DER integration in US grid faces challenges

摘要

The US electric industry is "a long way" from being able to integraterndistributed energy resources into the bulk electric system, attendeesrnof PJM's Grid 20/20 symposium in Chicago learned Wednesday.rnWhile behind-the-meter resources such as combined heat andrnpower, rooftop solar, cogeneration systems, back-up reciprocatingrngenerators and batteries have been proliferating across the US, therninterface between transmission system operators and distributionrnsystem operators has not kept pace, partly because that interface wasrnestablished as a one-way relationship, from centralized generationrnthrough transmission systems to distribution systems, said DavidrnOwens, executive vice president of the Edison Electric Institute'srnBusiness Operations Group and Regulatory Affairs.