摘要
由于线路阻抗的存在,传统的阻性下垂控制策略并不能很好地协调各母线电压的稳定和功率精分的要求。为解决该问题,提出了一种考虑通信延迟的适用于多母线结构直流微电网的分组一致性自适应下垂控制策略。以双母线结构直流微电网为例,将原本独立的高、低母线上的功率单元分组互联,并通过推导得出系统能够收敛的最大通信延时,同时加入抗干扰状态观测器,减小电压和电流观测器受到扰动带来的影响,提高一致性算法的收敛精度,实现功率精分和母线电压稳定。最后,通过MATLAB/Simulink仿真验证所提出的适用于多母线结构的直流微电网的分组一致性控制策略的有效性和优越性。
Due to the existence of line impedance,the conventional resistive droop control strategy can not well coordinate the bus voltage and power distribution of each micro-source.To solve this problem,this paper proposes an adaptive droop control strategy of multi-bus DC microgrids based on group consensus algorithm considering communication delay.Taking the dual-bus DC microgrid as an example,the power units on the high and the low buses are grouped and interconnected,and the maximum communication delay under which the system can converge is derived.At the same time,the anti-interference state observer is added to reduce the disturbance caused by voltage and current observers,improving the convergence accuracy of the consensus algorithm and achieving the balance between power distribution and bus voltage.Finally,MATLAB/Simulink simulation verifies the effectiveness and superiority of the proposed control strategy for multi-bus DC microgrids.
作者
梁海峰
丁锦睿
边吉
LIANG Haifeng;DING Jinrui;BIAN Ji(Key Laboratory of Distributed Energy Storage and Microgrid of Hebei Province,North China Electric Power University,Baoding 071003,China)
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2021年第2期20-29,39,共11页
Journal of North China Electric Power University：Natural Science Edition
关键词
直流微电网
多母线结构
功率精分
分组一致性
通信延时
DC microgrid
multi-bus
accurate power sharing
group consensus algorithm
communication delay
