Abstract
Power flow (PF) is the foundation of many power system analyses essential for power system studies. The evolution of modern smart networks with increasing levels of integrated Distributed Generation, communication infrastructure, automation and control, requires accurate power flow analysis. The conventional PF assumes the power network and equipment has constant impedances despite resistance being a strong function of temperature. This means that the subsequent analyses undertaken have an inherent temperature dependent error. This error could be reduced by using the Temperature-Dependent Power Flow (TDPF) algorithm which estimates the network branch temperatures and adjusts the network impedances and outputs the PF. In this paper, the TDPF is derived in rectangular form and utilised to investigate the network voltage, branch power loss, and branch temperatures with integrated distributed photovoltaic systems. Simulation performed on the IEEE 14-bus network shows convincing results and the benefit of using the TDPF technique.
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