Distributed energy resourcesProject Enhanced Reliability Through Short Time Resolution Data
This report provides an update on Solar Analytics’ Enhanced Reliability through Short Term Resolution Data around Voltage Disturbances project.
Data from distributed photovoltaic (DPV) systems connected to the National Electricity Market (NEM) around voltage and frequency disturbances was provided to AEMO for analysis so that a better understanding of fielded DPV response to various grid conditions could be achieved, enabling AEMO to update system models and make appropriate adjustments to system management to maintain system reliability through the rapid growth in DPV capacity.
The findings from this analysis include evidence of extensive disconnection of DPV in response to voltage disturbances. This can increase contingency sizes, and necessitate market intervention such as enablement of increased frequency reserves, or implementation of more stringent network constraints. Evidence was also found of failure of significant proportions DPV systems to correctly reduce output in response to over-frequency conditions.