光伏交直流混合微电网功率分配研究&#x02014;&#x02014;基于改进下垂控制策略

蔡浩; 唐静; 施凯; 冯霏; 司强

doi:10.19912/j.0254-0096.tynxb.2024-0549

PDF(1456 KB)

太阳能学报 ›› 2025, Vol. 46 ›› Issue (5) : 227-234. DOI: 10.19912/j.0254-0096.tynxb.2024-0549

光伏交直流混合微电网功率分配研究——基于改进下垂控制策略

蔡浩^1,2, 唐静¹, 施凯³, 冯霏¹, 司强¹

作者信息 +

RESEARCH ON POWER DISTRIBUTION OF PHOTOVOLTAIC AC/DC HYBRID MICROGRID—Based On Improved Droop Control Strategy

Cai Hao^1,2, Tang Jing¹, Shi Kai³, Feng Fei¹, Si Qiang¹

Author information +

文章历史 +

摘要

在传统U-I下垂控制策略基础上,提出一种基于改进下垂控制的光伏交直流混合微电网功率分配方案。首先,引入虚拟负阻抗,消除线路阻抗引发的母线电压波动,有效改善光伏发电功率分配效果。随后,增加基于虚拟阻抗进行电压补偿环节,避免电压降落引发的系统紊乱问题,并探究改进下垂控制策略中虚拟负阻抗值、下垂系数参数变化对光伏交直流混合微电网系统稳定性的影响。最后,通过RT-LAB实验平台进行实验分析,验证所提策略具备有效性,能够有效提高系统运行稳定性。

Abstract

Based on the traditional U-I droop control strategy, this article proposes a power allocation scheme for photovoltaic AC/DC hybrid microgrids based on improved droop control. Firstly, introducing virtual negative impedance to eliminate bus voltage fluctuations caused by line impedance and effectively improve the power distribution effect of photovoltaic power generation. Subsequently, voltage compensation based on virtual impedance was added to avoid system disturbances caused by voltage drop the impact of virtual negative impedance values and droop coefficient parameter changes on the stability of photovoltaic AC/DC hybrid microgrid systems in improved droop control strategies was explored. Finally, simulation experiments were conducted using the RT-LAB experimental platform, proving that the proposed strategy is effective and can improve the stability of the system.

导出引用

蔡浩, 唐静, 施凯, 冯霏, 司强. 光伏交直流混合微电网功率分配研究——基于改进下垂控制策略[J]. 太阳能学报. 2025, 46(5): 227-234 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0549

Cai Hao, Tang Jing, Shi Kai, Feng Fei, Si Qiang. RESEARCH ON POWER DISTRIBUTION OF PHOTOVOLTAIC AC/DC HYBRID MICROGRID—Based On Improved Droop Control Strategy[J]. Acta Energiae Solaris Sinica. 2025, 46(5): 227-234 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0549

