摘要
电池储能系统的核心装置之一是双向DC/DC变换器,双向LLC谐振变换器以其高效高功率密度的优势在电池储能系统中得到广泛应用。此处对双向DC/DC变换器功率双向切换问题展开研究,通过采用直流母线电压下垂技术,确定了电池储能系统中双向DC/DC变换器功率传输和双向切换的逻辑;针对双向切换时采样信号的干扰问题,提出一种二阶巴特沃斯滤波器和限幅滤波器的结合策略,增强了系统的可靠性,加快了功率双向切换速度;最后,通过搭建PLECS仿真平台和2.5 kW实验平台,验证了基于直流母线电压下垂控制的功率双向切换策略的有效性和优越性。
Bidirectional DC/DC converter is one of the core devices of battery energy storage system.Bidirectional LLC resonant converter is widely used in battery energy storage system because of its advantages of high efficiency and high power density.Research on the problem of power bidirectional switching of bidirectional DC/DC converter is conducted.By using DC bus voltage drooping technology,the logic of the power transmission and bidirectional switching of the bidirectional DC/DC converter in the battery energy storage system is determined.Aiming at the interference problem of sampling signal during bidirectional switching,a combination strategy of second-order Butterworth filter and limiting filter is proposed,which enhances the reliability of the system and speeds up the power bidirectional switching speed.Finally,by setting up the PLECS simulation platform and the 2.5 kW experimental platform to verify the effectiveness and superiority of the power bidirectional switching strategy based on DC bus voltage droop control.
作者
沙梦琪
王勇
SHA Meng-qi;WANG Yong(Shanghai Electric Power University,Shanghai 200090,China)
出处
《电力电子技术》
北大核心
2023年第2期56-59,共4页
Power Electronics
关键词
变换器
功率双向切换
下垂控制
converter
power bidirectional switching
droop control
