Voltage reactive power control method, device, equipment, storage medium and product
By constructing a set of reactive power and voltage fitting curves and calculating the reactive power target value based on historical data, the problem of inaccurate voltage and reactive power control in existing technologies is solved, and the stability and efficiency of voltage regulation are improved.
Patent Information
- Application Number
- CN202511542616.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-01-06
AI Technical Summary
Existing voltage and reactive power control methods rely on equivalent impedance calculations, which makes voltage regulation prone to failure and unable to accurately match the relationship between voltage and reactive power, resulting in unstable voltage regulation at the grid connection point.
By constructing a set of reactive voltage fitting curves and determining the target reactive voltage fitting curve based on historical reactive voltage sampling data, the reactive target value is calculated according to the voltage target value, and voltage reactive power control is performed to reduce repeated adjustments and frequent equipment operation.
It improves the accuracy and efficiency of voltage and reactive power control, avoids voltage regulation failure, reduces repeated operation of equipment, and improves the stability of voltage regulation.
Smart Images
Figure CN121282879A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of voltage control technology, and in particular to voltage reactive power control methods, devices, equipment, storage media and products. Background Technology
[0002] Whether it's a standalone wind farm, photovoltaic power station, energy storage power station, or a hybrid wind-solar-storage power station, its high-voltage side grid connection point is equipped with an Automatic Voltage Control (AVC) system to stabilize voltage fluctuations at the grid connection point. The grid dispatching and management department periodically issues voltage regulation target values to the AVC system. The AVC system converts these target values into reactive power target values based on the real-time operating conditions within the station and distributes them to wind turbines, inverters, and energy storage converters to ensure that the real-time voltage at the grid connection point is close to the target value. While the AVC system's regulation target is the grid connection point voltage, equipment such as wind turbines, inverters, and energy storage converters generally only handle reactive power commands. Therefore, the AVC system needs to first convert the voltage target value issued by the dispatching department into a reactive power target value before distributing it to the generating equipment within the station. Currently, the common practice is to first calculate the equivalent impedance within the station and then use the relationship between voltage, impedance, and reactive power to calculate the reactive power target value. Due to the randomness of voltage and reactive power fluctuations, there is no strict one-to-one correspondence between the two. This often leads to inaccurate calculation of the system's equivalent impedance, resulting in a large deviation in the calculated reactive power target value, and ultimately causing the grid connection point voltage regulation to fail. Summary of the Invention
[0003] The main objective of this application is to provide a voltage reactive power control method, device, equipment, storage medium, and product, which aims to solve the technical problem that voltage regulation is prone to failure due to existing voltage reactive power control based on equivalent impedance.
[0004] To achieve the above objectives, this application proposes a voltage reactive power control method, which includes: In response to a voltage scheduling request, the target voltage value and scheduling time are determined based on the voltage scheduling request; The initial reactive voltage fitting curve is determined based on the generation time of each reactive voltage fitting curve in the reactive voltage fitting curve set and the scheduling time. The aforementioned reactive voltage fitting curve set is a set of curves showing the correspondence between reactive power values and voltage values obtained by fitting historical reactive voltage sampling data. The target reactive voltage fitting curve is determined based on the above initial reactive voltage fitting curve and the above set of reactive voltage fitting curves. Based on the above target reactive voltage fitting curve and the above target voltage value, the reactive power target value is determined, and voltage reactive power control is performed according to the above target reactive power value.
[0005] Optionally, before the step of determining the initial reactive voltage fitting curve based on the generation time of each reactive voltage fitting curve in the reactive voltage fitting curve set and the aforementioned scheduling time, the method further includes: Collect the reactive power and voltage values of the power station grid connection point within a preset period to obtain historical reactive voltage sampling data; The set of reactive voltage fitting curves was determined based on the aforementioned historical reactive voltage sampling data.
