Real Time Energy Management System and Control Strategy for DC Microgrid

This work is dedicated towards the design, configuration and ratings of various structural components of DC microgrid. Optimal voltage levels for DC distribution systems are also discussed based on efficiency studies of various converters. Real time energy management system (RTEMS) and controlling schemes are investigated for a grid tied DC microgrid comprising of various configuration blocks. The presented work deals with the dynamic controlling of intermittent power sources such as photovoltaic unit which increases the complexity of the integrated control algorithm. The proposed microgrid configuration and RTEMS is successfully implemented in RSCAD software. System dynamics originating due to variation in loading conditions, temperature and solar insolation are also observed and detailed in this work. Implementation of RTEMS ensures stable DC node voltages under such heavy transients. The power equilibrium is discussed for various system conditions.

[1]  Frede Blaabjerg,et al.  Overview of Control and Grid Synchronization for Distributed Power Generation Systems , 2006, IEEE Transactions on Industrial Electronics.

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

[3]  B. G. Fernandes,et al.  Optimal voltage level for DC microgrids , 2010, IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society.

[4]  Sharmila Ravula,et al.  A comparative study of DC and AC microgrids in commercial buildings across different climates and operating profiles , 2015, 2015 IEEE First International Conference on DC Microgrids (ICDCM).

[5]  Marian P. Kazmierkowski,et al.  Current control techniques for three-phase voltage-source PWM converters: a survey , 1998, IEEE Trans. Ind. Electron..

[6]  Tero Kaipia,et al.  An LVDC distribution system concept , 2008 .

[7]  Jeyraj Selvaraj,et al.  Multilevel Inverter For Grid-Connected PV System Employing Digital PI Controller , 2009, IEEE Transactions on Industrial Electronics.

[8]  Mayank Baranwal,et al.  A Distributed Architecture for Robust and Optimal Control of DC Microgrids , 2019, IEEE Transactions on Industrial Electronics.

[9]  Murti V. Salapaka,et al.  A robust scheme for distributed control of power converters in DC microgrids with time-varying power sharing , 2017, 2017 American Control Conference (ACC).