SSSC提高系统阻尼特性的控制策略优化设计  

An Optimized SSSC Control Strategy for Improving System Damping Characteristics

作　　者：宋方方 贾秀芳 赵成勇 许建中 赵坚鹏 陆振纲 于弘洋 于建成[3] 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206 [2]先进输电技术国家重点实验室(全球能源互联网研究院),北京市昌平区102200 [3]国家电网天津市电力公司,天津市河北区300010

出　　处：《电网技术》2017年第3期881-887,共7页Power System Technology

基　　金：国家电网公司科技项目(SGRI-DL-71-15-004)~~

摘　　要：分析了含静止同步串联补偿器(static synchronous series compensator,SSSC)电网的次同步振荡数学机理,基于单机无穷大系统推导了考虑SSSC暂态特性的改进系统模型,提出了将调度和本地测量信号作为输入来提高系统阻尼特性的控制策略。利用复转矩分析法的测试原理提出了新型阻尼控制器参数的设计方案,通过合理设计参数可提高系统阻尼及系统稳定性。分析系统的控制目标函数和约束条件,提出了结合遗传算法的参数优化方案,该方法将阻尼控制器参数的协调优化问题转化为阻尼比的最优定值,结合算法得到了提高系统阻尼的控制参数。PSCAD/EMTDC仿真表明,此时系统阻尼值为正,阻尼控制器增大了系统阻尼比,实验结果证明了控制策略对提高系统稳定性的有效性。This paper analyzed mathematical mechanism of sub-synchronous resonance of power grid with static synchronous series compensator（SSSC）. An improved system model considering SSSC transient characteristics based on single machine infinite system was proposed. With dispatch signal and local measurement signal as SSSC input, system damping could be quickly improved. A new type of damping controller was proposed with reasonable parameters. Using GA to choose optimized controller parameters, optimal damping control parameters are obtained directly from algorithm level. PSCAD/EMTDC simulation results show that system damping is positive and damping controller increases damping ratio. Experimental results show effectiveness of the control strategy for improving system stability.

关 键 词：SSSC 阻尼特性 新型阻尼控制器 参数优化 

分 类 号：TM721[电气工程—电力系统及自动化]