摘要
配电网一二次设备融合后,二次设备因长期处于一次高温环境中,其内部电子器件性能易受温度影响。分析了温度对二次设备内元件及信号调理电路的影响,基于高低温试验环境箱搭建了试验测试平台,通过采集二次设备互感器的比值差和相位差进行测量精准度的对比分析,为提高测量精准度,提出采用非线性软件补偿方式,并进行了软件算法原理分析和试验验证。试验结果表明,取样电阻和差分运算放大电路的温度相关系数是影响二次设备采集准确度的关键,温度变化会造成二次设备的测量准确度下降,在高温60℃、低温-30℃左右已不能满足配电开关的要求,加入非线性软件补偿后比值差变化在0.15%~0.3%之间波动,可以有效提高测量准确度。
The performance of internal electronic devices of the secondary equipment is susceptible to temperature because the secondary equipment has been in the primary high temperature environment for a long time after primary and secondary fusion of the distribution network.The paper analyzes temperature effects on internal devices of the secondary equipment and signal conditioning circuit,and it also establishes a test platform based on the high and low temperature environmental chamber.The measuring accuracy is compared and analyzed by collecting ratio error and phase difference of the secondary equipment transducers.Moreover,the paper puts forward a nonlinear software compensation method and conducts the software algorithm principle analysis and test verification to increase the measuring accuracy.The results show that the temperature correlation coefficient of sampling resistance and differential operational amplifier circuit are the key factors to acquisition accuracy of the secondary equipment.Temperature variation decreases measuring accuracy of the secondary equipment.It cannot meet the requirement of distribution switches at high temperature of 60℃and low temperature of-30℃.The measuring accuracy can be effectively increased by employing the nonlinear software compensation method which ensures the fluctuation of the ratio error between 0.15%and 0.3%.
作者
赵海洋
滕达
姜晓君
侯永涛
ZHAO Hai-yang;TENG Da;JIANG Xiao-jun;HOU Yong-tao(China Information Technology Designing&Consulting Institute Co.,Ltd,Beijing 100048,China)
出处
《电工电气》
2023年第2期57-62,共6页
Electrotechnics Electric
关键词
配电网
温度变化
一二次融合
测量准确度
二次设备
distribution network
temperature variation
primary and secondary fusion
measuring accuracy
secondary equipment
