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CN-122026405-A - Power distribution network voltage regulating and stabilizing method, device and medium based on supply and use matching

CN122026405ACN 122026405 ACN122026405 ACN 122026405ACN-122026405-A

Abstract

The invention relates to the technical field of voltage regulation, in particular to a voltage regulation and stabilization method, a voltage regulation and stabilization device and a medium for a power distribution network based on supply and utilization matching. The method has the advantages that accurate voltage regulation decision is realized by calculating the matching quantization parameters for power supply and power consumption, the switching time and reactive compensation capacity of the capacitor are dynamically adjusted, the voltage control precision is improved, the node voltage deviation coefficient optimizes the compensation capacity selection, the reactive compensation response is more accurate, the overcompensation and undercompensation are reduced, the voltage differential feedback mechanism before and after compensation accelerates the voltage stabilizing process, the system convergence is improved, the steady-state control effect is enhanced, the frequent switching of equipment is reduced as a whole, the switching loss is reduced, and the power supply quality and the operation efficiency are optimized.

Inventors

  • Du youran

Assignees

  • 苏州普雷斯顿智能科技有限公司

Dates

Publication Date
20260512
Application Date
20251021

Claims (10)

  1. 1. The power distribution network voltage regulation and stabilization method based on supply and use matching is characterized by comprising the following steps of: Step 1, obtaining voltage, current, active power, reactive power and load curves of all nodes, detecting load factors and power factors, calculating power supply and consumption ratios, deriving matching degree indexes and obtaining power supply and consumption matching quantization parameters; step 2, calculating node voltage deviation based on the supply matching quantization parameter, selecting rated voltage as a reference, comparing actual measurement voltage difference and analyzing fluctuation influence to obtain a node voltage deviation coefficient; Step 3, according to the node voltage deviation coefficient, calling reactive compensation device operation data, calculating an adjustable capacity interval, analyzing the mapping relation between the interval and the deviation, determining the direction and the amplitude of compensation current, calculating the compensation response quantity under the driving of matching, and generating a reactive compensation response quantity value; Step 4, based on the reactive compensation response value, monitoring a voltage change curve after compensation, extracting a differential interval before and after voltage stabilization, and calculating a fluctuation amplitude rate to obtain a voltage fluctuation amplitude rate after voltage stabilization; and 5, judging whether the voltage is in an allowable range or not according to the voltage fluctuation amplitude ratio after voltage stabilization, outputting a steady-state parameter set if the fluctuation amplitude ratio of each node is smaller than a limit value, and establishing a voltage regulation and voltage stabilization control quantity of the power distribution network based on supply and use matching.
  2. 2. The power distribution network voltage regulation and stabilization method based on supply matching according to claim 1, wherein the supply matching quantization parameters comprise node power factors, active power distribution ratios and load factors, the node voltage deviation coefficients comprise voltage deviation rates, voltage qualification rates and node voltage sensitivity coefficients, and the reactive compensation response values comprise reactive power compensation amounts, compensation current amplitudes and reactive adjustment coefficients.
  3. 3. The power distribution network voltage regulation and stabilization method based on power supply matching according to claim 1, wherein the voltage fluctuation amplitude rate after voltage stabilization comprises a voltage fluctuation rate, a voltage stability coefficient and a node steady-state maintenance rate, and the power distribution network voltage regulation and stabilization control quantity based on power supply matching comprises a voltage regulation threshold value, a reactive power distribution coefficient and a system stability margin.
  4. 4. The power distribution network voltage regulation and stabilization method based on supply matching according to claim 1, wherein the specific steps of the first step are as follows: S101, obtaining power supply voltage, current, active power, reactive power and user load curve data of each node in a power distribution network, performing product operation on node current and voltage values in the same time period to obtain node apparent power values, obtaining power factors of each node according to the ratio of the active power to the apparent power, calculating the node load factors according to the ratio of the average load value to the maximum load value in the node load curve, and finally generating a node operation characteristic coefficient set; S102, based on the node operation characteristic coefficient set, invoking node active power data and power supply output power data corresponding to current and voltage to perform comparison calculation, obtaining a power transmission ratio by using a difference value between power supply side output power and user side absorption power and a power supply side output power ratio, and calculating a difference value between each node power transmission ratio and a power factor by taking a node power factor as a reference to finally obtain a node supply difference coefficient; And S103, according to the node supply difference coefficient, carrying out comprehensive operation on the power transmission ratio and the power factor difference value of each node, calculating the overall supply matching level of the system in a weighted average form of the difference values, and comparing the obtained average value with a set matching reference value to generate a supply matching quantization parameter representing the power cooperation degree of the power supply side and the user side of the power distribution network.
  5. 5. The power distribution network voltage regulation and stabilization method based on supply and use matching according to claim 1, wherein the specific steps of the second step are as follows: S201, acquiring actual measurement voltage values of all nodes of a power distribution network based on the supply and use matching quantization parameters, selecting rated voltage of a system as a voltage reference value, comparing the actual measurement voltage values of all nodes with the reference value, calculating, recording the difference amplitude of each node voltage relative to the reference value, sorting the difference according to time sequence, generating a voltage offset sequence of all nodes in a measurement period, and finally obtaining a node voltage offset set; S202, according to the node voltage offset set, calling the matched quantization parameters of each node for use, taking the numerical interval of the matched quantization parameters as a grouping basis, carrying out partition statistics on the voltage offset, comparing the average value and standard deviation of the node voltage offset in the same interval, calculating a voltage fluctuation amplitude value, and generating a voltage fluctuation amplitude measurement reflecting the voltage response change in the matched state; And S203, calculating the ratio between the voltage fluctuation amplitude and the supply matching difference by combining the supply matching quantization parameter of each node according to the voltage fluctuation amplitude measurement, and carrying out normalization processing on the ratio and the rated voltage reference value to form a quantitative index for representing the influence degree of unbalance of the supply side on the node voltage, thereby finally obtaining the node voltage deviation coefficient.
