Power device balance compensation method for user side based on steinmetz balance method

Abstract

The application provides a power equipment balance compensation method for a user end based on the Steinmetz balance method, relates to the technical field of power equipment balance compensation, and comprises the following steps: acquiring three-phase unbalance information of power equipment of a user end, obtaining three-phase demand compensation values, setting multiple adjustment sections, performing three-phase adjustment section synchronous compensation and adjustment section update decomposition, and obtaining three-phase compensation adjustment data after update decomposition; setting adjustment nodes according to adjustment section information, acquiring coupling influence data of the adjustment section, determining coupling adjustment compensation values according to the coupling influence data, performing demand value compensation on demand value compensation values of the next adjustment section, and obtaining coupling compensation adjustment information; filling and updating a preset three-phase balance diagram according to the three-phase compensation adjustment data and the coupling compensation adjustment information, and obtaining a three-phase balance point; and the application improves the accuracy, flexibility and visualization of three-phase power balance compensation.

Description

Technical Field

[0001] This invention proposes a user-side power equipment balance compensation method based on the Steinmetz balance method, which relates to the field of power equipment balance compensation technology, specifically to the field of balance compensation technology of the Steinmetz balance method. Background Technology

[0002] In practical applications, three-phase imbalance is a common phenomenon. Three-phase imbalance can lead to numerous problems, such as increased line losses, reduced equipment lifespan, and impacted power quality. Traditional compensation methods, by neglecting the synchronicity of three-phase compensation, result in significant errors in the compensation process, leading to unstable balance and poor compensation effectiveness. Furthermore, the lack of reasonable setting and dynamic updating of the adjustment sections during compensation adjustment prevents timely adjustments to the compensation strategy based on changes in actual compensation demand, resulting in a lack of flexibility and accuracy. Simultaneously, existing methods often overlook the coupling effects between adjustment sections and fail to fully consider the interrelationships between the compensation amounts of each section, leading to unsatisfactory compensation results and difficulty in achieving an ideal three-phase balance. Summary of the Invention

[0003] This invention provides a user-side power equipment balance compensation method based on the Steinmetz balance method to solve the above-mentioned problems:

[0004] The present invention proposes a user-end power equipment balance compensation method based on the Steinmetz balance method, the method comprising:

[0005] S1. Obtain three-phase imbalance information from the user's electrical equipment, obtain the three-phase demand compensation value, set multiple adjustment sections according to the demand compensation value, perform synchronous compensation of the three-phase adjustment sections, update and decompose the adjustment sections according to the demand change value of the compensation amount demand value, and obtain the updated and decomposed three-phase compensation adjustment data.

[0006] S2. Set the control node according to the control section information, obtain the coupling effect data of the control section, determine the coupling control compensation amount according to the coupling effect data, perform the compensation amount demand value compensation for the next control section, and obtain the coupling compensation control information.

[0007] S3. Fill and update the preset three-phase balance diagram based on the three-phase compensation adjustment data and coupled compensation adjustment information to obtain the three-phase balance point.

[0008] Furthermore, the system includes:

[0009] The adjustment and compensation module is used to acquire three-phase imbalance information of the power equipment at the user end, obtain the three-phase demand compensation value, set multiple adjustment sections according to the demand compensation value, perform synchronous compensation of the three-phase adjustment sections, update and decompose the adjustment sections according to the demand change value of the compensation amount, and obtain the updated and decomposed three-phase compensation adjustment data.

[0010] The compensation update module is used to set the adjustment node according to the adjustment segment information, obtain the coupling effect data of the adjustment segment, determine the coupling adjustment compensation amount according to the coupling effect data, perform the demand value compensation of the compensation amount requirement value of the next adjustment segment, and obtain the coupling compensation adjustment information.

[0011] The visualization module is used to fill and update the preset three-phase balance diagram based on the three-phase compensation adjustment data and coupled compensation adjustment information to obtain the three-phase balance point.

[0012] The beneficial effects of this invention are as follows: By decomposing the demand compensation value into multiple adjustment segments and performing synchronous compensation, the compensation process can be controlled more precisely, reducing three-phase imbalance caused by insufficient or excessive compensation. By setting multiple adjustment segments and a synchronous compensation mechanism, the compensation amount of each phase can be controlled more precisely, reducing three-phase imbalance caused by insufficient or excessive compensation. Simultaneously, considering the coupling effect between the three phases, the accuracy of compensation is further improved through coupled compensation.

[0013] Precise three-phase imbalance compensation reduces line losses and equipment failures caused by three-phase imbalance, lowers operation and maintenance costs, and improves operation and maintenance efficiency. It also improves the power quality of the power system and reduces problems such as voltage fluctuations and current harmonics. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a power balance compensation method for user-side electrical equipment based on the Steinmetz balance method. Detailed Implementation

[0015] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0016] In one embodiment of the present invention, the present invention proposes a user-end power equipment balance compensation method based on the Steinmetz balance method, the method comprising:

[0017] S1. Obtain three-phase imbalance information from the user's electrical equipment, obtain the three-phase demand compensation value, set multiple adjustment sections according to the demand compensation value, perform synchronous compensation of the three-phase adjustment sections, update and decompose the adjustment sections according to the demand change value of the compensation amount demand value, and obtain the updated and decomposed three-phase compensation adjustment data.

[0018] S2. Set the control node according to the control section information, obtain the coupling effect data of the control section, determine the coupling control compensation amount according to the coupling effect data, perform the compensation amount demand value compensation for the next control section, and obtain the coupling compensation control information.

[0019] S3. Based on the three-phase compensation adjustment data and coupled compensation adjustment information, fill and update the preset three-phase balance diagram to obtain the three-phase balance point, such as... Figure 1 As shown.

[0020] The working principle and technical effect of the above technical solution are as follows: By installing measuring devices such as power analyzers, current transformers, and voltage transformers on the three-phase lines of the user-end power equipment, parameters such as voltage, current, and power factor of the three phases are collected. The imbalance of the three-phase load is analyzed using these parameters to obtain the required compensation value for each phase. The magnitude and direction of the required compensation value depend on the reactive power status of each phase. For example, if a phase exhibits inductive load characteristics (current lags behind voltage), reactive power compensation is required; if it exhibits capacitive load characteristics (current leads voltage), reactive power absorption is required.

[0021] Based on the obtained compensation demand value for each phase, it is decomposed into multiple adjustment segments. The division of adjustment segments can be determined according to actual demand and the characteristics of the compensation equipment, and is not limited here. Within each adjustment segment, a synchronous control strategy is adopted to compensate the three phases synchronously. This can be achieved through a reactive power compensation controller, which controls the switching or adjustment of compensation equipment (such as capacitor banks, reactors, etc.) according to preset adjustment segment parameters to achieve reactive power compensation for the three phases.

