摘要：In order to improve the thrust-power ratio index of the linear induction motor（LIM）, a novel adaptive genetic algorithm （NAGA） is proposed for the design optimization of the LIM. A good-point set theory that helps to produce a uniform initial population is used to enhance the optimization efficiency of the genetic algorithm. The crossover and mutation probabilities are improved by using the function of sigmoid and they can be adjusted nonlinearly between average fitness and maximal fitness with individual fitness. Based on the analyses of different structures between the LIM and the rotary induction motor （RIM） and referring to the analysis method of the RIM, the steady-state characteristics of the LIM that considers the end effects of the LIM is calculated and the optimal design model of the thrust-power ratio index is also presented. Through the comparison between the optimal scheme and the old scheme, the thrust-power ratio index of the LIM is obviously increased and the validity of the NAGA is proved.

摘要：传统基于永磁直线发电机(PMLG)的直驱风力发电装置随风速波动会导致发电机输出功率的大范围频繁波动,对电网电能质量造成不良影响,并大大降低了电力电子功率转换装置的利用率。此处提出一种基于超级电容储能的功率波动平抑策略,通过在直驱风力发电并网的直流母线上并联由超级电容和双向DC/DC变换器组成的储能单元,设计了带储能单元的PMLG直驱风力发电并网系统各部分协调控制策略,实现了电机侧变流器最大风力能跟踪、电网侧变流器单位功率因数并网和超级电容单元对直驱风力发电并网功率波动的平抑,最后通过构建基于RTDS的硬件在环实验平台,验证了协调控制策略的正确性。