市场环境下发电厂商机组检修新策略

提出市场环境下基于单台机组弹性检修模型的发电厂商(generating company，GENCO)机组检修新策略。针对单台机组多出力运行状态，提出评估检修与否的两个经济指标：检修经济损失值Loss和运行风险损失值Loss,P，前者反映了机组检修时的经济损失，后者反映了继续运行时由于故障造成的风险损失，通过比较两者，便可确定单台机组的最优检修时段及可检修区间。根据该发电厂商中各机组的预期经济损失ELoss值确定其规划检修顺序，在单台机组的弹性检修模型基础上，依次确定各机组的检修时段。在该策略下，各机组不再按传统的固定时间间隔进行检修，确保了其安全经济运行，体现了发电厂商的市场主体地位。最后，用一个简单算例说明了该策略的合理性与有效性。

A Novel Unit Maintenance Strategy of GENCO in Power Market

A new strategy for unit maintenance of generating company (GENCO) in power market is presented, based on single-unit flexible maintenance model. Aiming at multi-output state, two economic indices are designated to assess whether unit should be outage for maintenance. One index is Loss, illustrating unit economic loss for maintenance, the other is Loss,P, illustrating unit risk loss for continued operation. The optimal maintenance time and maintenance interval can be got through comparison of Loss and Loss,P. For all units in GENCO, according to their expected economic losses-ELoss, a scheduled maintenance sequence can be acquired. Based on single-unit flexible maintenance model and scheduled sequence, all units in GENCO can be scheduled outage for maintenance. This new maintenance strategy, which is not based on fixed interval, can ensure economic benefit of GENCO as independent economic entity, and guarantee units operating safely and economically. At last, a simple case is used to testify the validity and rationality of this model.