某抽水蓄能机组非电气量保护控制逻辑及功能实现

非电气量保护对于保障水电机组机械设备安全运行意义重大。抽水蓄能机组工况转换频繁、辅助设备多,其非电气量保护具有点多面广、零散多样的特点,目前无完善统一的设计控制技术标准和规范,保护误动和拒动现象较普遍。对此,以某抽水蓄能机组为例,针对其相关运行设备及控制系统进行非电量保护点量梳理和控制逻辑优化,以危险程度为依据将故障源分为3类,对应的动作结果分别为报警、机械事故停机和紧急事故停机。分别在发电态和抽水态模拟机械事故和紧急事故停机,验证了非电气量保护动作时事故停机流程执行的正确性和相关设备动作的可靠性,为该领域完善发展提供了参考。

Control Logic and Function Realization of Non-electricity Protection for a Certain Pumped Storage Power Unit

Non-electricity protection plays an important role in ensuring the operation safety of mechanical equipment of hydropower unit. Non-electricity protection of pumped storage unit has characteristics of complex, scattered and diverse due to its frequent condition transformation and more auxiliary equipment. There is no unified technology standards and specifications of non-electricity protection at present. So, the problem of protection misaction and rejecting action was common. For this purpose, taking a certain pumped storage unit as an example, measuring points were arranged and control logic was optimized of non-electricity protection according to operation equipment and control system. Fault sources were divided into three categories which based on the degree of danger, the corresponding action results were warning, mechanical accident and emergency shutdown. The correctness of the process execution and the reliability of the relevant equipment actions during emergency shutdown were validated by simulating mechanical accidents and emergency shutdown in the generation and pumping condition, which provides reference for improvement and development of this field.