[0022] During the compensation process, the change in the compensation demand for each phase is monitored in real time. This can be achieved by continuously collecting three-phase power data and comparing it with the data from the previous moment. When the change in demand exceeds a preset threshold, it indicates a significant change in the load conditions, requiring an update and decomposition of the adjustment segment. Based on the magnitude and direction of the change in demand, the compensation amount of the remaining adjustment segment is redistributed to ensure that the compensation process can adapt to load changes in a timely manner, keeping the three-phase compensation effective at all times.

[0023] A regulating node is established between every two adjacent regulating sections. At each regulating node, voltage, current, and other coupling effect data are collected. These data reflect the interaction and influence between the three phases during the compensation process. By analyzing the coupling effect data, the coupling regulation compensation amount is determined, which is used to correct the compensation requirement value of the next regulating section, achieving more accurate compensation.

[0024] Analyze the coupling effect data to determine the coupling adjustment compensation amount. At the beginning of the next adjustment segment, obtain the updated compensation requirement value, i.e., the coupling compensation requirement value. Perform compensation adjustment for the next adjustment segment based on the coupling compensation requirement value, and record the coupling compensation adjustment information.

[0025] A preset three-phase balance diagram is established with time on the x-axis and three-phase load power data on the y-axis. The acquired three-phase compensation and adjustment data and coupled compensation and adjustment information are then filled into the preset three-phase balance diagram in chronological order. The three-phase balance diagram, with time on the x-axis and three-phase load power data on the y-axis, forms a three-phase power adjustment curve by connecting the power points before and after compensation in each adjustment segment.

[0026] A preset three-phase balance diagram is established with time on the x-axis and three-phase load power data on the y-axis. Based on the acquired three-phase compensation and adjustment data, the power points before and after compensation are marked on the balance diagram and connected to form a curve. Simultaneously, the curve is corrected and improved based on the coupled compensation and adjustment information. In the balance diagram, a straight line parallel to the x-axis is drawn based on the average three-phase load power as the reactive power standard line, with its allowable upper and lower ranges set according to actual operating requirements. When the three-phase power adjustment curves simultaneously intersect the reactive power standard line (both within the acceptable range), a three-phase balance state is achieved, and the intersection point obtained at this time is the three-phase balance point.

[0027] By decomposing the demand compensation value into multiple adjustment segments and performing synchronous compensation, the compensation process can be controlled more precisely, reducing three-phase imbalance caused by insufficient or excessive compensation.

[0028] By setting multiple adjustment sections and a synchronous compensation mechanism, the compensation amount of each phase can be controlled more precisely, reducing three-phase imbalance caused by insufficient or excessive compensation. Simultaneously, considering the coupling effects between the three phases, coupling compensation further improves the accuracy of the compensation.

[0029] Precise three-phase imbalance compensation reduces line losses and equipment failures caused by three-phase imbalance, lowers maintenance costs, and improves maintenance efficiency.

[0030] Precise three-phase imbalance compensation improves the power quality of the power system and reduces problems such as voltage fluctuations and current harmonics.

[0031] In one embodiment of the present invention, S1 includes:

[0032] The initial three-phase load power data of the power equipment at the user end is obtained. Based on the initial three-phase load power data, the phase difference between the current and voltage of each phase of the power equipment is obtained. Based on the phase difference, the imbalance factor of each phase of the power equipment is determined, and the imbalance factor determination result of each phase of the power equipment is obtained.

[0033] The imbalance factors include inductive loads and capacitive loads. For example, if the three phases are phase A, phase B, and phase C, and the phase difference of phase A is positive, it means that the load of phase A is inductive (current lags behind voltage), and the inductive load absorbs reactive power. If the phase difference of phases B and C is negative, it means that phases B and C are capacitive (current leads voltage), and the capacitive load generates reactive power.

[0034] The average three-phase load power is calculated based on the three-phase load power data, and the load power difference of each phase is calculated based on the average three-phase load power and the three-phase load power data; for example, the difference between the load power data of phase A and the average three-phase load power is the load power difference of phase A.

[0035] The demand compensation value for each phase is obtained by combining the load power difference of each phase with the corresponding imbalance factor judgment result, and the imbalance adjustment of each phase is carried out according to the demand compensation value; that is, reactive power compensation or absorption.

[0036] During the imbalance adjustment process of each phase, the adjustment segment is decomposed and updated by demand compensation value. The three phases of the equipment are compensated in segments according to the adjustment segment to obtain segment compensation data until the three-phase compensation is completed. The three-phase compensation adjustment data and the updated three-phase load power data after the three-phase compensation adjustment are obtained. The three-phase imbalance is judged to obtain the adjustment status information.

[0037] Each phase represents one of phases A, B, and C;

[0038] Example of adjustment:

[0039] A capacitor is connected in parallel with phase A, and inductors are connected in parallel with phases B and C to balance the power. Assuming that the desired power factor of all three phases is 1 after compensation (i.e., reactive power is fully compensated), the reactive power QCA to be compensated for phase A can be calculated using the power triangle. Assuming that the power factor of phase A before compensation is 0.8 (lagging), then QCA = PAtan(arccos0.8 - arccos1) = 5 × tan(36.87° - 0°) ≈ 3.75 kvar (this is just a simple example).

[0040] Calculate the capacitance value: C = 2πfU21QCA = 2π × 50 × 22021 × 3750 ≈ 247μF.

[0041] Calculate the inductance value: Assuming the power factor of phase B before compensation is 0.6 (lagging), the reactive power to be compensated is QLB=PBtan(arccos0.6-arccos1)=3×tan(53.13°-0°)≈4kvar;

[0042] L=2πfQLBU2=2π×50×40002202≈3.82mH.

[0043] A 247μF capacitor is connected in parallel to phase A, and a 3.82mH inductor is connected in parallel to phase B. Then, the three-phase current and neutral current are measured to obtain the three-phase imbalance and determine the regulation status (whether it has reached an acceptable balance range).

[0044] The working principle and technical effect of the above technical solution are as follows: the initial three-phase load power data of the user-end power equipment is obtained by measuring equipment, the phase difference between the current and voltage of each phase is calculated, and the positive or negative phase difference is used to determine whether each phase load is inductive (absorbing reactive power) or capacitive (generating reactive power), thus obtaining the unbalance factor determination result.

[0045] Calculate the average power of the three-phase load, and then calculate the power difference of each phase load based on the three-phase load power data.

[0046] Based on the load power difference of each phase and the results of the imbalance factor determination, the required compensation value of each phase is determined, and the imbalance adjustment of each phase is carried out accordingly, that is, the compensation or absorption of reactive power.

[0047] During the adjustment process, the demand compensation value is decomposed into multiple adjustment segments, and the three phases are compensated in segments. At the same time, the demand change value is monitored, and the adjustment segments are updated according to the change until the three-phase compensation is completed. The compensation adjustment data and the updated load power data are obtained, and finally the three-phase imbalance is determined to obtain the adjustment status information.

