A Study on the Differentiated Application of a Generic Scheme for Main Wiring Based on the Whole Life Cycle

Based on the theory of life cycle cost (LCC), the economic, safety and social benefits of 110kV outdoor HGIS and GIS substation are comprehensively evaluated in order to optimise the selection decision of power distribution equipment. The LCC mathematical model is constructed, and the whole life cycle cost (LCC) of the two options is quantitatively measured and comparatively analysed in terms of initial investment, operation, maintenance, failure and decommissioning disposal. The results show that the initial investment cost of the HGIS scheme is slightly higher than that of the GIS, but its operation cost is basically the same, the maintenance and fault repair cost is significantly lower than that of the GIS, and the decommissioning cost is also more advantageous. Within 40 years of operation, the whole life cycle cost of the HGIS scheme is lower than that of the GIS scheme by about 3 million RMB, which shows a better economic performance. The study shows that the application of LCC calculation method in the optimisation of general design scheme of power distribution equipment is of great value, which can provide a scientific basis for the economic decision-making of electric power engineering projects, improve the investment efficiency and operation efficiency of power grid construction, and promote the sustainable development of the industry.