摘要： 在电力系统与国家社会关系语愈发密切，愈加息息相关的现在，对于电力系统的保护与检修即继电保护这一学科的重要性也越来越大。对于继电保护的研究愈加深入，则对电力系统的保障越大。而相对于有较多将研究经验的负序及零序故障分量方面的继电保护，有关于正序故障分量方面的继电保护研究则较少些。因此本课题提出了一种基于正序故障分量信息的方向保护算法，为求对基于正序故障分量的方向保护算法研究贡献微薄之力。研究过程中使用了PSCAD仿真软件对500kv输电系统模型进行了仿真模拟研究，理论分析和仿真结果表明，该算法能够对各种典型系统故障进行较快速的操作相应，具有一定的可靠性和灵敏性。

关键词： 继电保护；故障分量；正序故障分量；PSCAD仿真模拟

Design and Simulation of directional protection algorithm for positive sequence fault components 

Abstract: The importance of the protection and maintenance of power systems, that is, the protection and maintenance of the power system, is becoming more and more important in the power system and the national social relations. The more in-depth study of relay protection, the greater the protection of the power system. Compared with the negative sequence and zero sequence fault components that have more research experience, there are fewer relaying protection studies on positive sequence fault components. Therefore, a direction protection algorithm based on positive sequence fault component information is proposed, which contributes a little to the research of direction protection algorithm based on positive sequence fault component. The PSCAD simulation software is used to simulate the 500kV transmission system model. The theoretical analysis and simulation results show that the algorithm is able to operate the typical system faults quickly, and has certain reliability and sensitivity.

Keywords: Relay protection; fault component; positive sequence fault component; PSCAD simulation

目录

摘要 i

Abstract i

目录 ii

1引言 1

1.1 课题研究背景 1

1.2 课题意义 3

1.3 课题研究现状 4

2 基本原理 6

2.1 继电保护原理 6

2.1.1 电力系统故障 7

2.1.2 短路故障 8

2.2 故障分量 9

2.2.1 对称分量法 9

2.2.2 故障分量 10

2.3 正序故障分量 12

3 保护算法 14

3.1 算法 14

3.2 电流向量的幅度和相角补偿 15

3.3