The impact of line resistance on load sharing and an improved droop control of DC microgrid

This paper proposes an effective DC voltage and power sharing droop control structure for DC microgrid based on public bus voltage feedback signal. Firstly, the impact of the line resistance on power sharing among droop controlled distributed generators is analyzed and the reason why the line resistance cannot be ignored is presented. Then, an improved droop control is proposed. The simulation test based on MATLAB/Simulink was implemented to demonstrate the proposed approach.

[1]  R. Adapa,et al.  Expandable multiterminal DC systems based on voltage droop , 1993 .

[2]  Lu Jiming.  Operation and Control of DC Distribution System , 2012 .

[3]  Juan C. Vasquez,et al.  Hierarchical Control of Droop-Controlled AC and DC Microgrids—A General Approach Toward Standardization , 2009, IEEE Transactions on Industrial Electronics.

[4]  Seyed Mahdi Ashabani,et al.  New Family of Microgrid Control and Management Strategies in Smart Distribution Grids—Analysis, Comparison and Testing , 2014, IEEE Transactions on Power Systems.

[5]  Alvaro Luna,et al.  A generalized voltage droop strategy for control of multi-terminal DC grids , 2013, 2013 IEEE Energy Conversion Congress and Exposition.

[6]  C. Marnay,et al.  Shape of the microgrid , 2000, 2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194).

[7]  Jan T. Bialasiewicz,et al.  Power-Electronic Systems for the Grid Integration of Renewable Energy Sources: A Survey , 2006, IEEE Transactions on Industrial Electronics.

[8]  A. Sannino,et al.  Feasibility of a DC network for commercial facilities , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[9]  Sun Yuanzhang.  A Control Strategy for Multi-infeed VSC-HVDC Systems , 2009 .

[10]  Ai Qian.  Modeling of DC micro-grid and stability analysis , 2010 .

[11]  Bo Zhao,et al.  Integrated Microgrid Laboratory System , 2013, IEEE Transactions on Power Systems.

[12]  F. Blaabjerg,et al.  Power electronics as efficient interface in dispersed power generation systems , 2004, IEEE Transactions on Power Electronics.

[13]  A. Sannino,et al.  Low-Voltage DC Distribution System for Commercial Power Systems With Sensitive Electronic Loads , 2007, IEEE Transactions on Power Delivery.

[14]  Qing-Chang Zhong,et al.  Robust Droop Controller for Accurate Proportional Load Sharing Among Inverters Operated in Parallel , 2013, IEEE Transactions on Industrial Electronics.

[15]  N. Hatziargyriou,et al.  Making microgrids work , 2008, IEEE Power and Energy Magazine.

[16]  A. Sannino,et al.  An Adaptive Control System for a DC Microgrid for Data Centers , 2007, IEEE Transactions on Industry Applications.

[17]  T. M. Haileselassie,et al.  Impact of DC Line Voltage Drops on Power Flow of MTDC Using Droop Control , 2012, IEEE Transactions on Power Systems.

[18]  T.C. Green,et al.  Modeling, Analysis and Testing of Autonomous Operation of an Inverter-Based Microgrid , 2007, IEEE Transactions on Power Electronics.