【作者】 孙晓娟；

【导师】 杨晓萍；

【作者基本信息】 西安理工大学 ， 水利水电工程， 2004， 硕士

【摘要】 无功补偿是维持现代电力系统稳定与经济运行所必需的，新型静止无功发生器(STATCOM)经过二十多年的发展，已成为静止无功补偿技术的发展方向，是今后柔性交流输电系统的一种重要的无功补偿装置。 本文论述了STATCOM的发展概况，研究了STATCOM的工作原理，分析了瞬时无功功率在STATCOM控制系统中的应用，并在此基础上建立了STATCOM的稳态模型和动态模型。根据电力系统变参数、非线性以及对控制要求多目标的特点，本文针对维持系统节点电压、阻尼系统振荡、提高系统暂态稳定性能等不同控制目标分别设计了控制器，然后将模糊逻辑和多状态线性反馈相结合，提出了一种能满足电力系统多目标要求的控制方法，并用该控制方法为STATCOM设计了控制器。以单机无穷大系统为例进行仿真的结果证明了所设计多目标控制方法优于PI控制方法，使STATCOM在任何状态下均能充分发挥其控制效果。最后，本文给出了采用DSP芯片实现的控制器设计方案。控制器采用TMS320F240芯片实现电量采样和完成控制算法，它与脉冲发生器的数据交换是通过双口RAM完成的，从而实现了无功补偿装置真正意义上的全数字化控制方案。更多还原

【Abstract】 Var compensation is necessary in maintaining stability and economy of modern power system. It has been more than twenty years since Static Synchronous Compensator was developed. STATCOM is an important Var compensator applied in Flexible AC Transmission System (FACTS) and it is the direction in static Var compensator technology.This paper summarizes the development of STATCOM, studies its principle and analyzes the application of the instantaneous reactive power in STATCOM. By theoretical analysis, the steady model and the dynamic model for STATCOM are deduced. A novel strategy combined the Fuzzy Logic of linear multivariable feedback control to design a controller of STATCOM to meet the multi-objective demands of power systems is also proposed in this dissertation, and the controller is designed with this strategy, because of variational element, nonlinearity and multi-objective controlling demands of STATCOM, this paper designs the controller respectively aimed at continuous linear control for voltage maintaining, oscillation damping, improving the transient stability . Results of Simulation based on a single machine to infinite bus system show that the controller has better performance than traditional PI controller in the power system, and makes STATCOM exert its control effect sufficiently under any circumstance.Finally, the controller based on DSP (TMS320F240) is designed in this dissertation, and the communication between the controller and the pulse generator was achieved with dual-port RAM, so the control strategy of total digitization is realized really.更多还原