Evaluation of Cellular Based DER Direct Transfer Trip (DTT) Technologies

In recent years Direct Transfer Trip (DTT) over commercial cellular communication network is drawing more attention as an alternative to fiber and private copper line due to its lower cost and availability. This paper presents the cellular based DTT topologies, key components, and overall system architectures. In addition, a commercial solution has also been commissioned and evaluated at EPRI laboratory. DTT trip times are measured under various operating conditions. Finally, selected utility pilot projects are listed to provide examples of the technology adoption landscape.