[0006] Optionally, the step of determining the set of reactive voltage fitting curves based on the aforementioned historical reactive voltage sampling data includes: If the sampling period corresponding to the above-mentioned historical reactive voltage sampling data is greater than or equal to the preset sampling period, the reactive voltage data pair is determined based on the above-mentioned historical reactive voltage sampling data. The above reactive voltage data pairs are preprocessed to obtain preprocessed reactive voltage data pairs. Based on the preprocessed reactive voltage data, the voltage value corresponding to the same reactive value is determined, and the target voltage value is determined based on the voltage value. The reactive voltage fitting curve is determined based on the target voltage value and the corresponding reactive power value, and a set of reactive voltage fitting curves is constructed based on the above reactive voltage fitting curves.
[0007] Optionally, the step of determining the target reactive voltage fitting curve based on the initial reactive voltage fitting curve and the set of reactive voltage fitting curves includes: Determine the Euclidean distance between the initial reactive voltage fitting curve and each reactive voltage fitting curve in the set of reactive voltage fitting curves; Based on the above Euclidean distance, the curve with the smallest Euclidean distance between the above reactive voltage fitting curve and the above initial reactive voltage fitting curve is selected from the above set of reactive voltage fitting curves to obtain the above target reactive voltage fitting curve.
[0008] Optionally, the step of determining the reactive power target value based on the target reactive voltage fitting curve and the target voltage value includes: The initial reactive target value corresponding to the above-mentioned voltage target value in the above-mentioned target reactive voltage fitting curve is determined by a linear interpolation strategy. The initial reactive power target value is corrected to obtain the reactive power target value.
[0009] Furthermore, to achieve the above objectives, this application also proposes a voltage reactive power control device, which includes: The response module is used to respond to a voltage scheduling request and determine the target voltage value and scheduling time based on the voltage scheduling request. The determination module is used to determine the initial reactive voltage fitting curve based on the generation time of each reactive voltage fitting curve in the reactive voltage fitting curve set and the above-mentioned scheduling time. The above-mentioned reactive voltage fitting curve set is a set of curves showing the correspondence between reactive power values and voltage values obtained by fitting historical reactive voltage sampling data. The matching module is used to determine the target reactive voltage fitting curve based on the above-mentioned initial reactive voltage fitting curve and the above-mentioned set of reactive voltage fitting curves; The voltage reactive power control module is used to determine the reactive power target value based on the above-mentioned target reactive power voltage fitting curve and the above-mentioned voltage target value, and to perform voltage reactive power control according to the above-mentioned reactive power target value.
[0010] In addition, to achieve the above objectives, this application also proposes a voltage reactive power control device, which includes a memory and a processor. The memory stores a computer program that can run on the processor, the computer program being configured to implement the voltage reactive power control method as described above.
[0011] In addition, to achieve the above objectives, this application also proposes a storage medium that is a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the voltage reactive power control method as described above.
[0012] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the voltage reactive power control method as described above.
[0013] In response to a voltage dispatch request, this application determines a target voltage value and a dispatch time based on the voltage dispatch request; determines an initial reactive voltage fitting curve based on the dispatch time; determines a target reactive voltage fitting curve based on the initial reactive voltage fitting curve and the set of reactive voltage fitting curves; determines a target reactive value based on the target reactive voltage fitting curve and the target voltage value; and performs voltage and reactive power control based on the target reactive value. Existing voltage regulation is based on real-time measurements of current voltage and reactive power. Specifically, it uses a direct reactive approach, switching capacitors on when the voltage is low and off when the voltage is high. This method relies on point data at the current moment and does not fully consider historical trends and system dynamics. It is prone to causing excessive voltage rise after capacitors are switched on, requiring capacitors to be switched off again, resulting in repeated adjustments. In actual operation, there is often a certain statistical regularity or functional relationship between voltage and reactive power. In this application, a set of reactive power-voltage fitting curves is constructed by using historical reactive power and voltage sampling data. This is equivalent to constructing a voltage-reactive power response model, which can predict "how much reactive power should be supplied to achieve voltage X". This makes voltage-reactive power control more closely match the actual response characteristics of the system, reducing the likelihood of over-compensation or under-compensation, increasing the probability of one-time adjustment, reducing repeated actions, and avoiding adjustment failures and frequent equipment operation. Attached Figure Description
[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a flowchart illustrating an embodiment of the voltage reactive power control method of this application. Figure 2 This is a flowchart illustrating Embodiment 2 of the voltage reactive power control method of this application; Figure 3 This is a schematic diagram of the overall process of the voltage reactive power control method in Embodiment 2 of this application; Figure 4 This is a schematic diagram of the fitting curve provided in Embodiment 2 of the voltage reactive power control method of this application; Figure 5 This is a schematic diagram of the architecture provided for Embodiment 2 of the voltage reactive power control method of this application; Figure 6 This is a schematic diagram of the module structure of the voltage reactive power control device according to an embodiment of this application; Figure 7This is a schematic diagram of the equipment structure of the hardware operating environment involved in the voltage reactive power control method in the embodiments of this application.
