电网不平衡下DFIG网侧变换器侧基于PCHD模型的无源控制

发布时间：2018-10-10 17:54

【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。
[Abstract]:The unbalance of power grid voltage is very harmful to the operation of doubly-fed asynchronous wind turbine (doubly fed induction generator,DFIG) system, and the traditional control method can not completely solve the problem. According to the working principle of DFIG under the condition of voltage imbalance, a method of interconnected and damped allocation passive control (interconnection and damping assignment passivity-based control,IDA-PBC based on port controlled dissipative Hamiltonian (port controlled Hamiltonian with dissipation,PCHD model for DFIG grid-side converter controller is proposed. The IDA-PBC controller structure of DFIG grid-side converter based on PCHD model under positive sequence and negative sequence is derived in detail, and the second-order active power harmonic output caused by eliminating voltage imbalance is calculated. The network side output reactive power second harmonic and the network side current 2 harmonics are given under three different control targets. Combined with the machine side control strategy, the optimal control target combination between the network side and the machine side is given. The results of software simulation and hardware experiments show that the proposed control scheme is feasible and effective.
【作者单位】：上海电力学院自动化工程学院;同济大学电子与信息工程学院;
【基金】：国家自然科学基金(61573239) 上海市重点科技攻关计划(14110500700)~~
【分类号】：TM614;TM46

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