基于虚拟直流电机参数优化的混合储能控制策略研究  

RESEARCH ON HYBRID ENERGY STORAGE CONTROL STRATEGY BASED ON VIRTUAL DC MOTOR PARAMETER OPTIMIZATION

作　　者：李嘉辰 田桂珍[1,2] 刘广忱 韩小宇[1] 乔顺庆 Li Jiachen;Tian Guizhen;Liu Guangchen;Han Xiaoyu;Qiao Shunqing(College of Electric Power,Inner Mongolia University of Technology,Hohhot 010080,China;Engineering Research Center of Large Energy Storage Technology,Ministry of Education,Hohhot 010080,China)

机构地区：[1]内蒙古工业大学电力学院,呼和浩特010080 [2]大规模储能技术教育部工程研究中心,呼和浩特010080

出　　处：《太阳能学报》2024年第11期672-682,共11页Acta Energiae Solaris Sinica

基　　金：内蒙古自治区科技重大专项(2020ZD0014);内蒙古自然科学基金(2021MS05003)。

摘　　要：为提高独立运行风光储直流微电网系统惯性与阻尼,针对负载、风/光功率波动引起的母线电压波动问题研究基于虚拟直流电机(VDCM)的改进混合储能控制策略。推导混合储能系统的小信号模型,分析VDCM参数对系统的动态性能影响,并给出VDCM参数的合理取值范围。针对传统VDCM控制下参数选取模糊的问题,设计VDCM参数优化控制,采用带精英策略的快速非支配排序遗传算法(NSGA-Ⅱ)对VDCM参数进行优化,在简化混合储能系统控制的同时解决传统VDCM控制参数选择模糊的问题。研究超级电容端电压自恢复控制策略,使超级电容端电压在系统发生功率波动后能够及时恢复至初始给定值,在保证混合储能合理功率分配的基础上,增强系统惯性,同时防止超级电容的过充和过放。对上述控制策略进行仿真研究,并且搭建基于实时数字仿真系统(RTDS)与快速控制原型(RCP)的硬件在环实验平台进行实验,验证控制策略的正确性与有效性。In order to improve the inertia and damping of the islanded wind-solar-storage DC microgrid system and to address the issue of bus voltage fluctuations caused by load and wind/solar power fluctuations,an improved hybrid energy storage control strategy based on the virtual DC machine(VDCM)is studied.The small-signal modeling of the hybrid energy storage system is deduced,and the influence of VDCM parameters on the dynamic performance of the system is analyzed.The reasonable range of VDCM parameters is also given.Aiming at the problem of vague parameter selection under the traditional VDCM control,the VDCM parameter optimization control is designed,and the parameters of the VDCM are optimized using the non dominated sorting genetic algorithm(NSGA-Ⅱ)offline algorithm.The problem of vague parameter selection in the traditional VDCM control is solved while simplifying the control of the hybrid energy storage system.The self-recovery control strategy of the super capacitor terminal voltage is studied,so that the super capacitor terminal voltage can be restored to the initial set value in time after the power fluctuation of the system occurs.On the basis of ensuring the reasonable power distribution of the hybrid energy storage,the system inertia is enhanced,and the overcharge and over discharge of the super capacitor are prevented.The simulation research on the above control strategies is conducted,and a hardware-inloop experimental platform is built based on real time digital simulation system(RTDS)and rapid control prototyping(RCP)to verify the correctness and effectiveness of the control strategies.

关 键 词：直流微电网 混合储能 虚拟直流电机 超级电容端电压控制 非支配排序遗传算法 

分 类 号：TM721[电气工程—电力系统及自动化]