600MW火力发电厂电气侧状态监测研究与实践

发布时间：2019-03-22 17:58

【摘要】：随着现代大电网的互联,网架结构越来越复杂,电网对于各个供用电环节的可靠性也有更高的要求。在不增加电力设备的前提下,提高现有设备的运行可靠性可以有效提高供电设备的可靠性,保障电力系统的安全稳定运行。在电厂中,提高发电厂系统供电可靠性的主要手段是对基础供电设备进行检修,以达到提高整个供电系统可靠性的目的。如何高效安全的进行检修,是如今的一大科研方向,目前的检修方式对于萌芽状态的电气设备以及电厂运行不能够防患于未然。在线状态监测系统可以对电力设备的实时状态进行评估,通过对电力设备的实时状态进行掌握,得到其运行时的安全状态,可以在设备故障前施行对应的措施,排除安全隐患,避免电力事故。本文根据600MW火力发电厂的实际设备配置为前提,采集所检测各个设备的实时状态信息,并且对所收集的状态信息加以分析、处理,研究了本电厂的设备实时在线状态监测,其主要工作如下:(1)总体介绍600MW火力发电厂的电力设备所装设的在线监测设备,包括变压器、发电机、断路器、隔离开关、避雷器以及电容型设备的在线监测装置,并着重介绍某600MW电厂的在线监测总体情况,并根据变压器的信号采集与流向,设计了易于操作的信息采集系统与工作平台。(2)介绍了红外监测技术的设计原理、工作原理以及在实际操作中的操作方法以及监测诊断方法,并针对每个电力设备,介绍了如何应用红外监测判断设备的隐患状态。(3)结合600MW电厂运行实际,介绍了变压器蝶阀不畅、发电机线棒接触不良、断路器内部接触不良、隔离开关刀口压接不良、避雷器内部受潮等红外检测技术应用际案,说明了在线监测设备是如何判断设备安全隐患、为检修提供指导的。
[Abstract]:With the interconnection of modern large power grid, the structure of grid becomes more and more complex, and the reliability of each link of power supply and power supply is required more and more. On the premise of not adding power equipment, improving the operation reliability of existing equipment can effectively improve the reliability of power supply equipment and ensure the safe and stable operation of power system. In the power plant, the main means to improve the power supply reliability of the power plant system is to overhaul the basic power supply equipment, in order to improve the reliability of the whole power supply system. How to carry out maintenance efficiently and safely is a major scientific research direction nowadays. The current maintenance methods can not prevent the budding electrical equipment and the operation of power plants in the future. The on-line condition monitoring system can evaluate the real-time state of electric power equipment. Through mastering the real-time state of electric power equipment, it can get the safe state of its running time. The corresponding measures can be implemented before the equipment failure, and the hidden danger of safety can be eliminated. Avoid an electrical accident. According to the real-time equipment configuration of 600MW thermal power plant, this paper collects the real-time state information of each equipment detected, analyzes and processes the collected state information, and studies the real-time on-line state monitoring of the equipment in this power plant. The main work is as follows: (1) the on-line monitoring equipment installed in the electric equipment of 600MW thermal power plant, including transformer, generator, circuit breaker, disconnector, lightning arrester and capacitive equipment, is introduced in general. The general situation of on-line monitoring in a 600MW power plant is emphatically introduced. According to the signal acquisition and flow direction of transformer, an easy-to-operate information acquisition system and working platform are designed. (2) the design principle of infrared monitoring technology is introduced. The working principle, the operation method and the monitoring and diagnosis method in the actual operation are introduced, and how to use infrared monitoring to judge the hidden trouble state of the equipment is introduced in view of each electric power equipment. (3) combined with the operation practice of 600MW power plant, This paper introduces the application cases of infrared detection technology, such as the butterfly valve of transformer, the bad contact of generator rod, the bad internal contact of circuit breaker, the bad press connection of disconnecting switch knife edge, and the damp inside of lightning arrester, etc. This paper explains how to judge the hidden danger of equipment safety on-line monitoring equipment, and provides guidance for maintenance.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM621

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