计及换流器间动态交互的中压直流配电系统控制参数设计  

Control Parameter Design of Medium-voltage DC Distribution System Considering Dynamic Interaction Between Converters

作　　者：朱琳[1,2] 赵学深 郭力 李霞林[1,2] 邓占锋 王成山[1,2] ZHU Lin;ZHAO Xueshen;GUO Li;LI Xialin;DENG Zhanfeng;WANG Chengshan(Key Laboratory of the Ministry of Education on Smart Power Grids(Tianjin University),Tianjin 300072,China;Key Laboratory of Smart Energy&Information Technology of Tianjin Municipality,Tianjin 300072,China;State Grid Global Energy Interconnection Research Institute,Beijing 102209,China)

机构地区：[1]智能电网教育部重点实验室(天津大学),天津市300072 [2]天津市智慧能源与信息技术重点实验室,天津市300072 [3]全球能源互联网研究院有限公司,北京市102209

出　　处：《电力系统自动化》2022年第3期121-128,共8页Automation of Electric Power Systems

基　　金：国家重点研发计划资助项目(2020YFB1506800);中国博士后科学基金面上资助项目(2021M692378)。

摘　　要：由于各换流器间存在动态交互作用,使得中压直流(MVDC)配电系统的控制参数设计比单台换流器时困难得多。首先,针对系统中换流器的电流控制环、电压控制环和下垂控制环,依次分别建立了计及换流器间动态交互的开环和闭环传递函数,并且所建传递函数零极点的个数与单台换流器独立运行时完全一致。然后,提出了一种计及换流器间动态交互的MVDC配电系统控制参数设计方法,该方法能够从系统动态稳定性的角度定性定量设计控制参数。该设计方法通过部分零极点的相互抵消,利用一对共轭主导极点准确设计系统动态特性,并在较宽频率范围(如10~50 Hz)内均有效。最后,在电力电子仿真软件PLECS中对所提传递函数和控制参数设计方法进行了仿真验证。Due to the dynamic interaction between converters,the design of control parameters of medium-voltage DC(MVDC)distribution systems is much more complicated than that of single converter.First,for the current control loop,the voltage control loop and droop control loop of the converters in the system,the open-loop and closed-loop transfer functions considering the dynamic interaction between the converters are established respectively.In addition,the number of poles(or zeros)of the transfer function considering the dynamic interaction between converters is consistent with the single-converter situation.Then,a control parameter design method for the MVDC distribution system considering the dynamic interaction between converters is proposed.In this design method,the control parameters of all converters are designed qualitatively and quantitatively from the perspective of system dynamic stability.Through the mutual cancellation of some zeros and poles,the dynamic characteristics of the system can be designed by this method with a pair of conjugate poles.Moreover,this design method is effective in a wide oscillation frequency range(for example 10~50 Hz).Finally,the proposed transfer function and control parameter design method are simulated and verified in the power electronics simulation software PLECS.

关 键 词：中压直流配电系统 动态交互 控制参数设计 开环传递函数 闭环传递函数 

分 类 号：TM721.1[电气工程—电力系统及自动化]