摘要
基于光伏、储能技术混合供电的直流微电网系统被广泛应用于新能源游船。针对其日用负荷供电变流器接入不平衡负荷或者单相负荷时出现的供电电压不平衡问题,文章提出一种基于输出电压正负序分离的无差拍预测电压控制策略,在正负序坐标系下分别实现供电变流器电压正负序分量控制,保证供电变流器输出三相电压平衡,增强系统对不平衡负荷的抗干扰能力,避免增加额外的电能质量治理装置。仿真结果表明,采用所提无差拍预测电压控制策略后,直流微电网的日用负荷供电变流器电压不平衡度从28%降低到0.5%以下,验证了所提控制算法的有效性。
DC microgrid systems based on hybrid photovoltaic-electrical energy storage systems for power generation are widely used in new energy cruise ships.For the problem of power supply voltage unbalance arising when a daily load power supply converter is connected to an unbalanced load or single-phase load,this paper proposes a dead-beat predictive voltage control strategy based on positive and negative sequence separation of output voltage.This strategy can realize control of positive and negative sequence components of the power supply converter voltage under the positive and negative sequence coordinate systems respectively,to ensure the three-phase voltage balance of the power supply converter,enhance the anti-interference ability of the system against unbalanced load and avoid additional power quality control devices.The simulation results show that,after the proposed control strategy is adopted,the voltage unbalance of the daily load power supply converter is reduced from 28%to less than 0.5%,which verifies the effectiveness of the proposed control algorithm.
作者
梁锡凡
王跃
付建国
周振邦
童子威
LIANG Xifan;WANG Yue;FU Jianguo;ZHOU Zhenbang;TONG Ziwei(CRRC Zhuzhou Institute Co.,Ltd.,Zhuzhou,Hunan 412001,China)
出处
《控制与信息技术》
2024年第2期89-93,共5页
CONTROL AND INFORMATION TECHNOLOGY
基金
湖南省重点研发计划项目(2022GK2062)
中国国家铁路集团有限公司计划项目(K2021J011)。
