针对双定子无刷双馈发电机,将内外功率绕组及内外控制绕组分别同相串联以保证电磁一致性。基于Lyapunov和Popov稳定性理论,采用反步法和模型参考自适应系统设计一种无速度传感器的反步法直接功率控制策略,利用空间矢量脉宽调制（SVPMW）以固定开关频率驱动控制绕组机侧变流器IGBT,以减小功率绕组功率波动及电流总谐波畸变率。通过12/8极50 kW样机控制系统的特性仿真研究,结果表明：所提控制策略在亚同步~超同步的速度变化范围内,可实现变速恒频发电、最大功率跟踪、无功功率及单位功率因数控制,电流总谐波畸变率约为2%。
Abstract
For the dual-stator brushless doubly-fed generator （DS-BDFG）, the inner and outer power windings and inner and outer control windings were connected in series with phase to ensure the electromagnetic consistency of inner and outer winding. Based on Lyapunov stability theorem and Popov hyperstability theorem, a novel speed sensorless back-stepping-based direct power control （BS-DPC） strategy was designed by using back-stepping method and model reference adaptive system （MRAS）, and the SVPMW technology was adopted to drive IGBTs of the control winding machine side converter （MSC） with a fixed switching frequency, so as to reduce the power fluctuation and the total harmonic distortion （THD） of power winding. Through the characteristic simulation research of the 12/8 pole 50 kW prototype control system in the sub-synchronous to super-synchronous speed range, the results show that the proposed sensorless BS-DPC strategy for DS-BDFG can well realize variable speed constant frequency （VSCF）, maximum power point tracking （MPPT）, reactive power control （RPC） and unit power factor control （UPFC）, the THD of power winding current is about 2%.
关键词
风电机组 /
双定子无刷双馈发电机 /
直接功率控制 /
反步法 /
最大功率跟踪 /
模型参考自适应系统
Key words
wind turbines /
dual-stator brushless doubly-fed generator /
direct power control /
back-stepping /
maximum power point tracking /
model reference adaptive system
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基金
国家自然科学基金重点项目（51537007）; 辽宁省教育厅面上项目（LJKZ0617）
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