When I volunteered to work on the North American Energy Standard Board (NAESB) demand-side management (DSM) measurement and verification (M&V) effort, I thought the definition of demand response (DR) was pretty simple: measures that reduce demand, on command. As I examined the issue, I realized that it was far more complex than I first thought, that different people used different names for different activities, and that names mattered. When you peruse various documents from the Federal Energy Regulatory Commission (FERC), the North American Electric Reliability Corp. (NERC), independent system operators (ISOs), state agencies or private groups, it becomes obvious that there are no generally accepted definitions for many terms used in the industry. DR, load management, smart grid, etc., often have different meanings for different groups.
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