Abstract
A dynamic step voltage regulator (SVR) is proposed for an active distribution feeder in the presence of distributed photovoltaic (PV) systems to mitigate excessive tap operations during high PV variability period. Conventional voltage regulating devices, such as on load tap changers (OLTC), SVR, and capacitor banks need to be properly controlled and coordinated while interacting with the smart inverter functionalities to improve power quality, and overall system efficiency. The proposed dynamic regulator settings use a unidirectional communication link from the distribution management system to update its controller setpoints based on the solar and load forecasts to achieve the desired voltage profile throughout the feeder. In addition, reduction of voltage violation duration and network losses can be attained by implementing dynamic regulator settings. The proposed scheme is tested on a modified IEEE-123 bus test system with integrated PV systems and the performance under different system operation condition and smart inverter functions is evaluated.
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