摘要
针对风光储互补的双层母线直流微电网系统,提出一种基于多端口变换器直流微电网分布式模型预测控制策略。首先,建立各个子微网系统中风电系统、光伏系统和储能系统的数学模型,其次,依据风电系统、光伏系统工作在经济最优,发电功率最大,储能系统作为补充的原则,采用分布式模型预测控制算法优化风电系统、光伏系统输出功率,保证高低压侧母线负荷跟踪性能和经济性能。最后,通过微网间DC/DC变换器进行PI控制,实现高低压母线间能量平衡,维持母线电压稳定。通过仿真、实验验证,所提控制策略能够实现各个微电网发电单元经济最优的同时,维持高低压侧母线的功率平衡和母线电压稳定,提高了系统的运行可靠性。
A distributed model predictive control strategy based on multi-port converter DC microgrid is proposed for the two-layer bus DC microgrid system with complementary wind and light storage.Firstly,the mathematical model of the wind power system,the photovoltaic system and the energy storage system in each sub-microgrid system is established.Secondly,according to the principle that the wind power system and the photovoltaic system work in the economic optimum,the power generation is the largest,and the energy storage system is supplemented,the distribution is adopted.The model predictive control algorithm optimizes the output power of the wind power system and the photovoltaic system to ensure the high-low voltage side bus load tracking performance and economic performance.Finally , the PI control is performed,by the DC/DC converter between the microgrids to achieve energy balance between the high and low voltage buses and to maintain the bus voltage stability.Through simulation and experimental verification , the proposed control strategy can realize the economical optimization of each microgrid power generation unit while maintaining the power balance of the high and low voltage side busbars and the stability of the bus voltage,and improving the operational reliability of the system.
作者
张瑞成
翟电杰
张怡
ZHANG Rui-cheng;ZHAI Dian-jie;ZHANG Yi(College of Electrical Engineering,North China University of Science and Technology,Hebei Tangshan 063210,China)
出处
《机械设计与制造》
北大核心
2022年第3期242-246,250,共6页
Machinery Design & Manufacture
基金
国家自然科学基金资助项目(61803154)
河北省自然科学基金资助项目(F2018209201)
华北理工大学2019年研究生创新项目(2019S19)。
