ABSTRACT
This is the second of two chapters on how weather influences demand and the analytical and planning issues associated with that relationship. It could also be characterized as “advanced weather-demand analysis” building on the “basic” material covered in Chapter 5. That chapter examined how weather influences electric load and looked at analytical methods to identify the relationship between weather and load, and use it to improve planning. This chapter looks at one aspect of weather in more detail-extreme weather, those conditions when it creates very high loads. It also examines weather’s influence on electric demand from two other perspectives-that of the annual load duration curve and daily load curves. Both are necessary to build toward using the knowledge of weather and load in planning. Finally, the chapter addresses weather design criteria-how utility planners use their knowledge of weather in setting target loadinٳ levels for the system and in assuring the system can handle the loads created by extremely hot and cold weather.
