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首页> 外文期刊>Power Electronics, IET >Control of a STATCOM-assisted self-excited induction generator-based WECS feeding non-linear three-phase and single-phase loads
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Control of a STATCOM-assisted self-excited induction generator-based WECS feeding non-linear three-phase and single-phase loads

机译：控制统计辅助的自激式发电机的WECS馈送非线性三相和单相载荷

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摘要

Self-excited induction generator (SEIG)-based wind energy conversion systems (WECS) are very popular for supplying stand-alone loads at remote sites. The SEIG needs adjustable VAR to regulate its terminal voltage and frequency. Usually, a combination of a static compensator (STATCOM) and a fixed capacitor bank is used to meet this VAR demand. Here, a state feedback-based control scheme is proposed to achieve independent control of the STATCOM DC-link voltage and the SEIG terminal voltage. Further, to ensure harmonic-free voltage at the SEIG terminal while supplying non-linear three-phase or single-phase loads, a harmonic compensation technique is also developed. The wind turbine pitch angle control is utilised to regulate the frequency of the SEIG terminal voltage. The combined action of the proposed voltage control and pitch control strategies ensures that the load voltage and frequency are maintained at their respective rated values with very low harmonic distortion irrespective of variation in the wind speed and load demand. The performance of the proposed controllers (in terms of transient load voltage and frequency deviations and load voltage total harmonic distortion), as verified on a laboratory prototype, are found to be superior to that of similar controllers proposed in the literature.
机译：基于自兴的感应发电机（SEIG）的风能转换系统（WECS）非常受欢迎，用于在远程站点提供独立的负载。 SEIG需要调节VAL以调节其端子电压和频率。通常，使用静态补偿器（Statcom）和固定电容器组的组合来满足该VAL需求。这里，提出了一种基于状态反馈的控制方案来实现Statcom DC链路电压和SEIG终端电压的独立控制。此外，为了确保在SEIG终端在提供非线性三相或单相载荷的同时在SEIG终端进行谐波电压，也开发了谐波补偿技术。风力涡轮机桨距角控制用于调节SEIG终端电压的频率。所提出的电压控制和俯仰控制策略的组合作用确保了由于风速和负载需求的变化而与非常低的谐波失真，负载电压和频率保持在它们各自的额定值。如在实验室原型验证的那样，所提出的控制器（根据瞬态负载电压和频率偏差和负载电压总谐波失真）的性能优于文献中提出的类似控制器。

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