APPLICATION OF BASECASE RESULTS TO INITIATE ITERATIONS AND TEST FOR CONVERGENCE IN A HYBRID COMPUTER ARRANGEMENT USED TO GENERATE RAPID ELECTRIC POWER SYSTEM LOADFLOW SOLUTIONS

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. Iterations are started with bus voltage values derived from a next earlier basecase loadflow solution. After the first and subsequent iterations, convergence is tested by the differences between specified bus voltages and the analog solution bus voltages.