—火力发电厂电气部分设计.docx

摘要随着我国经济的不断发展，对电的需求也越来越大。电力工业是我国经济发展中最为重要的一种能源，主要是它可以方便、高效地转换其它能源形式。电力工业作为一种先进的生产力，是国民经济发展中最重要的基础能源产业。而火力发电是电力工业发展中的主力军。截止2006年底，火电发电量达到48405万千瓦，约占总容量的77.82%。由此可见，火力发电在我国这个发展中国家的国民经济中的重要性。本次设计是针对2*300MW火力发电厂电气部分的设计，电气主接线是发电厂、变电站电气设计的首要部分，也是构成电力系统的主要环节。所以本次设计电气部分主接线方案为一台半断路器接线。该设计主要从理论上在电气主接线设计、短路电流计算、电气设备的选择、配电装置的布局、防雷设计、发电机、变压器和母线的继电保护等方面做详尽的论述，同时，在保证设计可靠性的前提下，还要兼顾经济型和灵活性，通过计算论证火电厂实际设计的合理性与经济型。采用软件绘制电气图和查阅相关书籍，进一步完善了设计。关键词：电气主接线；短路电流；配电装置；电气设备选择AbstractAs Chinas economic development，the demand for electricity is growing。Electric power industry in Chinas economic development is one of the most important energy，mainly it can be easily and efficiently convert other forms of energy。As an advanced productivity in the electrical industry，is the most important foundation in the development of energy industry of the national economy。Thermal power is the main force in the development of the electric power industry。By the end of 2006, thermal power generating capacity reached 484.05 million-kilowatt，77.82% per cent of total capacity。Thus，thermal power generation in China，the importance of developing the national economy。This design is designed for electrical parts of the 2*300MW thermal power plant，main electrical connection is the primary part of the electric design of power plant and substation，constitute the main part of power system。Design of main electrical connection scheme for one and a half circuit breaker connection。The design theory in the design of main electrical wiring，electrical equipment for short-circuit current calculations，selection and distribution equipment for lightning protection design，layouts，generators，transformers and relay protection of Busbar in elaborate on these，at the same time，ensure the reliability design of premise，also consider economic and flexibility through calculations justify the actual design of thermal power plant and cheap。Draw electrical diagrams software and check out books，further improved the design。Key words：main electrical wir