摘要
提出了新的无锁相环单相电路谐波及无功电流综合检测方法。该种方法不需要锁相环电路,只需要通过构造任意初相位的基频正余弦信号,再与负载电压和电流经过相关变换后,就能分离出电压的基波分量,以及电流的基波有功分量,从而最终检测出电路的谐波与无功综合电流。在电网电压无畸变和存在畸变两种情况下分别进行了仿真。仿真结果证实其能够实现电网在有源滤波器的作用下只提供负载基波有功分量的目的,且不受电网电压畸变影响。
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.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第6期45-48,共4页
Power System Protection and Control
基金
西南交通大学青年教师科研起步项目(2008Q020)
关键词
无锁相环
单相电路
谐波及无功
电压畸变
检测
without phase lock loop
single circuit
harmonics and reactive currents
distortion voltage
detecting
