光伏直流微电网的并离网无缝切换控制策略研究

doi:10.3969/j.issn.1008-0198.2024.02.016

湖南电力 ›› 2024, Vol. 44 ›› Issue (2): 122-128.doi: 10.3969/j.issn.1008-0198.2024.02.016

光伏直流微电网的并离网无缝切换控制策略研究

唐立行, 罗朝旭, 文永兴, 张博

湖南工业大学电气与信息工程学院,湖南株洲 412007

收稿日期:2023-12-05 修回日期:2023-12-28 出版日期:2024-04-25 发布日期:2024-05-14
通信作者: 罗朝旭(1987),男,博士,讲师,主要研究方向为电力电子变换器建模与控制。
作者简介:唐立行(1998),男,硕士研究生在读,主要研究方向为直流微电网控制与优化技术。
基金资助:
国家自然科学基金项目(52207205);湖南省教育厅优秀青年项目(22B0563)

Research on Seamless Switching Control Strategy of Grid Connected and Off for Photovoltaic DC Microgrids

TANG Lixing, LUO Zhaoxu, WENG Yongxing, ZHANG Bo

School of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China

Received:2023-12-05 Revised:2023-12-28 Online:2024-04-25 Published:2024-05-14

摘要/Abstract

摘要： 当光伏直流微电网从并网模式切换为孤岛模式时,传统控制策略下工作模式的突然切换容易导致直流母线电压波动过大,危害微电网稳定运行。针对此问题,提出一种光伏直流微电网的并离网无缝切换控制策略,使各光伏分布式电源在并网运行时能够跟踪最大功率点输出,在孤岛运行时能支撑调节母线电压,同时实现各光伏电源功率均分。该控制策略的优点是并离网控制策略统一,无需模式切换且为分散控制,各光伏电源之间无需通信,可靠性高。最后基于MATLAB/Simulink平台搭建仿真模型,仿真结果验证了所提控制策略的正确性和有效性。

关键词: 光伏直流微电网, 母线电压, 最大功率点跟踪, 无缝切换

Abstract: When the photovoltaic DC microgrid switches from grid connected mode to island mode,the sudden switching of working mode in traditional control strategies often leads to excessive or even unstable voltage fluctuations in the DC bus,endangering the stable operation of the microgrid.To address this issue,a seamless switching control strategy of grid connected and off for photovoltaic DC microgrids is proposed,which enables each photovoltaic distributed power source to track the maximum power point output during grid connection operation,support the regulation of bus voltage during island operation,and achieve power sharing of each photovoltaic power source output.The prominent advantage of this control strategy is that the control strategy of grid connected and off is unified without the need for mode switching,and it is decentralized control without the need for communication between various photovoltaic power sources with high reliability.Finally,a simulation model is built based on the MATLAB/Simulink platform,and the simulation results verify the correctness and effectiveness of the proposed control strategy.

Key words: photovoltaic DC microgrid, bus voltage, maximum power point tracking, seamless switching

中图分类号:

TM712.13

唐立行, 罗朝旭, 文永兴, 张博. 光伏直流微电网的并离网无缝切换控制策略研究[J]. 湖南电力, 2024, 44(2): 122-128.

TANG Lixing, LUO Zhaoxu, WENG Yongxing, ZHANG Bo. Research on Seamless Switching Control Strategy of Grid Connected and Off for Photovoltaic DC Microgrids[J]. Hunan Electric Power, 2024, 44(2): 122-128.

参考文献

[1] 刘志成,彭道刚,赵慧荣,等.双碳目标下储能参与电力系统辅助服务发展前景[J].储能科学与技术,2022,11(2):704-716.
[2] 李宏仲,汪瑶,胡哲晟,等.双碳背景下配电网对多元接入体的承载能力评估[J].电网技术,2022,46(9):3595-3604.
[3] 丁雨昊,吕干云,刘永卫,等.考虑碳排放目标约束和需求侧响应的综合能源系统日前优化调度[J].南方电网技术,2022,16(8):1-11.
[4] 张俊涛,程春田,申建建,等.考虑风光不确定性的高比例可再生能源电网短期联合优化调度方法[J].中国电机工程学报,2020,40(18):5921-5932.
[5] 张金平,汪宁渤,黄蓉,等.高渗透率光伏参与电力系统调频研究综述[J].电力系统保护与控制,2019,47(15):179-186.
[6] 陈晓龙,杨志颖,李永丽,等.基于MPPT梯形电压扰动的直流微电网新型孤岛检测方法[J].电网技术,2020,44(12):4799-4808.
[7] 田艳军,高皓楠,王毅,等.光照不均时独立输入串联输出型光伏直流汇集系统分层优化MPPT控制策略[J].高电压技术,2020,46(10):3552-3562.
[8] 罗茜,陈卓,郝正航,等.基于新型趋近律的光伏MPPT控制策略[J].电力系统保护与控制,2023,51(5):139-153.
[9] 王永光,戈庆长.分布式光伏发电系统多峰值MPPT优化研究[J].电力科学与技术学报,2020,35(2):3-11.
[10] LIU H P,LOH P C,WANG X F,et al. Droop control with improved disturbance adaption for a PV system with two power conversion stages[J]. IEEE Transactions on Industrial Electronics,2016,63(10):6073-6085.
[11] 朱珊珊,汪飞,郭慧,王奇丰,等.直流微电网下垂控制技术研究综述[J].中国电机工程学报,2018,38(01):72-84,344.
[12] 郭慧,汪飞,顾永文,等.基于电压分层控制的直流微电网及其储能扩容单元功率协调控制策略[J].电工技术学报,2022,37(12):3117-3131.
[13] CAI H D,XIANG J,WEI W,et al.V-dp/dv droop control for PV sources in DC microgrids[J]. IEEE Transactions on Power Electronics,2018,33(9):7708-7720.
[14] 田艳军,陈映妃,王慧,等.光伏级联DC/DC变换器模式切换稳定性分析及降压运行策略[J].电力建设,2020,41(1):97-105.
[15] 潘鹏鹏,陈武,侯凯,等.中低压直流配电系统的分散式统一控制策略[J].电力系统自动化,2019,43(23):72-80.
[16] 蔡宏达. 高密度分布式光伏电源接入的交直流混合微电网协调控制研究[D].杭州:浙江大学, 2019.
[17] MAHMOOD H, MICHAELSON D, JIANG J. Decentralized power management of a PV/battery hybrid unit in a droop-controlled islanded microgrid[J]. IEEE Transactions on Power Electronics,2015,30(12):7215-7229.
[18] 郭洪智,张勤进,刘彦呈,等.基于滑模的直流微电网光伏系统无缝切换策略[J].电力系统及其自动化学报,2019,31(8):13-20.
[19] ZENG H M, ZHAO H L, YANG Q. Coordinated energy management in autonomous hybrid AC/DC microgrids[C]//2014 International Conference on Power System Technology,Chengdu,China. IEEE, 2014:3186-3193.
[20] PIEES V F, CORDEIRO A, FOITO D, et al. Control transition mode from voltage control to MPPT for PV generators in isolated DC microgrids[J]. International Journal of Electrical Power & Energy Systems, 2022, 137:107876.1-107876.15.

光伏直流微电网的并离网无缝切换控制策略研究

Research on Seamless Switching Control Strategy of Grid Connected and Off for Photovoltaic DC Microgrids

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

编辑推荐

Metrics

本文评价