摘要
电力机车通过关节式电分相时,经常发生过电压现象,导致牵引变电所跳闸,对接触网和牵引变电所的安全运行构成严重影响。电力机车通过关节式电分相时,入分相的受电弓与中性线接触、受电弓与接触网分离、出分相的受电弓与牵引网接触、受电弓离开中性线4个过程中容易产生过电压。本文使用Matlab/Sim Power Systems对上述过程进行建模仿真,分析中性段产生过电压的原因,提出抑制过电压措施。仿真结果表明,阻容保护器可有效抑制电力机车通过关节式电分相时在中性段产生的过电压。
The overvoltage occurs frequently as the electric locomotive is passing over the articulated phase break that will lead to tripping of traction substation and cause severe impact to safety operation of overhead contact system and traction substation. As the electric locomotive is passing through the articulated phase break, the overvoltage is liable to occur under the following 4 processes: contact between pantograph and neutral line, separation between pantograph and overhead contact system when pantograph is running into the neutral section, and contact between pantograph and traction network, separation between pantograph and neutral line when the pantograph is leaving off the neutral section. The Matlab/Sim Power Systems is used for simulation of above-mentioned processes on the basis of establishment of a model, and over-voltage suppression measures have been put forward on the basis of analyzing the causes of overvoltage at neutral section. The simulation results show that resistance-capacitance protector is able to suppress over-voltage generation effectively at neutral section as the electric locomotive passing through the articulated phase break.
出处
《电气化铁道》
2017年第2期40-44,共5页
Electric Railway
关键词
电力机车
关节式电分相
过电压
Electric locomotive
articulated phase break
over-voltage