[0048] By accurately identifying the factors causing the three-phase imbalance and calculating the required compensation value, reactive power compensation or absorption can be performed on each phase in a targeted manner, thereby improving the accuracy of the compensation.

[0049] A segmented compensation method is adopted, and the adjustment segment is updated in real time according to changes in demand, making the compensation process more flexible and adaptable to dynamic changes in load.

[0050] By acquiring three-phase compensation and adjustment data, updating three-phase load power data and adjustment status information, the three-phase imbalance adjustment process can be monitored in real time, facilitating timely detection and resolution of problems, and reducing the occurrence of abnormal situations and the expansion of losses.

[0051] Update the three-phase load power to the final adjusted three-phase load power.

[0052] In one embodiment of the present invention, the process of decomposing and updating the adjustment segment through demand compensation value, and then performing segmented compensation on the three phases of the equipment according to the adjustment segment to obtain segmented compensation data, continues until the three-phase compensation is completed. This includes:

[0053] Obtain the compensation requirement value for each of the three phases, and decompose the compensation requirement value for each phase into N adjustment segments;

[0054] The formula for calculating N is:

[0055]

[0056] Where N is the number of adjustment sections, tmax is the largest compensation demand among the three phases, and tmin is the smallest allowable compensation flow rate among the three phases; this formula is applicable to three-phase unbalanced systems.

[0057] When tmax-tmin is larger, the compensation gap between the three phases is larger. When the compensation gap is larger, the number of adjustment sections should be larger. Otherwise, if the compensation amplitude of the phase with the largest compensation demand is too large, it will cause compensation instability.

[0058] Synchronous compensation is performed on each regulation segment of the three phases to obtain the compensation results of the regulation segment;

[0059] Obtain the change value of the compensation demand value for each phase, perform change state analysis on the change value of the demand, obtain the change analysis judgment result, and trigger the adjustment section update analysis command according to the change analysis judgment result;

[0060] The change in demand is compared with a preset change threshold to obtain the comparison result of the change in demand. When the change in demand is greater than the preset change threshold, the adjustment segment update analysis instruction is triggered.

[0061] The updated remaining adjustment segment is obtained by updating and decomposing the change value of the compensation demand based on the remaining adjustment segment;

[0062] According to the updated remaining adjustment section, the single phase with demand change value continues to be adjusted in the same batch as other single phases until the compensation demand value of each of the three phases is synchronously adjusted and the three-phase compensation adjustment data is obtained.

[0063] This scheme mainly involves dividing the adjustment segment during the adjustment process.

[0064] The working principle and technical effect of the above technical solution are as follows: First, obtain the compensation demand value of each phase in the three phases, and decompose it into N adjustment sections.

[0065] Compensation operations are performed simultaneously on each of the three phases in each regulating segment, and the compensation results of the regulating segments are recorded to ensure the consistency of the three-phase compensation process.

[0066] The system continuously monitors the changes in the compensation demand value for each phase, obtains the demand change value, analyzes its change status, compares the demand change with the preset change threshold, and triggers the adjustment section update analysis command based on the comparison result or change analysis judgment result.

[0067] If the change in demand exceeds the preset threshold, the change in compensation demand is re-decomposed based on the remaining adjustment segment to obtain the updated remaining adjustment segment. Then, in the same batch as other single phases, the single phases with change in demand are adjusted according to the updated adjustment segment until the three-phase compensation demand values ​​are synchronously adjusted, and finally the three-phase compensation adjustment data is obtained.

[0068] The above technical solution can solve the problem that the existing technology is not synchronized enough when compensating each phase, resulting in large errors during the compensation process. For example, if phase A is compensated too early and phases B and C are compensated too late, phase A may fluctuate greatly when phases B and C are compensated, making it difficult to achieve balance after just being about to reach it.

[0069] By setting multiple adjustment sections, synchronous adjustment of three-phase compensation is achieved, avoiding large errors caused by asynchronous adjustment that affect the compensation effect.

[0070] By decomposing the compensation amount into multiple adjustment segments and dynamically updating the adjustment segments according to changes in actual demand, the actual changes in the three-phase load can be matched more accurately, thus improving the accuracy of compensation.

[0071] By adopting synchronous compensation and updating the adjustment section according to changes, the three-phase compensation process is kept synchronous, avoiding three-phase imbalance caused by one phase completing compensation too early or too late.

[0072] Real-time monitoring of demand changes and comparison with preset thresholds enables timely responses to dynamic load changes, allowing compensation strategies to be adjusted quickly.

[0073] In one embodiment of the present invention, S2 includes:

[0074] During the unbalanced adjustment process, each two adjacent adjustment segments are considered as an adjustment node. Coupled data acquisition is performed to obtain the coupled influence data of the adjustment node.

[0075] The coupling adjustment compensation amount is determined based on the coupling effect data; the coupling effect data includes voltage data and current data, etc.

[0076] After obtaining the compensation result of the first adjustment segment based on the coupling adjustment compensation amount, the compensation demand value of the next adjustment segment is compensated to obtain the coupling compensation demand value.

[0077] Based on the coupling compensation requirement value of each control segment, sequential compensation adjustment is performed on each control segment to obtain coupling compensation adjustment information.

[0078] This scheme mainly involves dividing the adjustment range into adjustment amounts. It can be used in step S1.

[0079] The working principle and technical effect of the above technical solution are as follows: an adjustment node is set between every two adjacent adjustment sections, and data on the combined coupling effect, such as the impact of changes in voltage and current on the original compensation amount, are obtained at the node, that is, the change data of the compensation demand after this adjustment.

[0080] The collected coupling effect data is analyzed and processed to determine the coupling adjustment compensation amount through the change data. This compensation amount is used to correct the compensation amount requirement value of the subsequent adjustment section.

[0081] The formula for calculating the coupling adjustment compensation amount is:

[0082]

[0083] Wherein, OB is the coupling adjustment compensation amount, XB is the total compensation requirement of this phase, Δb is the total compensation requirement to be reacquired up to the current adjustment segment, α is the coupling influence correlation coefficient of the adjustment segment corresponding to the coupling adjustment compensation amount, the earlier the adjustment segment is, the larger the coupling influence correlation coefficient is, the first adjustment segment has no coupling influence correlation coefficient, the value range of the coupling influence correlation coefficient is (0-2), and can be determined according to the actual engineering situation, YB is the compensation requirement that has been used up to the current adjustment segment.

[0084] This represents the average compensation requirement for each adjustment segment of this phase. This is a comparison between the average total compensation demand of the remaining control segment and the average total compensation demand of the remaining control segment after coupling effects. When OB is negative, the compensation demand for the next adjustment segment needs to be adjusted downwards based on the original value; conversely, it needs to be adjusted upwards. When OB is negative, the adjustment is downwards; when OB is positive, the adjustment is upwards.

