电力系统自动化2017，Vol.41Issue(10)：37-43,81,8.DOI:10.7500/AEPS20160729002
基于线性化模型的虚拟同步发电机惯性和阻尼辨识
Estimation of Inertia and Damping for Virtual Synchronous Generator Based on Linearized Model
摘要
Abstract
For the control of virtual synchronous generator (VSG) of grid-connected inverter, an approach is proposed to estimate the produced inertia and damping of VSG.Thus, the capability of VSG to participate in power grid adjustment can be quantified.Based on the second-order nonlinear model of VSG and its small signal perturbation processing ability near the working point, a linearized model for VSG is proposed.The discrete model of the linearized model is derived and its relation with inertia and damping parameters of VSG is given.The error magnitude and effective range of the linearized model are proposed.Using the output power step disturbance of VSG, the modal information on power oscillation of VSG is energized.Then, the least-square method is utilized to estimate actual inertia and damping parameters of VSG.Finally, by taking the normal control and VSG control into account, simulated results and experimental measurements have confirmed the possibility and effectiveness of the proposed model and approach.关键词
虚拟同步发电机/惯性和阻尼/参数辨识/最小二乘法Key words
virtual synchronous generator/inertia and damping/parameter estimation/least-square method引用本文复制引用
曾正,邵伟华..基于线性化模型的虚拟同步发电机惯性和阻尼辨识[J].电力系统自动化,2017,41(10):37-43,81,8.基金项目
重庆市基础科学与前沿技术研究专项资助项目(cstc2016jcyjA0108) （cstc2016jcyjA0108）
中央高校基本科研业务费专项资金资助项目(106112015CDJXY150005) （106112015CDJXY150005）
国家电网公司科技项目(SGHADK00PJJS1500060).This work is supported by Chongqing Research Program of Basic Research and Frontier Technology (No.cstc2016jcyjA0108), Fundamental Research Funds for the Central Universities (No.106112015CDJXY150005) and State Grid Corporation of China (No.SGHADK00PJJS1500060). （SGHADK00PJJS1500060）