[0017] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0018] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.
[0019] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.
[0020] The main solution of this application embodiment is: to construct a set of reactive voltage fitting curves based on the collected historical reactive voltage sampling data; when voltage and reactive power control is required, to obtain the target reactive voltage fitting curve that best matches the current operating state by querying the set of reactive voltage fitting curves; and then to determine the reactive power target value for voltage and reactive power control based on the correspondence between reactive power value and voltage value in the target reactive voltage fitting curve and the voltage target value that needs to be adjusted.
[0021] The executing entity in this embodiment can be a voltage reactive power control device with data processing, network communication, and program execution functions. This device can be a tablet computer, personal computer, mobile phone, or any electronic device capable of performing the aforementioned functions. The following description uses a voltage reactive power control device as an example to illustrate this embodiment and the subsequent embodiments.
[0022] Based on this, the embodiments of this application provide a voltage reactive power control method, referring to... Figure 1 , Figure 1 This is a flowchart illustrating an embodiment of the voltage reactive power control method of this application.
[0023] In this embodiment, the voltage reactive power control method includes the following steps: Step S10: In response to the voltage scheduling request, determine the voltage target value and scheduling time based on the voltage scheduling request.
[0024] A voltage dispatch request can be a command issued by the dispatching department that requires voltage and reactive power control. It can include the target voltage value to be dispatched and the dispatching time when the voltage dispatch request is issued.
[0025] Step S20: Determine the initial reactive voltage fitting curve based on the generation time of each reactive voltage fitting curve in the reactive voltage fitting curve set and the scheduling time. The reactive voltage fitting curve set is a set of curves showing the correspondence between reactive power values and voltage values obtained by fitting historical reactive voltage sampling data.
[0026] In this embodiment, the reactive power and voltage sampling values at the power plant's grid connection point are stored at fixed intervals (e.g., 5 seconds). The reactive power and voltage sampling values stored at the same time are referred to as a data pair. For example, (10MVar, 110.2kV) represents a data pair where "the reactive power value is 10MVar and the voltage value is 110.2kV at a certain moment." When the cumulative storage time exceeds a set time period (e.g., 15 minutes), all "reactive power and voltage" data pairs within a certain time period (e.g., 15 minutes) are plotted on a coordinate system with reactive power value on the x-axis and voltage value on the y-axis. For example, if the current time is 14:30:00, all data pairs from 14:15:00 to 14:30:00 need to be plotted on the coordinate system to obtain the reactive power and voltage fitting curve. Optionally, for multiple voltage values with the same reactive power value, the median of all voltage values is calculated as the voltage value corresponding to the reactive power value to plot the reactive power and voltage fitting curve. The multiple sets of reactive voltage fitting curves drawn constitute a set of reactive voltage fitting curves, which can be a collection of historically drawn reactive voltage fitting curves.
[0027] The initial reactive voltage fitting curve can be the reactive voltage fitting curve that is closest to the generation time and the scheduling time.
[0028] Step S30: Determine the target reactive voltage fitting curve based on the initial reactive voltage fitting curve and the set of reactive voltage fitting curves.
[0029] The target reactive voltage fitting curve can be determined by selecting the curve with the smallest Euclidean distance from the initial reactive voltage fitting curve from the set of reactive voltage fitting curves.
[0030] Step S40: Determine the reactive power target value based on the target reactive voltage fitting curve and the voltage target value, and perform voltage reactive power control according to the reactive power target value.
