直流微网母线电压稳定控制策略  

DC Bus Voltage Stability Control Strategy for DC Microgrid

作　　者：张继红[1] 赵锐 高雷 冀伟成 杨培宏[1] 吴振奎[1] ZHANG Jihong;ZHAO Rui;GAO Lei;JI Weicheng;YANG Peihong;WU Zhenkui(Inner Mongolia Key Lab of Solar Thermal and Wind Power(Inner Mongolia University of Science and Technology),Baotou 014010,Inner Mongolia Autonomous Region,China;Equipment Purchasing Office of China National Nuclear Power Zhangzhou Energy Co.,Ltd.,Zhangzhou 363300,Fujian Province,China)

机构地区：[1]内蒙古自治区光热与风能发电重点实验室(内蒙古科技大学),内蒙古自治区包头市014010 [2]中核国电漳州能源有限公司设备采购处,福建省漳州市363300

出　　处：《电网技术》2021年第12期4922-4929,共8页Power System Technology

基　　金：内蒙古自治区关键技术攻关项目(2019GG319)。

摘　　要：直流微网母线电压决定于电源、负荷及相应控制策略,为解决风电、光伏等间歇性电源即插即用、负荷随机投切等复杂情况的微网直流母线电压恒定问题,该文建立了相应数学模型,提出了一种基于混合储能优化控制母线电压波动的多模式电压稳定策略,在考虑储能荷电状态约束的基础上采用电压分段下垂控制方法,实现储能系统对负荷变化的实时跟踪,提高了负荷功率分配精度,保证母线电压基本恒定,采用PSCAD/EMTDC仿真算例和实验测试验证所提方法的可行性和有效性。DC bus voltage depends on the power supply,load and control strategy.In order to solve the problem of the stability of the DC bus voltage in complex situations such as the plug-and-play of intermittent power sources like wind power and photovoltaics,and the random switching of loads,this paper establishes the corresponding mathematical model and proposes a multi-mode voltage stabilization strategy based on hybrid energy storage optimization to suppress the bus voltage fluctuations.Taken the state of charge into consideration,this paper adopts a voltage hierarchical coordinated control strategy,which realizes the real-time tracking of load changes by the energy storage system.Meanwhile,it improves the accuracy of load power distribution and ensures the constancy of the bus voltage basically.Through the PSCAD/EMTDC simulation system and the experimental test,the proposed control strategy is proved reasonable and feasible.

关 键 词：直流微电网 混合储能 多模式协调控制 母线电压分段控制 电压波动抑制 

分 类 号：TM721[电气工程—电力系统及自动化]