Model considerations of simulating the transients of power system restoration

A new revision of NERC standard EOP-005-2 requires ISOs and TOs (transmission owners) to review and update power system restoration plans in a more timely manner following planned or unplanned network changes. Power system planning and operations face a higher level of challenge to conduct overall evaluation of power system steady state, dynamics and overvoltages during system restoration. This paper summarized industrial experience of transient network modeling specially required for restoration study, presented important factors affecting EMTP-type simulation, highlighted key modeling differences compared to power flow model and demonstrated simulation errors from commercial software which may inherently make incorrect assumptions.