级联H桥STATCOM状态反馈与电压均衡控制  

STATCOM Status Feedback and Voltage Equalization Control of Cascade H-bridge

作　　者：陈飞 徐佳宁 卢欣辰 高明 CHEN Fei;XU Jia-ning;LU Xin-chen;GAO Ming(Yunnan Power Grid Company,Kunming 650041,China;不详)

机构地区：[1]云南电网有限责任公司,云南昆明650041 [2]华南理工大学电力学院,广东广州510640

出　　处：《电力电子技术》2024年第4期43-47,共5页Power Electronics

基　　金：国家重点研发计划(2021YFB240200252);云南电网省级科技项目(YNKJXM20210137)。

摘　　要：具有高动态响应的静态同步补偿器(STATCOM)可以提高风电场系统在故障条件下的稳定性,并缓解风电场系统的电压波动。此处提出一种风电场级联H桥STATCOM状态反馈与电压均衡控制策略,借助状态反馈控制算法对系统整体特征值和特征向量进行赋值,使系统具有快速的动态响应和良好的稳定裕度,引入基于功耗补偿的级联H桥模块单元电压平衡策略,进而实现H桥模块单元的电压平衡和无功功率的均匀分布。最后搭建七电平级联H桥STATCOM验证所提状态反馈与电压均衡控制方案的有效性,实验结果表明所提方案可以实现风电场系统的稳定性和高动态响应,并很好实现H桥模块单元的电压平衡和无功功率均匀分布。The static synchronous compensator(STATCOM)with high dynamic response can improve the stability of wind farm system under fault conditions and alleviate the voltage fluctuation of wind farm system.The STATCOM state feedback and voltage equalization control strategy for cascade H-bridge of wind farm is proposed.The state feedback control algorithm is used to assign the overall eigenvalues and eigenvectors of the system,so that the system has fast dynamic response and good stability margin.A voltage balance strategy for cascade H-bridge module based on power compensation is introduced.Then the voltage balance and reactive power uniform distribution of H-bridge module are realized.Finally,a seven-level cascade H-bridge STATCOM is built to verify the effectiveness of the proposed state feedback and voltage equalization control scheme.The experimental results show that the proposed scheme can achieve stability and high dynamic response of the wind farm system,and well achieve voltage balance and uniform reactive power distribution of H-bridge module units.

关 键 词：风电场 静态同步补偿器 电压均衡控制 

分 类 号：TM614[电气工程—电力系统及自动化]