摘要
在直流微电网中,由于受功率波动和负荷突然投切的影响,直流母线电压容易波动。为维持直流母线电压稳定,提出一种双向全桥DC-DC变换器的虚拟惯性控制方法。双向DC-DC变换器在采用扩展移相方法的基础上增加虚拟惯性环节,通过增加一阶滤波器提高系统惯性功率基准,当直流微电网中功率发生波动时,储能单元将提供惯性功率支持。最后,通过Matlab/Simulink搭建仿真模型,仿真结果验证了所提控制策略的有效性与可行性,有效抑制了直流母线电压的波动。
In the DC microgrid,the DC bus voltage is subject to fluctuations due to power fluctuations and sudden switching of the load.In order to maintain the DC bus voltage stability,a virtual inertial control method for bidirectional full-bridge DC-DC converter is proposed.The bidirectional DC-DC converter adds virtual inertia link based on the extended phase shifting method,and increases the inertial power reference of the system by adding a first-order filter.When the power in the DC microgrid fluctuates,the energy storage unit provide inertial power support.Finally,the simulation model is built by Matlab/Simulink.The simulation results verify the effectiveness and feasibility of the proposed control strategy,and effectively suppress the fluctuation of DC bus voltage.
作者
赵龙
赵兴勇
赵钰彬
唐震
ZHAO Long;ZHAO Xing-yong;ZHAO Yu-bin;TANG Zhen(Department of Electrical Engineering,Shanxi University,Taiyuan 030013 China;State Grid Shanxi Electric Power Research Institute,Taiyuan 030013 China)
出处
《自动化技术与应用》
2020年第7期1-4,共4页
Techniques of Automation and Applications