中图分类号： TM615

参考文献

[1] 殷辉, 陆信辉, 周开乐. 分布式与集中式储能并存的微电网负荷优化调度[J]. 中国管理科学, 2023, 31(2): 118-128.
YIN H, LU X H, ZHOU K L.Optimal load dispatch for microgrid with distributed and centralized energy storage systems[J]. Chinese journal of management science, 2023, 31(2): 118-128.
[2] 唐圣学, 王彦丰, 乔乃珍. 光伏发电系统直流串联故障电弧检测方法研究[J]. 太阳能学报, 2023, 44(11): 31-39.
TANG S X, WANG Y F, QIAO N Z.Study on detection method of DC fault arc based on photovoltaic power generation system[J]. Acta energiae solaris sinica, 2023, 44(11): 31-39.
[3] 肖伸平, 廖世英, 张晓虎, 等. 含时滞的不确定性交直流微电网直流母线电压H_∞控制[J]. 电力自动化设备, 2024, 44(4): 184-189, 217.
XIAO S P, LIAO S Y, ZHANG X H, et al.H_∞ control of DC bus voltage in uncertain AC/CD microgrid with time delays[J]. Electric power automation equipment, 2024, 44(4): 184-189, 217.
[4] 张富建. 光伏发电系统远程监测平台设计及其稳定性应用的实践探索: 以“源网荷” 一体智能光伏实验室电网项目为例[J]. 科技管理研究, 2023, 43(18): 162-168.
ZHANG F J.Design of remote monitoring platform for photovoltaic power generation system and practical exploration of its stability application[J]. Science and technology management research, 2023, 43(18): 162-168.
[5] 汪亮, 吴韬, 彭勇刚, 等. 光伏主导的交直流混合微电网实验平台[J]. 实验室研究与探索, 2020, 39(9): 74-78, 113.
WANG L, WU T, PENG Y G, et al.Experimental platform for hybrid AC/DC microgrid dominated by PV[J]. Research and exploration in laboratory, 2020, 39(9): 74-78, 113.
[6] 谭虎, 王小亮, 徐亭亭, 等. 风光沼储交直流混合农村微电网经济技术优化[J]. 中国电力, 2024, 57(3): 27-33.
TAN H, WANG X L, XU T T, et al.Economic and technological optimization of hybrid rural microgrid with wind, PV, biogas, storage, AC, and DC[J]. Electric power, 2024, 57(3): 27-33.
[7] 赖钧杰, 文小玲, 张淇, 等. 基于改进麻雀搜索算法的直流微电网容量优化配置[J]. 太阳能学报, 2023, 44(8): 157-163.
LAI J J, WEN X L, ZHANG Q, et al.Capacity optimization configuration of DC microgrid based on improved sparrow search algorithm[J]. Acta energiae solaris sinica, 2023, 44(8): 157-163.
[8] 颜丽, 米阳, 孙威, 等. 基于改进下垂控制的孤岛交流微电网无功分配研究[J]. 太阳能学报, 2021, 42(8): 7-15.
YAN L, MI Y, SUN W, et al.Reactive power distribution control strategy in islanded AC microgrid based on improved droop control[J]. Acta energiae solaris sinica, 2021, 42(8): 7-15.
[9] GASQUE M, GONZÁLEZ-ALTOZANO P, GUTIÉRREZ-COLOMER R P, et al. Optimisation of the distribution of power from a photovoltaic generator between two pumps working in parallel[J]. Solar energy, 2020, 198: 324-334.
[10] 杨荣, 邹晓松, 袁旭峰, 等. 计及混合储能荷电状态的光伏直流微网功率分配策略[J]. 电网与清洁能源, 2021, 37(9): 118-126.
YANG R, ZOU X S, YUAN X F, et al.The power distribution strategy of the photovoltaic DC microgrid considering the state of charge of hybrid energy storage[J]. Power system and clean energy, 2021, 37(9): 118-126.
[11] 张勤进, 胡王宝, 刘彦呈, 等. 一种直流微电网多光伏变换器新型功率分配策略[J]. 电力系统保护与控制, 2022, 50(9): 101-112.
ZHANG Q J, HU W B, LIU Y C, et al.A novel power sharing strategy for multi photovoltaic converters in a DC microgrid[J]. Power system protection and control, 2022, 50(9): 101-112.
[12] 李怡, 李永丽, 李松, 等. 基于VSG的光伏及混合储能系统功率分配与虚拟惯性控制[J]. 电力自动化设备, 2023, 43(7): 27-34.
LI Y, LI Y L, LI S, et al.Power distribution and virtual inertia control of photovoltaic and hybrid energy storage system based on VSG[J]. Electric power automation equipment, 2023, 43(7): 27-34.
[13] EAJAL A A, YAZDAVAR A H, EL-SAADANY E F, et al. Optimizing the droop characteristics of AC/DC hybrid microgrids for precise power sharing[J]. IEEE systems journal, 2021, 15(1): 560-569.
[14] 薛阳, 黄薪操, 席东翔, 等. 基于叠加频率的直流微电网改进下垂控制策略研究[J]. 太阳能学报, 2022, 43(9): 461-467.
XUE Y, HUANG X C, XI D X, et al.Researchon improved droop control strategyof DC microgrid based on superimposed frequency[J]. Acta energiae solaris sinica, 2022, 43(9): 461-467.
[15] 张玉, 罗浩文, 王瑜琳. 基于模糊-下垂控制的光伏直流微电网混合储能功率分配及母线稳压研究[J]. 电测与仪表, 2023, 60(5): 51-58.
ZHANG Y, LUO H W, WANG Y L.Research on hybrid energy storage power distribution and bus voltage stabilization of photovoltaic DC micro-grid based on fuzzy-droop control[J]. Electrical measurement & instrumentation, 2023, 60(5): 51-58.
[16] 曾岭瑞, 刘毅力, 崔关奇. 基于虚拟电抗的微电网改进下垂控制策略[J]. 国外电子测量技术, 2023, 42(10): 69-76.
ZENG L R, LIU Y L, CUI G Q.Improved droop control strategy for microgrid based on virtual reactance[J]. Foreign electronic measurement technology, 2023, 42(10): 69-76.
[17] 户艳琴, 周仁友, 黄天翔, 等. 基于改进下垂控制的并网级联型储能系统SOC均衡策略[J]. 电力系统保护与控制, 2021, 49(22): 120-129.
HU Y Q, ZHOU R Y, HUANG T X, et al.SOC balancing strategy of a grid-connected cascaded-type energy storage system based on advanced droop control[J]. Power system protection and control, 2021, 49(22): 120-129.
[18] 吴青峰, 褚晓林, 于少娟, 等. 基于改进型P-E下垂控制的低压交流微电网不同容量储能单元SOC均衡策略[J]. 太阳能学报, 2023, 44(4): 266-275.
WU Q F, CHU X L, YU S J, et al.SOC balancing strategy of low voltage AC microgrids with different capacities base on improved P-E droop control[J]. Acta energiae solaris sinica, 2023, 44(4): 266-275.
[19] 曹娜, 王孟, 于群. 基于储能单元SOC的改进下垂控制策略[J]. 安徽大学学报(自然科学版), 2022, 46(1): 54-60.
CAO N, WANG M, YU Q.Improved droop control strategy based on SOC of energy storage unit[J]. Journal of Anhui University (natural science edition), 2022, 46(1): 54-60.
[20] 杨天国, 何鹏, 张浩, 等. 多变流器互联交直流微网集群一致性功率协同控制[J]. 电力系统及其自动化学报, 2024, 36(4): 120-132.
YANG T G, HE P, ZHANG H, et al.Consensus-based power coordinated control of AC/DC microgrid cluster with multiple interconnected converters[J]. Proceedings of the CSU-EPSA, 2024, 36(4): 120-132.