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中文摘要：
为了实现更加精细化的谐波分析和治理，需要对任意次谐波电流的有功分量和无功分量进行精确检测。对传统的同步坐标变换法进行了改进，采用park变换构建了电网电压各次谐波的初相位计算方法，根据该初相位构建扩展广义park变换矩阵对电流进行广义park变换，得到各次谐波电流的有功分量和无功分量。设计了改进的检测电路结构并用Matlab／simulink进行了仿真验证，结果表明，该方法可以精确地提取电流有功分量和无功分量，满足任意次谐波细粒度检测的要求。
英文摘要：
In order to achieve a more refined method for harmonic analysis and governance , it is necessary to accurately detect the active component and reactive component of random harmonic current . The traditional synchronous coordinate transformation method is reformed ：initial phase calculation method for network voltage harmonic is constructed based on park transformation . Expanded and generalized park transformation matrix is constructed according to the initial phase to carry out park transformation for current .Then ,active component and reactive component of random harmonic current are gained . Besides , improved detection circuit structure is designed , and simulation verification is conducted with matlab/simulink .The research data show that active component and reactive component of current can be extracted accurately to meet particle size measurement requirement of random harmonic .
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