本文在研究以发变组为主的电力系统元件保护整定计算技术发展及现状的基础上

Based on the research on the development and current situation of the power system component protection setting calculation technology based on generators and transformers, combined with the setting work of a power station, this paper focuses on the analysis and calculation of the generator transformer fault and the main protection setting calculation method. , Put forward some general design ideas about the protection setting calculation software of generator-transformer group, and studied the protection program of power system components to realize the software. Simulation was carried out by MATLAB software, and the simulation results demonstrated the feasibility and effectiveness of the program. <br>The main content and specific chapter arrangements are as follows: <br>Chapter 1 introduces in detail the background, purpose and significance of the power system component relay protection setting calculation research work based on generators and transformers, and analyzes the development of relevant setting software at home and abroad. The current situation and the advantages and disadvantages of the main software. <br>Chapter 2 first explains some basic methods and basic theories of power system relay protection setting. Power system relay protection setting provides necessary calculation basis for power system component protection. <br>Chapter 3 elaborates on the principle and method of short circuit calculation of power system components based on generator-transformer units. Starting from the structural characteristics of the generator, it focuses on the analysis of the equivalent circuit modeling, simulation and transient short circuit of the generator's internal short circuit. The calculation method of current and the establishment of equivalent circuit model of transformer. <br>Chapter 4 introduces the principles and methods of generator-transformer group protection configuration, and analyzes the protection setting methods of generators and transformers respectively. <br>Chapter 5 first explains the functions that the setting calculation software should have and the general steps of the generator-transformer group relay protection calculation. Then use C++ to write a simple program based on the power system protection setting, and simulate and analyze the simulation results through MATLAB.

Based on the development and current situation of power system component protection and calculation technology based on the transmission group, combined with the adjustment work of a power station, this paper focuses on the analysis and calculation of the fault analysis and calculation method of the generator transformer and the main protection, puts forward some general design ideas about the power system protection and calculation software of the variable group, and studies the power system component protection program to realize the software. The feasibility and effectiveness of the program are demonstrated by the simulation of MATLAB software.<br>Its main contents and specific chapters are arranged as follows:<br> Chapter 1 introduces in detail the background of the research work on the calculation of relay protection and adjustment of power system components, which is mainly based on the generator transformer group, as well as the purpose and significance, and analyzes the development status of relevant adjustment software at home and abroad and the advantages and disadvantages of the main software.<br>Chapter 2 first expounds some basic methods and theories of power system relay protection, and provides the necessary calculation basis for power system relay protection. <br>Chapter 3 elaborates the principles and methods of short-circuit calculation of power system components based on the variable group, starting from the structural characteristics of the generator, and focuses on the analysis of the modeling, simulation and calculation of the temporary short-circuit current inside the generator, as well as the establishment of the equivalent circuit model of the transformer.<br> Chapter 4 introduces the principles and methods of generator transformer group protection configuration, and analyzes the protection and adjustment methods of generators and transformers respectively.<br> Chapter 5 first describes the function of the set-up calculation software and the general step process of the variable group relay protection calculation. Then, a simple program based on power system protection and consolidation is written, and the simulation results are analyzed by MATLAB.

本文在研究以发变组为主的电力系统元件保护整定计算技术发展及现状的基础上，结合某电站的整定工作，重点对发电机变压器的故障分析计算及主要保护的整定计算方法进行了分析，提出了一些关于发变组保护整定计算软件的总体设计思想，并研究了实现该软件的电力系统元件保护程序。通过MATLAB软件进行仿真，仿真结果论证了该程序的可行性和有效性。其主要内容和具体章节安排如下： 第1章详细介绍了以发电机变压器组为主的电力系统元件继电保护整定计算研究工作的背景，以及目的及意义，分析了国内外相关整定软件的发展现状及主要软件的优缺点。第2章首先阐述了电力系统继电保护整定的一些基本方法和基本理论，电力系统继电保护整定为电力系统元件保护提供必要的计算依据。 第3章详细阐述了以发变组为主的电力系统元件短路计算的原理和方法，从发电机的结构特点出发，重点分析了发电机内部短路的等效电路建模、仿真及暂态短路电流的计算方法，以及变压器的等效电路模型的建立。 第4章介绍了发电机变压器组保护配置原则和方法，分别分析了发电机和变压器的保护整定方法。 第5章首先阐述了整定计算软件应具备的功能及发变组继电保护计算的一般步骤流程。然后利用C++，编写了基于电力系统保护整定的一个简单程序，并通过MATLAB进行仿真及对仿真结果进行分析。<br>