[0085] After completing the compensation for the first adjustment segment and obtaining the compensation result, the original compensation demand value for the next adjustment segment is compensated according to the determined coupled adjustment compensation amount to obtain the coupled compensation demand value.

[0086] In sequence, compensation adjustments are performed according to the coupling compensation demand value of each adjustment segment. Relevant data are recorded during the adjustment process to obtain coupling compensation adjustment information, including the compensation amount and compensation time of each adjustment segment.

[0087] Considering the coupling effect between adjacent adjustment sections during three-phase compensation, coupling data is collected and the coupling adjustment compensation amount is determined. The compensation requirement value for the next adjustment section is then corrected, making the compensation process more accurate and reducing compensation errors caused by coupling. Through coupling compensation adjustment, it is possible to better adapt to complex changes in three-phase loads and reduce compensation deviations caused by coupling. Sequential compensation adjustment of each adjustment section based on the coupling compensation requirement value makes the entire compensation process more closely resemble actual operating conditions, effectively improving the three-phase balance compensation effect and reducing three-phase imbalance.

[0088] In one embodiment of the present invention, S3 includes:

[0089] A rectangular coordinate system is established with time as the horizontal axis and three-phase load power data as the vertical axis to obtain a preset three-phase balance diagram.

[0090] Obtain the initial three-phase load power data of the user's electrical equipment and mark the starting point of the three-phase load power in the preset three-phase balance diagram;

[0091] Obtain updated three-phase load power data of the user's electrical equipment and mark the final point of the three-phase load power in the preset three-phase balance diagram;

[0092] The reactive power (actual adjustment data) after compensation adjustment is obtained by combining the three-phase compensation adjustment data with the coupling compensation demand value;

[0093] Connect the starting point and the ending point of the three-phase load power based on the compensated and adjusted reactive power to obtain the power adjustment curve for each phase of the three phases; the power adjustment data is reactive power adjustment data;

[0094] A reactive power standard line is obtained by drawing a straight line parallel to the x-axis within a preset range based on the average three-phase load power in a preset three-phase balance diagram; the upper limit of the range is the allowable upward range of the average three-phase load power, and the lower limit of the range is the allowable downward range of the average three-phase load power.

[0095] Obtain the intersection point of the power regulation curve of each phase in the three phases within the reactive power standard line to obtain the three-phase balance point, and then obtain the three-phase balance regulation diagram.

[0096] The working principle and technical effect of the above technical solution are as follows: a rectangular coordinate system is constructed using time and three-phase load power data to form a preset three-phase balance diagram.

[0097] Acquire initial and updated three-phase load power data, mark the starting and ending points on the preset three-phase balance diagram, and intuitively present the state of the three-phase load power at different times.

[0098] By combining the three-phase compensation and adjustment data with the coupled compensation demand value, the reactive power after compensation and adjustment is calculated.

[0099] Based on the reactive power after compensation and adjustment, the starting point and the ending point are connected to obtain the power adjustment curve of each phase, which clearly shows the adjustment process of the three-phase load power.

[0100] Based on the average power of the three-phase load and its allowable upper and lower limits, a reactive power standard line is drawn on the preset three-phase balance diagram to provide a quantitative standard for judging the balance of the three-phase load.

[0101] Obtain the intersection point of each phase power regulation curve and the reactive power standard line, determine the three-phase balance point, and generate a three-phase balance regulation diagram to intuitively present the result of three-phase load balance regulation.

[0102] By pre-setting the three-phase balance diagram and power regulation curve, the change of three-phase load power over time can be monitored intuitively, and the problem of three-phase load imbalance can be detected in a timely manner.

[0103] Reactive power can be calculated based on compensation adjustment data and coupled compensation demand values ​​to achieve precise adjustment of reactive power, thereby improving the power factor of the power system and reducing line losses.

[0104] Setting a reactive power standard line provides a clear target range for three-phase load balancing regulation. By obtaining the three-phase balance point and generating a three-phase balance regulation diagram, the effectiveness of three-phase load balancing regulation can be accurately evaluated.

[0105] According to one embodiment of the present invention, the system includes:

[0106] The adjustment and compensation module is used to acquire three-phase imbalance information of the power equipment at the user end, obtain the three-phase demand compensation value, set multiple adjustment sections according to the demand compensation value, perform synchronous compensation of the three-phase adjustment sections, update and decompose the adjustment sections according to the demand change value of the compensation amount, and obtain the updated and decomposed three-phase compensation adjustment data.

[0107] The compensation update module is used to set the adjustment node according to the adjustment segment information, obtain the coupling effect data of the adjustment segment, determine the coupling adjustment compensation amount according to the coupling effect data, perform the demand value compensation of the compensation amount requirement value of the next adjustment segment, and obtain the coupling compensation adjustment information.

[0108] The visualization module is used to fill and update the preset three-phase balance diagram based on the three-phase compensation adjustment data and coupled compensation adjustment information to obtain the three-phase balance point.

[0109] The working principle and technical effect of the above technical solution are as follows: By installing measuring devices such as power analyzers, current transformers, and voltage transformers on the three-phase lines of the user-end power equipment, parameters such as voltage, current, and power factor of the three phases are collected. The imbalance of the three-phase load is analyzed using these parameters to obtain the required compensation value for each phase. The magnitude and direction of the required compensation value depend on the reactive power status of each phase. For example, if a phase exhibits inductive load characteristics (current lags behind voltage), reactive power compensation is required; if it exhibits capacitive load characteristics (current leads voltage), reactive power absorption is required.

[0110] Based on the obtained compensation demand value for each phase, it is decomposed into multiple adjustment segments. The division of adjustment segments can be determined according to actual demand and the characteristics of the compensation equipment, and is not limited here. Within each adjustment segment, a synchronous control strategy is adopted to compensate the three phases synchronously. This can be achieved through a reactive power compensation controller, which controls the switching or adjustment of compensation equipment (such as capacitor banks, reactors, etc.) according to preset adjustment segment parameters to achieve reactive power compensation for the three phases.

[0111] During the compensation process, the change in the compensation demand for each phase is monitored in real time. This can be achieved by continuously collecting three-phase power data and comparing it with the data from the previous moment. When the change in demand exceeds a preset threshold, it indicates a significant change in the load conditions, requiring an update and decomposition of the adjustment segment. Based on the magnitude and direction of the change in demand, the compensation amount of the remaining adjustment segment is redistributed to ensure that the compensation process can adapt to load changes in a timely manner, keeping the three-phase compensation effective at all times.

