| 引用本文: | 姜宁,王东海,王春宁,马宏忠,倪欣荣,徐树峰,黎腊红.电力电缆护层电压补偿装置研究[J].电力自动化设备,2007,27(4):52-55 |
| .Research on shield voltage compensation unit of power cable[J].Electric Power Automation Equipment,2007,27(4):52-55 |
|
|
| 摘要: |
| 电力电缆线路改造时容易造成换位的电缆三段不等长,从而引起护层电压不平衡,产生护层环流。在对电缆护层电压理论分析的基础上,推导了电缆几种主要排列方式下的护层感应电压数学模型;提出了电缆护层电压的补偿方法。该方法是在电缆终端增加一补偿电感,即在铁芯上绕制线圈,此线圈一端接电缆金属护层末端,另一端接地,基于这一补偿方法开发了补偿装置计算的软件包,并进行仿真计算,在此基础上研制了补偿装置。通过改变该补偿装置的气隙和匝数,可以对电缆护层电压进行有效补偿,使补偿后电缆护层的总电压大为减小,有效地抑制了护层环流,可大幅度降低电缆损耗,提高电缆传输容量。 |
| 关键词: 电力电缆,护层电压,补偿装置,护层环流 |
| DOI： |
| 分类号:TM247 |
| 基金项目:国家自然科学基金
,
高等学校优秀青年教师教学科研奖励计划 |
|
| Research on shield voltage compensation unit of power cable |
|
JIANG Ning WANG Dong-hai WANG Chun-ning MA Hong-zhong NI Xin-rong XU Shu-feng LI La-hong
|
| Abstract: |
| The reconstruction of power cable lines often makes the three segments of the transposed cable unequal in length,which causes the metal shield voltage unbalanced and produces shield circulating current.Based on theoretical analysis,the mathematic models of induced voltage under several main arrangement modes are deduced.The compensation method is put forward,which connects an inductance to the end of cable metal shield.It is a grounded winding on an iron core,and the corresponding compensation unit and simulation calculation software are developed.By changing air gap and turn number of the inductance,it reduces the induced voltage of metal shield efficiently and thus suppresses the circulating current,with cable loss lowered and transmission capacity enhanced. |
| Key words: power cable,shield voltage,compensation unit,shield circulating current |
