K. Horowitz, Z. Peterson, M. Coddington, F. Ding, B. Sigrin, D. Saleem, S. E. Baldwin,
B. Lydic, S. C. Stanfield, N. Enbar, S. Coley, A. Sundararajan, C. Schroeder, Apr
2019, An Overview of Distributed Energy Resource (DER) Inter- connection: Current
Practices and Emerging Solutions, Technical report, nrel/tp-6a20-72102, pp. 1-84