New detecting method of harmonics and reactive currents in single circuit without phase lock loop

作者：Lü Xiao Qin^*; Zhang Xiu Feng; Zhang Chun Jun

来源：Power System Protection and Control, 2010, 38(6): 45-48.

• Active current
• Cosine signals
• Detecting methods
• Distortion voltage
• Phase lock loops
• Reactive currents
• Under voltage
• Use Phase
• Wave forms

A new harmonics and reactive currents detecting method in single circuit is proposed in this paper. This method doesn';t use phase lock loop. Only with constructing fundamental sine and cosine signals under arbitrary initial phase, and through mathematical transformation, it can separate both fundamental voltage and fundamental active current, and finally detect harmonic and reactive comprehensive currents. It has theoretical derivation and simulations under voltages with and without distortion in this paper. Simulations has proved that fundamental active current is transported in system with work of the active filter, and whether waveform of voltage is distortion, the results can not be affected.

• 出版日期2010
• 单位西南交通大学