Golkar

A new method is presented for reducing the many complicated calculations of partial derivatives involved in the exact expression for incremental loss factors needed for economic load dispatching. Calculations of the partial derivatives of voltage phase angles with respect to plant power out put , which comprise the major obstacle to use the exact expression, are avoided by digital computer simulation of the mode of operation implied by the partial derivatives . These partial derivatives are shown to be independent of system generation schedules and load levels . Their values may be determined for one particular set of operating conditions and used thereafter to determine the most economic schedule of generation. The method gives very accurate values for the incremental loss factors for a voltage -controlled system . For a non - voltage - controlled system , the values appear to be as accurate as those determined by B coefficients calculated by the usual tensor method .