Integrated power system excitation control design
of experiment Abstract
The development of modern power system, synchronous generator excitation control on a normal circumstances, the total load is constantly changing. And different load capacity and load of different power factor, synchronous generator excitation field on the reflection of the role is different, to maintain the synchronous generator terminal voltage to a certain level, it must be based on load size and the nature of the load regulation at any time synchronization power generator. In various power plant, synchronous generator excitation system is to ensure that work to improve the level of power and stability of key equipment. Synchronous generator excitation control in power quality assurance, rational allocation of reactive power and improve reliability of power system operations and play an important role.
This paper mainly controlled experimental excitation power system design, first generation system as a controllable excitation profile and the related power system excitation control of the future development of the situation at the controlled excitation system overexcited restrictions were analyzed, and design-related characteristics of an overexcited limit test, the system understanding.
Keywords：power system；excitation control system；overexcited limit
目录
摘要 ...................................................................................................................... I Abstract ............................................................................................................. Ⅱ
第1章 绪论 ........................................................................................................ 1 1.1 发电机励磁控制系统简介 ....................................................................... 1 1.2励磁控制系统的作用 ................................................................................ 2 1.2.1维持发电机端电压在给定水平 ....................................................... 2 1.2.2提高电力系统的静态稳定性 ........................................................... 2 1.2.3改善电力系统的暂态稳定性 ........................................................... 3 1.2.4改善电力系统的动态稳定性 ........................................................... 4 1.2.5在并列运行的发电机间合理分配无功功率 ................................... 5 1.3自动励磁调节器的组成及功能 ............................................................... 5 1.3.1基本工作电路 ................................................................................... 5 1.3.2辅助工作电路 ................................................................................... 5 1.4同步发电机励磁控制方式研究现状 ....................................................... 6 1.4.1基于单变量控制方式 ....................................................................... 6 1.4.2基于现代控制理论的多变量控制方式 ........................................... 6 1.4.3非线性多变量励磁控制方式 ........................................................... 8 1.4.4智能控制方法 ................................................................................... 9 1.5国外研究及发展状况 ............................................................................. 10 第2章 励磁系统的过励限制 .......................................................................... 13 2.1 过励限制的主要特性 ............................................................................. 13 2.2限制过程 ................................................................................................. 13 2.3级差 .......................................................................................................... 14 2.4以励磁机磁场电流作为过励限制控制量的过励限制整定 ................. 15 2.5无发电机转子过负荷保护的处理 ......................................................... 15 2.6过热量的释放和再次过励的条件 ......................................................... 15 2.7过励保护 .................................................................................................. 16 2.7.1顶值电流保护 ................................................................................. 16 2.7.2过励反时限保护 ............................................................................. 16 2.7.3过励报警信号 ................................................................................. 16 第3章 可控励磁发电系统实验装置操作及维护 .......................................... 17 3.1 实验装置操作说明 ................................................................................. 17 3.2实验的基本要求 ..................................................................................... 18
3.3可控励磁发电系统操作运行及检测维护 .............................................. 19 3.3.1可控励磁自动调节系统的投入运行的操作步骤 ......................... 19 3.3.2自动—手动控制切换操作要点 ..................................................... 20 3.3.3可控励磁自动调节系统的正常运行要点 ..................................... 20 3.3.4励磁调节装置的退出及停机操作要点 ......................................... 21 3.3.5可控励磁自动调节装置的检查与维护 ......................................... 22 3.4控励磁发电系统常见故障及处理方法 .................................................. 23 3.4.1灭磁开关QFG的常见故障及处理方法 ...................................... 23 3.4.2调试中常见故障及处理方法 ......................................................... 23 3.4.3起励中常见故障及处理 ................................................................. 24 3.4.4空载运行中的常见故障及处理方法 ............................................. 26 3.4.5负载运行中的常见故障及处理方法 ............................................. 26 第4章 过励限制特性实验 .............................................................................. 30 4.1可控励磁发电系统过励限制电路原理及其工作特性 ......................... 30 4.2实验设备 .................................................................................................. 31 4.3实验内容与步骤 ..................................................................................... 32 结论 .................................................................................................................... 35 致谢 .................................................................................................................... 36 参考文献 ............................................................................................................ 37 附 录A .......................................................................................................... 38 附 录B .......................................................................................................... 47