描述
继电保护状态检修具有三大特点,第一,继电保护状态检修耗时较短、结果准确性高等的优点,在电力系统各设备运行过程中,继电保护状态检修在设备一旦出现运行问题时会即刻采取检修操作,准确确定问题类型,并进行设备的维修和保护,以提高电力系统运行的稳定性。第二,继电保护装置具有自检测能力。在继电保护状态检修过程中,电气设备的某些高级部件具有自检测能力,可用以自身保护装置的系统装换,或者其他保护装置的系统装换,可在运行过程中准确发现系统存在的问题,以实现对运行状态的检修和保护。第三,继电保护装置可进行控制或者切入模式。继电保护装置除进行日常的检修工作外还可以通过其他方式对电器设备进行控制或者切入操作,但是这种方式在国内应用较少,尚存在部分不足,相关学者在该方面的研究有待加强。继电保护状态检修是根据先进的状态监测和诊断技术提供的设备信息,以继电保护装置和二次设备运行及检修基础资料为参考,检修策略的形成首先需要通过对继电保护设备的运行状态评价、风险评估、检修决策等,在检修成本合理的范围内,选择合适的检修策略使得设备稳定安全可靠运行[2]。由此可见基础资料的搜集是继电保护状态检修各环节开展的依据。基础资料的搜集分为四部分:原始资料搜集、运行资料搜集、检修资料搜集、其他资料搜集。
原始资料搜集主要是指搜集变电站继电保护设备的设备型号、批次号、使用说明、平均故障时间、出厂试验报告,技术资料、变电站设备安装记录、变电站建设图纸、验收报告、以及相关会议记录等。运行资料搜集主要是指搜集继电保护装置设备投入使用时间、以及投入运用以来的运行状况,其中保护动作记录、装置零部件更换记录、保护定值的修改记录等,装置的巡检记录、故障记录等。检修资料搜集主要是指搜集继电保护装置的定期检验报告、诊断性试验报告、继电保护设备的故障采取应对措施资料的搜集等。其他资料:其他资料主要是指继电保护装置使用保护软件版本、历年设备分析报告、历年状态评价报告、年度运行分析报告等。
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