基于变步长原理的改进型高精度数字积分算法  

Improved High-precision Digital Integral Algorithm Based on Variable Step Principle

作　　者：李振华[1,2] 田斌[2] 胡蔚中 李振兴[2] 

机构地区：[1]新能源微电网湖北省协同创新中心(三峡大学),湖北省宜昌市443002 [2]三峡大学电气与新能源学院,湖北省宜昌市443002

出　　处：《电力系统自动化》2018年第2期136-142,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(51507091);湖北省自然科学基金资助项目(2015CFB219)~~

摘　　要：为解决电子式电流互感器测量中积分环节中低频噪声、电压漂移及测量精度问题,提高空心线圈电子式电流互感器的工程实用性,依据变步长积分算法的原理,提出一种改进型高精度数字积分算法。算法的频率特性与理想积分的误差相对于一些改进积分算法要小的多,同时该算法具有采样率适中、计算量少、精度高的优点。仿真实验结果表明,所提改进算法性能优良,具有更强的抵抗噪声干扰和电压漂移的能力。In order to solve the problems of low frequency noise, voltage drift and the measurement accuracy in the integral part of the electronic current transformer measurement and improve the engineering practicability of air-core coil electronic current transformer, an improved high-precision digital integral algorithm is proposed based on the principle of variable step integral algorithm. Compared to some other improved integral transfer functions, the error of the frequency characteristic and the ideal integral is much smaller. Meanwhile, the algorithm has the advantages of moderate sampling rate, less amount of calculation and high precision. The simulation results show that the improved algorithm has good performance and better ability of resisting noise and voltage drift.

关 键 词：电子式电流互感器 积分环节 变步长 噪声干扰 电压漂移 

分 类 号：TM452[电气工程—电器]