[0031] The method for determining the reactive power target value based on the target reactive power voltage fitting curve and the target voltage value can be as follows: Based on the target reactive power voltage fitting curve, find the reactive power value corresponding to the target voltage value in the target reactive power voltage fitting curve; this is the reactive power target value. If there is no reactive power value corresponding to the target voltage value in the target reactive power voltage fitting curve, then determine the reference voltage value with the smallest difference from the target voltage value in the target reactive power voltage fitting curve, and use the reactive power value corresponding to the reference voltage value as the reactive power target value. Voltage reactive power control based on the reactive power target value can be achieved by allocating reactive power according to the reactive power target value and the rated capacity of each power generation device, thereby performing voltage reactive power control.
[0032] To avoid the impact of transformer losses and line losses on reactive power control efficiency, the steps for determining the target reactive power value based on the target reactive power voltage fitting curve and the target voltage value include: The initial reactive target value corresponding to the target reactive voltage fitting curve is determined by a linear interpolation strategy. The initial reactive power target value is corrected to obtain the reactive power target value.
[0033] The initial reactive power target value is corrected to obtain the reactive power target value, which can be the loss reactive power value corresponding to the transformer loss and line loss. The reactive power target value is equal to the loss reactive power value plus the initial reactive power target value.
[0034] This embodiment responds to a voltage dispatch request, determines the target voltage value and dispatch time based on the request, determines the initial reactive voltage fitting curve based on the dispatch time, determines the target reactive voltage fitting curve based on the initial reactive voltage fitting curve and the set of reactive voltage fitting curves, determines the target reactive power value based on the target reactive voltage fitting curve and the target voltage value, and performs voltage reactive power control based on the target reactive power value. Since this embodiment determines the target reactive power value based on the target reactive voltage fitting curve and the target voltage value, and performs voltage reactive power control based on the target reactive power value, compared to the existing method of voltage reactive power control based on calculated equivalent impedance within the station, this embodiment can avoid voltage regulation failure and improve voltage reactive power control efficiency.
[0035] This embodiment proposes voltage and reactive power control, which obtains the operating characteristics of "reactive power and voltage" at the power station's grid connection point at different times. Secondly, by matching the current and historical operating conditions, the most meaningful "reactive power and voltage" fitting curve is obtained. Finally, the voltage target value issued by the dispatching department is substituted into the reference curve to directly obtain the reactive power target value of the power station's grid connection point, effectively avoiding the regulation oscillation problem caused by factors such as inaccurate equivalent impedance calculation and voltage fluctuations at the power station's grid connection point.
[0036] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2 , Figure 2 This is a flowchart illustrating Embodiment 2 of the voltage reactive power control method of this application. Before step S20, the following steps are also included: Step S101: Collect the reactive power and voltage values of the power station grid connection point within a preset period to obtain historical reactive voltage sampling data; Collect the reactive power and voltage values of the power plant grid connection point within a preset period to obtain historical reactive voltage sampling data. This can be done by sampling the reactive power and voltage values according to a preset period (e.g., 5 seconds) and storing the historical reactive voltage sampling data. The reactive power and voltage values stored at the same moment in the historical reactive voltage sampling data are called a data pair. For example, (10MVar, 110.2kV) means a data pair of "reactive power value is 10MVar and voltage value is 110.2kV at a certain moment".
[0037] Step S102: Determine the set of reactive voltage fitting curves based on historical reactive voltage sampling data.
[0038] The reactive voltage fitting curve set determined based on historical reactive voltage sampling data can be constructed by plotting reactive power (i.e., reactive power value) on the x-axis and voltage value on the y-axis. All reactive voltage data pairs within a certain time period prior to the current time (depending on the set fitting period, i.e., the time length corresponding to the fitting curve, which can be understood as how often the fitting is performed, such as 15 minutes) are plotted on a coordinate system. For example, if the current time is 14:30:00, then all data pairs from 14:15:00 to 14:30:00 need to be plotted on the coordinate system to obtain the reactive voltage fitting curve. A reactive voltage fitting curve set is constructed based on the reactive voltage fitting curves corresponding to the historical reactive voltage sampling data. For multiple voltage values with the same reactive power value, the median of all voltage values is calculated as the voltage value corresponding to the reactive power value to plot the reactive voltage fitting curve.
