摘要
我国高压输电线路的地线由普通绝缘地线和OPGW两根地线共同作用而成。本文以某750k V输电线路为例,利用ATP计算了四种接地方式下地线的感应电流和感应电压。研究表明线路正常运行以及发生单相接地短路故障时,逐塔接地的地线上感应电流最大,单点接地、分段绝缘地线的感应电压较大,且随分段长度增加而增加。计算结果为OPGW接地方式的选择及改进提供依据。
The ground wire of high voltage overhead line commonly composes a common overhead ground wire and an OPGW. The induced voltage and current of four grounding modes of a typical 750 k V transmission line are calculated by ATP. It is shown that the induced current is largest when ground wire is grounded at each tower. When segment-insulated grounding at one tower is adopted, the longer the segment length is, the larger the induced voltage is. The results provide a basis for selection and improvement of OPGW grounding mode.
出处
《电气技术》
2015年第5期82-84,94,共4页
Electrical Engineering
基金
西安科技大学青年培育基金(201322)
