Decision-making Research Based On The Total Life Cycle Management Of Substation Operation Cost

Transformer Substation,as the node of power generation,transmission,distribution and power consumption,is an important equipment to realize power dispatching,transmission and distribution.There are many kinds of substation equipment,large construction investment and high operation cost.At the same time,modern consumers'awareness of safeguarding their rights is increasing,which also has higher requirements for the reliable operation of power grid equipment.Therefore,before the construction of substation projects,how to choose the construction scheme which meets the technical requirements and lowest cost has become a problem that power grid enterprises need to attach great importance to.In this paper,the theory of life cycle cost management is applied to the cost management of substation project,and theoretical research and practical exploration are carried out.The so-called life cycle cost(LCC)management of substation project is a management concept which considers the comprehensive benefits of its life cycle(including the whole process from pre-project,construction to return)on the premise of satisfying reliability.Applying it to management decision-making can ensure the reliability of substation project operation and make the substation economy optimal.The traditional project plan decision-making is based on the quota to compare the cost of the construction stage,only considering the economic factors,not the technical factors.Important technical factors such as reliability and safety are introduced in substation long-term operation to improve the accuracy of scheme selection.In this paper,the method of multi-objective decision-making is adopted in the decision-making of project construction scheme,and the decision-making model of economic-technical scheme is established.The index is scored by expert opinion method.The weight of each evaluation index is determined by analytic hierarchy process,and the correlation degree between alternative scheme and target scheme is determined by grey correlation analysis method.It is helpful for decision makers to quickly and objectively identify the best scheme of substation project The economic-technical scheme decision-making model is validated by an example of Huzhuang 110 KV substation capacity-increasing transformation project.The whole process cost comparison results of the traditional scheme selection in the construction stage and the life cycle cost comparison results are compared,which proves the superiority of the decision-making model.Finally,the control strategy based on LCC theory is put forward to power supply enterprises,which plays a guiding role in the practical application of LCC theory.