暂态电压稳定薄弱区的厂站稳态无功协调方法  

Coordination Method of Steady-state Reactive Power in Plant and Substation Coordination in Area of Weak Transient Voltage Stability

作　　者：陈波 郭培 谌艳红 舒展 陶翔 刘柳 CHEN Bo;GUO Pei;CHEN Yan-hong;SHU Zhan;TAO Xiang;LIU Liu(Jiangxi Electric Power Scientific Research Institute College,Nanchang 330096,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;State Grid Jiangxi Electric Power Company,Nanchang 330096,China)

机构地区：[1]国网江西电力有限公司电力科学研究院,南昌330096 [2]武汉大学电气与自动化学院,武汉430072 [3]国网江西省电力有限公司,南昌330096

出　　处：《科学技术与工程》2023年第17期7368-7377,共10页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(51977154);江西省电力公司科技项目(5218202008J)。

摘　　要：考虑协调发电机和变电站电容器稳态无功出力占比对系统暂态电压稳定性的影响,以及无功优化和电压稳定的区域调控特点,研究了基于厂站稳态无功协调提高系统暂态电压稳定裕度的预防控制方案决策方法。该方法在利用近邻传播(affinity propagation,AP)聚类算法和综合暂态电压稳定裕度确定稳定裕度薄弱区域的基础上,基于发电机无功调节对薄弱母线电压作用的加权平均灵敏度进行灵敏调节发电机选择。接着以薄弱区并联无功补偿和灵敏发电机无功出力作为控制变量,建立兼顾暂态电压稳定裕度和母线电压额定值偏移的厂站无功协调多目标优化模型,并结合暂态稳定计算,利用多目标优化算法(multi-objective evolutionary algorithm based on decomposition,MOEA/D)和逼近理想解排序法(technique for order preference by similarity to an ideal solution,TOPSIS)求解系统对严重预想故障的多目标稳态无功协调方案。江西电网实际算例的仿真研究验证了该决策方法的有效性。Considering the influence of the coordinated generator and substation capacitor steady-state reactive power output ratio on the system transient voltage stability,as well as the regional regulation characteristics of reactive power optimization and voltage stability,a preventive control method to improve transient voltage stability margin of the system based on power plant and substation steady-state reactive power coordination was studied.Based on the use of affinity propagation(AP)clustering algorithm and comprehensive transient voltage stability margin to determine the weak stability margin area,sensitive adjustment of generator selection was carried out based on the weighted average sensitivity of generator reactive power regulation to the weak bus voltage.Then,using parallel reactive power compensation in weak areas and reactive power output of sensitive generators as control variables,a multi-objective optimization model for plant station reactive power coordination was established,which takes into account transient voltage stability margin and bus voltage rated value deviation.Combined with transient stability calculation,multi-objective evolutionary algorithm based on decomposition(MOEA/D)and technique for order preference by technique for order preference by similarity to an ideal solution(TOPSIS)were used to solve the multi-objective steady-state reactive power coordination scheme of the system for severe expected faults.The effectiveness of this decision-making method has been verified through simulation research on practical examples of Jiangxi power grid.

关 键 词：暂态电压稳定 多目标无功优化 综合暂态电压稳定裕度 综合无功-电压调节灵敏度 TOPSIS 

分 类 号：TM714[电气工程—电力系统及自动化]