摘要
Abstract
In allusion to solve the problem that the traditional phase locked loop of the three phase grid-connected in-verter is low accuracy and speed under the complex power grid conditions.Firstly, double second order generalized integrator frequency-locked-loop(DSOGI-FLL) is presented in this paper, which has the function modules of frequen-cy adaptive filter, fast frequency-locked and phase extraction, and the Bode diagrams are used to analyzed in depth. And then, the basic properties of DSOGI-FLL are tested, including the grid voltage frequency, phase and the positive and negative extraction.Finally, under the harmonic voltage background grid conditions, further simulations are done.The advantages of DSOGI-FLL are verified, in the aspects of fast dynamic response, strong ability of anti har-monic, high precision, small error, et al.关键词
复杂电网工况/三相并网逆变器/双 2 阶广义积分器锁频环Key words
complex power grid conditions/three phase grid connected inverter/DSOGI-FLL分类
信息技术与安全科学
