An approach for an efficient hybrid AC/DC solar powered Homegrid system based on the load characteristics of home appliances

Abstract In this paper, a new and efficient hybrid AC/DC solar powered Homegrid model is proposed based on the load characteristics of a typical set of home appliances working on a 220 V, 50 Hz system. The load characteristics of home appliances are represented by a static ZIP (constant impedance (Z), constant current (I) and constant power (P)) coefficient model, a useful load model in power flow studies. A Homegrid system is formed by analysing the distortion produced by modern household equipment, and a K-factor with a significant role in the overheating of residential/distribution transformers is determined. Further, the ZIP load model is validated by a simulation and the results are compared with experimental data. To improve the efficiency and quality of the traditional Homegrid system, a solar powered hybrid AC/DC supply network model is proposed. This system eliminates redundant power conversion stages and mitigates the loss due to the harmonics by a shift of harmonic intensive loads to the Direct Current (DC) network side. Its effectiveness has been investigated with a simulation in MATLAB as well as with hardware implementation. This proposed energy efficient Homegrid model could be quite helpful in fulfilling the idea of net zero or surplus energy buildings.

[1]  Rajiv K. Varma,et al.  Generalised model of a photovoltaic panel , 2014 .

[2]  Stewart Hardie,et al.  The effect of new residential appliances on Power Quality , 2010, 2010 20th Australasian Universities Power Engineering Conference.

[3]  Sakorn Po-Ngam,et al.  Simplified active power and reactive power control with MPPT for three-phase grid-connected photovoltaic inverters , 2014, 2014 11th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON).

[4]  Shira R. Horowitz,et al.  Forecasting residential air conditioning loads , 2014 .

[5]  I. Mansouri,et al.  Energy consumption in UK households: Impact of domestic electrical appliances , 1996 .

[6]  A. Moreno-Munoz,et al.  Distributed DC-UPS for energy smart buildings , 2011 .

[7]  Bidyadhar Subudhi,et al.  A Comparative Study on Maximum Power Point Tracking Techniques for Photovoltaic Power Systems , 2013, IEEE Transactions on Sustainable Energy.

[8]  E. F. Fuchs,et al.  Commentary on various formulations of distortion power D , 1999 .

[9]  B. T. Patterson,et al.  DC, Come Home: DC Microgrids and the Birth of the "Enernet" , 2012, IEEE Power and Energy Magazine.

[10]  Nafia Al-Mutawaly,et al.  Impacts of modern residential loads on power grids , 2014, 2014 IEEE 27th Canadian Conference on Electrical and Computer Engineering (CCECE).

[11]  J. Widén,et al.  A high-resolution stochastic model of domestic activity patterns and electricity demand , 2010 .

[12]  Francisco de Leon,et al.  Experimental Determination of the ZIP Coefficients for Modern Residential, Commercial, and Industrial Loads , 2014, IEEE Transactions on Power Delivery.

[13]  J. Widén,et al.  Constructing load profiles for household electricity and hot water from time-use data—Modelling approach and validation , 2009 .

[14]  Ewa Wäckelgård,et al.  A combined Markov-chain and bottom-up approach to modelling of domestic lighting demand , 2009 .

[15]  Jaume Salom,et al.  Analysis of load match and grid interaction indicators in net zero energy buildings with simulated and monitored data , 2014 .

[16]  Freyr Sverrisson,et al.  Renewables 2014 : global status report , 2014 .

[17]  Antonello Monti,et al.  Load Models for Home Energy System and micro grid simulations , 2012, 2012 3rd IEEE PES Innovative Smart Grid Technologies Europe (ISGT Europe).

[18]  Geert Deconinck,et al.  Residential Electrical Load Model Based on Mixture Model Clustering and Markov Models , 2013, IEEE Transactions on Industrial Informatics.

[19]  Mark Rylatt,et al.  A simple model of domestic lighting demand , 2004 .

[20]  G. Scelba,et al.  Performance comparison of phase looked loop algorithms applied to micro-inverters for distributed photovoltaic generation , 2013, 2013 15th European Conference on Power Electronics and Applications (EPE).

[21]  Vagelis Vossos,et al.  Energy savings from direct-DC in U.S. residential buildings , 2014 .