CAJ | 학술논문

风轮大转动惯量导致最优转矩最大功率点追踪(maximum power point tracking，MPPT)控制方法暂态时间过长，效率降低。通过研究风力发电系统(wind turbine generator system，WTGS)工作机理，对问题及原因作具体分析，并设计基于梯度估计的最优转矩补偿器，对电磁转矩给定值进行补偿，以减小大转动惯量对风轮转速变化的影响。通过建立兆瓦级双馈 WTGS 小信号模型及系统闭环传递函数，分析系统闭环极点、阶跃响应曲线及频率特性。小信号模型分析及仿真结果表明，改进后的方法具有良好的系统稳定性及动态特性，暂态过程时间小，兼有经典最优转矩法稳定性和叶尖速比法快速性等部分优点，风能转化率较高。
풍륜대전동관량도치최우전구최대공솔점추종(maximum power point tracking，MPPT)공제방법잠태시간과장，효솔강저。통과연구풍력발전계통(wind turbine generator system，WTGS)공작궤리，대문제급원인작구체분석，병설계기우제도고계적최우전구보상기，대전자전구급정치진행보상，이감소대전동관량대풍륜전속변화적영향。통과건립조와급쌍궤 WTGS 소신호모형급계통폐배전체함수，분석계통폐배겁점、계약향응곡선급빈솔특성。소신호모형분석급방진결과표명，개진후적방법구유량호적계통은정성급동태특성，잠태과정시간소，겸유경전최우전구법은정성화협첨속비법쾌속성등부분우점，풍능전화솔교고。
The efficiency of the conventional optimum torque maximum power point tracking (MPPT) algorithm is reduced by large rotational inertia, and the transient time of the control system becomes longer. The problem was analyzed by studying the mechanism of wind turbine. A novel optimum torque MPPT optimization algorithm was proposed to reduce the transient process time caused by high rotational inertia. The solution presented here used gradient estimation to compensate electromagnetic torque reference. A small signal model was presented with a doubly-fed induction generator based wind turbine for the performance analysis of closed-loop poles, step response and frequency-domain characteristics. From the analysis and simulation results, the novel algorithm combines stability of conventional method and high response rate of tip-speed ratio method, and has good stability, dynamic behavior and high efficiency.