[0039] In order to obtain a more accurate set of reactive voltage fitting curves, step S202 may include: determining reactive voltage data pairs based on historical reactive voltage sampling data when the sampling period corresponding to the historical reactive voltage sampling data is greater than or equal to the preset sampling period. The reactive voltage data pairs are preprocessed to obtain preprocessed reactive voltage data pairs. Based on the preprocessed reactive voltage data, the voltage value corresponding to the same reactive value is determined, and the target voltage value is determined based on the voltage value. The reactive voltage fitting curve is determined based on the target voltage value and the corresponding reactive value, and a set of reactive voltage fitting curves is constructed based on the reactive voltage fitting curve.
[0040] This embodiment collects and stores data according to a fixed period (e.g., 5 seconds). When the data collection time reaches the preset sampling period, such as 15 minutes, data fitting begins. The reactive voltage data pairs are preprocessed to obtain the preprocessed reactive voltage data pairs. This can be achieved by determining the number of voltage values corresponding to the same reactive value. If the number of voltage values corresponding to the same reactive value in the historical reactive voltage sampling data is less than the preset number, such as 3, these data are considered invalid and discarded to obtain the preprocessed reactive voltage data pairs. The voltage values corresponding to the same reactive value are determined based on the preprocessed reactive voltage data pairs, and the target voltage value is determined based on these voltage values. This can be achieved by using the median of the voltage values corresponding to the same reactive value as the target voltage value. The reactive voltage fitting curve is determined based on the target voltage value and the corresponding reactive value. The reactive voltage fitting curve set can be constructed by taking the median of all voltage values corresponding to the same reactive value to obtain the target voltage value, plotting the data on a coordinate system with the reactive value on the x-axis and the target voltage value on the y-axis; then, according to the reactive value from smallest to largest, these medians are connected in sequence to form a "reactive voltage" fitting curve, i.e., the reactive voltage fitting curve.
[0041] In specific implementation, it can be referred to Figure 3 , Figure 3 This is a schematic diagram of the overall process for Embodiment 2 of the voltage reactive power control method of this application; this embodiment includes: Step 1: Store the reactive power and voltage sampling values at the power plant's grid connection point according to a fixed period (e.g., 5 seconds). The reactive power and voltage sampling values stored at the same time are called a data pair. For example, (10MVar, 110.2kV) represents a data pair where "the reactive power value is 10MVar and the voltage value is 110.2kV at a certain moment".
[0042] Step 2: Determine whether the cumulative storage time up to the current moment exceeds the set time period length (e.g., 15 minutes). If yes, proceed to Step 3; otherwise, return to Step 1.
[0043] Step 3: Determine if "the system has a fitted record". If yes, proceed to Step 4; otherwise, proceed to Step 5.
[0044] Step 4: Determine whether the time interval between the last fitted record and the current time exceeds the set time interval (e.g., 5 minutes). If yes, proceed to Step 5; otherwise, proceed to Step 7.
[0045] Step 5: Plot all "reactive power-voltage" data pairs within a specified time period (e.g., 15 minutes) back to the current time on a coordinate system, with reactive power value on the x-axis and voltage value on the y-axis. For example, if the current time is 14:30:00, all data pairs from 14:15:00 to 14:30:00 should be plotted on the coordinate system. If the number of data pairs corresponding to the same reactive power value is less than a reasonable value (e.g., 3), these data pairs are considered invalid and discarded. For example, if the reactive power value is 10MVar, and there are only two data pairs (10MVar, 110.2kV) and (10MVar, 110.5kV), which is less than 3, these data pairs will not be included in the statistics to prevent abnormal data from interfering with the results.
[0046] Step 6: For the same reactive power value, take the median of all corresponding voltage values and plot them on a coordinate system; then, connect these medians sequentially according to the reactive power value from smallest to largest to form a "reactive power-voltage" fitting curve, and store it. (Refer to...) Figure 4 , Figure 4 This is a schematic diagram of the fitting curve provided in Embodiment 2 of the voltage reactive power control method of this application. Assuming that there are 11 different reactive power values in all data pairs (invalid data has been removed), their corresponding voltage values are plotted on the coordinate system, the median is calculated, and they are connected in sequence to form a "reactive power-voltage" fitting curve.
