静止同步补偿器的智能控制与应用研究

发布时间：2018-08-31 09:48

【摘要】：近年来,无功补偿技术不断发展,技术日益完善、功能越发全面,应用覆盖面也非常广泛,同时无功补偿技术更加趋于智能化,并且无功补偿装置的体积也越来越小。静止同步补偿器作为功能最为全面的无功补偿装置是研究的重点课题,STATCOM的优点是调节速度更快、谐波少、体积小、调节能力强,这些特点都是其他补偿装置无法比拟的。因此,现在STATCOM是国内外研究的焦点。由于STATCOM属于非线性、多元化系统,在控制策略中时常存在耦合现象,导致控制性能不稳定。同时STATCOM具有时变性,属于动态系统,而常规PI控制参数很难整定,并且PI控制器存在动态响应时间长、过冲大等缺点,严重影响控制精度和鲁棒性。针对这些问题,本文采用瞬时功率控制,并进行相应的解耦,来解决耦合现象,提高控制性能；同时本文设计了模糊PI控制器,不但拥有模糊控制鲁棒性强、适应性强的特点,也兼备了常规PI控制简单的优点。最后通过仿真和实验进行分析,证明STATCOM控制系统的控制性能稳定,完成了预期目标所设定的补偿值。同时本文介绍无功补偿的概况及STATCOM国内外发展现状,分析了STATCOM动态数学模型,并对STATCOM控制系统及模糊控制器进行介绍和设计。最后对实物进行现场数据搜集并进行分析。
[Abstract]:In recent years, the reactive power compensation technology has been developing, the technology is becoming more and more perfect, the function is more comprehensive, the application coverage is also very extensive, at the same time, the reactive power compensation technology tends to be more intelligent, and the volume of the reactive power compensation device is becoming smaller and smaller. As the most comprehensive reactive power compensation device, static synchronous compensator has the advantages of faster regulation speed, less harmonics, smaller volume and better regulating ability, which are unparalleled by other compensators. Therefore, STATCOM is the focus of research at home and abroad. Because STATCOM belongs to nonlinear and multiplex systems, there is often coupling phenomenon in control strategy, which leads to unstable control performance. At the same time, the STATCOM is time-varying and belongs to the dynamic system, but the conventional PI control parameters are difficult to adjust, and the PI controller has the shortcomings of long dynamic response time and overshoot, which seriously affect the control accuracy and robustness. To solve these problems, this paper uses instantaneous power control and decoupling to solve the coupling phenomenon and improve the control performance. At the same time, a fuzzy PI controller is designed, which not only has the characteristics of strong robustness and adaptability of fuzzy control. It also has the advantages of simple control of conventional PI. Finally, through the analysis of simulation and experiment, it is proved that the control performance of the STATCOM control system is stable and the compensation value set by the expected target is achieved. At the same time, this paper introduces the general situation of reactive power compensation and the development of STATCOM at home and abroad, analyzes the dynamic mathematical model of STATCOM, and introduces and designs the STATCOM control system and fuzzy controller. At last, the field data collection and analysis are carried out.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761.12

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