直流配电系统虚拟惯性控制阻尼增强特性分析及参数设计  

Characteristic Analysis and Parameter Design of Damping Enhancement for Virtual Inertia Control of DC Distribution System

作　　者：赵文梦 陈鹏伟 许昭[2] 陈新[1] 陈杰[1] ZHAO Wenmeng;CHEN Pengwei;XU Zhao;CHEN Xin;CHEN Jie(College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;Department of Electrical and Electronic Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China)

机构地区：[1]南京航空航天大学自动化学院,江苏省南京市211106 [2]香港理工大学电机与电子工程学系,香港999077

出　　处：《电力系统自动化》2024年第23期136-144,共9页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(U2141227);香江学者计划资助项目(XJ2022030);台达电力电子科教发展计划资助项目(DREG2022002)。

摘　　要：为说明直流配电系统附加虚拟惯性控制对系统阻尼的影响机理并实现合理配置,首先从模拟电容的物理概念出发,基于直流网络二端口等效,解释了负载侧并联电容对系统惯性-阻尼的同步增强作用及与源侧并联电容的差异性。其次,针对面向负载供电的定功率和定交流电压控制电压源变换器(VSC),在推导附加虚拟惯性控制补偿环节的基础上,通过直流侧阻抗的建模和分解,确定了可强化系统阻尼的虚拟电容与电阻分量。然后,考虑接入稳定性、控制器响应速度和高频谐波导致的控制误差,提出了基于附加导纳分频段近似和参数可行域估计的负载VSC虚拟惯性控制参数设计方法。最后,通过双端/三端直流配电系统的仿真分析和RT-Lab硬件在环实验,验证了负载VSC附加虚拟惯性控制的阻尼增强特性及参数设计方法的有效性。In order to illustrate the influence mechanism of additional virtual inertia control on the damping of DC distribution system and realize reasonable configuration,firstly,utilizing the physical concept of analog capacitance,based on the two-port equivalent of DC network,this paper explains the synchronous enhancement effect of load-side parallel capacitors on the system inertia and damping.Besides,the difference between load-side and source-side parallel capacitors is analyzed.Secondly,for the voltage source converter(VSC)with constant power control and constant AC voltage control for the load-oriented power supply,the corresponding compensators to realize the additional virtual inertia is derived,and the virtual capacitance and resistance components that can enhance the system damping are given by modeling and splitting the DC-side impedance.Furthermore,considering the interactive stability,response speed of controller and control error caused by high-frequency harmonics,a virtual inertia control parameter design method based on virtual additional admittance approximation in different frequency bands and parameter feasible region estimation is proposed for load VSC.Finally,it can be verified that the damping enhancement characteristics of the virtual inertial control of the load VSC and the effectiveness of the proposed virtual inertia control parameter design method by the simulation analysis on two-and three-terminal DC distribution systems and the RT-Lab hardware-in-theloop experiment.

关 键 词：直流配电系统 虚拟惯性控制 阻尼 电压源变换器(VSC) 参数设计 

分 类 号：TM721.1[电气工程—电力系统及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]