Reliability-BasedModel for Incomplete Preventive ReplacementMaintenance of Photovoltaic Power Systems  

作　　者：Wei Chen Ming Li Tingting Pei Cunyu Sun Huan Lei 

机构地区：[1]School of Electrical Engineering and Information Engineering,Lanzhou University of Technology,Lanzhou,730050,China

出　　处：《Energy Engineering》2024年第1期125-144,共20页能源工程（英文）

基　　金：This researchwas supported by the National Natural Science Foundation of China(Nos.51767017 and 51867015);the Basic Research and Innovation Group Project of Gansu(No.18JR3RA133);the Natural Science Foundation of Gansu(No.21JR7RA258).

摘　　要：At present,the operation and maintenance of photovoltaic power generation systems mainly comprise regular maintenance,breakdown maintenance,and condition-based maintenance,which is very likely to lead to over-or under-repair of equipment.Therefore,a preventive maintenance and replacement strategy for PV power generation systems based on reliability as a constraint is proposed.First,a hybrid failure function with a decreasing service age factor and an increasing failure rate factor is introduced to describe the deterioration of PV power generation equipment,and the equipment is replaced when its reliability drops to the replacement threshold in the last cycle.Then,based on the reliability as a constraint,the average maintenance cost and availability of the equipment are considered,and the non-periodic incomplete maintenance model of the PV power generation system is established to obtain the optimal number of repairs,each maintenance cycle and the replacement cycle of the PV power generation system components.Next,the inverter of a PV power plant is used as a research object.The model in this paper is compared and analyzed with the equal cycle maintenance model without considering reliability and the maintenance model without considering the equipment replacement threshold,Through model comparison,when the optimal maintenance strategy is(0.80,4),the average maintenance cost of this paper’s model are decreased by 20.3%and 5.54%and the availability is increased by 0.2395% and 0.0337%,respectively,compared with the equal-cycle maintenance model without considering the reliability constraint and the maintenance model without considering the equipment replacement threshold.Therefore,this maintenance model can ensure the high reliability of PV plant operation while increasing the equipment availability to improve the system economy.

关 键 词：RELIABILITY photovoltaic power system average maintenance cost AVAILABILITY incomplete preventive maintenance hybrid failure rate 

分 类 号：TM615[电气工程—电力系统及自动化]