2The Nature of Loads

The modeling and analysis of a power system depend upon the “load.” What is load? The answer to that question depends upon the type of the analysis that is desired. For example, the steady-state analysis (power-flow study) of an interconnected transmission system will require a different definition of load than that is used in the secondary analysis in a distribution feeder. The problem is that the “load” on a power system is constantly changing. The closer you are to the customer, the more pronounced will be the ever-changing load. There is no such thing as a “steady-state” load. To come to grips with a load, it is first necessary to look at the “load” of an individual customer.

2.1 Definitions

The load that an individual ...

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