ESTIMATION OF PV LOCATION IN DISTRIBUTION SYSTEMS BASED ON VOLTAGE SENSITIVITIES

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Gomez Peces, Cristian
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Abstract
High penetration of solar photovoltaics can have a significant impact on the power flows and voltages in distribution systems. In order to support distribution grid planning, control and optimization, it is imperative for utilities to maintain a database of the location and sizes of PV systems. This research describes an efficient method to determine the location of solar PV systems in distribution circuits, based on voltage magnitude measurement streams. The algorithm leverages the expected impact of solar injection variations on circuit voltages and takes into account the operation and impact of changes in voltage due to discrete Voltage Regulation Equipment (VRE). The estimation model enables recovering the most likely location of PV systems, as well as voltage regulator tap and switching capacitors state changes. The method has been tested on individual and multiple PV system, using the Chi-Square test as a metric to evaluate the goodness of fit. Simulations on the IEEE 13-bus and IEEE 123-bus distribution feeders demonstrate the ability of the method to provide consistent estimations of PV locations and VRE actions.
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2020-12-07
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