Voltage Profile Improvement in Distribution Network Under Transient Solar Radiation Conditions

Integration of large scale of distributed photovoltaic (PV) generation resources in the distribution network can lead to technical challenges, particularly voltage rises caused by PVs power injection at the time of high solar radiation profile and low load demand. It is imperative important to apply control functions according to power rating of PV inverter, when their capacities are in wide range. Advanced controls like volt-var and volt-watt could allow the PV inverters gradually reduce their real power output as a function of measured bus voltage and provide reactive power support to maintain the network voltage within constraints. The study is performed to analyse voltage distribution profiles across the feeder nodes in real-time environment, wherein, PV systems integrated in IEEE 13 bus distribution network, in real-time simulation (RTDS) with control functions performed using volt-var control (VVC) and volt-watt control (VWC).