[0047] Step 7: Determine if the dispatching department has issued a new voltage target value. If yes, proceed to Step 8; otherwise, return to Step 1.
[0048] Step 8: Record the time when the dispatching department issues the voltage target value as... Calculate the distance by following steps 5 and 6. The fitting curve of the "reactive voltage" of the most recent set of data pairs at time is denoted as . For example: Suppose At time 15:00:00, following steps Step 5 to Step 6, fit all the data pairs from 14:45:00 to 15:00:00 into a "reactive voltage" curve.
[0049] Step 9: Select All "reactive voltage" fitting curves stored within a certain period prior to the specified time (e.g., 30 days) (excluding) ), calculate curve The Euclidean distances between these historical fitted curves and the curves are such that the curve with the smallest distance is called the "reference curve," denoted as . .
[0050] Step 10: Record the voltage target value issued by the dispatching department as... ,Will Substitute the reference curve Through linear interpolation, the following is calculated: Corresponding reactive power value Considering transformer losses and line losses, for Make corrections to obtain This is taken as the reactive power target value. Considering the operating conditions of various power generation equipment, the reactive power target value is... Distribute power to power generation equipment such as wind turbines, inverters, and energy storage converters according to a certain strategy to achieve a closed-loop regulation. Return to Step 1.
[0051] Furthermore, the overall architecture diagram of this embodiment can be referred to... Figure 5 , Figure 5 This is a schematic diagram of the architecture of the voltage reactive power control method according to Embodiment 2 of this application. The architecture of this embodiment includes five parts: a signal acquisition module, a data storage module, a logic operation module, a device management module, and a scheduling communication module. The specific functions of each part are as follows: Signal acquisition module: mainly responsible for acquiring electrical quantity signal data such as voltage, active power, and reactive power of grid-connected equipment.
[0052] Data storage module: mainly responsible for the periodic storage of raw values of electrical quantity signal data, as well as the periodic storage of statistical data such as "reactive voltage" fitting curve.
[0053] The logic operation module is mainly responsible for calculating the "reactive voltage" fitting curve, converting the voltage target value into the reactive target value, and calculating transformer losses and line losses.
[0054] Equipment Management Module: Primarily responsible for collecting real-time operating data of power generation equipment such as wind turbines, inverters, and energy storage converters, as well as distributing the reactive power target values assigned by the logic operation module to these devices.
[0055] The dispatch communication module is mainly responsible for receiving voltage target values issued by the power grid dispatch management department and sending the main real-time operating status information of the station to the dispatch department.
[0056] This embodiment collects the reactive power and voltage values of the power station's grid connection point within a preset period to obtain historical reactive power and voltage sampling data; based on the historical reactive power and voltage sampling data, a set of reactive power and voltage fitting curves is determined. This embodiment fits the historically stored "reactive power and voltage" grouped data using the median fitting method to obtain several fitting curves; secondly, it calculates the matching degree between the current period's "reactive power and voltage" change trend and the historical fitting curves, selecting the curve with the highest matching degree as the reference curve; finally, it substitutes the voltage target value issued by the dispatching department into the selected "reactive power and voltage" reference curve to obtain the corresponding reactive power target value, and then splits and distributes the reactive power target value to the power generation equipment within the station to achieve stable control of the grid connection point voltage.
[0057] The above examples are only for understanding this application and do not constitute a limitation on the voltage reactive power control method of this application. Any simple modifications based on this technical concept are within the protection scope of this application.
