Investigation the impacts of CRI on security-constrained preventive maintenance scheduling

Preventive maintenance scheduling (PMS) of generating units is addressed as a long-term scheduling in power system studies which ensures a reliable supply of demand and economical operation of power systems. In this paper, a new structure of security-constrained PMS associated with a novel cost reduction index (CRI) is developed. CRI encourages generating units to be placed in a desirable situation while determining the most appropriate maintenance scheme and generation pattern. In this paper, a new linearized formulation for cost-based preventive maintenance scheduling associated with the CRI is presented. Here, the proposed framework is structured as mixed integer programming (MIP) problem and solved using CPLEX solver. This model would schedule maintenance scheme and commitment status of generating units while the system total cost including maintenance, operation and reserve expenditures is minimized. Values of energy and reserves over the scheduling time horizon are also determined simultaneously in this paper. The IEEE reliability test system (RTS) is utilized to demonstrate the effectiveness of the proposed structure.