4X50MW小型火电厂监控系统设计.docx

PAGE \* MERGEFORMATI PAGE \* MERGEFORMATVI 摘 要 发电厂是电力系统的重要组成部分，关系到电力系统的稳定运行。本设计主要是发电厂综合自动化系统的设计，最终实现无人值守升压站综合自动化功能。就发电厂而言，出于运行方式灵活的需要，许多发电厂在厂内设置主要由高压配电装置、高压母线、变压器、传输线等组成的升压站，其相应的网络控制、保护、远动等设备构成了升压站二次系统。升压站控制系统具有就地和远方控制及监视的功能。可在升压站保护小室内控制、监视系统设备，也可在升压站就地进行断路器、隔离刀闸的操作。系统采用分散分布式配置，采取系统功能下放；实行双总线，实时网冗余配置及双控制卡配置，进一步提高系统的可靠性；系统各部件之间采用局域网及光纤通信方式，保证了通信速率及资源共享。 本设计主要是针对小型火电厂设计的，主要包括一次系统的设计、二次系统的设计以及监控系统的实现。一次系统设计包括四部分，分别是主变发电机选型、电气主接线确定、短路电流计算、电气设备选型；二次系统设计包括主变保护、线路保护以及防雷接地保护；监控系统主要是利用Epsynall组态软件，实现变电站综合自动化。本设计从理论上证实了该发电厂的实际可行性，其最终的效果能达到预期的要求。 关键词：火电厂；主接线；监控系统 Abstract Power plant is an important part of power system, and it is related to the stable operation of power system.. This design is the design of the power plant integrated automation system, and finally realizes the automatic function of the unattended boost station.. Power plant, the need for flexible mode of operation, many power plants set with main high-voltage power distribution equipment, high voltage bus, transformers, transmission lines, and is composed of a boost from the station, the corresponding network control, protection, remote control and other equipment constitute a boost the secondary system. The control system of the boost station has the function of local and remote control and monitoring.. In the boost station to protect the small indoor control, monitoring system equipment, but also in the boost station on the spot for circuit breakers, the isolation of the operation of the brake gate. System uses distributed configuration, system function decentralization; to implement the dual bus, real-time network redundancy configuration and control of dual card configuration, further improve the system reliability; LAN (local area network) and optical fiber communication mode is adopted between parts of a system, to ensure the rate of communication and resource sharing. This design is mainly for small thermal power plant design, including the design of primary system, the design of the seco