摘要
为解决化工、冶金等电解行业整流系统的效率分析问题,主要是直流大电流的准确计算难题,提出了一种基于阀侧交流电流检测的直流电流间接计算方法。以阀侧交流侧电流波形为依据,利用傅立叶分解出基波与各次谐波电流,通过迭代搜索求解数值计算方法计算出直流电流。针对实例波形,基于Graham-Schonholzer法推导了基波与各次谐波电流值,并与测试仪测试值进行了对比;其后通过分解值求解出直流电流,并与根据实际波形测量求得的直流电流值进行对比,结果表明了此方法具有较高的精确度,可满足相关整流系统的直流大电流测量及其效率分析。
In order to solve the problem of efficiency calculation, especially the high precision on-site measurement of the heavy direct current for the industry high power rectifier systems, a indirect calculating method of the heavy direct current based on AC currents measuring of the vlave side is presented. Avoiding the harmful effects of the high-intensity magnetic field and heavy direct current and strong corrosive medium to the existing measuring devices, based on conversion of the valve side current and DC current, the Fast Fourier Transform Algorithm （FFT） was proposed to obtain the values of fundamental and characteristic harmonic orders currents. Then, the value of heavy direct current is calculated by using the iterative search method. Then, the value of heavy direct current is calculated by using the equations of Graham-Schonholzer method. Finally, based on a practical project, the calculating DC value is compared with the testing value. The result shows the high precision of new calculating method and its feasibility to the efficiency analysis of the industry heavy direct currents system.
出处
《电力学报》
2015年第3期195-199,274,共6页
Journal of Electric Power
基金
国网湖南省电力公司科技项目(5216A514003G)
