核电厂应急柴油发电机继电保护分析

The Feature of Emergency Diesel Generator Relaying Protection in Tianwan Nuclear Power Station

文章主要介绍了核电厂应急柴油发电机功能与特点,在核事故情况下起到的重要性。详细介绍了继电保护的特点及保护配置,论述保护方案的合理性,能够完全满足应急柴油发电机的各种运行状态。对继电保护装置的原理、特性进行详细的论证分析,在应急柴油机出现不正常运行状态和严重故障情况下的保护动作,快速切除柴油机,防止柴油机的进一步损害;分析了应急柴油发电机在外部电源扰动情况下,继电保护装置如何快速响应,闭锁保护动作,避免应急柴油发电机不必要的情况下切除,造成应急电源失去,影响核电厂安全。同时,分析了继电保护装置保护定值的灵活应用,满足各种运行状况。阐述了核电厂由于其核安全的特殊性,导致继电保护配置的特殊性,分析了此种保护在其他设备上应用的可能性,并对设计提供的保护定值进行分析,提出自己的观点。

This paper mainly introduces the function and feature of emergency diesel generator in nuclear power plant, which plays an important role in nuclear accident. It minutely tells about the feature and configuration of relay protection and discusses the rationality of protection scheme, which shows that it can be completely contented all kinds of operation states. It is an analysis and argument about the principle of relay protection in detail, that would operate correctly when emergency diesel generator be in abnormal operating and serious fault conditions, such as cut off emergency diesel generator in order to avoid more harm to emergency diesel generator. It analyzes how the relay responses quickly and locks up the protection action under perturbations in the external power, so it can avoid unnecessary resection of emergency diesel generator to emergency power supply loss and effect of nuclear safety. It also analyzes the flexible use of protection setting of the protective relay to meet various operating status. It elaborates the particularity of relay protection which is due to the particularity of nuclear safety. It analyses the possibility of relay protection which has to be applied to other equipment and the protection setting that was provided by design institute, and puts forward the author＇s viewpoints.