基于设备可靠性的风电场预防性机会维修策略

Preventive Opportunistic Maintenance Strategy for Wind Farm Based on Ｒeliability of Electrical Equipment

摘要:

风电场电气设备如变压器、开关柜等均需定期进行停电检修或预试，会造成与其电气连接的风电机组陪停。 考虑电气设备及风电机组各主要部件的故障概率和维修机会，提出了基于可靠性的风电场预防性机会维修策略。该 策略在风电场电气设备实施预防性维修的基础上，对与待修电气设备直接相连的风电机组关键部件实施机会维修。 即当某电气设备可靠性降低到预防性维修阈值时，对其实施预防性维修，并核验与之直接相连的风电机组的关键部 件的可靠性，若某部件的可靠性达到机会维修阈值，则对其实施机会维修。通过对预防性维修阈值与机会维修阈值 的优化，使风电场发电损失和维修费用最小。最后，通过对风电场系统进行仿真，验证了所提出策略的有效性，该策略 可降低风电机组因不同原因造成的重复停运时间，为实现风电场智能化维护提供新的方法。

Abstract:

All of electrical equipment in wind farms，such as transformer and switchgear，need regular maintenance or pre － test，and then the wind turbines which connect with the electrical equipment have to stop． Considering the failure probability and maintenance opportunity of the main components of electrical equipment and wind turbines in wind farms，a preventive opportunistic maintenance strategy is proposed for wind farms based on reliability． On the basis of preventive maintenance of electrical equipment in wind farm，the strategy implements opportunistic maintenance for key components of the wind turbine which directly connects with the electrical equipment which need to be repaired． When the reliability of electrical equipment reduces to the preventive threshold，the preventive maintenance is implemented． Then，the reliability of components of the wind turbines which connect with the repaired equipment directly is checked． If the opportunity threshold is larger than the reliability，the opportunistic maintenance is implemented． Through the optimization of the preventive threshold and opportunity threshold，the power loss and maintenance cost of wind farm are minimized． Finally，the wind farm system is simulated to verify the effectiveness of the proposed strategy，which can reduce the repeated outage time of wind turbines，and provide a new means for the intelligent maintenance of wind farms