基于联合控制的统一潮流控制器的建模与仿真

发布时间：2018-06-17 11:45

  本文选题：联合控制 + 统一潮流控制器　； 参考：《长沙理工大学》2014年硕士论文

【摘要】：随着电力行业的发展,输电网络的建设规模的增大,输电技术也得到了越来越多的重视。电力系统输送电能过程的稳定与否,电力供给的容量和质量,都在影响着电网未来的发展。统一潮流控制器(UPFC)以其良好的稳定性,不俗的市场潜力和电力系统快速、灵活的调控能力,逐渐被电力电子技术领域所认可,得到了快速发展的机会。统一潮流控制器既能利用补偿器进行独立控制,更重要的是利用其复合性进行联合控制,拥有稳定可靠的控制效果和非常大的可开发空间。论文详细的介绍了统一潮流控制器的研究背景及意义,发展及现状,进而引出了统一潮流控制器的产生及基本构成。论文依据统一潮流控制器的换流器工作原理,构建出联合控制的稳态及暂态模型,为进一步研究统一潮流控制器的联合控制原理提供了理论依据。本文完整的阐述了控制器进行联合调控的工作原理,提出了并联侧、串联侧的控制作用下采取的不同控制策略,对两个换流器采取了不同的双闭环反馈设计。新型的统一潮流控制器利用PI解耦计算器和控制器的作用,对输电系统的参数变化做出迅速响应,发出准确的控制信号指令,提供适当的补偿量,补偿无功功率并稳定线路电压。统一潮流控制器的联合控制作用依赖于两个重要组成部分：静止同步并联补偿器(STATCOM)和串联补偿器(SSSC)。论文参考它们的数学模型以及相关参数的取值,建立了两种补偿器的仿真模块,使统一潮流控制器具有切换控制模式的功能,能实现联合控制作用。论文基于MATLAB,SIMULINK平台,建立统一潮流控制器的仿真模型,来验证功率潮流参数的联合控制作用效果。统一潮流控制器的仿真模型包括检测、控制器、输出运算、系统接入四个部分,由锁相环、测量、电流调节、电压调节、脉冲发生器等子模块构成。论文建立了图形用户界面来设定功率、电压等重要参数的标准值及变化量,并在仿真模型的各节点设置有示波器观测系统参数的波形变化。通过观察仿真图形结果,验证了基于联合控制统一潮流控制器对于系统的无功功率补偿及电压恒定具有稳定、准确的控制效果。
[Abstract]:With the development of power industry and the increase of power transmission network construction scale, more and more attention has been paid to transmission technology. The stability of power transmission process and the capacity and quality of power supply affect the future development of power grid. The unified power flow controller (UPFC), with its good stability, good market potential and fast and flexible control ability of power system, has been recognized by the power electronics technology field and got the opportunity of rapid development. The unified power flow controller can not only make use of compensator to control independently, but also, more importantly, make use of its compound to carry out joint control, which has stable and reliable control effect and very large exploitable space. This paper introduces the research background, significance, development and current situation of unified power flow controller in detail, and then leads to the generation and basic composition of unified power flow controller. According to the working principle of converters of unified power flow controller, the steady and transient models of joint control are constructed in this paper, which provides a theoretical basis for further study on the principle of joint control of unified power flow controller. In this paper, the working principle of the joint control of the controller is described, and the different control strategies under the control of the parallel side and the series side are put forward, and the two converters are designed with different double closed loop feedback. The new unified power flow controller makes use of Pi decoupling calculator and controller to respond quickly to the parameter change of transmission system, send out accurate control signal instruction, and provide appropriate compensation quantity. Compensate reactive power and stabilize line voltage. The joint control function of the unified power flow controller depends on two important components: static synchronous parallel compensator (STATCOM) and series compensator (SSSC). In this paper, the simulation module of two compensators is established with reference to their mathematical models and the values of related parameters. The unified power flow controller has the function of switching the control mode and can realize the joint control function. Based on MATLAB Simulink platform, the simulation model of unified power flow controller is established to verify the joint control effect of power flow parameters. The simulation model of the unified power flow controller consists of four parts: detection, controller, output operation and system access. It is composed of phase-locked loop, measurement, current regulation, voltage regulation, pulse generator and other sub-modules. In this paper, a graphical user interface is established to set up the standard values and variations of important parameters, such as power and voltage, and the waveform changes of the parameters of the oscilloscope observation system are set up at each node of the simulation model. The simulation results show that the unified power flow controller based on joint control has a stable and accurate control effect on reactive power compensation and voltage invariance of the system.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761
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本文编号：2030923