【作者】 蒋建文；

【导师】 周林；

【作者基本信息】 重庆大学 ， 电力电子与电力传动， 2002， 硕士

【摘要】 本文结合导师的研究课题，在分析静止无功发生器的研究现状的基础上，对ASVG的主电路结构、电流检测系统和控制方法进行了总结和研究，首次提出将一种非线性控制法-单周控制法应用于ASVG。运用单周控制的静止无功发生器具有较高的理论价值和广泛的实际应用价值。本文的主要内容如下：根据电力系统不对称运行原理，本文研究静止无功发生器的主电路结构和减小或抑制基波负序零序和谐波电流的机理，以实现电力系统的稳定运行。根据现有文献对静止无功发生器的主电路结构、各种有害电流检测方式和控制方式进行了分析、比较和总结。并详细分析和讨论各种方法的基本原理，应用特点和不足。在详细介绍单周控制原理的基础上，分析其特点，探讨了将其应用于ASVG的方法。在对应用单周控制的静止无功发生器建立数学模型的基础上，分析使直流侧电压波动和使两电容电压不平衡的原因，结合单周控制法，提出了一种有效、简单的解决办法。最后，在详细的数学模型基础上对应用单周控制的静止无功发生器进行仿真研究。仿真结果表明，本文提出的静止无功发生器不仅具有补偿谐波、无功，平衡负载等多种功能，还能有效抑制直流侧电压波动，平衡电容电压。更多还原

【Abstract】 On the basis of the research project of my tutor and the analysis of existing principles of advanced static var generator, this dissertation，for the first time, proposes an ASVG with a nonlinear control method - one-cycle control, after the study of ASVG’s main circuit、present detection system and control methods. The ASVG has highly theoretical and practical values. The main contents in this dissertation are as follows:According to the theory of asymmetry operation, this dissertation has a research on the principle of ASVG’s main circuit, eliminating the fundamental negative, zero sequence and harmonic current so as to realize operation in stabilization.After the summarization of present literatures, analyses and comparisons are made on the ASVG’s main circuit, present detection system and control methods. This dissertation present the principles, characteristics and deficiencies of every scheme.The principle of one-cycle control is introduced in detail, its characteristics is analyzed. The method to combine it with ASVG is discussed. On the basis of the mathematic model of ASVG with one-cycle control, the reason that arouse the voltage fluctuation on dc side and imbalance of capacitances’ voltage is found out. A simple and efficacious method is proposed according to one-cycle control.In the end, simulations are carried out by the mathematic model of ASVG with one-cycle control. The simulating results indicate the ASVG put forward in the dissertation can not only fulfill the multifunction such as compensating harmonics、reactive power、balancing the loads and so on, but also suppresses the voltage fluctuation on dc side and balance of capacitances’ voltage.更多还原