Energy Savings in Radial Distribution Systems with Intermittent Wind Power and Probabilistic Load Demands

This paper discusses the energy savings in radial distribution systems with wind turbine integration with probabilistic load power demands. The energy savings are determined by calculating the difference cost of energy losses of the distribution system without and with the wind power source. Deterministic load flow (DLF) studies do not incorporate the randomness of the load power demands. The probabilistic load flow (PLF) method incorporates this randomness to provide more realistic and accurate results regarding the performance of the system. In this paper, the load and the substation voltages of the distribution system are considered as random variables for the calculation of energy savings. The main contributions of this paper are: i) Comparison of annual energy savings and cost of energy losses obtained using DLF and PLF calculations ii) Analysis of 24 hour energy savings of radial distribution systems with the integration of wind turbines using practical 24 hour wind data iii) Comparison of energy savings of radial distribution systems for winter and summer seasons. The comparison of energy loss savings is done on deterministic and probabilistic platforms. The study is conducted for winter and summer seasons using the corresponding hourly wind data for both seasons and hourly load demand curves for both seasons. This study can help extensively in the realistic analysis of radial distribution systems with renewable integration. The results are obtained for a standard IEEE 33 bus radial distribution system. (C) 2016 The Authors. Published by Elsevier Ltd.