摘要
针对传统ip-iq检测算法在三相不平衡系统中存在延时、干扰放大、计算量大等不足,本文提出了一种适用于三相不平衡系统的ip-iq改进检测算法。该改进算法通过对AB两相电压进行sin/cos变换,再结合基于负荷突变的改进滑动平均值滤波方法获得与电网基波电压对应的直流分量,通过数学计算求得电压基波同步旋转角ψ1u;然后在PSIM中建立三相不平衡系统仿真模型,在此模型上对该算法进行验证分析,结果显示该改进算法响应速度快,并能够准确检测到基波正序和基波负序分量,适用于在逆变器中的应用。
This paper proposed an improved detection algorithm. Which is based on two-phases voltage sin/cos transform and sliding average filtering, and through the mathematical calculation the synchronous rotation angle ψ is produced. Then an unbalanced three phase model is established in PSIM. Results shows that this method can accurately detect the positive and negative current sequence components.
出处
《电工电能新技术》
CSCD
北大核心
2013年第1期76-79,84,共5页
Advanced Technology of Electrical Engineering and Energy
基金
湖南省工业支撑计划项目(2011GK3125)
