Rogowski线圈电流互感器相差分析与补偿研究

The Analysis and Compensation on Phase Difference of ROCT Current Transformer

描述了Rogowski线圈电子式电流互感器的工作原理;对传感头、积分电路、低通滤波器等环节产生的相差进行了分析,描述了各个环节的等效电路,同时计算了各个环节的相频特性。明确了相位差产生的机理之后对移相电路开展了设计,提出了两种相位补偿方案,并对两种补偿方案的可行性进行了论证。考虑到恒延时、频率特性等方面的要求,确定方案二作为相位补偿方案。通过对Rogowski线圈电子式电流互感器进行大电流的整机测试,验证了该移相算法对工频和其他谐波信号有较好的补偿作用,对基波和谐波的测量精度也满足标准要求。

Describes the working principle of the Rogowski coil electronic current transformers. It analyzes the phase difference generated by the sensor head, the integrator circuit, low-pass filter. It describes the equivalent circuit of them.It proposes two methods of phase compensation.The test verified the second phase-shifting algorithm compensate power frequency and other harmonic signal well. The measurement accuracy fundamental and harmonic meets the standard requirements.