  6. 6. The power distribution network voltage regulation and stabilization method based on supply and use matching as set forth in claim 1, wherein the specific steps of the third step are as follows: s301, acquiring real-time operation data of each node reactive power compensation device according to the node voltage deviation coefficient, detecting a reactive power adjustment capacity interval of each node reactive power compensation device under the current operation condition, recording the minimum and maximum adjustable reactive power of each device under the operation state, obtaining a reactive power adjustment capacity range which can be provided by each node, and finally generating a reactive power adjustment capacity interval; S302, based on the reactive power adjustment capacity interval and the node voltage deviation coefficient, comparing the mapping relation between the reactive power adjustment capacity interval and the voltage deviation coefficient of each node, judging the requirement of the change of the voltage deviation coefficient on reactive power adjustment capacity, confirming the adjustment direction of the reactive power compensation device, and finally determining the amplitude and the direction of compensation current injection to obtain reactive power adjustment response direction and amplitude; And S303, calculating reactive power compensation response quantity of each node under the drive of power supply matching according to the reactive power adjustment response direction and the amplitude, applying the mapping relation between the reactive power adjustment capacity of the node and the voltage deviation coefficient to reactive power compensation response calculation, generating reactive power compensation response quantity, recording reactive power compensation response values of all nodes, and finally obtaining reactive power compensation response quantity value.
  7. 7. The power distribution network voltage regulation and stabilization method based on supply and use matching as set forth in claim 1, wherein the specific steps of the fourth step are: S401, monitoring voltage change curves of all nodes after compensation according to the reactive compensation response values, recording sampling time sequences and corresponding amplitudes of voltage in a stable period, extracting voltage amplitude sequences before compensation and after compensation, calculating difference values of the two sequences at time synchronization points, establishing a voltage amplitude change set among the nodes, and generating a voltage stabilizing voltage difference partition; S402, based on the voltage stabilizing voltage difference partition, extracting boundary amplitude values of voltage changes before and after voltage stabilization of each node, calculating a ratio between the voltage changing range of each node and the average value of the voltage amplitude values before voltage stabilization, and pairing a ratio sequence with a voltage sampling time sequence to form interval amplitude distribution reflecting voltage dynamics in a voltage stabilizing stage, so as to obtain a voltage fluctuation amplitude distribution rate; S403, quantifying the voltage variation trend of each node in the voltage stabilization stage according to the voltage fluctuation amplitude distribution rate, calculating the average value and the polar difference value of the voltage fluctuation amplitude distribution rates of all nodes, and determining the integral amplitude proportion of the voltage variation after voltage stabilization by taking the node voltage amplitude average value as a reference to generate the voltage fluctuation amplitude rate after voltage stabilization.
  8. 8. The power distribution network voltage regulation and stabilization method based on supply and use matching as set forth in claim 1, wherein the specific steps of the fifth step are as follows: S501, acquiring the fluctuation amplitude rate of each node according to the voltage fluctuation amplitude rate after voltage stabilization, comparing the fluctuation amplitude rate with a rated voltage fluctuation limit value, and judging whether the fluctuation amplitude rate of each node is smaller than the limit value; S502, acquiring steady-state parameter data of each node based on the node fluctuation amplitude rate meeting the voltage stabilizing condition, calculating the comprehensive characteristic value of the data, extracting effective voltage data in the voltage stabilizing process, further determining the reliability of the effective voltage data as a final regulation and control index, and generating a system steady-state regulation and control parameter set; And S503, according to the steady-state regulation parameter set of the system, combining the voltage regulation requirements of the power distribution network with the supply and use matching, establishing a voltage regulation and stability control quantity model based on the supply and use matching, outputting final regulation and stability control quantity parameters, and generating the voltage regulation and stability control quantity of the power distribution network.
  9. 9. Distribution network voltage regulating and stabilizing device based on supply and use matching, characterized in that the device comprises: the electric energy adjusting module is used for optimizing the electric energy quality of the power grid and improving the power supply efficiency and stability by intelligently controlling the operation of the power capacitor; The system monitoring function provides comprehensive power grid operation monitoring, including real-time data, historical records, alarm management, user management and log audit, and ensures stable operation and data safety of the power grid; The equipment management function is used for monitoring and managing the running state of the power capacitor, including equipment state monitoring, maintenance record management, fault diagnosis analysis, running parameter setting and remote control operation, so as to ensure stable running and efficient maintenance of the power capacitor; The data report function is used for generating and viewing operation data reports of the power capacitor, including daily reports, monthly reports, annual reports, fault statistics and maintenance reports, so as to help a user to comprehensively know the operation condition of the power capacitor; The cache version control module supports the rapid creation and release of cache versions, provides performance monitoring, version rollback and examination functions, can define cache level and data consistency requirements, and realizes comprehensive version control and management; the interface standard module supports submitting and deleting data analysis tasks, can inquire the task state and results, carries out deep analysis on multi-source data through an analysis interface and uniquely identifies the tasks by analysis ID; The data encryption module guarantees data safety through an encryption strategy and an authentication mode, supports automatic encryption of new data, control of key access, audit of encryption operation and access record, and records data storage positions and encryption formats; The system coordination module is used for setting a scene to represent and manage intelligent scenes defined by a user, allowing the user to remotely control home equipment through a mobile phone or a computer by remote control, realizing remote control and monitoring, and recording the running state of each intelligent equipment by equipment state representation; Task implementation module, task title represents brief title of task, state update task current state and progress, task allocation allocates task to proper team member, task number represents unique identification code of task, project execution monitoring system is used for tracking and managing each task in project, progress report of task is generated for review; and the garbage cleaning module supports quick and deep scanning, classifies and cleans according to file size, access time and type, provides a safety mode to prevent false deletion, improves the system operation efficiency and supports a self-defined cleaning type.
  10. 10. A computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements the steps of the power distribution network voltage regulation and stabilization method based on supply matching of any one of claims 1 to 8.

