湖南大学学报（自然科学版）2025，Vol.52Issue(12)：113-124,12.DOI:10.16339/j.cnki.hdxbzkb.2025231
基于滑膜控制的低压微网并联逆变器相环流复合抑制策略
Compound Suppression Strategy of Phase Circulation in Low-voltage Microgrid Parallel Inverters Based on Sliding Mode Control
摘要
Abstract
The phase circulation problem of low-voltage microgrid parallel inverter system seriously affects the power quality and conversion efficiency of the output side of micro-grid.Therefore,sliding mode control(SMC)was introduced to design a compound suppression strategy of phase circulation(CSSPC).Firstly,according to the generation mechanism of phase circulation in parallel system,the inter-phase circulation and intra-phase circulation are modeled,and the inhibition mechanism of different phase circulation is analyzed and given.Then,for the inter-phase circulation of the parallel system,combined with the traditional virtual impedance droop control(VIDC),the robust droop SMC controller was obtained by improving the design:bus voltage response,droop loop output accuracy and virtual induced reactance regulation,in order to improve the power distribution accuracy of the parallel system and restrain the inter-phase circulation;The parametric stability of the robust droop SMC controller is analyzed based on the theory of small signal perturbation.For the intra-phase circulation of parallel system,a zero-sequence voltage SMC suppressor is designed to dynamically adjust the action time of zero vector in space vector pulse width modulation(SVPWM)and to indirectly suppress the intra-phase circulation of parallel system by eliminating zero sequence voltage.Finally,simulations are designed,and the results to show that the CSSPC strategy can control the system inter-phase and intra-phase circulation coefficients within 1.49%and 0.72%respectively,which proves the effectiveness of the proposed strategy.关键词
微网/并联三相逆变器/环流抑制/滑模控制/鲁棒下垂控制/复合策略Key words
microgrid/parallel three-phase inverter/circulation suppression/sliding mode control/robust droop control/compound strategy分类
航空航天引用本文复制引用
张伟琦,王艳敏,宁佳铭,亓彦涛,叶光伟..基于滑膜控制的低压微网并联逆变器相环流复合抑制策略[J].湖南大学学报（自然科学版）,2025,52(12):113-124,12.基金项目
国家自然科学基金资助项目(51307035,62073095),National Natural Science Foundation of China(51307035,62073095) （51307035,62073095）
哈尔滨市科技创新人才项目(RC2024DY395),Harbin Science and Technology Innovation Talent Project(RC2024DY395) （RC2024DY395）
