摘要
谐波检测是有源电力滤波器非常关键的一环,只有准确地检测到谐波才能进行合理补偿。为了克服有源电力滤波器中ip-iq算法补偿效果在电网波动和负载变化时出现下降的不足,提出了一种改进的ip-iq谐波及无功电流检测方法,在寻找某一小频率范围内的最优滤波器的基础上,根据电网和负载变化以及模糊隶属函数进行实时投切。该算法提高了补偿后的稳态响应。改进后的算法在工程应用中具有很强的帮助作用。通过simulink仿真证明方法的有效性。
The harmonic detection is crucial to the active power filter because its accuracy is the prerequisite for correct compensation.To avoid the instable ip-iq harmonic detection in the active power filter caused by fluctuating power grid and load,the paper proposes an improved detection method of ip-iq harmonic and reactive currents in which real-time switching is implemented according to the variation in power grid and load as well as the fuzzy membership functions after the optimal filter within a small frequency range is found.With its effectiveness proved by simulation of simulink,the method improves the steady-state response after the harmonic compensation and will be of enormous value in engineering application.
出处
《梧州学院学报》
2012年第1期52-58,共7页
Journal of Wuzhou University
基金
广西科学研究与技术开发计划项目(桂科攻10123010-13)
广西教育厅科研项目(桂教科研200911MS231)