[0112] A regulating node is established between every two adjacent regulating sections. At each regulating node, voltage, current, and other coupling effect data are collected. These data reflect the interaction and influence between the three phases during the compensation process. By analyzing the coupling effect data, the coupling regulation compensation amount is determined, which is used to correct the compensation requirement value of the next regulating section, achieving more accurate compensation.

[0113] Analyze the coupling effect data to determine the coupling adjustment compensation amount. At the beginning of the next adjustment segment, obtain the updated compensation requirement value, i.e., the coupling compensation requirement value. Perform compensation adjustment for the next adjustment segment based on the coupling compensation requirement value, and record the coupling compensation adjustment information.

[0114] A preset three-phase balance diagram is established with time on the x-axis and three-phase load power data on the y-axis. The acquired three-phase compensation and adjustment data and coupled compensation and adjustment information are then filled into the preset three-phase balance diagram in chronological order. The three-phase balance diagram, with time on the x-axis and three-phase load power data on the y-axis, forms a three-phase power adjustment curve by connecting the power points before and after compensation in each adjustment segment.

[0115] A preset three-phase balance diagram is established with time on the x-axis and three-phase load power data on the y-axis. Based on the acquired three-phase compensation and adjustment data, the power points before and after compensation are marked on the balance diagram and connected to form a curve. Simultaneously, the curve is corrected and improved based on the coupled compensation and adjustment information. In the balance diagram, a straight line parallel to the x-axis is drawn based on the average three-phase load power as the reactive power standard line, with its allowable upper and lower ranges set according to actual operating requirements. When the three-phase power adjustment curves simultaneously intersect the reactive power standard line (both within the acceptable range), a three-phase balance state is achieved, and the intersection point obtained at this time is the three-phase balance point.

[0116] By decomposing the demand compensation value into multiple adjustment segments and performing synchronous compensation, the compensation process can be controlled more precisely, reducing three-phase imbalance caused by insufficient or excessive compensation.

[0117] By setting multiple adjustment sections and a synchronous compensation mechanism, the compensation amount of each phase can be controlled more precisely, reducing three-phase imbalance caused by insufficient or excessive compensation. Simultaneously, considering the coupling effects between the three phases, coupling compensation further improves the accuracy of the compensation.

[0118] Precise three-phase imbalance compensation reduces line losses and equipment failures caused by three-phase imbalance, lowers maintenance costs, and improves maintenance efficiency.

[0119] Precise three-phase imbalance compensation improves the power quality of the power system and reduces problems such as voltage fluctuations and current harmonics.

[0120] In one embodiment of the present invention, the adjustment compensation module includes:

[0121] The factor determination module is used to obtain the initial three-phase load power data of the power equipment at the user end, obtain the phase difference between the current and voltage of each phase of the power equipment based on the initial three-phase load power data, determine the imbalance factor of each phase of the power equipment based on the phase difference, and obtain the imbalance factor determination result of each phase of the power equipment.

[0122] The imbalance factors include inductive loads and capacitive loads. For example, if the three phases are phase A, phase B, and phase C, and the phase difference of phase A is positive, it means that the load of phase A is inductive (current lags behind voltage), and the inductive load absorbs reactive power. If the phase difference of phases B and C is negative, it means that phases B and C are capacitive (current leads voltage), and the capacitive load generates reactive power.

[0123] The difference acquisition module is used to calculate the average three-phase load power based on the three-phase load power data, and to calculate the load power difference of each phase based on the average three-phase load power and the three-phase load power data; for example, the difference between the load power data of phase A and the average three-phase load power is the load power difference of phase A.

[0124] The compensation acquisition module is used to obtain the required compensation value of each phase in the three phases based on the load power difference of each phase and the corresponding imbalance factor judgment result, and to adjust the imbalance of each phase according to the required compensation value; that is, to compensate or absorb reactive power.

[0125] The compensation segmentation module is used to decompose and update the adjustment segment by demand compensation value during the imbalance adjustment process of each phase. Based on the adjustment segment, the three phases of the equipment are segmented for compensation to obtain segmented compensation data until the three-phase compensation is completed. The module obtains the three-phase compensation adjustment data and the updated three-phase load power data after the three-phase compensation adjustment, and determines the three-phase imbalance to obtain the adjustment status information.

[0126] Each phase represents one of phases A, B, and C;

[0127] Example of adjustment:

[0128] A capacitor is connected in parallel with phase A, and inductors are connected in parallel with phases B and C to balance the power. Assuming that the desired power factor of all three phases is 1 after compensation (i.e., reactive power is fully compensated), the reactive power QCA to be compensated for phase A can be calculated using the power triangle. Assuming that the power factor of phase A before compensation is 0.8 (lagging), then QCA = PAtan(arccos0.8 - arccos1) = 5 × tan(36.87° - 0°) ≈ 3.75 kvar (this is just a simple example).

[0129] Calculate the capacitance value: C = 2πfU21QCA = 2π × 50 × 22021 × 3750 ≈ 247μF.

[0130] Calculate the inductance value: Assuming the power factor of phase B before compensation is 0.6 (lagging), the reactive power to be compensated is QLB=PBtan(arccos0.6-arccos1)=3×tan(53.13°-0°)≈4kvar;

[0131] L=2πfQLBU2=2π×50×40002202≈3.82mH.

[0132] A 247μF capacitor is connected in parallel to phase A, and a 3.82mH inductor is connected in parallel to phase B. Then, the three-phase current and neutral current are measured to obtain the three-phase imbalance and determine the regulation status (whether it has reached an acceptable balance range).

[0133] The working principle and technical effect of the above technical solution are as follows: the initial three-phase load power data of the user-end power equipment is obtained by measuring equipment, the phase difference between the current and voltage of each phase is calculated, and the positive or negative phase difference is used to determine whether each phase load is inductive (absorbing reactive power) or capacitive (generating reactive power), thus obtaining the unbalance factor determination result.

[0134] Calculate the average power of the three-phase load, and then calculate the power difference of each phase load based on the three-phase load power data.

[0135] Based on the load power difference of each phase and the results of the imbalance factor determination, the required compensation value of each phase is determined, and the imbalance adjustment of each phase is carried out accordingly, that is, the compensation or absorption of reactive power.

[0136] During the adjustment process, the demand compensation value is decomposed into multiple adjustment segments, and the three phases are compensated in segments. At the same time, the demand change value is monitored, and the adjustment segments are updated according to the change until the three-phase compensation is completed. The compensation adjustment data and the updated load power data are obtained, and finally the three-phase imbalance is determined to obtain the adjustment status information.

[0137] By accurately identifying the factors causing the three-phase imbalance and calculating the required compensation value, reactive power compensation or absorption can be performed on each phase in a targeted manner, thereby improving the accuracy of the compensation.

[0138] A segmented compensation method is adopted, and the adjustment segment is updated in real time according to changes in demand, making the compensation process more flexible and adaptable to dynamic changes in load.

