• 主题
高级搜索  >
历史搜索 清空历史
首页> 外国专利> RELAY PROTECTION METHOD AND DEVICE AGAINST LC PARALLEL CIRCUIT DETUNING FAULTS.

RELAY PROTECTION METHOD AND DEVICE AGAINST LC PARALLEL CIRCUIT DETUNING FAULTS.

机译：用于LC并联电路故障的继电器保护方法和装置。

页面导航
  • 摘要
  • 著录项
  • 相似文献

摘要

A relay protection method against LC parallel circuit detuning faults comprises the steps of: a relay protection device samples a current of a parallel LC, that is, a reactor and a capacitor, and samples a total current flowing through the whole LC; convert the current of the reactor into a current of an equivalent capacitor; calculate amplitudes of the current of the equivalent capacitor and a current of a realistic capacitor, and calculate an amplitude of the total current flowing through the LC; calculate a current amplitude ratio of the equivalent capacitor to the realistic capacitor; and when the amplitude of the total current flowing through the LC is large enough, send an alarm signal or a trip signal by delay and output an idle contact of a trip relay if the current ratio exceeds a preset upper and lower limit range. Also provided is a corresponding relay protection device. The relay protection method and device against LC parallel circuit detuning faults can improve stability of calculation results of a current ratio, and raise sensitivity and rapidity of protection.
机译：一种用于LC并联电路失谐故障的继电保护方法，包括以下步骤：继电保护装置对并联LC的电流即电抗器和电容器进行采样，并对流过整个LC的总电流进行采样。将电抗器的电流转换成等效电容器的电流;计算等效电容器的电流幅度和实际电容器的电流幅度，并计算流过LC的总电流的幅度;计算等效电容器与实际电容器的电流幅度比;当流过LC的总电流幅值足够大时，如果电流比超过预设的上限和下限范围，则延迟发送警报信号或跳闸信号，并输出跳闸继电器的空闲触点。还提供了相应的继电保护装置。该针对LC并联电路失谐故障的继电保护方法及装置，可以提高电流比计算结果的稳定性，提高保护的灵敏度和速度。

著录项

相似文献

  • 专利
  • 外文文献
  • 中文文献
获取专利

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号