中文摘要：

提出一种基于小生境遗传算法的微电网控制策略及优化方法。建立整个微电网的小信号动态模型，分析得到影响微电网运行特性的主要控制参数及其优化取值域，有效提高了优化过程的计算效率。为构建准确的优化目标函数，采用PSCAD／EMTDC搭建微电网平台并进行各种工作模式及模式切换的时域仿真。针对传统遗传算法存在的非全局性收敛、收敛速度慢等问题，采用小生境技术和自适应技术改进的遗传算法优化微电网的运行特性。算例分析结果验证了所提微电网控制策略及优化方法的有效性和鲁棒性。

英文摘要：

A control strategy and optimization method based on the niche genetic algorithm is proposed for microgrid. In order to effectively improve the optimization efficiency,a small-signal dynamic model of whole microgrid is built and the main control parameters,which influence the operating performance of microgird, and their optimum ranges are obtained by analysis. For establishing the accurate objective function of optimization,the mierogrid platform is built based on PSCAD/EMTDC and the time-domain simulation is carried out for different operating modes and corresponding mode switching of microgrid. Aiming at the non- global convergence and slow convergence rate of traditional genetic algorithm,a genetic algorithm improved by niche technique and adaptive technique is adopted to optimize the operating performance of microgrid. The result of example analysis verifies the validity and robustness of the proposed control strategy and optimization method.