Analysis of ZIP load modeling in power transmission system

Abstract

A Static load model is a relation between measured voltage at a bus, active and reactive power consumed by the load connected at an instant. These models have an exponential or polynomial representation of load. In this paper, the load modeling is considered for constant impedance (Z), constant current (I), constant power (P) and ZIP. The proposed model is incorporated in Newton-Raphson (NR) power flow solution method and analyzed with a MATLAB program. Newton-Raphson (N-R) power flow technique is used for analyzing various load models on the transmission system. The proposed algorithm is tested on a standard 2-machine 5-bus system using MATLAB.