The dominant harmonic detecting method is summarized in this paper and a modified technique based on synchronous reference is proposed for accurate harmonic and reactive current detection.
文中总结了当前主流的谐波检测方法，提出了一种用于谐波和无功准确检测的改进同步坐标系法。
It is concluded that the harmonic and reactive current detection behave as just a feed-forward signal in this closed-loop, and it is incapable of improving the compensation accuracy in steady-state.
结果表明谐波及无功检测信号只不过是电容电压闭环系统中的一个前馈补偿信号，其存在不但不能提高反而影响谐波及无功的稳态和动态补偿精度。
Detection of harmonic and reactive current is very crucial to harmonic restraint and reactive compensate.
谐波和无功检测是进行谐波抑制和无功功率补偿的关键技术。
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