基于双机—无穷大系统的进相运行研究
首发时间:2010-05-05
摘要:发电机进相运行是解决系统电压偏高的有效手段。本文首次采用双机-无穷大系统对进相运行做了研究,减少了简化假设,所采用模型符合系统中大型火电厂进相运行的实际情况。详细讨论了进相运行过程中机组相互间的复杂影响。基于简化潮流分析,比较了以无功为控制目标和以机端电压为控制目标的控制策略,并在MATLAB/simulink平台上自行开发了研究工具,即自动跟踪无功目标值辅助控制模块,对无功功率的有效控制手段进行了模拟,实现了机组间无功功率的合理分配。推导了含有辅助控制模块的励磁—发电机系统线性化的状态方程,为深入研究上述的改进控制策略提供了基础。以双机—无穷大系统进相运行的仿真验证了改进的励磁策略的优越性。
关键词: 双机-无穷大系统 进相运行 电压调节 机组相互影响 附加励磁控制 MATLAB/simulink平台
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Research of Leading Phase Operation Based on Double- Generator-Infinite Bus Power Systems
Abstract:Leading phase operation is an effective method to solve the higher voltage than normal. The model of Double- Generator-Infinite Bus Power Systems is used in this paper for researching Leading phase operation of generators. The model is more similar to the practice of leading phase operation in huge power plants. The intercource between the generators is well considered.The different control method of exitation systems are compared based on simple power flow analysises. An improved additional controller is designed for trailing the refering value of reactive power based on MATLAB/simulink softwares, and the reactive power is distributed to the generators reasonsbly. The linear state function of the system composed by the exiter and generator containing the additional controller is researched. Simulating based on a Double- Generator-Infinite Bus Power System shows that the the voltage is well regulated by the improved exiting controller.
Keywords: Double- Generator-Infinite Bus Power System Leading Phase Operation intercouse of generators additional exitation controller MATLAB/simulink
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