摘要
针对传统同步检测算法在三相电压不对称或畸变时存在的缺陷,提出了利用PARK变换提取基波正序电压代替相电压的改进算法.考虑到系统实时性和稳定性,采用TMS320VC5402数字信号处理器实现该算法,可完成对三相不对称系统中不对称、无功和高次谐波电流的检测与补偿.理论推导和仿真结果验证了所提方法的正确性.
Limitations of the conventional synchronous detecting method for reactive and harmonic currents in case of unbalanced or distorted three-phase voltages is discussed. Then, an advanced method is proposed to replace the phase voltage by fundamental positive-sequence voltage. Taking accout of the speediness and stability, it was carried out by TMS320VC5402 Digital Signal Processor（DSP）. It can be fast and accurately detect the sum of fundamental reactive current, unbalanced components and harmonics. The theoretical analysis and simulation verify the feasibility of this method.
出处
《江南大学学报（自然科学版）》
CAS
2007年第2期168-172,共5页
Joural of Jiangnan University (Natural Science Edition)
关键词
同步检测方法
有源电力滤波器
谐波和无功电流
synchronous detecting method
active power filter
harmonic and reactive current
