摘要
对输电线路感应电产生的原因进行分析,通过对广西电网110～500 kV典型输电线路上的电场强度和感应电压实测和分析,结果表明线路杆塔上的工频电场强度分布极不均匀,大多数220 kV线路塔上人体感应电流已经超过了150μA的限值。线路上的感应电压也远远超过人体36 V的安全电压。根据测试结果有针对性地提出了电场和感应电压的防护措施。
The reason of inductive voltage of transmission line is analyzed.According to field tests and analysis of electric field intensity and inductive voltage of typical 110～500 kV transmission lines,it is found that the distribution of power frequency electric field intensity on transmission line tower is extremely non-uniform,and the human body inductive current on most 220 kV transmission line towers is over the limit value of 150 μA,and the inductive voltage along transmission line is far over the human body safe voltage of 36 V.Protection measures of electric field and inductive voltage are also proposed based on test results.
出处
《广西电力》
2010年第2期5-7,35,共4页
Guangxi Electric Power
关键词
输电线路
电场强度
感应电压
防护
transmission line
electric field intensity
inductive voltage
measurement
protection
