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1、：论 文水电站电气主系统初步设计及主系统保护配置1绪论发电厂是电力系统的重要组成部分，是电能的发源地，它是保证给用户可靠供电的前提。电气主接线是发电厂的首要任务，也是构成电力系统的重要环节。电气主接线的拟定直接关系着全厂电气设备的选择，是水电站投资大小的决定因素。在设计过程中，遵照国家现行定力设计规程，方针，秉着电气主接线应具有可靠性、灵活性、经济性的原则，结合设计的实际材料，应用自己所学的知识进行设计。继电保护是能够反映电力系统中电气设备发生故障或不正常运行状态，并动作断路器跳闸或发出信号，减少故障范围，提高电气设备的工作的可靠性。设计中对发电机、变压器、出线回路进行了传统的继电保护配置，以
2、便在设备运行过程中提高其工作性能。由于我的知识水平有限，在设计过程中还存在很多问题，希望大家给于指出。2IntroductionElectricity power plants are an important component of the system is the cradle of power, it is to ensure a reliable supply of electricity to the user premise. Main Electrical Connection is the primary task of power plants, but also con
3、stitute an important part of the power system. The formulation of the main electrical wiring factory with a direct bearing on the choice of electrical equipment is to station the size of the determinants of investment. During the design process, in accordance with the order in force in the country d
4、esign, principles and faith should have the Main Electrical Connection reliability, flexibility, economic principles, combined with the design of the actual materials, the application of their knowledge to design.Relay is able to reflect the electrical equipment in power system failure or abnormal o
5、peration, and circuit breaker tripping or action signal, failure to reduce the scope of the work of electrical equipment to improve reliability. The design of generators, transformers, loop round to the traditional configuration of the relay in order to run the process equipment to improve its perfo
6、rmance.Since my knowledge is limited, during the design process, there are still many problems in the hope that we pointed out. 3目录摘 要 .11 原始资料分析 .31.1 原始资料 .31.2 对原始资料的分析 .32 电气主接线设计 .42.1 主接线的设计原则 .42.2 主接线设计的基本要求 .42.3 发电机侧接线方案比较 .52.3.1 拟选接线方案 .52.4 升高压侧接线方案比较 .72.4.1 升高压侧接线方案比较 .82.4.2 各方案经济比较 .103 主变压器的选择 .113.1 主变台数的确定 .113.2 主变容量的确定 .113.3 主变压器相数的确定 .113.4 主变压器绕组与接线组别的确定 .123.5 调压方式和冷却方式的确定 .124 短路电流的计算 .134.1 短路电流计算的目的 .134.2 短路电流计算条件 .134.3 短路电流的计算 .144.3.1 计算各元件阻抗表幺值 .144.3.2 短路电流计算 .145 电气设备选择 .
