次同步电流双通道附加阻尼抑制次同步振荡策略及阻抗模型分析
摘要:针对弱电网下直驱风电机组引起的次同步振荡现象，提出一种基于次同步电流双通道附加阻尼策略进行抑制。首先，验证弱电网对次同步振荡的影响；其次，结合直驱风机接入弱电网从系统提取次同步电流分析抑制机理，设计附加阻尼控制器结构及其参数；然后，建立计及频率耦合附加阻尼控制环节的阻抗模型并验证其稳定性；最后，将本文策略与无阻尼控制和传统单通道阻尼控制进行仿真对比。结果表明，相较于无阻尼控制和单通道阻尼控制，本文方法在减小次同步振荡波动范围的同时，更加有效地抑制次同步振荡现象并且具有较好的适应性。
Abstract：Aiming at the phenomenon of subsynchronous oscillation (SSO) caused by direct drive wind turbines under weak power grid, a dual-channel additional damping strategy based on subsynchronous current is proposed for suppression. Firstly, the influence of weak power grid on SSO is verified, and secondly, combined with the direct drive fan connected to the weak power grid to extract subsynchronous current from the system to analyze the suppression mechanism, the structure of additional damping controller and its parameters are designed. Then, an impedance model considering the frequency coupling additional damping control link is established and its stability is verified. Finally, the proposed strategy is simulated and compared with undamped control and traditional single-channel damped control. The results show that compared with undamping control and single-channel damping control, the proposed method reduces the SSO fluctuation range, suppresses SSO phenomenon more effectively and has better adaptability.
标题：次同步电流双通道附加阻尼抑制次同步振荡策略及阻抗模型分析
title:Subsynchronous Current Dual Channel Additional Damping Suppression Subsynchronous Oscillation Strategy and Impedance Model Analysis
作者：李博浩,郭昆丽,吕家君,蔡维正,白阳,任蓓蕾,朱婷华
authors:LI Bohao,GUO Kunli,LYU Jiajun,CAI Weizheng,BAI Yang,REN Beilei,ZHU Tinghua
关键词：弱电网,直驱风电机组,次同步振荡,附加阻尼抑制,
keywords:weak grids,direct drive wind turbines,subsynchronous oscillation,additional damping control,
发表日期：2024-01-15
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