Automated System Operating Limit determination with Remedial Actions at CAISO using Python

Abstract

Determining transfer limits into California over significant bulk electric system transmission corridors is an integral part of operations planning, outage management and real-time operations in the event of contingencies or forced outages at California ISO (CAISO). These time consuming analyses are complicated by the need to model contingencies that change based on various Remedial Action Schemes actions that could occur and change due to system conditions, interface or path flows, generating-pumping conditions and also change while stressing paths to determine SOLs. This paper presents the design and implementation of a comprehensive framework using Python and GE Positive Sequence Load Flow (PSLF) to automate System Operating Limits determination based on thermal and voltage criterion for offline operations planning and outage studies and for obtaining path SOLs based on system conditions.