基于改进役龄模型和全生命周期成本的继电保护装置服役年限确定

继电保护装置是电力系统的第一道防线,其合理的定期检修和退役对电网安全稳定运行和保证经济效益至关重要.基于具有线性衰减特性的役龄模型,结合继电保护装置的缺陷率特性曲线,同时计及继电保护装置的缺陷率和年均运行成本,在保证可靠性的前提下,以全生命周期年均运行成本最低为目标,构建了继电保护装置最佳服役年限确定模型.基于现场运行数据,对该模型进行了验证,得到了继电保护装置的最佳服役年限.结果表明该模型在继电保护装置检修技术改进或检修计划变更时,对确定继电保护装置最佳服役年限具有一定参考意义.

Determination of service life for relay protection device based on improved age-reduction model and life cycle cost

Relay protection device is the first line of defense for electric power system, its reasonable regular maintenance and decommission are essential for the safe and stable operation of power grid and the guarantee of economic benefits. Based on the age-reduction model with linear attenuation characteristics, combined with the defect rate characteristic curve of relay protection device, meanwhile taking the defect rate of relay protection device and annual average operating cost into account, pursuing the lowest life cycle annual average operating cost on the premise of ensuring reliability, a model of optimum service life determination for relay protection device is constructed. Based on the field operation data, the model is verified, and the optimum service life of relay protection device is obtained. Results show that the model has certain reference significance for determining optimum service life of relay protection device when improving the maintenance technology or adjusting the maintenance plan.