电网不平衡下DFIG网侧变换器侧基于PCHD模型的无源控制  

Research on Passivity-Based Control Based on PCHD Model for DFIG Grid-Side Converter Under Unbalanced Grid Voltage Conditions

作　　者：程启明[1] 谭冯忍 程尹曼[2] 杨小龙[1] 黄山[1] 

机构地区：[1]上海电力学院自动化工程学院,上海市杨浦区200090 [2]同济大学电子与信息工程学院,上海市嘉定区201804

出　　处：《电网技术》2017年第5期1627-1635,共9页Power System Technology

基　　金：国家自然科学基金(61573239);上海市重点科技攻关计划(14110500700)~~

摘　　要：电网电压不平衡对双馈异步风力发电机(doubly fed induction generator,DFIG)系统的运行损害很大,传统的控制方法不能完全解决该问题。根据电压不平衡情况下DFIG的工作原理,提出了DFIG网侧变换器控制器基于端口受控的耗散哈密顿(port controlled Hamiltonian with dissipation,PCHD)模型的互联和阻尼分配无源性控制(interconnection and damping assignment passivity-based control,IDA-PBC)方法,详细推导出在正序和负序下基于PCHD模型的DFIG网侧变换器IDA-PBC控制器结构,并计算出在消除电压不平衡引起的网侧输出有功2次谐波、网侧输出无功2次谐波及网侧电流2次谐波3种不同控制目标下网侧电流的给定值,还结合机侧控制策略给出了网侧和机侧之间协调控制最优控制目标组合方式。软件仿真和硬件实验结果表明了所提出的控制方案的可行性和有效性。Grid voltage unbalance brings great damage to doubly-fed induction wind generator（DFIG） and traditional control methods cannot completely solve this problem. According DFIG operation principle under unbalanced voltage, based on interconnection and damping assignment passivitybased control（IDA-PBC）, port controlled Hamiltonian-withdissipation（PCHD） model for grid-side converter controller design is proposed in this paper. Positive and negative sequence grid-side converter IDA-PBC controller based on PCHD is deduced. Grid-side current values in three control targets are calculated to eliminate the second harmonics in grid-side current, output power and output reactive power. Optimal coordinated control targets of grid-side and rotor-side are given in combination of rotor-side control strategy. Simulation and experiment results show feasibility and effectiveness of the proposed control scheme.

关 键 词：不平衡电网电压 双馈风力发电系统 网侧变换器 端口受控的耗散哈密顿 无源性控制 

分 类 号：TM76[电气工程—电力系统及自动化]