برنامه¬ريزي كوتاه¬مدت هماهنگ تعمير و نگهداري پيشگيرانه سيستم انتقال همراه با مدل پست¬هاي¬ 5/1 كليدي و بهينه¬سازي آرايش شبكه

Coordinated Short-Term Preventive Transmission System Maintenance Scheduling Considering the 1.5 CB Substations Model an‎d Network Topology Optimization

مهندسي برق

The deterioration an‎d failure of equipment in the transmission domain of power systems, like the generation domain, is an inevitable event. Preventive maintenance of transmission lines an‎d their associated equipment, from a reliability perspective, ensures the useful lifespan of all equipment in the long term. However, if the scheduled outage times for lines are not optimized, it can negatively affect network operation conditions, security, an‎d reliability indices related to consumers. The proposed PM scheduling model for transmission lines is a two-stage model. The first stage includes variables an‎d constraints related to maintenance scheduling, while the second stage addresses the constraints of network operation. Decision-making for determining the outage time of lines an‎d their equipment considers factors such as coordination capabilities among repair teams (line, substation, an‎d transformer), the availability of teams with different costs, prioritization of lines, an‎d other maintenance constraints in the first stage. The modeling of real network conditions in the second stage includes 1.5-key substations, the response of power plants to network power changes, optimization of network structure through switching an‎d congestion management, the impact of other areas on the scheduling scope, load shedding, an‎d the reduction of wind power generation. The proposed model aims to determine the optimal line outage schedule while minimizing operational costs an‎d unmet energy deman‎d. For numerical investigation, the proposed PM scheduling approach are applied to two sample transmission networks. Then, the PM scheduling problem has been solved using the CPLEX solver in GAMS. The Microsoft excel is utilized to han‎dle input data an‎d the simulation results. The first network is the IEEE 24-bus Reliability Test System, an‎d the second network is the transmission network of the central region of Isfahan province. To eva‎luate the effectiveness of the modeling, simulations were conducted under different comprehensive assumptions. A comparison between the performance of the proposed model an‎d the current maintenance scheduling program demonstrates the economic advantage of the proposed approach.

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