大规模电力系统无功优化的一种分解协调算法  

A Decomposition and coordination algorithm for reactive power optimization in large-scale power systems

作　　者：尚文洁[1] 吉兴全[1] 郑耀东[2] 钟晓涛[2] 孙申 文福拴[4] 

机构地区：[1]山东科技大学信息与电气工程学院,山东青岛266510 [2]中国南方电网电力调度控制中心,广东广州510623 [3]青岛华强文化科技公司,山东青岛266510 [4]浙江大学电气工程学院,浙江杭州310027

出　　处：《华北电力大学学报（自然科学版）》2011年第6期17-22,共6页Journal of North China Electric Power University：Natural Science Edition

基　　金：高等学校博士学科点专项科研基金资助项目(200805610020);南方电网公司科技项目

摘　　要：随着电力系统规模的不断增大以及电气设备和负荷种类的不断增多,无功优化问题变得越来越复杂,对大规模电力系统进行在线无功优化和实时控制就更加困难。无功优化和控制的本地性使得分解协调算法很适于解决这一问题。在此背景下,针对电力系统调度具有的按电压等级分层管辖的特点,首先按照电压等级对大规模电力系统进行分区,建立多区域系统的无功优化模型;然后采用非线性原-对偶内点法求解各子区域(子系统)的无功优化问题,最后基于加边对角模型对各个子系统的无功优化过程进行协调,通过不断修正边界节点的等值注入功率逐步逼近最优解。算例结果表明,所提出的算法能够有效减小求解规模,在并行计算条件下可以显著提高计算速度。As the continuous increase of the power system scale,as well as the occurrence of new kinds of electric apparatus and loads,the reactive power optimization problem is becoming more complicated,and as a result,it becomes more difficult to implement on-line reactive power optimization and real-time control for large-scale power systems.The local feature of reactive power optimization and control makes the decomposition and coordination regime a good option for solving the on-line reactive power optimization and control problem of large-scale power systems.Given this background and considering the fact that the power network is typically administrated hierarchically according to the voltage levels,a large-scale power system is first decomposed into several regions（sub-systems）,and a multi-regional reactive power optimization model is developed.Then,the well-developed nonlinear primary-dual interior point method is employed to attain the reactive power optimization solution of each subsystem.Next,the optimization results of these sub-systems are coordinated by the block bordered diagonal frame model.The equivalent injection power levels at the boundary buses of these subsystems are then updated iteratively,and finally the solving procedure approaches to the optimal solution.Test results show that the presented algorithm can reduce the problem scale effectively and speed the calculation procedure significantly if parallel computation is implemented.

关 键 词：无功优化 电力系统分区 分解协调 加边对角模型 

分 类 号：TM711.1[电气工程—电力系统及自动化]