부산대학교 도서관

In order to reach global objectives of minimizing environmental impacts attributed to power systems, further implementation of renewable energy sources is necessary. However, planning high penetration of renewables presents new control challenges for current power systems since most new technologies are power electronics based. This paper presents a methodology to evaluate possible control issues and solutions to guarantee system wide stability and identify weak points under high penetration of IBRs. The methodology uses both transient stability and system strength assessment of existing and planned IBR installations. Several system strength metrics are computed considering N-0 and N-l contingencies. For the transient stability analysis, key parameters of the IBR dynamic model are adjusted to identify possible stability issues by the simulation of selected contingencies. The methodology identifies weak points in the power grid and control settings in the power plant and inverter controllers that negatively affect system stability. This methodology was evaluated with information from a utility company. The results suggest future points that require additional studies and a list of recommendations to include in stability guidelines for the secure interconnection of new IBRs in the Bulk Power System.