交流采样中角差的一阶修正算法  

The First-Order Compensation Algorithm for Phase Shift when using AC Sampling Method

作　　者：刘万山 

机构地区：[1]绵阳市维博电子有限责任公司电力与新能源开发部,四川绵阳621000

出　　处：《电源技术应用》2013年第4期28-31,共4页Power Supply Technologles and Applications

摘　　要：当采用交流采样技术对电网信号进行采样时，由于采样电路参数不可能完全一致，软件上对多路信号也不可能做到绝对的同步采样，多通道之间必然存在角差，在测量和计算线电压、功率、功率因数以及正序、负序、零序分量等参数时，若不采取适当办法修正，必将导致误差。文中提出了一阶移相修正算法，并做了详细的误差分析。算法已成功的应用于实际产品的开发，实践证明，可以有效地修正角差，算法计算量小，且适用于畸变信号的处理。There must be phase shift when sampling the grid based on the AC Sampling Technology because of the imperfectly the matching of the circuit parameter, and the impossibility for samphng the multiple channels synchronously. There will be error if the shift not be compensated by appropriate method while measuring or calculating the phase to phase voltage, power, power factor, positive-sequence, negative-sequence and zero-sequence voltages. This article present an algorithm called First-Order Shift, and the error has been analyzed in detail. The algorithm which has been used in products has proved that it can compensate the shift effectively, less computation and can be used for distorted signal processing.

关 键 词：交流采样 同步 角差 一阶移相 

分 类 号：TM933.3[电气工程—电力电子与电力传动]