DETERMINATION OF ZIP COEFFICIENTS FOR RESIDENTIAL LOADS

Abstract

In this study, constant-impedance, constant-current and constant-power ZIP models have been analyzed for residental loads. Measurement based approach has been used to obtain ZIP models of selected loads. The measurement-based approach for load modeling is important because it reflects the real dynamics of the system and represents the load characteristics more accurately. The ZIP model is used to estimate the power drawn by the load depending on the voltage changes. Since the ZIP load model is a well-known model that provides power dependence in terms of the physical sense of voltage, studies are taking place in this area. In this study, the voltage and power values of selected residental loads at YTU Smart Home Laboratory are measured. Then, the ZIP coefficients have been calculated by using the least squares algorithm developed in MATLAB. The measured data is compared with the data from the obtained ZIP model for each appliance.  

Keywords

• Load models,ZIP model,residential appliances,least squares method

References

1. B. Zhao, Y. Tang, W. Zhang, and Q. Wang, “Modeling of common load components in power system based on dynamic simulation experiments,” in Proc. Int. Conf. Power Syst. Technol., 2010, pp. 1–7.
2. K. Rudion, H. Abildgard, Z.A. Styczynski ''Non-linear load modeling — Requirements and preparation for measurement,'' Power & Energy Society General Meeting, 2009, pp. 1–5.
3. M. Sadeghi and G. A. Sarvi, “Determination of ZIP parameters with least squares optimization method,” in Elect. Power Energy Conf., 2009, pp. 1–6.
4. A. Bokhari, A. Alkan, R. Dogan, M. D.-Aguiló, F. León, D. Czarkowski, L. Birenbaum, A. Noel, R. E. Uosef, ‘’ Experimental Determination of the ZIP Coefficients for Modern Residential, Commercial, and Industrial Loads’’, IEEE Transactıons On Power Delıvery, Vol. 29, No. 3, June 2014.
5. F. L. Quilumba, W. Lee, H. Huang, D. Y. Wang, and R. L. Szabados, “Load model development for next generation appliances,” in Proc. Ind. Appl. Soc. Annu. Meeting, 2011, pp. 1–7.