Analysis of a maloperation of transformer's backup protection in 110 kV Zhaodong station 昭东电站110kV主变后备保护拒动原因分析
High-frequency protection maloperation analysis caused by receiver with high-level 一起收信电平过高引起的高频保护误动分析
The Reason Analysis and Preventive Measures for A Maloperation of Bus Differential Protection 一起母差保护误动原因分析及防范措施
Analysis of a 110 kV substation 1# main transformer protection maloperation and research of the reformation programme 110kV某变电站1主变保护误动分析及改造方案的研究
Analysis and solution for blind zone protection maloperation of MCD-H2 optical fiber differential protection device MCD-H2型光纤差动保护装置盲区保护误动分析及对策
Cause Analysis on Maloperation and Failure of Thermal Protection in Thermal Power Plant of Baotou Steel 包钢热电厂热工保护误动及拒动原因分析
Aiming at false wiring of negative sequence current relay, analyzes the reason, treatment and second loop grounding unreasonable of maloperation from practice and theory. 针对一起负序过电流继电器误解线的典型事故,对保护误动作的原因、处理方法及二次回路接地不合理等问题,从实践和理论方面进行了深入地分析。
Causes of Maloperation in Differential Protection of Transformer 变压器差动保护误动原因探讨
Interference-proof measures of digital time relay are discussed in this paper by analyzing maloperation causes of digital time relay under the conditions of interference by EM. The purpose is to give a reference to improve interference proof performance and reliability of digital time relay. 通过对数字式时间继电器在电磁干扰情况下的误动原因的分析,初步论述了数字式时间继电器在这种干扰条件下的抗干扰措施,为进一步提高数字式时间继电器抗干扰性能和可靠性提出参考依据。
Application of GPS In The Analysis of Maloperation Accident In HV Line Protection GPS在高压线路保护误动事故分析中的应用
The maloperation of this protection is not a common phenomenon. The answer is not exactly. 保护的不正确动作并不是一个普遍现象。答案并不确然。
Maloperation is one of the important causes for crane accidents with personnel injury and death. 引起起重机设备与人身伤亡事故的重要原因往往是操作失误。
Earth lines without anti maloperation devices may easily cause fault operation. 无五防装置的接地线,容易造成误操作。
In this paper a malfunction of a CSB 21A digital automatic throw-in equipment of emergency power supply is analyzed. The causes of the maloperation are detailed and some correcting suggestions are proposed, which are very useful for practical work and the improvement of equipment functions. 对CSB21A数字式备用电源自动投入装置的一次误动行为进行了分析,指出了误动作原因,并结合运行经验提出了一些整改建议,对实际工作及进一步完善装置功能有一定的借鉴意义。
The maloperation of directional high frequency relay composed of CKF integrated circuit protective device and receiving transmitting unit is analyzed with examples. 对由CKF集成电路保护装置与收发信机构成的方向高频保护误动进行了具体的实例分析,找出了误动的原因是保护装置出口延时太短和收发信机存在收信间断问题。
Glow discharge may result in flashover and ground short circuit of the line, endanger personal and equipment safety, and cause communication failures and protection maloperation. 辉光放电可能造成线路闪络接地短路,威胁人身和设备安全,并引起通信故障和保护误动。
Agent protection can prevent the maloperation and accelerate the backup protection. 大型电站Agent保护对于保护整体性能的提高主要体现在防止保护的不正确动作和加快后备保护的动作速度。
This paper analyses the reasons briefly that make the circuit breaker protection maloperation, and discusses problems of the starting circuit in the failure protection. Solving method is put forward in this paper that is to improve of the complex-voltage-blocking criterion when transformer protection start breaker failure protection. 简要分析了造成断路器失灵保护误动的原因,并分析了失灵保护中启动回路存在的一些问题,提出了相应的解决方法:主变失灵时解除失灵复合电压闭锁判据的改进;
When adopting the blocking scheme in DLP protection equipment, ignoring the effect of high frequency protections ′ s command transmission time in carrier wave channel led to the high frequency protection ′ s maloperation on the fault out of protection region. 在采用DLP保护装置Blocking方案时,由于对其高频保护配合关系研究不够、忽视了高频保护命令载波通道传输时间的影响,导致了区外故障时高频保护误动。
Analysis of the reasons for differential protection maloperation in meso-low power supply system and its treatment 中低压供电系统差动保护误动原因分析及对策
Method for solving the brief maloperation problem of zero sequence directional relay after the clearing of a external fault; 解决外部接地故障切除瞬间,零序方向元件短时误动作问题的方法;
Analysis of protection maloperation caused by oscillation current in interconnected system and countermeasures 互联系统振荡电流造成保护误动分析及对策研究
By analyzing two external faults causing the maloperation of ground fault protection, this paper represents the necessity and method of checking the setting value of zero-sequence fundamental voltage in ground fault protection for generators. 该文结合两次区外故障引起发电机定子接地保护误动的分析,阐述了发电机定子接地保护中基波零序电压定值校核的必要性和方法。
Analysis and countermeasures of maloperation of microprocessor-based transformer protection 微机型变压器保护装置误动的原因分析与对策
The current transmission error of CT saturation is one of the main factors of current differential protection maloperation. 电流差动保护中区外故障时电流互感器饱和而造成的电流传变误差,是引起电流差动保护误动的一个重要因素。
The test and research of maloperation of dry reed relay 干簧继电器误动问题的试验与研究
The main reason of maloperation on traditional protective relaying for bus is CT's saturation. 电流互感器饱和是造成传统母线保护不正确动作的主要原因。
In this method, the maloperation is described conveniently, and risk identification is conducted effectively aiming at maloperation. 不仅能够方便地描述三种不同类型的误操作,还能有效地对误操作进行风险辨识,具有一定的适用性。