The utility model discloses a steam and electricity dual drive and frequency conversion power generation system based on induced draft fan, which comprises an induced draft fan, a small steam turbine, an electric motor, a gear box, a clutch, a power plant system, a multi frequency power source device, a load and so on. System power source load by the small turbine and gearbox and clutch and motor and fan and multi frequency power source device and all constitute a complete set of power system and multi frequency output, suitable for generating units in power grid tariff, high energy consumption, can be introduced into the drag source case. With the transformation of the system, without redundant electric start fan; start by the adjacent machine auxiliary steam to drive a small turbine or electric motor and multi frequency power source device; the normal operation of turbine driven fan, multi frequency power source device in inverter power generation mode, with different load by multi frequency power source device a frequency output. In order to save the investment of equipment and improve the reserve of the power source, the efficient operation of the auxiliary equipment in the whole plant is realized, and the operation economy can be improved to the maximum limit.
【技术实现步骤摘要】
基于引风机汽电双驱及变频发电的系统
本技术属于火电厂节能降耗领域,涉及一种基于引风机汽电双驱及变频发电的系统。
技术介绍
当前电力形势总体供大于需,加之新能源如风电、光伏光热、核电的迅猛发展,火电机组年利用小时数呈逐年下降趋势,部分电厂已着手进行灵活性改造以提高调峰能力。设置高压变频器、永磁调速器或电驱改汽驱以实现变速调节,提高辅机设备在中低负荷的运行效率,有效节约辅机电耗,但仍存在以下缺点,制约机组整体经济性。1)高压变频器对环境要求较高,需单独设置变频室,配置相应的冷却系统。火电厂主要辅机设备有锅炉给水泵、凝结水泵、循环水泵、三大风机等,若均改为高压变频器调速,需设置多个变频室及冷却系统,占地面积大,维护工作量大。2)小汽轮机驱动方案,除小机本体外,需同步配置进汽系统、排汽冷端系统、凝结水系统、抽真空系统(若为纯凝式小汽轮机)、轴封系统等,系统管路复杂;小汽轮机设计点按照给水泵/引风机TB工况选型,其高效点在BMCR工况点附近,中低负荷时小汽轮机运行效率下降很快,经济性降低;对于给水泵、引风机等涉及机组启动的小汽轮机驱动,需同步配置电动启动引风机、电动 ...
【技术保护点】
基于引风机汽电双驱及变频发电的系统,其特征在于,小汽轮机(1)通过齿轮箱(2)和离合器(3)与电动机(4)同轴连接,小汽轮机汽源由主汽轮机四级抽汽或锅炉抽汽提供;电动机(4)另一端通过联轴器(5)与引风机(6)同轴连接,电动机(4)经多频动力源装置(7)与机组厂用电系统(8)连接。
【技术特征摘要】
1.基于引风机汽电双驱及变频发电的系统,其特征在于,小汽轮机(1)通过齿轮箱(2)和离合器(3)与电动机(4)同轴连接,小汽轮机汽源由主汽轮机四级抽汽或锅炉抽汽提供;电动机(4)另一端通过联轴器(5)与引风机(6)同轴连接,电动机(4)经多频动力源装置(7)与机组厂用电系统(8)连接。2.根据权利要求1所述的基...
【专利技术属性】
技术研发人员:吕凯,马汀山,兀鹏越,万超,许朋江,程东涛,
申请(专利权)人:西安西热节能技术有限公司,
类型:新型
国别省市:陕西,61
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