大容量电动机反馈电流对10kV配电网的影响  

Impacts of Large Capacity Motor Feedback Current on 10kV Distribution Network

作　　者：许慧一[1] 王道刚 

机构地区：[1]福建水利电力职业技术学院,福建永安366000 [2]启东市供电公司,江苏启东226200

出　　处：《电工电气》2010年第11期49-51,共3页Electrotechnics Electric

摘　　要：介绍了异步电动机反馈电流及决定反馈电流的因素,经过实例分析表明,通过计算短路时不同容量电动机对系统提供反馈电流的大小以及该电流所占短路电流总值的比重,得出小容量电动机其对短路点提供的反馈电流相对于短路点总电流过小,可以忽略不计。但随着高压大用户电动机容量的不断增大,电动机对短路点提供的反馈电流所占比重也越来越大,应增强大容量异步电动机对系统短路故障影响的意识。Introduction was made to asynchronous motor feedback current and factors determining feedback current. Actual example analysis shows that when short circuit took place, according to the volume of feedback current to the system provided by different ca- pacity motors and the current in the proportion of total short-circuit current value, the feedback current from small capacity motors to their short-circuit points was too small to calculate, relatively compared with total current of short-circuit points. With the high-voltage big user’s motor capacity increasing, the feedback portion current provided by motor to short-circuit points is getting larger and larger, so the attention should be paid to the impacts of large capacity motor on short-circuit system faults.

关 键 词：系统故障 异步电动机 反馈电流 三相短路 

分 类 号：TM343.2[电气工程—电机]