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Adding photovoltaic (PV) systems in distribution networks, while desirablefor reducing the carbon footprint, can lead to voltage violations under highsolar-low load conditions. The inability of traditional volt-VAr control ineliminating all the violations is also well-known. This paper presents a novelcoordinated inverter control methodology that leverages system-wide situationalawareness to significantly improve hosting capacity (HC). The methodologyemploys a real-time voltage-reactive power (VQ) sensitivity matrix in aniterative linear optimizer to calculate the minimum reactive power interventionfrom PV inverters needed for mitigating over-voltage without resorting toactive power curtailing or requiring step voltage regulator setting changes.The algorithm is validated using the EPRI J1 feeder under an extensive set ofrealistic use cases and is shown to provide 3x improvement in HC under allscenarios.

Improving Photovoltaic Hosting Capacity of Distribution Networks with Coordinated Inverter Control -- A Case Study of the EPRI J1 Feeder