论文首先征对同步发电机并网的条件做了理论方面的分析，给出了不同并网条件下的滑差电压波形。然后利用MATLAB搭建了一个单机-无穷大的仿真模型，给出了同步发电机并网过程中如果存在频差或电压差时的定子电流、转速、励磁电压等波形，通过波形分析了频差、压差大小对并列的影响。 作者在课题设计过程中，具有一定的分析和解决问题的能力，独立性较强。设计方案比较合理，研究结果正确。 设计说明书格式比较规范，较好地完成了设计任务。 同意论文提交答辩。65208

并网是发电机投入系统运行的首要环节，成功与否直接影响系统稳定与发电机安全，发电机并网要求满足准同期条件，要求快速、准确，快速能够减少发电机的空载损耗，准确可以保障安全，所以为保证发电机能够安全、快捷、稳定投入运行发电，并网这一短暂过程的变化特点需要关注和重点研究。现在，除了少数小型发电厂仍然采用手动方式，大多数都是借助专用仪器——同期装置来完成发电机的并网的。随着计算机工业的发展和数字技术的迅猛进步，研制使用能够自动实现发电机并网的智能仪器已成为发电厂技术革新和自动化改造的重要课题。

首先本文研究了发电机并网过程中各条件对滑差影响，其次根据发电机并网的等效电路，建立了基于MATLAB/Simulink环境下的单机无穷大并网模型，对并网过程中的有关频率、相位、电压的变化对并网滑差产生的影响以波形图形式展现。

毕业论文关键词  MATLAB/Simulink   同步发电机 准同期并网

毕业设计说明书（论文）外文摘要

Title   Simulation and Analysis of Synchronous Generators Parallel                   

Abstract

For parallel in is the primary link for generator to be brought into operation, either success or failure of parallel in will have great influence on system reliability and security. The generator parallel need to meet the requirements of quasi-synchronization condition, fast, accurate, rapidity can reduce the no-load loss, accuracy can guarantee the safety. In order to ensure that High-voltage generator can be paralleled in the grid safely, efficiently, and stably, the variation rule of transient parallel in process need be paid greatly attention and researched on. Now, except a few small power plants that have still use the method of parallel connection by hand．the most use one by the special instrument——the Quasi Corresponding-period equipment．With the rapid development of computer industry and digital technique, developing and applying the intellective instrument that can realize automatic parallel

connection of the generator，has become all important task in the technical revolution and automatic innovation of power plants.

Firstly, parallel in conditions of synchronous generators are studied in the paper, whose influence on the slippery difference voltage are analyzed. Second, MATLAB/Simulink is used as simulation analysis tool for studying the dynamic behavior of generator parallel in according to the equivalent circuit, and the difference can be obviously shown in the oscillogram.

Keywords  MATLAB/Simulink synchronous generator  Quasi-synchronization

目   次

1  绪论  1

1.1  课题背景及研究意义 1

1.1.1  课题背景1

1.1.2  研究意义2

1.2  并网问题的研究现状3

1.3  本文主要工作3

2  同步发电机并网条件分析 5

2.1  并网的理想条件  5

2.2  频率差对滑差的影响 6

2.3  电压差对滑差的影响 8