【作者】 邓科；

【导师】 王惠中；

【作者基本信息】 兰州理工大学 ， 电力电子与电力传动， 2008， 硕士

【摘要】 PSS(电力系统稳定器)是目前已经被证实的最有效的阻尼低频振荡的手段,也是国际大电网会议推荐的首选措施。随着电网规模的不断扩大,低频振荡的发生也越来越多,于是各国纷纷在电网中大量投入PSS装置,以抑制低频振荡、加强系统阻尼、提高电网的动态稳定性。发电机励磁控制系统对电力系统的静态稳定、动态稳定和暂态稳定性都有显著的影响。在电力系统稳定计算中采用不同的励磁系统模型和参数,其计算结果会产生较大的差异。因此需要能正确反映实际运行设备运行状态的数学模型和参数,使得计算结果真实可靠。随着我国电力系统全国联网和西电东送工程的实施,对电力系统稳定计算提出了更高的要求。新的稳定导则要求发电机采用精确模型,也要求在计算中采用实际的励磁系统模型和参数。本文结合“兰西热电厂9号发电机PSS参数设计、现场试验”的课题深入PSS对电力系统低频振荡上的应用研究,对励磁系统模型参数辨识、PSS参数设计、试验方法和分析计算进行了深入研究与实践,并通过现场试验再次优化、校正参数的方法在PSS的参数整定取得了显著的效果。这是结合了甘肃省电力系统分析.进行PSS设计的火电机组,具有重要的现实意义和推广应用价值。更多还原

【Abstract】 Now PSS(Power System Stabilizer)has been proved the most effective means to damp LFO(Low Frequency Oscillation)what also is the preferred measure recom -mended by the international Power Grid meeting,with the continuous expansion of Power Grid,LFO occurs more and more,so every country have put in the PSS device to strengthen system damp for damping LFO and to improve the dynamic stability of Power Grid.Excitation control system of generator has significant impact on stability of the static and dynamic and transient of the Power System.Due to we adopt the different models and parameters,so the calculation results of the Power Sytem will have much difference.Therefore,it needs mathematical models and parameters what can reflect the actual operation state of the equipment and can make the results reliable.As network of our Power System and project of "transmits electricity from west to east" implemented,it is put forward the higher claims to calculate the stability of Power System.New stabilization guidelines require using precise generator models and actual excitation system models and parameters in the calculation.In the paper,combining with the subject "PSS parameters design and field test of 9th generator in LanXi heating and Power Plant",the author has deep research of PSS on damping LFO,the parameter identification to excitation system,test methods, analysis calculation,so it achieves remarkable results through optimization field test again,calibrate parameters of the PSS in the tuning parameters.Combining with the thermal generator set of the Gansu Power System,the paper has the popularize value and real-life significance.更多还原