[0139] By acquiring three-phase compensation and adjustment data, updating three-phase load power data and adjustment status information, the three-phase imbalance adjustment process can be monitored in real time, facilitating timely detection and resolution of problems, and reducing the occurrence of abnormal situations and the expansion of losses.

[0140] In one embodiment of the present invention, the compensation segmentation module includes:

[0141] The regulating section synchronous compensation module is used to obtain the compensation demand value of each phase in the three phases and decompose the compensation demand value of each phase into N regulating sections.

[0142] The formula for calculating N is:

[0143]

[0144] Where N is the number of adjustment sections, tmax is the largest compensation demand among the three phases, and tmin is the smallest allowable compensation flow rate among the three phases; this formula is applicable to three-phase unbalanced systems.

[0145] When tmax-tmin is larger, the compensation gap between the three phases is larger. When the compensation gap is larger, the number of adjustment sections should be larger. Otherwise, if the compensation amplitude of the phase with the largest compensation demand is too large, it will cause compensation instability.

[0146] Synchronous compensation is performed on each regulation segment of the three phases to obtain the compensation results of the regulation segment;

[0147] Obtain the change value of the compensation demand value for each phase, perform change state analysis on the change value of the demand, obtain the change analysis judgment result, and trigger the adjustment section update analysis command according to the change analysis judgment result;

[0148] The change in demand is compared with a preset change threshold to obtain the comparison result of the change in demand. When the change in demand is greater than the preset change threshold, the adjustment segment update analysis instruction is triggered.

[0149] The adjustment segment decomposition and update module is used to update and decompose the change value of compensation quantity demand based on the remaining adjustment segment to obtain the updated remaining adjustment segment;

[0150] According to the updated remaining adjustment section, the single phase with demand change value continues to be adjusted in the same batch as other single phases until the compensation demand value of each of the three phases is synchronously adjusted and the three-phase compensation adjustment data is obtained.

[0151] The above technical solution can solve the problem that the existing technology is not synchronized enough when compensating each phase, resulting in large errors during the compensation process. For example, if phase A is compensated too early and phases B and C are compensated too late, phase A may fluctuate greatly when phases B and C are compensated, making it difficult to achieve balance after just being about to reach it.

[0152] By setting multiple adjustment sections, synchronous adjustment of three-phase compensation is achieved, avoiding large errors caused by asynchronous adjustment that affect the compensation effect.

[0153] The working principle and technical effect of the above technical solution are as follows: First, obtain the compensation demand value of each phase in the three phases, and decompose it into N adjustment sections.

[0154] Compensation operations are performed simultaneously on each of the three phases in each regulating segment, and the compensation results of the regulating segments are recorded to ensure the consistency of the three-phase compensation process.

[0155] The system continuously monitors the changes in the compensation demand value for each phase, obtains the demand change value, analyzes its change status, compares the demand change with the preset change threshold, and triggers the adjustment section update analysis command based on the comparison result or change analysis judgment result.

[0156] If the change in demand exceeds the preset threshold, the change in compensation demand is re-decomposed based on the remaining adjustment segment to obtain the updated remaining adjustment segment. Then, in the same batch as other single phases, the single phases with change in demand are adjusted according to the updated adjustment segment until the three-phase compensation demand values ​​are synchronously adjusted, and finally the three-phase compensation adjustment data is obtained.

[0157] The above technical solution can solve the problem that the existing technology is not synchronized enough when compensating each phase, resulting in large errors during the compensation process. For example, if phase A is compensated too early and phases B and C are compensated too late, phase A may fluctuate greatly when phases B and C are compensated, making it difficult to achieve balance after just being about to reach it.

[0158] By setting multiple adjustment sections, synchronous adjustment of three-phase compensation is achieved, avoiding large errors caused by asynchronous adjustment that affect the compensation effect.

[0159] By decomposing the compensation amount into multiple adjustment segments and dynamically updating the adjustment segments according to changes in actual demand, the actual changes in the three-phase load can be matched more accurately, thus improving the accuracy of compensation.

[0160] By adopting synchronous compensation and updating the adjustment section according to changes, the three-phase compensation process is kept synchronous, avoiding three-phase imbalance caused by one phase completing compensation too early or too late.

[0161] Real-time monitoring of demand changes and comparison with preset thresholds enables timely responses to dynamic load changes, allowing compensation strategies to be adjusted quickly.

[0162] In one embodiment of the present invention, the compensation amount update module includes:

[0163] The coupling analysis module is used to set up a control node between every two adjacent control segments, collect coupling data, and obtain the coupling effect data of the control node.

[0164] The coupling adjustment compensation amount is determined based on the coupling effect data; the coupling effect data includes voltage data and current data, etc.

[0165] The formula for calculating the coupling adjustment compensation amount is:

[0166]

[0167] Wherein, OB is the coupling adjustment compensation amount, XB is the total compensation requirement of this phase, Δb is the total compensation requirement to be reacquired up to the current adjustment segment, α is the coupling influence correlation coefficient of the adjustment segment corresponding to the coupling adjustment compensation amount, the earlier the adjustment segment is, the larger the coupling influence correlation coefficient is, the first adjustment segment has no coupling influence correlation coefficient, the value range of the coupling influence correlation coefficient is (0-2), and can be determined according to the actual engineering situation, YB is the compensation requirement that has been used up to the current adjustment segment.

[0168] This represents the average compensation requirement for each adjustment segment of this phase. This is a comparison between the average total compensation demand of the remaining control segment and the average total compensation demand of the remaining control segment after coupling effects. When OB is negative, the compensation demand for the next adjustment segment needs to be adjusted downwards based on the original value; conversely, it needs to be adjusted upwards. When OB is negative, the adjustment is downwards; when OB is positive, the adjustment is upwards.

[0169] The coupling compensation module is used to compensate the demand value of the compensation amount in the next adjustment segment after obtaining the adjustment segment compensation result in the first adjustment segment based on the coupling adjustment compensation amount, so as to obtain the coupling compensation demand value.

[0170] Based on the coupling compensation requirement value of each control segment, sequential compensation adjustment is performed on each control segment to obtain coupling compensation adjustment information.

[0171] The working principle and technical effect of the above technical solution are as follows: an adjustment node is set between every two adjacent adjustment sections, and data on the combined coupling effect, such as the impact of voltage and current data on the original compensation amount, are obtained at the node, that is, the change data of the compensation demand after this adjustment.

[0172] The collected coupling effect data is analyzed and processed to determine the coupling adjustment compensation amount through the change data. This compensation amount is used to correct the compensation amount requirement value of the subsequent adjustment section.

[0173] After completing the compensation for the first adjustment segment and obtaining the compensation result, the original compensation demand value for the next adjustment segment is compensated according to the determined coupled adjustment compensation amount to obtain the coupled compensation demand value.

