Electronic valve type power directional relay 电子管功率定向继电器电子管式心电描记器
Action Analysis of Generator Negative Sequence Power Directional Relay 发电机负序功率方向继电器动作分析
The influence on sensitivity and reliability caused by setting calculation of directional overcurrent protection is discussed, including influence on those of high frequency components and power directional relay. New setting calculation methods and researches on sensitivity and reliability are described. 探讨了方向电流保护的整定对灵敏度及可靠性的影响,包括谐波、功率方向继电器等的影响,还探讨了一些新的整定计算方法及灵敏度、可靠性研究方面的新动向。
In order to improve the reliability of voltage type longitudinal zero sequence inter turn protection performance for generator, there should be a negative sequence power directional relay protection as well as a special interlock device for TV circuit break off. 为提高纵向零序电压型发电机匝间保护动作的可靠性,在保护构成上,除专用TV断线闭锁装置外,还应增加负序功率方向继电器。
An analysis was made on frequent trip failures of 3 000 kW back pressure turbo-generator unit due to wrong wiring of the power directional relay. Causes of the protection system's misoperation and solutions were given. 分析了3000kW背压汽轮发电机因功率方向继电器接线错误引起的频繁误跳闸事故,并指出了保护误动作的原因和改正的方法。
Analysis on the Advancement of Operating Criteria for Power Directional Relay 功率方向元件动作判据的改进功率方向继电器的动作行为分析方法