[0058] This application also provides a voltage reactive power control device, please refer to... Figure 6 The voltage reactive power control device includes: Response module 10 is used to respond to a voltage scheduling request and determine the target voltage value and scheduling time based on the voltage scheduling request; The determination module 20 is used to determine the initial reactive voltage fitting curve based on the generation time of each reactive voltage fitting curve in the reactive voltage fitting curve set and the scheduling time. The reactive voltage fitting curve set is a set of curves showing the correspondence between reactive power values and voltage values obtained by fitting historical reactive voltage sampling data. Matching module 30 is used to determine the target reactive voltage fitting curve based on the initial reactive voltage fitting curve and the set of reactive voltage fitting curves; The voltage and reactive power control module 40 is used to determine the reactive power target value based on the target reactive power voltage fitting curve and the voltage target value, and to perform voltage and reactive power control according to the reactive power target value.
[0059] This embodiment responds to a voltage dispatch request, determines the target voltage value and dispatch time based on the request, determines the initial reactive voltage fitting curve based on the dispatch time, determines the target reactive voltage fitting curve based on the initial reactive voltage fitting curve and the set of reactive voltage fitting curves, determines the target reactive power value based on the target reactive voltage fitting curve and the target voltage value, and performs voltage reactive power control based on the target reactive power value. Since this embodiment determines the target reactive power value based on the target reactive voltage fitting curve and the target voltage value, and performs voltage reactive power control based on the target reactive power value, compared to the existing method of voltage reactive power control based on calculated equivalent impedance within the station, this embodiment can avoid voltage regulation failure and improve voltage reactive power control efficiency.
[0060] The voltage reactive power control device provided in this application, employing the voltage reactive power control method described in the above embodiments, can solve the technical problem that existing voltage reactive power control based on equivalent impedance easily leads to voltage regulation failure. Compared with the prior art, the beneficial effects of the voltage reactive power control device provided in this application are the same as those of the voltage reactive power control method provided in the above embodiments, and other technical features in the voltage reactive power control device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.
[0061] This application provides a voltage reactive power control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the voltage reactive power control method in the above embodiment 1.
[0062] The following is for reference. Figure 7 The diagram illustrates a structural schematic of a voltage and reactive power control device suitable for implementing embodiments of this application. The voltage and reactive power control device in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 7 The voltage and reactive power control device shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.
[0063] like Figure 7As shown, the voltage reactive power control device may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the voltage reactive power control device. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. Communication device 1009 allows the voltage reactive power control device to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows voltage reactive power control devices with various systems, it should be understood that implementation or possession of all the systems shown is not required. More or fewer systems may be implemented alternatively.
[0064] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.
[0065] The voltage reactive power control device provided in this application, employing the voltage reactive power control method described in the above embodiments, can solve the technical problem that existing voltage reactive power control based on equivalent impedance easily leads to voltage regulation failure. Compared with the prior art, the beneficial effects of the voltage reactive power control device provided in this application are the same as those of the voltage reactive power control method provided in the above embodiments, and other technical features of this voltage reactive power control device are the same as those disclosed in the previous embodiment method, and will not be repeated here.
[0066] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.
[0067] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
[0068] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the voltage reactive power control method in the above embodiments.
[0069] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CDROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.
[0070] The aforementioned computer-readable storage medium may be included in the voltage and reactive power control device; or it may exist independently and not be assembled into the voltage and reactive power control device.
[0071] Computer program code for performing the operations of this application can be written in one or more programming languages or a combination thereof. These programming languages include object-oriented programming languages—such as Python, Java, Smalltalk, and C++—and conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).
[0072] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.
[0073] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.
[0074] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described voltage reactive power control method. This solves the technical problem that existing voltage reactive power control based on equivalent impedance easily leads to voltage regulation failure. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the voltage reactive power control method provided in the above embodiments, and will not be repeated here.
[0075] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the voltage reactive power control method described above.
[0076] The computer program product provided in this application can solve the technical problem that voltage regulation is prone to failure due to existing voltage reactive power control based on equivalent impedance. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the voltage reactive power control method provided in the above embodiments, and will not be repeated here.
[0077] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. All equivalent structural transformations made under the technical concept of this application and using the content of this application specification and drawings, or direct / indirect applications in other related technical fields, are included in the scope of protection of this application.
