Modeling and evaluation of the system reliability effects of direct load control

Direct load control, a form of load management in which portions of the system load are under the direct operational control of the utility, is discussed. The load can be modified, within limits, to match the available generating capacity, thereby minimizing the occurrence of uncontrolled load loss. Accordingly, direct load control renders the system load a function of available system capacity. Therefore, accurate modeling of system reliability effects of direct load control requires that the temporal correlation between system load and available generating capacity be preserved. This is most readily done using Monte Carlo simulation. A Monte Carlo simulation model and results obtained with it are described