Impacts of photovoltaic power source intermittence on a distribution network

Abstract

The integration of the photovoltaic (PV) solar system to the existing distribution networks has brought new challenges to the network planners. One of the most interesting challenges is to prevent the impacts of the PV intermittent character on the steady state system operation conditions. So, the main aim of the present work is to investigate the effects of the PV power intermittence on voltage performance, conventional generator daily behavior and automatic voltage regulator operation. Simulations are effectuated on 33-bus IEEE radial distribution power system. And in order to provide a reliable study, a real PV power profile is adapted in this study. The considered network is modeled and simulated before and after the PV penetration and then a comparative study is established. Obtained results over a period of 24 hours revealed that the PV integration contributes to an enhancement of the overall voltage profile, a considerable saving in the total amount of the produced active power and a reduction of power losses; but on the other hand, the PV intermittent character causes significant transformation in buses voltages daily profiles as well as changes in production daily plan. To sum up, this paper reports the alterations, caused by the PV source intermittence, which must be taken into consideration by the distribution networks planners to maintain the overall network parameters within safe operating condition.