【作者】 李赫；

【导师】 孙辉；

【作者基本信息】 大连理工大学 ， 电力系统及其自动化， 2009， 硕士

【摘要】 近年来,配电网中整流器、变频调速装置、电弧炉、电气化铁路等负荷不断增加,这些负荷的非线性、冲击性和不平衡性的用电特性,使网络中的电压电流波形发生畸变,并引起电压波动、闪变和三相不平衡等电能质量问题。基于DFACTS的电能质量调节装置作为改善配电网电能质量有效的手段,其研究和应用越来越受到人们的重视。本文在综合国内外有关文献的基础上,综述了DFACTS技术产生的背景、国内外研究现状以及检测和控制技术的发展。提出了一种基于DFACTS的并联混合型电能质量调节装置的结构,结合了有源滤波器和传统无功补偿装置的优点。深入研究了电能质量调节装置的工作原理及关键技术,重点讨论了瞬时无功理论ip-iq检测技术、SVPWM控制技术、电容器同步投切技术。完成了基于DFACTS的并联混合型电能质量调节装置的控制系统的实现,包括控制系统的硬件电路和软件编程。硬件开发有DSP电路、信号采集及AD转换电路、IPM及其辅助电路、同步采样控制电路等,给出了电路原理图并详细论述了各部分电路的功能;控制系统软件编程采用C语言进行程序的开发,给出主要程序的流程图。该部分主要包括信号采集和AD转换部分、瞬时无功理论检测算法和SVPWM控制算法的程序。在上述工作的基础上,研制了基于DFACTS的并联混合型电能质量调节装置的实验样机,确定了主电路元件的参数,并对基于DFACTS的并联混合型电能质量调节装置进行了整体工作实验,实验结果表明该电能质量调节装置抑制谐波和补偿无功的作用十分明显,证明了本文提出的DFACTS并联混合型电能质量调节装置的合理性与实用价值。更多还原

【Abstract】 In recent years,the use of Rectifier,Frequency Control and speed regulating device, Electric Arc Furnace and Electrified Railway Increases unceasingly.The property of these loads,such as nonlinearity,impact and unbalance,makes the utility current and voltage waveform distorted,at the same time cause many power quality problems like voltage fluctuation,flicker and unbalance.As an effectual method to improve the power quality of distribution network,the research on power quality conditioning device which is based on DFACT,is increasingly taken into account.In the thesis,on the base of relevant documents home and abroad,the background of the DFACTS technology,the current research situation and the development of detecting and controlling methods are summarized.The topology structure of a parallel hybrid Power Quality Regulating Device is put forward,which combines the advantages of both APF and traditional VAR compensating devices.The operational principle and key technology are intensively studied,which focus on the instantaneous reactive power theory(especially ip-iq detecting method),SVPWM technology,capacitor synchronous switching technology.The thesis develops the control system of the parallel hybrid Power Quality Regulating Device based on DFACTS,include hardware circuit and software design.Hardware mainly including DSP control circuit,signal acquisition and A/D converting circuit,IPM with its support circuit,synchronous sampling control circuit.The schematic circuit diagram and detailed exposition of the functions of each part are provided.The C language is adopted in the software design,the flow chart of main programs is given,which mainly include signal acquisition and A/D converting part,detecting algorithm based on instantaneous reactive power theory and control algorithm of SVPWM.On the base of above work,the prototype of this Power Quality Regulating Device system is developed,and the element parameters of the main circuit are determined.Then, experiments are done on the experimental equipment of the proposed Power Quality Regulating Device system,and satisfactory results are drawn,which proved the rationality and practical value of the proposed Power Quality Regulating Device.更多还原