|
|
|
| Research on the Improved Droop Control Strategy for Improving the Dynamic Characteristics of DC Microgrid |
| Zhi Na1, Zhang Hui1 ,Xiao Xi2 |
1.Faculty of Automation and Information Engineering Xi’an University of Technology Xi’an 710048 China
2.State Key Lab of Power Systems Tsinghua University Beijing 100084 China |
|
|
|
|
Abstract In this paper,the influence of the power turbulence on the output voltage is theoretically analyzed.An improved droop control strategy based on the resistive virtual impedance and compensative virtual impedance is presented.The resistive virtual impedance achieves the power sharing and the compensative virtual impedance improves the dynamic characteristics of the DC microgrid.A small signal model of a simple DC microgrid is used to analyze the design process of the compensative virtual impedance parameters.Simulation and experimental results demonstrate that the proposed compensative virtual impedance can improve the dynamic characteristics of the DC microgrid and enhance the damping property.
|
|
Received: 08 June 2015
Published: 25 February 2016
|
|
|
|
|
|
[1] Li Y W,Kao C N.An accurate power control strategy for power-electronics-interfaced distributed generation units operating in a low voltage multibus microgrid[J].IEEE Transactions on Power Electronics,2009,24(12):2977-2988.
[2] Maouedj R,Mammeri A,Draou M D,et al.Grid converters for photovoltaic and wind power systems[J].Energy Procedia,2011,28(11):797-807.
[3] Kakigano H,Nomura M,Ise T.Loss evaluation of DC distribution for residential houses compared with AC system[C]//2010 International Power Electronics Conference,Sapporo,2010:480-486.
[4] Boroyevich D,Cvetkovic I,Dong Dong,et al.Future electronic power distribution systems a contemplative view[C]//2010 12th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM),Basov,2010:1369-1380.
[5] 吴卫民,何远彬,耿攀,等.直流微网研究中的关键技术[J].电工技术学报,2012,27(1):98-106.
Wu Weimin,He Yuanbin,Geng Pan,et al.Key technologies for DC micro-grids[J].Transactions of China Electrotechnical Society,2012,27(1):98-106.
[6] Cao X,Chen J,Xiao Y,et al.Building-environment control with wireless sensor and actuator networks:centralized versus distributed[J].IEEE Transactions on Industrial Electronics,2010,57(11):3596-3605.
[7] Wang B,Sechilariu M,Locment F.Intelligent DC microgrid with smart grid communications:control strategy consideration and design[J].IEEE Transactions on Smart Grid,2012,3(4):2148-2156.
[8] Jin C,Wang P,Xiao J,et al.Implementation of hierarchical control in DC microgrids[J].IEEE Transactions on Industrial Electronics,2014,61(8):4032-4042.
[9] Bryan J,Duke R,Round S.Decentralized generator scheduling in a nanogrid using DC bus signaling[C]//IEEE Power Engineering Society General Meeting,2004,1:977-982.
[10]陆晓楠,孙凯,Guerrero J M,等.适用于交直流混合微电网的直流分层控制系统[J].电工技术学报,2013,28(4):35-42.
Lu Xiaonan,Sun Kai,Guerrero J M,et al.DC hierarchical control system for microgrid applications[J].Transactions of China Electrotechnical Society,2013,28(4):35-42.
[11]Guerrero J M,Vasquez J C,Matas J,et al.Hierarchical control of droop-controlled AC and DC microgrids—a general approach toward standardization[J].IEEE Transactions on Industrial Electronics,2011,58(1):158-172.
[12]Kwasinski A,Onwuchekwa C N.Dynamic behavior and stabilization of DC microgrids with instantaneous constant-power loads[J].IEEE Transactions on Power Electronics,2011,26(3):822-834.
[13]Lu Xiaonan,Guerrero J M,Sun Kai,et al.An improved droop control method for DC microgrids based on low bandwidth communication with DC bus voltage restoration and enhanced current sharing accuracy[J].IEEE Transactions on Power Electronics,2014,29(4):1800-1812.
[14]Anand S,Fernandes B G,Guerrero M.Distributed control to ensure proportional load sharing and improve voltage regulation in low-voltage DC microgrids[J].IEEE Transactions on Power Electronics,2013,28(4):1900-1913.
[15]Huang H H,Hsieh C Y,Liao J Y,et al.Adaptive droop resistance technique for adaptive voltage positioning in boost dc-dc converters[J].IEEE Transactions on Power Electronics,2011,26(7):1920-1932.
[16]Kakigano H,Miura Y,Ise T.Distribution voltage control for dc microgrids using fuzzy control and gain-scheduling technique[J].IEEE Transactions on Power Electronics,2013,28(5):2246-2258.
[17]Khorsandi A,Ashourloo M,Mokhtari H.A decentralized control method for a low-voltage DC microgrid[J].IEEE Transactions on Energy Conversion,2014,29(4):793-801.
[18]Schonberger J,Duke R,Round S D.DC bus signaling:a distributed control strategy for a hybrid renewable nangrid[J].IEEE Transactions on Industrial Electronics,2006,53(5):1453-1460.
[19]Augustine S,Mishra M K,Lakshminarasamma N.Adaptive droop control strategy for load sharing and circulating current minimization in low-voltage standalone DC microgrid[J].IEEE Transactions on Sustainable Energy,2015,6(1):132-141.
[20]Khorsandi A,Ashourloo M,Mokhtari H.An adaptive droop control method for low voltage DC microgrids[C]//2014 5th Power Electronics,Drive Systems and Technologies Conference (PEDSTC),Tehran,2014:84-89.
[21]圣笛欧.开关变换器动态特性:建模、分析与控制[M].北京:机械工业出版社,2012.
[22]Rahimi A M,Emadi A.Active damping in DC/DC power electronic converters:a novel method to overcome the problems of constant power loads[J].IEEE Transactions on Industrial Electronics,2009,56(5):1428-1439.
[23]Nobrega T A P,Pagano D J,Lenz E,et al.Modeling and stability analysis of islanded DC microgrids under droop control[J].IEEE Transactions on Power Electronics,2015,30(8):4597-4607.
[24]Blasko V,Kaura V.A new mathematical model and control of a three-phase AC-DC voltage source converter[J].IEEE Transactions on Power Electronics,1997,12(1):116-123.
[25]Liu Jinjun,Feng Xiaogang,Lee F C,et al.Stability margin monitoring for DC distributed power systems via perturbation approaches[J].IEEE Transactions on Power Electronics,2003,18(6):1254-1261.
|
|
|
|
2016, Vol. 31 
