基于转矩定量分析的VSG低频特性校正方法  

LOW FREQUENCY CHARACTERISTIC CORRECTION METHOD OF VSG BASED ON TORQUE QUANTITATIVE ANALYSIS

作　　者：于鸿儒 陈中 蔡骏[2] 陆寅 史艳琼 Yu Hongru;Chen Zhong;Cai Jun;Lu Yin;Shi Yanqiong(Key Laboratory of Intelligent Manufacturing of Construction Machinery,Anhui Jianzhu University,Hefei 230601,China;School of Automation,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]安徽建筑大学安徽省工程机械智能制造重点实验室,合肥230601 [2]南京信息工程大学自动化学院,南京210044

出　　处：《太阳能学报》2024年第8期135-143,共9页Acta Energiae Solaris Sinica

基　　金：安徽省工程机械智能制造重点实验室开放课题基金资助(IMCM2022KF04)。

摘　　要：首先建立虚拟同步发电机(VSG)的虚拟转矩模型,通过虚拟转矩的定量分析揭示导致VSG低频特性发生变化的主要因素:次同步谐振对VSG的低频特性产生耦合影响和锁相环的负阻尼效应。在论证增加阻尼抑制次同步谐振可行性的基础上,给出稳态阻尼、动态阻尼联合取值方法,而后指出动态阻尼对VSG性能的影响;论证通过相位补偿法抑制低频振荡的可行性,通过对VSG转矩的定量校正,保证VSG的性能指标与设计预期一致。最后通过实验验证理论分析的正确性和设计方法的有效性。Firstly,a virtual torque model of virtual synchronous generator(VSG)is established,and the quantitative analysis of virtual torque reveals the main factors that lead to change of the low-frequency characteristics of VSG.That is the coupling effect of sub synchronous resonance on the low-frequency characteristics of VSG and the negative damping effect of phase-locked loop.On the basis of demonstrating the feasibility of increasing damping to suppress sub synchronous resonance,a joint valuing method for steady-state damping and dynamic damping is proposed,and then the influence of dynamic damping on VSG performance is pointed out.The feasibility of suppressing low-frequency oscillations through phase compensation method is demonstrated,and the consistency of the performance indicators of VSG with design expectations is ensured through quantitative correction of VSG torque.Finally,the correctness of theoretical analysis and the effectiveness of design methods are verified through experiments.

关 键 词：逆变器 虚拟同步发电机 低频振荡 阻尼转矩 相位补偿 转矩校正 

分 类 号：TM464[电气工程—电器]