Description

Power distribution network voltage regulating and stabilizing method, device and medium based on supply and use matching Technical Field The invention relates to the technical field of voltage regulation, in particular to a power distribution network voltage regulation and stabilization method, device and medium based on supply and use matching. Background The technical field of voltage regulation comprises various methods and devices for monitoring and dynamically adjusting voltage level in real time in a power system. The core content of the technical field relates to stabilizing the voltage of a power grid through switching control of a power capacitor, and improving the power supply quality through monitoring the voltage, current, frequency and other operation parameters of the power grid and combining a power factor correction means. In the operation of a power distribution network, the voltage regulation technology needs to solve the voltage deviation problem caused by load fluctuation, and voltage stability is maintained by means of grouping switching of a capacitor bank, sectional control of voltage class, identification and suppression of harmonic components and the like. The technology also covers the collection and analysis of the real-time data of the power grid, assists fault diagnosis through the storage and retrieval of historical operation data, and realizes the start and stop and parameter adjustment of the power capacitor through remote control operation. The power distribution network voltage regulation and stabilization method based on power supply and utilization matching refers to a technical scheme for realizing voltage regulation by analyzing the power matching relation between a power supply side and a power utilization side. The patent mainly aims at technical matters including suppression of voltage fluctuation in a power distribution network, dynamic correction of power factors and determination of capacitor switching time. The method specifically comprises the steps of collecting parameters such as voltage amplitude and phase angle of each node of a power distribution network, active and reactive components of load current, real-time numerical value of grid frequency and the like, calculating the input capacity and the cut-off capacity of a capacitor according to the balance relation of power supply and power consumption by combining capacity grade and cut-off frequency records of a power capacitor, triggering grouping cut-off actions of the capacitor by comparing deviation amounts of measured voltage values and rated voltage values, and completing voltage regulation and voltage stabilization control by adopting a voltage segmentation threshold value judgment and capacitor grading response mode. In the prior art, static voltage threshold values and sectional switching are relied on in voltage regulation, so that response speed is low, and load fluctuation is difficult to effectively respond. The lack of power supply side and power utilization side power matching quantization makes adjustment inaccurate enough, and overcompensation or undercompensation phenomenon is easily caused, so that power grid fluctuation and loss are increased. The frequent switching of the equipment causes additional switch abrasion and maintenance cost, and the real-time data analysis and diagnosis capability is insufficient, so that response is delayed, and fault location and voltage stability are affected. Meanwhile, the compensation capacity selection is limited by fixed gears and experience rules, so that node requirements are difficult to match accurately, and the power factor and the power supply quality are further affected. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides a power distribution network voltage regulating and stabilizing method, device and medium based on supply and use matching. In order to achieve the purpose, the power distribution network voltage regulating and stabilizing method based on supply and use matching adopts the following technical scheme that the power distribution network voltage regulating and stabilizing method based on supply and use matching comprises the following steps: Step 1, obtaining voltage, current, active power, reactive power and load curves of all nodes, detecting load factors and power factors, calculating power supply and consumption ratios, deriving matching degree indexes and obtaining power supply and consumption matching quantization parameters; step 2, calculating node voltage deviation based on the supply matching quantization parameter, selecting rated voltage as a reference, comparing actual measurement voltage difference and analyzing fluctuation influence to obtain a node voltage deviation coefficient; Step 3, according to the node voltage deviation coefficient, calling reactive compensation device operation data, calculating an adjustable capacity interval, analyzing the mapping relation betwe