220kV电网输电线路继电保护的整定计算

220kV电网输电线路继电保护的整定计算

文档编号:ZD1412 文档字数:18050,页数:44

文档题目：220kV电网输电线路继电保护整定计算

摘要
整定计算工作在电力系统继电保护中占有很重要的位置，这是因为保护装置的配置及使用正确与否直接关系到系统的安全运行和对用户供电的可靠性，同时还与电网的经济指标、运行调度、设计调试等多方面工作有密切关系。本文详细介绍高压电网继电保护的整定和配置的原则，分析了系统的高频保护、相间距离保护、零序电流保护以及自动重合闸配置。
首先，文档计算出了所给电力系统各元件的参数及序阻抗，并制定各序网图；其次，根据整定计算的要求选择规定的运行方式，确定短路点及短路类型，通过网络的合并、化简求出归算到短路点的各序综合阻抗，根据短路类型及电力系统故障分析的知识，求出短路点的总电流，按照网络结构，求出流过被整定保护装置的短路电流；再其次，基于上述计算结果，计算出各种继电保护装置的整定值，并对各保护进行了灵敏度校验，经过计算分析确定了合理的继电保护方案，绘制了继电保护配置图；最后，编写了整定方案报告书，对整定结果进行了分析、评价，提出了可采取的对策等。

关键词：高频保护，距离保护，零序电流保护，综合重合闸

文档类型：应用研究

Title: Relay Setting Calculation of 220kV Power Transmission Line
ABSTRACT
The calculation plays a great part in the electric power system because the setting and use of protection have something with the security of system, the reliability of uses and have a close relationship with the economic settings, distribute, design of system. The article introduces the protection of EHV electric system and provides distance protection, zero-sequence protection, high frequency protection and automatic equipment.
Firstly, the parameters of the power system components and the sequence impedances were calculated , then impedance diagram was drawn including positive sequence, negative sequence and zero-sequence. Secondly, according to the demands of system, the reasonable way of operation was chosen, then the fault location and how the fault occurs were chosen, the complex impedance by simplifying the networks was calculated. According to the kinds of fault and the knowledge of the faults in system, the full current was got at fault location. Thirdly, According to the construction of network, the current flowing the protected equipment was calculated. Based on the results above , the figures of all kinds of relay protection were calculated and checking whether the sensitive is proper, the reasonable scheme was analysed and the diagram of the setting of relay protection was drawn. Finally, the summary report of the setting calculation results was given, the calculations was evaluated and the available methods was proposed.

KEY WORDS: high frequency protection, distance protection, zero-sequence protection, automatic equipment

TYPE OF THESIS: application

摘要 I
1 绪论 1
1.1 课题的意义 1
1.2 相关技术现状 1
1.3 本文的主要工作 2
2 短路电流计算及运行方式选择 3
2.1电力系统各元件参数计算 3
2.2 序网图制定 5
2.3 短路电流计算 6
3 220kV电网继电保护整定计算及配置方案 15
3.1 电力系统继电保护整定计算的任务和要求 15
3.2 220kV电网继电保护方式的选择原则 15
3.3 初步选择保护及重合闸方案 16
3.4 220kV电网继电保护整定计算 17
3.4.1 相间距离保护的整定计算 17
3.4.2 零序电流方向保护的整定计算 24
3.4.3 高频保护的整定计算 29
4 综合重合闸装置 34
4.1综合重合闸与继电保护的联接配合 34
4.2 综合重合闸的整定计算 35
5 结论 38
致谢 39
参考文献 40

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