8PUTTGEN H B, MACGREGOR P R, LAMBERT F C. Distributed generation: semantic hype or the dawn of a new era? IEEE Power and Energy Magazine, 2003, 1(1): 22-29.
9Distributed energy resources: current landscape and a roadmap for the future. Palo Alto, CA, USA: EPRI, 2004.
10Renewable energy technical assessment guide TAG RE. Palo Alto, CA, USA.. EPRI, 2005.