by K. Dartawan, R. Austria
What is Distributed Generation (DG)? Unlike big generation stations connected directly to the utility’s transmission grid, DG is typically smaller, about 10 MW or less connected to the distribution network or customer side. The DG could be fueled by renewable sources such as photovoltaic (solar), wind, bio mass or could be non-renewable energy such as diesel or gas.
by E. Cano, K. Dartawan, R. Austria
One potential impact of interconnecting distributed generation (DG) is the potential sympathetic tripping of overcurrent (OC) protection devices, where a healthy feeder trips unnecessarily for a fault on another feeder. The sympathetic tripping comes from DG with high short-circuit current contribution (typically rotating machines such as Diesel or Gas Turbine units) and can be observed in radial feeders that are fed from a common source.
Also, this issue applies to DG on a lateral-backfeed from the DG to the adjacent lateral circuit.
Most common low voltage problems in distribution systems can be addressed by installing capacitors. But, how to optimally place and size the capacitors? And how would the capacitors impact the system due to harmonics and switching transients? In this article, we propose to address these questions.