【作者】 范木宏；

【导师】 成立；

【作者基本信息】 江苏大学 ， 电力电子与电力传动， 2006， 硕士

【摘要】 为了研究有源电力滤波器有效的电流检测方法，本文系统且深入地研究了基于小波分析的改进型i_p、i_q法。论文工作主要从两个方面开展：一方面在传统的瞬时无功谐波电流实时检测方法：p、q运算方式检测方法和i_p、i_q运算方式检测方法的基础上，提出了一种改进滤波器型i_p、i_q检测方法。该方法用简单的积分、延时和增益环节代替传统的低通滤波器，将检测方法的延时减少到1／6个电源周期。仿真结果证明了改进滤波器型i_p、i_q检测方法的正确性。 另一方面，论文讨论了小波分析用于有源电力滤波器电流检测的相关理论及应用原理。文中用到了各种小波基的性质，不仅利用小波变换的电力系统谐波分析方法进行谐波的实时跟踪，而且通过小波变换实现了多种特殊要求的谐波检测；文中还介绍了有源电力滤波器的原理，构思了基于小波分析方法检测谐波的小波滤波器，初步设计了小波滤波器的检测电路。仿真结果表明，小波分析方法跟踪谐波变化趋势的效果非常明显，而这正是有源滤波器检测环节最重要的功能。更多还原

【Abstract】 In order to investigate the effective current detecting methods of APF, this paper discussed an advanced i_p、i_q method and wavelet analysis approach. It covers two aspects: in one hand putting forward an advanced i_p、i_q detecting method on the basis of conventional hybrid control approach, which takes simple integral, time delay circuit and plus in place of conventional lower-pass filter and reduces the delay time to 1/6 power cycle. The simulation results prove the correctness of arithmetic.On the other hand, correlative theory of using wavelet analysis in current detecting and the characters of the various wavelet groups that used in the paper has been introduced. According to wavelet analysis the power system harmonic current has been real-time followed, and multi-demands detection with wavelet has been realized. This paper also introduces the principium of APF, puts forward the framework of the wavelet APF and designs the detect circuit of the wavelet APF primarily. The results indicate the obvious effect of following up the various transform of harmonic circuit, which is the most important function of APE.更多还原