摘要
为有效解决接地网腐蚀诊断建模时诊断方程的欠定、病态特性,推导出一种基于Tikhonov正则化原理的总体最小二乘法,并编写了相应的程序。以重庆某110 k V变电站接地网为研究对象进行试验,设置了3组故障来模拟诊断接地网的腐蚀,以重现现场试验条件。结果表明:无论是针对第(1)组不定故障支路数下的腐蚀诊断,还是第(2)组确定故障支路数下的腐蚀诊断,该方法均能快速诊断成功,并满足工程上10%的误差要求;对于第(3)组6条支路同时故障的情况,在适当调整测试方案后,其诊断效果依然可观。相比于传统的遗传算法,所提方法有效避免了交叉、变异等复杂环节,提高了诊断效率。
In order to settle the underdetermined and ill-conditioned equations in diagnosis system, the total least squares method based on Tikhonov regnlarization is conducted and the corresponding codes are compiled. Moreover, a 110 kV transformer substation in Chongqing is tested and three sets of faults are set up to simulate the corrosion of the ground network to reconstruct the field test conditions. The results show that the fault either undetermined or determined branch fault can be easily diagnosed with a relative error of 10%. In the case of concurrent fault of six branches, it can also be diagnosed easily after proper adjustments. Compared with the traditional genetic algorithm, this method avoids crossover and aberrance effectively and diagnostic efficiency is improved apparently.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2017年第8期2709-2717,共9页
High Voltage Engineering
基金
国家创新研究群体基金(51021005)~~
关键词
接地网
腐蚀诊断
欠定特性
病态特性
TIKHONOV正则化
总体最小二乘法
grounding grid
corrosion diagnosis
underdetermined characteristic
ill-conditioned characteristic
Tikhonov regularization
total least squares
