虚拟直流电机惯性阻尼自适应控制策略  

Adaptive Control Strategy for Inertial and Damping of Virtual DC Motor

作　　者：徐敏[1] 赵巧娥[1] XU Min;ZHAO Qiao-e(College of Electric Power and Architecture,Shanxi University,Taiyuan 030013,China)

机构地区：[1]山西大学电力与建筑学院,太原030013

出　　处：《自动化与仪表》2022年第8期9-12,共4页Automation & Instrumentation

摘　　要：虚拟直流电机控制通过模拟直流电机的机械特性,使DC/DC变换器具备惯性和阻尼支撑。然而,定惯性阻尼系数的虚拟直流电机控制无法同时满足系统对于惯性阻尼支撑以及动态性能的需求,针对这一问题,提出惯性阻尼系数自适应。通过小信号分析惯性系数和阻尼系数对母线电压的影响,根据电压偏差变化趋势,设计自适应函数动态调节惯性系数和阻尼系数,在不影响抗扰性能的前提下,使母线电压更快地恢复至稳态。为了验证该控制策略的有效性,在MATLAB/Simulink中搭建模型进行仿真实验。仿真结果表明,相比于传统控制及其他自适应策略,在负载功率突变时,采用所提控制策略母线电压质量更好。Virtual DC motor control enables the performance of the DC/DC converter with inertia and damping support by simulating the mechanical properties of the DC motor.However,the virtual DC motor control with the constant inertial and damping coefficient can not meet the system requirements for the inertial damping support and the dynamic performance simultaneously,and the inertial and damping coefficient adaptation is proposed.Through small signal analysis,the influence of inertia coefficient and damping coefficient on the bus voltage is obtained.According to the variability trend of the voltage deviation,the adaptive function is designed to dynamically adjust the inertia coefficient and the damping coefficient,so that the bus voltage can recover to the steady state faster without affecting the antidisturbance performance.To verify the effectiveness of this control strategy,the model was built in MATLAB/Simulink and simulated.Simulation results show that bus voltage quality using the proposed control strategy is better when the load power mutation when compared to conventional control and other adaptive strategies.

关 键 词：虚拟直流电机控制 参数自适应 DC/DC变换器 惯性 直流微电网 

分 类 号：TM46[电气工程—电器]