[0174] The above formula can be used to obtain the upward or downward compensation adjustment amount after the coupling effect of each adjustment segment. The first adjustment segment has no coupling effect, and the average compensation demand of each adjustment segment in this phase can be used for compensation.

[0175] In sequence, compensation adjustments are performed according to the coupling compensation demand value of each adjustment segment. Relevant data are recorded during the adjustment process to obtain coupling compensation adjustment information, including the compensation amount and compensation time of each adjustment segment.

[0176] Considering the coupling effect between adjacent adjustment sections during three-phase compensation, coupling data is collected and the coupling adjustment compensation amount is determined. The compensation requirement value for the next adjustment section is then corrected, making the compensation process more accurate and reducing compensation errors caused by coupling. Through coupling compensation adjustment, it is possible to better adapt to complex changes in three-phase loads and reduce compensation deviations caused by coupling. Sequential compensation adjustment of each adjustment section based on the coupling compensation requirement value makes the entire compensation process more closely resemble actual operating conditions, effectively improving the three-phase balance compensation effect and reducing three-phase imbalance.

[0177] In one embodiment of the present invention, the visualization module includes:

[0178] The curve acquisition module is used to establish a rectangular coordinate system with time as the horizontal axis and three-phase load power data as the vertical axis to obtain a preset three-phase balance diagram.

[0179] Obtain the initial three-phase load power data of the user's electrical equipment and mark the starting point of the three-phase load power in the preset three-phase balance diagram;

[0180] Obtain updated three-phase load power data of the user's electrical equipment and mark the final point of the three-phase load power in the preset three-phase balance diagram;

[0181] The reactive power after compensation and adjustment is obtained by combining the three-phase compensation and adjustment data with the coupled compensation demand value.

[0182] Connect the starting point and the ending point of the three-phase load power based on the compensated and adjusted reactive power to obtain the power adjustment curve for each phase of the three phases; the power adjustment data is reactive power adjustment data;

[0183] The balance point acquisition module is used to draw a straight line parallel to the x-axis within a preset range on a preset three-phase balance diagram based on the average three-phase load power to obtain a reactive power standard line; the upper limit of the range is the upward allowable range of the average three-phase load power, and the lower limit of the range is the downward allowable range of the average three-phase load power.

[0184] Obtain the intersection point of the power regulation curve of each phase in the three phases within the reactive power standard line to obtain the three-phase balance point, and then obtain the three-phase balance regulation diagram.

[0185] The working principle and technical effect of the above technical solution are as follows: a rectangular coordinate system is constructed using time and three-phase load power data to form a preset three-phase balance diagram.

[0186] Acquire initial and updated three-phase load power data, mark the starting and ending points on the preset three-phase balance diagram, and intuitively present the state of the three-phase load power at different times.

[0187] By combining the three-phase compensation and adjustment data with the coupled compensation demand value, the reactive power after compensation and adjustment is calculated.

[0188] Based on the reactive power after compensation and adjustment, the starting point and the ending point are connected to obtain the power adjustment curve of each phase, which clearly shows the adjustment process of the three-phase load power.

[0189] Based on the average power of the three-phase load and its allowable upper and lower limits, a reactive power standard line is drawn on the preset three-phase balance diagram to provide a quantitative standard for judging the balance of the three-phase load.

[0190] Obtain the three-phase balance point: Obtain the intersection point of the power regulation curve of each phase and the reactive power standard line, determine the three-phase balance point, and generate a three-phase balance regulation diagram to intuitively present the result of the three-phase load balance regulation.

[0191] By pre-setting the three-phase balance diagram and power regulation curve, the change of three-phase load power over time can be monitored intuitively, and the problem of three-phase load imbalance can be detected in a timely manner.

[0192] Reactive power can be calculated based on compensation adjustment data and coupled compensation demand values ​​to achieve precise adjustment of reactive power, thereby improving the power factor of the power system and reducing line losses.

[0193] Setting a reactive power standard line provides a clear target range for three-phase load balancing regulation. By obtaining the three-phase balance point and generating a three-phase balance regulation diagram, the effectiveness of three-phase load balancing regulation can be accurately evaluated.

[0194] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A user-side power equipment balance compensation method based on the Steinmetz balance method, characterized in that, The method includes: S1. Obtain three-phase imbalance information from the user's electrical equipment, obtain the three-phase demand compensation value, set multiple adjustment sections according to the demand compensation value, perform synchronous compensation of the three-phase adjustment sections, update and decompose the adjustment sections according to the demand change value of the compensation amount demand value, and obtain the updated and decomposed three-phase compensation adjustment data. S2. Set the control node according to the control section information, obtain the coupling effect data of the control section, determine the coupling control compensation amount according to the coupling effect data, perform the compensation amount demand value compensation for the next control section, and obtain the coupling compensation control information. S3. Fill and update the preset three-phase balance diagram based on the three-phase compensation adjustment data and coupled compensation adjustment information to obtain the three-phase balance point; Wherein, S2 includes: Assume that each two adjacent adjustment segments are considered as an adjustment node, and perform coupled data acquisition to obtain the coupled influence data of the adjustment nodes; The coupling adjustment compensation amount is determined based on the coupling effect data; the coupling effect data includes voltage data and current data. After obtaining the compensation result of the first adjustment segment based on the coupling adjustment compensation amount, the compensation demand value of the next adjustment segment is compensated to obtain the coupling compensation demand value. Based on the coupling compensation requirement value of each control segment, sequential compensation adjustment is performed on each control segment to obtain coupling compensation adjustment information.

2. The user-side power equipment balance compensation method based on the Steinmetz balance method according to claim 1, characterized in that, S1 includes: The initial three-phase load power data of the power equipment at the user end is obtained. Based on the initial three-phase load power data, the phase difference between the current and voltage of each phase of the power equipment is obtained. Based on the phase difference, the imbalance factor of each phase of the power equipment is determined, and the imbalance factor determination result of each phase of the power equipment is obtained. Calculate the average three-phase load power based on the three-phase load power data, and calculate the power difference of each phase load based on the average three-phase load power and the three-phase load power data. Based on the load power difference of each phase and the corresponding imbalance factor judgment result, the demand compensation value of each phase in the three phases is obtained, and the imbalance of each phase is adjusted according to the demand compensation value. During the imbalance adjustment process of each phase, the adjustment segment is decomposed and updated by demand compensation value. The three phases of the equipment are compensated in segments according to the adjustment segment to obtain segment compensation data until the three-phase compensation is completed. The three-phase compensation adjustment data and the updated three-phase load power data after the three-phase compensation adjustment are obtained. The three-phase imbalance is judged to obtain the adjustment status information.

