In order to solve the problem of excessive damage to doubly fed induction generator (DFIG) system under the condition of unbalanced voltage, this paper presents an improved coordinated control strategy based on doubly-fed induction generator (DFIG) wind power system, which can solve these problems well. The innovation of this paper is that the parallel grid-side converter (PGSC) uses a passivity-based controller (PBC) based on the Port Control Hamiltonian Dissipation (PCHD) model. Not only can four different control goals be achieved, namely, constant voltage of DC bus voltage, grid-side active power without second harmonics, grid-side reactive power without second harmonics, and grid-side current without negative sequence component, but also to ensure that the balance of stator and rotor current without distortion, the DFIG output power and electromagnetic torque without pulsation. The proposed coordinated control strategy has the characteristics of not changing the control strategy of the rotor-side converter and avoiding complex high-order matrix. The experimental results on the software platform and the hardware platform show that the proposed coordinated control strategy has the advantages of fast response, strong anti-interference ability, high stability, less control parameters.

中文翻译：

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基于串联网侧变流器和无源控制器的双馈风力发电系统在电网电压不平衡条件下的协调控制

为解决电压不平衡条件下双馈感应发电机(DFIG)系统损坏过大的问题，提出一种基于双馈感应发电机(DFIG)风电系统的改进协调控制策略，可解决这些问题很好。本文的创新之处在于并联网侧变流器（PGSC）采用了基于端口控制哈密顿耗散（PCHD）模型的无源控制器（PBC）。不仅可以实现直流母线电压恒压、无二次谐波的网侧有功功率、无二次谐波的网侧无功功率和无负序分量的网侧电流四种不同的控制目标，而且保证定转子电流平衡不失真，双馈电机输出功率和电磁转矩无脉动。所提出的协调控制策略具有不改变转子侧变流器控制策略和避免复杂高阶矩阵的特点。在软件平台和硬件平台上的实验结果表明，所提出的协调控制策略具有响应速度快、抗干扰能力强、稳定性高、控制参数少等优点。