基于机会维修的热电联产机组检修计划

Maintenance Optimization Based on Opportunistic Maintenance for Combined Heat and Power Unit

多能流耦合是综合能源系统的显著特点,当热电联产(combined heat and power,CHP)机组故障时,其影响会扩散传播到多个能源系统,因此,提高热电联产机组运行的可靠性非常重要。针对该问题,提出了一种基于机会维修的热电联产机组检修决策模型。首先,从机组供电和供热耦合机理出发,考虑不同设备间经济关联,推导了计及机会维修的热电联产机组供电和供热可用度表达式,在此基础上,为量化不同检修策略对系统运行的影响,综合考虑系统削减电负荷损失和热负荷损失,给出系统运行风险指标表达式,进一步,计及检修约束条件,建立热电联产机组检修决策模型。算例分析表明,所提模型能够提高热电联产机组运行的可靠性和系统整体效益。

Integrated energy system is composed of multiple energy systems.When a combined heat and power unit fails,more than one energy systems can be influenced.Therefore,it is very important to improve the reliability of CHP.In this paper,we propose a maintenance decision model for CHP based on opportunistic maintenance.Firstly,the expression of the availability of CHP considering opportunistic maintenance is derived.And then,in order to quantify the impact of different maintenance strategies on system operation,system operation risk is given,taking electric load loss and heat load loss into account.Finally,maintenance decision model of the CHP is established with maintenance constraints.The model is solved by genetic algorithm.Case studies show that the model can optimize CHP maintenance strategy and improve the reliability of CHP and the overall system efficiency.