华能北京热电厂高压变频工程设计应用研究-电气工程专业论文.docxVIP

华北电力大学11：程硕士专业学位论文摘 华北电力大学11：程硕士专业学位论文 摘 要 随着国家整体节能减排战略的推进，电力系统节能减排面临的形势非常严峻，如何 将发电厂这个发电企业，同时也是用电大户的节能减排工作有效丌展，合理选择并应用 目前的多项节能新科技，取得一定社会效益和经济效益，是每个发电厂都在探索的问题。 本文在查阅、收集大量资料的基础上，结合研究人员自身的长期现场工程实践经验， 以华能北京热电厂增压风机高压变频改造的具体工程为例，对目前主要的高压变频器技 术进行了探讨，确定了电厂增压风机高压变频调速改造的设备选型，在生产厂家提供的 变频设备技术图纸基础上，进行了变频改造项目的工程设计，包括一次系统接线设计、 变频器与机组DES接口设计、变频器PLC逻辑设计、变频系统继电保护配置设计、DES 系统增压风机控制策略设计等设计工作。 本文还对高压变频器的继电保护配置设计与定值整定进行研究，提出了较为合理的 变频器保护配置方式。同时对高压变频器的接地问题进行了着重研究，通过理论分析及 现场试验，归纳总结出相关规律，并提出了接地保护的合理设计与配置。 论文最后对增压风机变频改造后的经济效益进行了相关分析。 关键词：高压变频，脱硫增压风机，工程设计，微机保护，单相接地 ABSTRACT As the Energy-Saving and Pollutant Emission Reduction Strategy goes further,the power system is facing a severe situation on this subject．It is now a widely explored theme to choose and apply the exiting new techniques in the energy—saving and emission reducing task of the power plant which is a power generator and also弱a large consumer of electric power with the aim of social and economic benefits． This thesis is based on ample data and combined with the researchers’practical experiences of the real works．Taking the example of improving project of booster fan’S high voltage inverters of the Beijing thermal power plant of CL ING,the main techniques of the high voltage converters are discussed．And we have settled the equipments choosing problem of such projects．With the access of the blueprints of the equipments?the designing of the projeet，including designing of wire topology of the primary system，the DSC interface between the converter and the equipment，the converter’S PLC logics，converting system’S relay protection and booster fan’S controlling strategy in the DCS system，is finished． The focus point of the thesis is the research of the configuration designing and setting of the relay protection of the high voltage inverters，and the optimal protection configuration is I given given here．Meanwhile，earthing problem of the high voltage converter is emphasized and the designing and configuration of earthing protection al e pre