电力系统自动化2024，Vol.48Issue(2)：95-104,10.DOI:10.7500/AEPS20230328002
虚拟同步直驱风机低频振荡机理分析及阻尼补偿控制
Low-frequency Oscillation Mechanism Analysis and Damping Compensation Control of Virtual Synchronous Direct-driven Wind Turbine Generators
摘要
Abstract
Virtual synchronous generator(VSG)technology can effectively improve the voltage support ability of the power grid.However,it also introduces complex low-frequency oscillation(LFO)problems.At present,most of the LFO studies on traditional VSG ignore the DC-side and generator-side dynamics,which makes it difficult to accurately characterize the LFO characteristics of virtual synchronous direct-driven wind turbine generators.To deal with the above problems,a unified damping torque model considering both the generator-side dynamics and the DC voltage dynamics is established.By using the damping torque method,it is revealed that the negative damping torque produced by the rotor dynamics on the generator side is the main reason of the LFO for wind turbines.Then,the influence law of each link on the LFO characteristics of the wind turbine is analyzed.Furthermore,a damping compensation control is proposed to reduce the negative damping effect of the machine-side dynamics and effectively improve the stability of wind turbine generator grid-connected system under machine-side coupling.Finally,the applicability of the proposed control in multi-computer systems is briefly analyzed,and the cases studies based on the MATLAB/Simulink simulation are conducted to verify the accuracy of the theoretical analysis and the effectiveness of the proposed control.关键词
低频振荡/虚拟同步机/直驱风机/阻尼转矩法/稳定性Key words
low-frequency oscillation/virtual synchronous generator/direct-driven wind turbine generator/damping torque method/stability引用本文复制引用
王子骏,庄可好,辛焕海,李少林,齐琛,程雪坤..虚拟同步直驱风机低频振荡机理分析及阻尼补偿控制[J].电力系统自动化,2024,48(2):95-104,10.基金项目
国家电网有限公司总部科技项目(电压源型风电机组关键技术及示范,4000-202114068A-0-0-00). This work is supported by State Grid Corporation of China(No.4000-202114068A-0-0-00). （电压源型风电机组关键技术及示范,4000-202114068A-0-0-00）
