比例积分型二级电压控制器的多目标参数优化  

Multi-Objective Parameter Optimization of Proportional-Integral Secondary Voltage Controllers

作　　者：欧阳逸风[1] 刘明波[1] 

机构地区：[1]华南理工大学电力学院,广东省广州市510640

出　　处：《电网技术》2015年第5期1365-1371,共7页Power System Technology

基　　金：国家自然科学基金资助项目(51277078)~~

摘　　要：为通过参数优化提升现有二级电压控制器的控制效果,以先导节点电压偏差平方的积分和发电机无功出力改变量平方的积分最小为目标,基于电力系统准稳态模型,建立了比例积分型二级电压控制器多目标参数动态优化模型。先用隐式梯形法将该模型转化为多目标非线性规划模型,再由规格化法平面约束法将该模型转化为一系列单目标非线性规划模型。借助通用代数建模系统(general algebraic modeling system,GAMS)框架下的CONOPT求解器对其进行求解,从而获得帕累托最优解集。采用模糊隶属度函数方法确定最优折中解实施控制。以新英格兰39节点系统和包含138台发电机、968节点、27个控制分区的某省级电力系统为例,通过与传统PI型二级电压控制器和协调二级电压控制器进行对比分析,证实了所提方法的有效性。Aiming at enhancing the secondary voltage controller＇s performance by parameter optimization, on the basis of quasi-steady-state model of power systems, a multi-objective dynamic optimization model to coordinate the proportional and integral parameters of secondary voltage controllers is established by minimizing two optimization goals such as the integral of voltage deviation at pilot nodes and change of reactive power output of generators. The implicit trapezoidal method is used to transform the optimization model into a multi-objective nonlinear programming model, and then the normalized normal constraint method is applied to transform it into a series of single objective nonlinear programming models, which can be solved by the CONOPT solver in GAMS framework to obtain Pareto optimal solution set. Furthermore, an appropriate optimal solution is selected out by a fuzzy-based membership value assignment method. Taking IEEE 39-bus system and a provincial power system including 968 buses, 138 generators and 27 control areas as simulation examples, the effectiveness of the optimized PI type secondary voltage controller is verified through comparative analysis with traditional PI type secondary voltage controller and coordinated secondary voltage controller.

关 键 词：二级电压控制器 比例积分 参数优化 多目标动态优化 规格化法平面约束法 

分 类 号：TM714.2[电气工程—电力系统及自动化]