【毕业设计（论文）】-发电机变压器组保护设计.docVIP

分类号　　　　　　　　　　　　 毕 业 设 计（论 文） 题　　　　目　发电机变压器组保护设计　　 英文题目　Design of generator-transformer unit protection　　　Abstract With the rapid development of power industry, Chinas power generators, increasing the capacity of a single transformer, the power system is moving in the big units, ultra-high pressure, large power grid direction. Todays large-capacity power plants in China increasing their status in the power system are more important. In order to ensure the safety of the entire power system economic operation, we should plant configuration reliability, sensitivity, selectivity and the liquid of very good protection device. To achieve the optimal configuration should also be taken fully into account the characteristics of large-scale power plants. System described in this article 300MW turbo-generator - transformer unit protection design. This article is divided into four, the first large-scale generators brief - often groups of transformer faults and abnormal operation and configuration requirements of relay protection; second of 300MW generator - transformer unit failure, abnormal operation and non - Principles of electricity and related principles of relay logic diagram introduced; third of 300MW generator - transformer unit of the microprocessor-based protection device of choice and action to introduce acts; fourth of 300MW generator - transformer unit relay configure the main wiring diagram of the introduction and notes. In this paper, the 300MW turbo-generator - transformer design group at the same time to protect a close connection with reality, and user-friendly. Keywords: generator - transformer unit relay 目录 摘要 前言 概述………………………………………………….1 第一章 发变组可能出现的故障及异常运行状态………..1 第二章 发变组保护配置原则及要求……………………..3 第二篇 发变组保护配置……………………………………4 反映短路故障的主保护…………………………..4 第一节 发电机纵差保护………………………………..4 第二节 变压器纵差保护………………………………..8 第三节 发电机匝间短路保护…………………………..9 第四节 转子两点接地保护……………………………15 反映短路故障的后备保护………………………16 第一节 过电流保护……………………………………16 第二节 阻抗保护………………………………………22 反映接地故障的保护……………………………