THE VALUE OF GRID-SUPPORT PHOTOVOLTAICS IN PROVIDING DISTRIBUTION SYSTEM VOLTAGE SUPPORT

摘要

Strategically sited grid-support photovoltaic (PV) applications have been proposed to provide distributed value (cost savings) to electric utilities experiencing transmission and distribution (T&D) system overloads. These applications can potentially defer capital upgrades, extend equipment maintenance intervals, reduce electrical line losses, and improve distribution system reliability. This research focuses on one aspect of the value of grid-support PV: the value to a substation transformer load tap changer. Results at Pacific Gas and Electric Company indicate that, due to the voltage support provided by the 0.50 MW PV plant at Kerman, California, the lifetime operation and maintenance costs of a transformer load tap changer at the Kerman Substation are reduced by $13,000. Although the method is generally applicable, the results are site specific.