The Effect of Inaccurate Load Composition on Power System Contingency Analysis and Planning

Power systems are experiencing major changes in their structure and operation that make them more complex in nature. Further, the ever-increasing electricity demand along with the high penetration of renewable energy sources push the power systems to work closer to the system limits. In this sense, there is a need for accurate analysis for assessing the power system operating condition. Since the loads are a source of uncertainty in the power system analysis, in this work an extended investigation of the effect of the inaccurate load composition on the frequency response of the system is performed. The composite load model is used to represent the loads on the IEEE 39-bus dynamic test system in which a protection scheme was added, including a high penetration of renewable energy sources is assumed in order to have a more realistic representation of the current power system case. The aim of this work is to underline the importance of the accurate load composition for contingency analysis and system planning.© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, in-cluding reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to serv-ers or lists, or reuse of any copyrighted component of this work in other works. E. Polykarpou, M. Asprou and E. Kyriakides, "The Effect of Inaccurate Load Composition on Power System Contingency Analysis and Planning," 2019 IEEE Milan PowerTech, Milan, Italy, 2019, pp. 1-6. doi: 10.1109/PTC.2019.881082