摘要
基于p-q-r空间坐标变换的基本思想,采用三相对称单位正弦电压替代电网畸变电压,由此构建出改进的正序分量矩阵,对p-q-r法在电网不平衡及畸变时的检测原理进行了改进。结合改进的p-q-r谐波检测法,采用3D-SVPWM调制方法,对电容中点式APF进行了建模及仿真,详细论述了3D-SVPWM策略中零矢量方向的判断方法。以DSP2812为控制器搭建了实验平台,验证了该系统的正确性。
Based on the basic idea of spatial transformation of p-q-r,this paper uses 3D-SVPWM modulation to model and simulate the midpoint capacitor-type APF.Detailed description of the zero-vector direction determine method of the 3DSVPWM strategy and the detection principle of using the improved p-q-r method to detect the unbalance and distortion of the power grid.The controller DSP2812 is used to build an experimental platform to verify the correctness of the system.
出处
《电测与仪表》
北大核心
2010年第11期17-21,41,共6页
Electrical Measurement & Instrumentation
