基于ADE7878的零序电流相位角计算方法研究  

Research on Phase Angle Calculation Method of Zero Sequence Current Based on ADE7878

作　　者：秦亚杰 朱建良[1] 薄煜明[1] 吴盘龙[1] 

机构地区：[1]南京理工大学自动化学院,南京210094

出　　处：《淮阴工学院学报》2017年第5期23-27,共5页Journal of Huaiyin Institute of Technology

基　　金：国家自然科学基金(61473153);江苏省产学研联合创新资金-前瞻性联合研究项目(BY2016004-04)

摘　　要：单相接地故障是电力系统配电网络中故障发生的主要原因之一。针对通过零序电流大小判断单相接地故障的局限性,为了有效快速隔离配电网单相接地故障点,研究通过零序电流相位角来判断故障点所在位置区间的方法。通过ADE7878读取三相电流以及三相电压的瞬时值,分别使用全周积分算法和全波傅里叶算法来处理数据,得到零序电流、电压的实部和虚部,求取夹角得出相位角的大小。结果表明,全波傅里叶算法得出的数据误差标准差比前者降低了80%,面对复杂的电力系统,该算法可以更为有效处理三相电能数据,符合微机保护准确性和可靠性的要求,在电力系统网络故障隔离中有关键作用。The single-phase earth fault is one of the main reasons for the malfunction of power system distribution network in China. Since the use of zero-sequence current size to detect single-phase earth fault is limited,the method adopted in the research is judging fault point through zero-sequence current phase angle in order to isolate the single-phase earth fault points of the distribution network efficiently and quickly. First using ADE7878 to read the instantaneous value of three-phase current and three-phase voltage,then applying Full-Cycle Integral algorithm and Full Wave Fourier algorithm respectively to process data and get the real part and imaginary part of zero-sequence current and voltage,and finally calculating the included angle to get the phase angle. The experimental results indicate that the data error standard deviation from Full Wave Fourier algorithm is 80% lower. In the face of complicated power system,Full Wave Fourier algorithm can process three phase electric energy more effectively,meets the requirements of accuracy and reliability of microcomputer protection,and plays a key role in the power system network fault isolation.

关 键 词：ADE7878 相位角 全周积分算法 全波傅里叶算法 

分 类 号：TM77[电气工程—电力系统及自动化]