Claims
1. A method of voltage reactive control, characterized in that, The voltage reactive power control method comprises the following steps: In response to a voltage scheduling request, determining a voltage target value and a scheduling time based on the voltage scheduling request; Based on the generation time of each reactive voltage fitting curve in the set of reactive voltage fitting curves and the scheduling time, an initial reactive voltage fitting curve is determined, and the set of reactive voltage fitting curves is a set of corresponding relationship curves of reactive power values and voltage values fitted according to historical reactive voltage sampling data; Determine the target reactive voltage fitting curve according to the initial reactive voltage fitting curve and the set of reactive voltage fitting curves; Based on the target reactive voltage fitting curve and the voltage target value, determine the reactive target value, and perform voltage reactive power control according to the reactive target value.
2. The method of voltage reactive control as claimed in claim 1, wherein, Before the step of determining the initial reactive voltage fitting curve based on the generation time of each reactive voltage fitting curve in the set of reactive voltage fitting curves and the scheduling time, it further comprises: Collect the reactive power values and voltage values of the power station grid connection point in the preset period to obtain the historical reactive voltage sampling data; In the case that the sampling period corresponding to the historical reactive voltage sampling data is greater than or equal to the preset sampling period, the set of reactive voltage fitting curves is determined based on the historical reactive voltage sampling data.
3. The method of voltage reactive control as claimed in claim 2, wherein, The step of determining the set of reactive voltage fitting curves based on the historical reactive voltage sampling data comprises: Determine the reactive voltage data pair according to the historical reactive voltage sampling data; Data preprocessing is performed on the reactive voltage data pair to obtain the preprocessed reactive voltage data pair; Determine the voltage value corresponding to the same reactive value based on the preprocessed reactive voltage data pair, and determine the target voltage value based on the voltage value; Determine the reactive voltage fitting curve according to the target voltage value and the reactive value corresponding to the target voltage value, and construct the set of reactive voltage fitting curves based on the reactive voltage fitting curve.
4. The method of voltage reactive control according to any of claims 1 to 3, characterized in that The step of determining the target reactive voltage fitting curve according to the initial reactive voltage fitting curve and the set of reactive voltage fitting curves comprises: Determine the Euclidean distance between the initial reactive voltage fitting curve and each reactive voltage fitting curve in the set of reactive voltage fitting curves; Determine the curve with the smallest Euclidean distance between the initial reactive voltage fitting curve in the set of reactive voltage fitting curves, and take it as the target reactive voltage fitting curve.
5. The method of voltage reactive control according to any of claims 1 to 3, characterized in that The step of determining the reactive target value based on the target reactive voltage fitting curve and the voltage target value comprises: Determine the initial reactive target value corresponding to the voltage target value in the target reactive voltage fitting curve through linear interpolation strategy; Correct the initial reactive target value to obtain the reactive target value.
6. A voltage and reactive power control device, characterized by The voltage reactive power control device comprises: A response module for determining a voltage target value and a scheduling time based on the voltage scheduling request in response to a voltage scheduling request; The determining module is configured to determine an initial reactive voltage fitting curve based on generation times of each reactive voltage fitting curve in a set of reactive voltage fitting curves and the scheduling moment, the set of reactive voltage fitting curves being a set of corresponding relation curves of reactive power values and voltage values fitted according to historical reactive voltage sampling data; The matching module is configured to determine a target reactive voltage fitting curve according to the initial reactive voltage fitting curve and the set of reactive voltage fitting curves; The voltage reactive control module is configured to determine a reactive target value based on the target reactive voltage fitting curve and the voltage target value, and perform voltage reactive control according to the reactive target value.
7. A voltage and reactive power control device, characterized by The device comprises a memory and a processor, the memory stores a computer program, the program code comprises instructions, and the processor reads the instructions from the memory, so that the voltage reactive control device implements the voltage reactive control method in any one of claims 1 to 5.
8. A storage medium, characterized by The storage medium is a computer readable storage medium, and the storage medium stores a computer program, which is executed by a processor to implement the voltage reactive control method in any one of claims 1 to 5.
9. A computer program product, characterised in that, The computer program product comprises a computer program, which is executed by a processor to implement the voltage reactive control method in any one of claims 1 to 5. The computer program product comprises a computer program, which is executed by a processor to implement the voltage reactive control method in any one of claims 1 to 5.