[BETA] Fortnightly

With large solar arrays and wind farms being proposed to connect to transmission and sub-transmission systems, are utility companies sufficiently prepared to handle the challenge of integrating these large intermittent resources? The industry now must decide whether transmission reliability factors — most notably dynamic voltage support and system frequency management — need to be resolved by renewable generators, or whether they should become a cost of doing business for transmission providers and reliability coordinators.

The electric utility industry is undergoing its most profound change since Thomas Edison and George Westinghouse battled over whether the American power system should be AC or DC. In essence, that technological choice shaped the industry we know today. Edison's low-voltage, DC system would have required many small generating stations and short distribution lines. The high-voltage Westinghouse AC system promoted development

of long-distance transmission networks that deliver electricity efficiently from large, remote power plants.