Coordination of generation maintenance scheduling and long-term SCUC with energy constraints and N − 1 contingencies

This study presents a closed-loop coordination mode and model between generation maintenance scheduling (GMS) and long-term security-constrained unit commitment (SCUC) considering energy constraints and N − 1 contingencies that aims at improving the security and economy of power system operations. Given the calculation complexity, this study employs constraint transformation techniques and an efficient approach termed the relaxation induced method, which is based on the solution of the relaxed mixed-integer programming (MIP) model. The proposed approach can quickly obtain a near-optimal solution. If the near-optimal solution is not acceptable for system operators, it can be used to warm-start the solution of the original MIP problem. The modified IEEE 30-bus test system and a provincial power system in China are employed to demonstrate the effectiveness of the proposed model and algorithm.