基于多指标非线性控制方法的微网逆变器控制设计  

Control strategy design based on multi-index nonlinear control method for microgrid inverter

作　　者：李啸骢[1] 任子熠 袁辉[2] 陈明媛[2] 罗宏亮[2] 李春涛[2] 

机构地区：[1]广西大学广西电力系统最优化与节能技术重点实验室,广西南宁530004 [2]广西大学电气工程学院,广西南宁530004

出　　处：《电力自动化设备》2017年第9期18-23,共6页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51267001);广西科学研究与技术开发计划项目(14122006-29);广西自然科学基金资助项目(2014GXNSFAA118338);南宁市科学研究与技术开发计划项目(20165186)~~

摘　　要：为了提高微网逆变器的动静态性能,对于多输入多输出的逆变器非线性系统,引入多指标非线性控制方法进行微网逆变器控制设计。根据微网逆变器双环控制的要求,选取微源输出电压及其微分量的线性组合为输出函数,从理论上证明满足状态反馈部分精确线性化的能控性条件和对合条件,推导出多指标非线性控制律。该控制律能实现在统一的非线性控制设计框架下对微源输出电压及其微分量进行同时约束,消除微源输出电压的稳态误差,加快逆变器的响应速度,使系统的动静态性能得到很好的协调,实现逆变器的高性能控制。相比于传统的双环控制,该设计方法能够使控制量解耦;充分考虑了系统的非线性,保证了在大信号扰动下系统具有良好的性能;实现了统一的电压、电流环设计,能够满足不同控制策略需求。仿真实验验证了该控制方法的有效性与优越性。MNC（Multi-index Nonlinear Control） is introduced to the control strategy design for the multi-input multi-output nonlinear system of microgrid inverter to improve its dynamic and static performances. According to the requirements of dual-loop control,the linear combination of micro-source＇s output voltage and its differential is chosen as the output function,which is theoretically proved satisfying the conditions of controllability and involution for the partial linearization of state feedback. The multi-index nonlinear control law is deduced,which realizes the simultaneous constraint of micro-source＇s output voltage and its differential under a unitary nonlinear control framework to eliminate its steady-state error and increase the response speed of inverter for the better coordination of system dynamic and static performances and the highperformance control of inverter. Compared with traditional dual-loop control,the proposed approach enables the control variable decoupling,fully considers the system nonlinearity to guarantee the better system performance under large signal perturbation,and realizes the unified design of voltage and current loops for different control strategies. Simulative results demonstrate its effectiveness and superiority.

关 键 词：微网 逆变器 非线性 多指标非线性控制 动静态性能 

分 类 号：TM761[电气工程—电力系统及自动化] TM464