Evaluation of the impact of inertia on system operation cost

The inertia of the power system currently lies in a relatively narrow range. However, increasing penetration distributed energy resources (DERs) will significantly reduce level, meanwhile its volatility. This affect system’s ability to contain maximum frequency excursion and recover from large disturbances. In order maintain security stability, common practice is incorporate constraints into unit commitment (UC) model, so concern how volume volatility impact operation costs clearing prices. Furthermore, forecasting often required when performing day-ahead UC with constraints. Therefore, this paper aims evaluate on experiment designed under scenarios different volume, volatility, errors. results show that: 1) Increasing can effectively 2) lead an increase 3) increment cost caused by positive or negative errors asymmetric.