IPOS型光伏直流升压外送系统控制策略研究  

RESEARCH ON CONTROL STRATEGY OF IPOS TYPE PHOTOVOLTAIC DC BOOST DELIVERY SYSTEM

作　　者：李广林 樊艳芳[1] 王一波[2] 高文森 常喜强[4] Li Guanglin;Fan Yanfang;Wang Yibo;Gao Wensen;Chang Xiqiang(Engineering Research Center for Renewable Energy Generation&Grid Control,Xinjiang University,Urumqi 830047,China;Institute of Electronic Engineering,Chinese Academy of Sciences,Beijing 100190,China;State Grid Urumqi Power Supply Company,Urumqi 830011,China;State Grid Xinjiang Communication Center for Power Dispatching,Urumqi 830002,China)

机构地区：[1]新疆大学教育部可再生能源发电与并网控制工程技术研究中心,乌鲁木齐830047 [2]中国科学院电工研究所,北京100190 [3]国网乌鲁木齐供电公司,乌鲁木齐830011 [4]新疆电力公司电力调度控制中心,乌鲁木齐830002

出　　处：《太阳能学报》2021年第8期166-176,共11页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51767023);国家重点研发计划(2016YFB0900200)。

摘　　要：当光伏直流升压外送系统启动时升压侧和逆变侧均存在过电流问题,同时有源钳位Boost全桥升压变换器(BFBIC)模块开关频率高,使系统损耗严重及工作可靠性降低。针对上述问题,该文提出一种输入并联输出串联(IPOS)型光伏直流升压外送系统,通过分析系统启动过电流原理,提出该系统的软启动控制策略。同时对有源钳位BFBIC开关管提出一种零电压开关(ZVS)型软开关控制策略,并对其约束条件进行理论推导。通过2种控制策略的协调配合,实现了系统的软启动和有源钳位BFBIC的软开关,确保了系统安全稳定运行。最后在Matlab/Simulink中搭建一个1 MW/±30 kV的IPOS型光伏直流升压外送系统模型,仿真验证了所提控制策略的有效性。When the photovoltaic DC boosting delivery system starts,there is an overcurrent problem on both the boost side and the inverter side, and the active clamp BFBIC module has a high switching frequency, which causes serious system loss and reduces operational reliability. Aiming at the above problems, this paper proposed a DC boost external delivery system for IPOS type photovoltaic power station. By analyzing the principle of system startup overcurrent, the soft start control strategy of the system was proposed. At the same time,a ZVS soft-switching control strategy was proposed for the active clamp BFBIC switch, and the constraint conditions were theoretically derived. Through the coordination of the two control strategies,the soft start of the system and the soft switching of the active clamp BFBIC are realized,ensuring the safe and stable operation of the system. Finally,a 1 MW/±30 kV IPOS photovoltaic DC boost delivery system model was built in Matlab/Simulink. The simulation results verify the effectiveness of the new control strategy.

关 键 词：光伏电站 启动过电流 零电压开关 输入并联输出串联直流升压 有源钳位Boost全桥升压变换器 软启动 

分 类 号：TM722[电气工程—电力系统及自动化]