基于线性化模型的虚拟同步发电机惯性和阻尼辨识

发布时间：2018-06-22 04:40

  本文选题：虚拟同步发电机 + 惯性和阻尼　； 参考：《电力系统自动化》2017年10期

【摘要】：针对并网逆变器的虚拟同步发电机(VSG)控制,提出了一种VSG实际输出惯性和阻尼的辨识方法,以定量量化VSG参与电网调节能力的强弱。基于VSG的二阶非线性模型,及其在工作点附近的小信号摄动处理,建立了VSG的线性化传递函数模型,给出了其离散化模型及其与VSG惯性和阻尼参数之间的关系,分析了线性化模型的误差大小和适用范围。利用VSG的输出功率阶跃扰动,激励出VSG的功率振荡模态信息,并利用最小二乘估计的方法,辨识出VSG实际输出的惯性和阻尼参数。最后,针对并网逆变器的常规控制方法和VSG控制方法,利用仿真分析和实验结果,验证了所提模型和方法的可行性和有效性。
[Abstract]:Aiming at the virtual synchronous generator (VSG) control of grid-connected inverter, a method of identifying the actual output inertia and damping of VSG is proposed to quantify quantitatively the ability of VSG to participate in power grid regulation. Based on the second order nonlinear model of VSG and its small signal perturbation processing near the working point, the linearized transfer function model of VSG is established, and its discretization model and its relationship with the inertia and damping parameters of VSG are given. The error and application range of the linearization model are analyzed. The output power step disturbance of VSG is used to excite the mode information of VSG power oscillation, and the inertia and damping parameters of VSG output are identified by using the least square estimation method. Finally, the feasibility and effectiveness of the proposed model and method are verified by simulation analysis and experimental results for the conventional control method and VSG control method of grid-connected inverter.
【作者单位】： 输配电装备及系统安全与新技术国家重点实验室(重庆大学);
【基金】：重庆市基础科学与前沿技术研究专项资助项目(cstc2016jcyjA0108) 中央高校基本科研业务费专项资金资助项目(106112015CDJXY150005) 国家电网公司科技项目(SGHADK00PJJS1500060)~~
【分类号】：TM31
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本文编号：2051632