摘要
随着电力电子技术的发展,具有虚拟同步发电机(VSG)功能的微网型储能逆变器也得到了广泛应用。在虚拟同步发电机技术中由于惯性调频环及调压环的存在,逆变器在并网时可自主实现电网调频调压功能,离网时也可实现无通信并机。但是在微网系统中由于负载和变压器的接入,逆变器离网时并机黑启动技术是亟待解决的问题之一。通过理论仿真分析,提出了一种工频同步的软启动方法,可实现平滑的母线电压建立。在软启动过程中两台VSG并机功率均衡,实现了整个系统黑启动的完成。最后通过实验分析,验证了VSG并机黑启动控制策略的有效性。
With the development of power electronics technology,microgrid type energy storage inverters with virtual synchronous generator(VSG)function have also been widely used.In VSG technology,due to the presence of inertial frequency regulation loop and voltage regulation loop,the inverter can realize the grid frequency regulation and voltage regulation function independently when it is connected to the grid,and it can realize the parallel power without communication when it is off-grid.However,in the microgrid system,due to the access of load and transformer,the parallel black start technology is one of the urgent problems to be solved when the inverter is off-grid.Through theoretical simulation analysis,an industrial frequency synchronous soft start method was proposed,which can realize smooth bus voltage establishment.The parallel power equalization of two VSGs during the soft start process achieved the completion of the black start of the whole system.Finally,the effectiveness of the parallel VSG black start control strategy was verified through experimental analysis.
作者
杨帆
王换民
YANG Fan;WANG Huanmin(Shanghai Hongzheng New Energy Technology Corporation,Shanghai 201400,China;School of Electronic Information and Electrical Engineering,Shangluo University,Shangluo 726000,Shaanxi,China)
出处
《电气传动》
2024年第2期49-54,共6页
Electric Drive
基金
陕西省教育厅一般专项科研计划项目(22JK0366)。
关键词
工频同步
黑启动
虚拟同步发电机
frequency synchronization
black start
virtual synchronous generator(VSG)
