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双馈感应发电机应对重复性电网故障的控制策略

Control of Doubly-Fed Induction Generator to Ride-Through Recurring Grid Faults

语言:

中文摘要

随着电网规范对风力发电系统(WTS)提出更高要求,双馈感应发电机(DFIG)需具备应对重复性电网故障的能力。传统转子侧撬棒(Crowbar)保护在单次故障下有效,但在重复故障中可能导致瞬态电流电压过大,引发系统脱网。本文研究了提升DFIG在连续故障工况下穿越能力的新型控制策略。

English Abstract

The wind turbine system (WTS) is required to ride-through recurring grid faults by the new grid codes. Under single grid faults, the fault ride-through (FRT) strategy with rotor-side crowbar is normally used for the doubly-fed induction generator (DFIG) WTS. However, under recurring faults, larger transient current and voltage may be produced, and the DFIG may fail to ride-through the second fault...
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SunView 深度解读

该研究针对风电变流器在复杂电网环境下的稳定性优化,与阳光电源风电变流器产品线高度相关。随着风电场接入弱电网及电网故障频发,提升变流器在连续故障下的穿越能力是保障电站可靠性的关键。建议研发团队借鉴文中关于重复故障下的瞬态抑制策略,优化变流器控制算法,并结合iSolarCloud平台对电网故障进行大数据分析,提升阳光电源风电变流器在极端工况下的并网鲁棒性,以满足日益严苛的全球电网准入标准。