obtaining historical voltage sag data of the x voltage sag sensitive devices within a preset historical time period; Determine the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device groups based on the historical voltage sag data to obtain the p economic loss values; Wherein, determining the economic loss value corresponding to each voltage sag sensitive device in the m voltage sag sensitive device groups based on the historical voltage sag data includes: Determine the shutdown duration and shutdown frequency of a first voltage sag sensitive device within the preset historical time period; the first voltage sag sensitive device is any voltage sag sensitive device in the m voltage sag sensitive device group; Determine the economic loss value caused by the first voltage sag sensitive device during the downtime to obtain a reference economic loss value; determining a target adjustment parameter corresponding to the shutdown frequency; The reference economic loss value is adjusted according to the target adjustment parameter to obtain the economic loss value corresponding to the first voltage sag sensitive device.

5. The method according to claim 3, characterized in that The shared management device further includes a fast-cut switch module, the fast-cut switch module includes a plurality of fast-cut switches; each of the fast-cut switches corresponds to one of the voltage sag sensitive devices; the method further includes: The fast-cut switches corresponding to the k voltage sag sensitive devices are turned on by the fast-cut switch module, so that the energy storage system module supplies power to the k voltage sag sensitive devices based on the k priorities; The fast-cut switches corresponding to the voltage sag sensitive devices other than the k voltage sag sensitive devices among the x voltage sag sensitive devices are disconnected by the fast-cut switch module, so that the energy storage system module stops supplying power to the voltage sag sensitive devices other than the k voltage sag sensitive devices among the x voltage sag sensitive devices.

6. The method according to any one of claims 1 to 5, characterized in that: After the energy storage system module performs a power supply operation on the voltage sag sensitive devices in the m voltage sag sensitive device groups, the method further includes: Determine the first economic loss value caused by the target power park in the tth year; t is a positive integer; Obtaining a second economic loss value caused by the target power park not using the shared governance device in the tth year; The net income of the target power park in the tth year is determined based on the first economic loss value and the second economic loss value, and is specifically calculated according to the following formula: Where NPV2 is the net profit of the target power park in the tth year, T is the project planning period, C loss,b (t) is the second loss difference, C loss,a (t) is the first loss difference, M(t) is the service fee to be paid in the tth year, and r is the discount rate.

7. The method according to claim 6, characterized in that The method further comprises: Determining the annual investment cost corresponding to the shared governance device; The initial investment cost of the shared governance device is determined based on the annual investment cost, and is specifically calculated according to the following formula: C inv =T·C year +C remo +C lab Among them, C inv is the initial investment cost, C year is the annual investment cost, C remo is the initial transformation cost of investment, C lab is the initial labor cost; The net income obtained by the investment company in the tth year is determined based on the initial investment cost, which is calculated specifically according to the following formula: Among them, NPV1 is the net income obtained by the investment company in the tth year, C op (1) is the maintenance cost of the shared governance device in the first year, and f is the cost growth rate.

8. A device for controlling voltage sag, characterized in that: The voltage sag-based governance device is applied to a shared governance device in a target power park, the shared governance device includes a sensitive equipment grouping module, a transformer module, and an energy storage system module, and the device includes: an acquisition unit and a processing unit; The acquisition unit is used to acquire x voltage sag sensitive devices in the target power park; x is an integer greater than 1; The processing unit is used to determine the minimum compensation voltage corresponding to each voltage sag sensitive device among the x voltage sag sensitive devices to obtain x minimum compensation voltages; The x voltage sag sensitive devices are grouped based on the x minimum compensation voltages by the sensitive device grouping module to obtain n voltage sag sensitive device groups; n is an integer greater than 1 and less than x; Determine the voltage amplitude corresponding to each voltage sag sensitive device group in the n voltage sag sensitive device groups by the transformer module to obtain n voltage amplitudes; Determine a voltage sag amplitude threshold corresponding to the target power park; Determine a voltage amplitude greater than the voltage sag amplitude threshold value among the n voltage amplitudes, to obtain m voltage amplitudes; m is an integer less than or equal to n; Determine m voltage sag sensitive device groups corresponding to the m voltage amplitudes; The voltage sag sensitive devices in the m voltage sag sensitive device groups are powered by the energy storage system module.

9. An electronic device, characterized in that: The method comprises a processor, a memory, a communication interface and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the one or more programs include instructions for executing the steps in the method described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement the method according to any one of claims 1 to 7.

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