Indian Journal of Science and Technology

Abstract

Objective: Load modelling has a prominent place in present scenario of power systems research. In this paper various load models are considered for assessing maximum loadability using new algorithms. This has got a lot of significance in the voltage stability studies. Methods/Analysis: Generally constant representation of loads was considered. But the load characteristics significantly affect the power system’s performance. Constant models can not accurately describe the actual nature and behaviour of loads. Findings: Constant Power, Constant Impedance, Constant Current as well as composite (ZIP) load model are considered for assessing maximum loadability using a new algorithm. Constant Impedance, Constant Current Load models are established using node elimination technique. Application/Improvements: Case studies are conducted on IEEE 14 bus system with different load models and the test results are compared.
Keywords: Constant Current Model (I), Constant Impedance Model (Z), Constant Power Model (P), Maximum Loadability, ZIP Model