3. The user-side power equipment balance compensation method based on the Steinmetz balance method according to claim 2, characterized in that, The process of decomposing and updating the adjustment segment through demand compensation value, performing segmented compensation on the three phases of the equipment according to the adjustment segment, obtaining segmented compensation data, until the three-phase compensation is completed includes: Obtain the compensation requirement value for each of the three phases, and decompose the compensation requirement value for each phase into N adjustment segments; Synchronous compensation is performed on each regulation segment of the three phases to obtain the compensation results of the regulation segment; Obtain the change value of the compensation demand for each phase, perform change state analysis on the change value of the demand, obtain the change analysis judgment result, and trigger the adjustment section update analysis command according to the change analysis judgment result; The updated remaining adjustment segment is obtained by updating and decomposing the change value of the compensation demand based on the remaining adjustment segment; According to the updated remaining adjustment section, the single phase with demand change value continues to be adjusted in the same batch as other single phases until the compensation demand value of each of the three phases is synchronously adjusted and the three-phase compensation adjustment data is obtained.

4. The user-side power equipment balance compensation method based on the Steinmetz balance method according to claim 1, characterized in that, S3 includes: A rectangular coordinate system is established with time as the horizontal axis and three-phase load power data as the vertical axis to obtain a preset three-phase balance diagram. Obtain the initial three-phase load power data of the user's electrical equipment and mark the starting point of the three-phase load power in the preset three-phase balance diagram; Obtain updated three-phase load power data of the user's electrical equipment and mark the final point of the three-phase load power in the preset three-phase balance diagram; The reactive power after compensation and adjustment is obtained by combining the three-phase compensation and adjustment data with the coupled compensation demand value. Connect the starting point and the ending point of the three-phase load power based on the compensated and adjusted reactive power to obtain the power adjustment curve of each phase in the three phases; The reactive power standard line is obtained by drawing a straight line parallel to the x-axis within a preset range based on the average three-phase load power in the preset three-phase balance diagram. Obtain the intersection point of the power regulation curve of each phase in the three phases within the reactive power standard line to obtain the three-phase balance point, and then obtain the three-phase balance regulation diagram.

5. A system for implementing the user-end power equipment balance compensation method based on the Steinmetz balance method as described in claim 1, characterized in that, The system includes: The adjustment and compensation module is used to acquire three-phase imbalance information of the power equipment at the user end, obtain the three-phase demand compensation value, set multiple adjustment sections according to the demand compensation value, perform synchronous compensation of the three-phase adjustment sections, update and decompose the adjustment sections according to the demand change value of the compensation amount, and obtain the updated and decomposed three-phase compensation adjustment data. The compensation update module is used to set the adjustment node according to the adjustment segment information, obtain the coupling effect data of the adjustment segment, determine the coupling adjustment compensation amount according to the coupling effect data, perform the demand value compensation of the compensation amount requirement value of the next adjustment segment, and obtain the coupling compensation adjustment information. The visualization module is used to fill and update the preset three-phase balance diagram based on the three-phase compensation adjustment data and coupled compensation adjustment information to obtain the three-phase balance point; The compensation update module includes: The coupling analysis module is used to set each two adjacent control segments as a control node, collect coupling data, and obtain the coupling effect data of the control node. The coupling adjustment compensation amount is determined based on the coupling effect data; the coupling effect data includes voltage data and current data. The coupling compensation module is used to compensate the demand value of the compensation amount in the next adjustment segment after obtaining the adjustment segment compensation result in the first adjustment segment based on the coupling adjustment compensation amount, so as to obtain the coupling compensation demand value. Based on the coupling compensation requirement value of each control segment, sequential compensation adjustment is performed on each control segment to obtain coupling compensation adjustment information.

6. The system of the user-end power equipment balance compensation method based on the Steinmetz balance method according to claim 5, characterized in that, The adjustment and compensation module includes: The factor determination module is used to obtain the initial three-phase load power data of the power equipment at the user end, obtain the phase difference between the current and voltage of each phase of the power equipment based on the initial three-phase load power data, determine the imbalance factor of each phase of the power equipment based on the phase difference, and obtain the imbalance factor determination result of each phase of the power equipment. The difference acquisition module is used to calculate the average three-phase load power based on the three-phase load power data, and to calculate the load power difference of each phase based on the average three-phase load power and the three-phase load power data. The compensation acquisition module is used to obtain the required compensation value for each phase of the three phases based on the load power difference of each phase and the corresponding imbalance factor judgment result, and to adjust the imbalance of each phase according to the required compensation value. The compensation segmentation module is used to decompose and update the adjustment segment by the required compensation value during the imbalance adjustment process of each phase, and to perform segmented compensation on the three phases of the equipment according to the adjustment segment to obtain segmented compensation data until the three-phase compensation is completed. It obtains the three-phase compensation adjustment data and the updated three-phase load power data after the three-phase compensation adjustment, and judges the three-phase imbalance to obtain the adjustment status information.

7. The system of the user-end power equipment balance compensation method based on the Steinmetz balance method according to claim 6, characterized in that, The compensation segmentation module includes: The regulating section synchronous compensation module is used to obtain the compensation demand value of each phase in the three phases and decompose the compensation demand value of each phase into N regulating sections. Synchronous compensation is performed on each regulation segment of the three phases to obtain the compensation results of the regulation segment; Obtain the change value of the compensation demand for each phase, perform change state analysis on the change value of the demand, obtain the change analysis judgment result, and trigger the adjustment section update analysis command according to the change analysis judgment result; The adjustment segment decomposition and update module is used to update and decompose the change value of compensation quantity demand based on the remaining adjustment segment to obtain the updated remaining adjustment segment; According to the updated remaining adjustment section, the single phase with demand change value continues to be adjusted in the same batch as other single phases until the compensation demand value of each of the three phases is synchronously adjusted and the three-phase compensation adjustment data is obtained.

8. The system of the user-end power equipment balance compensation method based on the Steinmetz balance method according to claim 5, characterized in that, The visualization module includes: The curve acquisition module is used to establish a rectangular coordinate system with time as the horizontal axis and three-phase load power data as the vertical axis to obtain a preset three-phase balance diagram. Obtain the initial three-phase load power data of the user's electrical equipment and mark the starting point of the three-phase load power in the preset three-phase balance diagram; Obtain updated three-phase load power data of the user's electrical equipment and mark the final point of the three-phase load power in the preset three-phase balance diagram; The reactive power after compensation and adjustment is obtained by combining the three-phase compensation and adjustment data with the coupled compensation demand value. Connect the starting point and the ending point of the three-phase load power based on the compensated and adjusted reactive power to obtain the power adjustment curve of each phase in the three phases; The balance point acquisition module is used to obtain the reactive power standard line by drawing a straight line parallel to the x-axis within a preset range on a preset three-phase balance diagram based on the average three-phase load power. Obtain the intersection point of the power regulation curve of each phase in the three phases within the reactive power standard line to obtain the three-phase balance point, and then obtain the three-phase balance regulation diagram.

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