期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
不同电压等级下同塔双回线路差动保护的电容电流补偿研究 被引量:1
1
作者 王笑棠 王灿灿 +5 位作者 姜文东 龚坚刚 夏之罡 朱利锋 宋艳 邓旭 《能源工程》 2013年第1期26-30,39,共6页
探讨了不同电压等级下同塔双回线路在分别采用基于单、双回电容电流补偿方案后,线路差动电流与线路长度的关系。研究表明,对于110kV同塔双回线路,分布电容电流不超过100A,可以不采取补偿措施;对于220kV线路,当线路长度小于300km时,单、... 探讨了不同电压等级下同塔双回线路在分别采用基于单、双回电容电流补偿方案后,线路差动电流与线路长度的关系。研究表明,对于110kV同塔双回线路,分布电容电流不超过100A,可以不采取补偿措施;对于220kV线路,当线路长度小于300km时,单、双回补偿效果差异不大;当线路长度大于300km时,双回补偿效果较单回补偿明显;对于500kV和750kV线路,由于线路电压较高且实际工程中线路长度一般较长,分布电容电流对差动保护的影响较大,采取基于双回线的电容电流补偿效果明显优于单回补偿。最后根据仿真结果,给出了针对不同电压等级的同塔双回线路的电容电流补偿方案建议。 展开更多
关键词 同塔双回线路 差动保护 分布电容电流 单回补偿 双回补偿
下载PDF
Average modeling of Single Stage Flyback PFC + Flyback DC/DC converter 被引量:1
2
作者 沈淼森 康婉莹 钱照明 《Journal of Zhejiang University Science》 CSCD 2002年第1期77-81,共5页
With the use of this novel average model for Single Stage Flyback PFC+Flyback DC/DC converter, voltage control mode, peak current control mode and average current control mode can be simulated easily by changing the m... With the use of this novel average model for Single Stage Flyback PFC+Flyback DC/DC converter, voltage control mode, peak current control mode and average current control mode can be simulated easily by changing the model's parameters. It can be used to do various analysis not only for small signal and static behavior but also for large signal and dynamic behavior of the converter. By using this average model the simulation speed can be improved by 2 orders of magnitude above that obtained by using the conventional switched model. It can be applied to optimize the trade\|off between high power factor, voltage stress, current stress and good output performance while designing this kind of single stage PFC converter. A 60W single stage power factor corrector was built to verify the proposed model. The modeling principle can be applied to other Single Stage PFC topologies. 展开更多
关键词 average model power factor correction single stage
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部