发电机继电保护的设计毕业论文_精品.docVIP

摘 要 本论文主要对积石峡水电站进行电气一次及微机保护设计。积石峡水电站的总装机功率为4×250=1000MW，共四回330KV出线与系统相连。 电气一次部分，首先是根据所给出的原始资料拟定三种电气主接线方案。然后对这三种方案进行可靠性、灵活性和经济性比较后，保留一种较合理的方案，对这种方案进行短路电流计算；接着是根据短路电流计算结果进行主要电气设备的选型以及校验，包括断路器、隔离开关、母线、互感器等；最后再由经济性比较确定最终的电气主接线方案。同时设计厂用电方案与画出配电装置的布置图。 发电机继电保护的设计是对4组发电机变压器组与母线进行保护类型的配置，保护的整定计算及校验。论文还附有7张AutoCAD的图纸加以说明。包括电气主接线图、厂用电接线图、室外配电装置图、发电机变压器组保护的原理接线图、展开图、母线的保护原理图、展开图。 毕业设计的过程是一次将理论与实际相结合的过程，通过这次比较系统全面的进行设计之后，巩固和增强了电力系统学科主干课程的理解，树立了工程设计的观念，提高了电力系统设计的能力。 关键词：电气主接线，短路电流计算，设备选型，微机保护 ? ? ABSTRACT This thesis focuses on the electrical Jishixia a station and the design of microprocessor-based protection. The total power of JI SHI XIA hydro power station is 4×250MW=1000MW,connecting to system with 4 outline. For electric primary system, firstly draw up 3 drafts of main connection lines according to the firsthand information and datum. Then compare the 3 drafts from these aspects such as reliability, flexibility and economy, and keep one more reasonable plans than others. The short circuit current calculation is carried on. And main electric equipments including circuit breakers、disconnectors、bus、insulatoretc are choosed according to the result of short circuit current calculation. Finally the economy of the plan is compared and main electrical connection plan is determined. Protection contains choosing the protection style of the 4 generator, setting calculation as well as the verification and confirm relay style. The dissertation attach to 7 AutoCAD drawings including the main electric connection, outdoor distribution equipment setting, the relay protection of generator ,the decoration of protection scream. The process of the graduation design is a process of combining the theory with practice. The comprehensive and system training is helpful to enhance and consolidate the understanding and application of the branch curriculum of the electric subject, to set up the project idea and to improve the ability of the electrical system design. KEY WORDS: main electrical con