Publications Details

Synchrophasor-Based Zonal Current Differential Protection for Secondary Low Voltage Networks

Cheng, Zheyuan; Pagano, John; Udren, Eric A.; Holbach, Juergen; Khani, Hadi; Reno, Matthew J.

This report describes an approach to utilizing phasor measurement unit (PMU) data from multiple Intelligent Electronics Devices (IEDs) in a low-voltage network to produce a differential scheme for protecting the medium-voltage feeder and low-voltage network transformers. The proposed protection scheme is designed and prototyped on a real-time automation controller. Its performance is evaluated using real-time controller hardware-in-the-loop simulation. Lab testing results indicate that the proposed protection scheme allows significant distributed energy resources (DER) backfeed and enables selective and fast protection of medium voltage feeders.