SYSTEM AND METHOD FOR CONVERGING ITERATIONS IN A HYBRID LOADFLOW COMPUTER ARRANGEMENT

摘要

A hybrid loadflow computer arrangement includes an analog network simulator and a digital computer which acquires and processes on-line data and operator data related to the power system for which a loadflow problem is being solved. The analog simulator includes modular circuits representative of power system busses and lines and the interface between the digital computer and the analog network simulator is provided by analog-to-digital and digital-to-analog converters and by line outage contact closure outputs. The hybrid arrangement operates iteratively, with the analog network simulator providing a bus voltage solution for a set of network simultaneous equations and the digital computer providing bus load and generation injection current calculations and convergence steering control. To converge the solution, the digital computer is programmed to change the generation reactive power at voltage regulated busses in each iteration as a function of the difference between the analog computed bus voltage and a specified bus voltage.