摘要
电力机车安全可靠地工作对保障电气化铁路的安全运行具有十分重要的意义。分别分析了机车在启动工况和正常运行工况下的网侧谐波电流,并对这两种工况电流进行仿真,从中提取出变压器短路故障差异性较大的谐波特征量。二次谐波和三次谐波特征量构成了机车网侧谐波电流保护。理论证明,机车网侧谐波电流保护具有较高的灵敏度和实用价值。
Safe and reliable running of electric locomotives is very significant to guarantee the safe operation of electric railways. The grid-side harmonic currents in startup condition and normal operating condition of locomotives are analyzed respectively, and the currents in these two conditions are simulated to find out the harmonic characteristics with large difference in transformer short-circuit failure. The locomotive grid- side harmonic current protection is composed of harmonic characteristics of the second harmonic and third harmonic. Theories prove that the locomotive gird-side harmonic current protection features high sensitivity and practical value.
出处
《自动化仪表》
CAS
北大核心
2012年第9期8-10,共3页
Process Automation Instrumentation
基金
铁道部科技研发计划基金资助项目(编号:2011J016-C)
