Transmission line life cycle management?

Transmission line life cycle management specifically what is included, the following Zhongda consulting bidding teacher for you to answer for reference.

In recent years, the State Grid Corporation has actively promoted the full life cycle management of construction projects, combined with the results of engineering design research, in accordance with the concept of the full life cycle, the development of transmission line engineering full life cycle design direction and requirements, aimed at actively promoting the application of full life cycle management in the electric power enterprise. Vigorously promoting the whole life cycle management will certainly lead the new direction of power grid construction and development, and drive the innovation of enterprise asset management concept.1 Overview of the theory of the whole life cycle management1.1 Connotation of the whole life cycle managementThe whole life cycle management refers to the long term economic benefits of the project from the perspective of the comprehensive consideration of the various stages of the project in the planning, design, construction, operation, maintenance, updating, and the final end-of-life to realize the benefits maximization in the whole process. the whole process to maximize its benefits. The method based on the whole life cycle management will make the project more reasonable in cost and more efficient in the whole life cycle, so as to achieve the purpose of sustainable development and improve the efficiency of the project.1.2 Characteristics of the whole life cycle management (1) Systematic. The whole life cycle management of the project is not a separate isolated project, it is a systematic project, a whole with multiple control factors linked together, only systematic and scientific management can ensure the realization of the final goal. (2) Multi-stage. Project life cycle management in the project throughout the life cycle process is divided into different phases, life cycle management requires a good continuity of work at all stages, so that the specific work of each stage is linked to realize the integration of the management process. (3) Multi-subject. The whole life cycle management cost of the project involves more subjects, including investors, builders, suppliers, commissioners, consumers and other subjects, who are interconnected and constrained. (4) Complexity. The whole life cycle management of the project is not only the management of the project decision-making and construction phase, but also the management of the project in the use of the operation phase of the maintenance, etc., these factors will make the whole life cycle management of the project more complex than the previous traditional management, and from the project project, the design phase should be predicted throughout the whole life cycle cost of the project.1.3 The Core Theory of the Whole Life Cycle Management Whole Life Cycle Cost (LCC), refers to the sum of the costs incurred in the project life cycle, that is, the total cost of the project. The whole life cycle cost of transmission line project is the total cost of each stage and each element of the life cycle of the construction of transmission line project, and its cost is analyzed and studied through certain technical methods, and corresponding measures are taken so as to realize the optimal whole life cycle cost of the transmission line project. The transmission line construction project can be divided into construction stage and operation and maintenance stage according to the stage, and its corresponding cost is construction cost and future cost. The construction stage includes project planning, design and construction, and the corresponding costs are called construction costs; the operation and maintenance stage includes the use and recycling or scrapping stage, and the costs to be incurred in the future, including operation and maintenance costs, recycling or scrapping costs, etc. are called future costs.1.4 The significance of the whole-life-cycle management Applying the whole-life-cycle management model in the construction of transmission line projects is fully in line with the national proposal of saving society, and is in line with the national proposal of saving society, and is fully in line with the national proposal of saving society. It is fully in line with the concept of saving society put forward by the state, and also in line with the business philosophy of the State Grid Corporation, which is of great significance, mainly in the following aspects: it is conducive to the formulation of practical objectives; it is conducive to improving the safety and reliability of the project; it is conducive to the realization of the project's saving and environmental protection; the whole life cycle management of transmission line project is a key initiative to improve the quality of assets and extend the service life of equipment; it is conducive to the maximization of the overall interests of power enterprises. Maximize the overall interests of electric power enterprises. 2 Transmission line project cost management deficiencies 2.1 Decision-making basis is insufficient At present, in the construction of transmission line project, the basis for decision-making is often too much attention to the capital investment in the project this indicator, and the future operation and maintenance investment is not enough to pay attention to, which is very likely to cause the line in the early stage of the basic investment in the line is less than a huge investment in the future operation and maintenance investment, so that the line project in the whole life cycle of the project. Line project in the whole life cycle of the cost is greatly increased, so the current decision-making basis for the inadequacy of the concept of life cycle to be improved through the whole life cycle. 2.2 Inadequate engineering supervision system currently in the construction of transmission line project, supervision of the work only stays in the level of quality inspection, the implementation of the project in the process of specific matters of management is not enough, which is also the current system of supervision of the inadequacy of the project. This is also the inadequacy of the current project supervision system, to be improved later. 2.3 Inadequate limit design system currently in the construction of transmission line project, the starting point of its limit design is good, but often ignored the different projects with different site conditions, a focus on the limit is easy to limit the design of the designers of the design thinking, so that the rationality of the design is greatly reduced, resulting in a number of negative impacts. Therefore, the rationality of the limit design system also needs to be further explored. 2.4 Insufficient cost estimation research in the production and operation stage At present, in the construction of transmission line project, the research on the future operation and maintenance cost is not in-depth enough, and often only stays on the surface of the study, which brings a lot of problems to the basis of decision-making of the project, and in the feasibility of the project to this aspect is even more rough, the operation and maintenance cost does not have a very precise and accurate. The operation and maintenance costs do not have a very precise calculation, which results in loopholes in the whole life cycle management and brings challenges to the whole life cost estimation of the transmission line project. Therefore, the cost estimation research in the production and operation stage still needs to be strengthened to further play its role in the whole life cycle management of transmission line projects.3 The application of whole life cycle cost in the design of transmission line projectsTransmission line project design should be based on the theory of whole life cycle management, combined with the actual situation of the project to carry out the optimal design of whole life cycle cost. Mainly in the path selection and recommended programs, meteorological and environmental conditions, conductor selection, tower planning and tower form selection, foundation form selection and optimization, insulation with, operation and maintenance and other aspects of the design and analysis.3.1 Path selection from the point of view of reducing the cost of the project, and the rational and scientific use of line corridors line selection principles, as far as possible, to avoid the adverse geological areas (coal mine, iron ore mining areas, mining areas), Bad climate area, forest area and other lots, hydrology and meteorology lots, to improve the ability and level of the project to withstand natural disasters and sudden accidents, avoiding the facilities that jeopardize the safe and reliable operation of the line, and reducing the negative impacts of line construction on local planning and other facilities. Where avoidance is not possible, various technical measures will be taken to ensure the safe operation of the line. In accordance with the theory of full life cycle cost, the relationship between the appropriate construction cost and operation and maintenance cost and future revenue is considered from the whole life process. For the construction of the line itself, the construction standard should be raised, and even if the cost of bypassing is slightly higher than the sum of crossing and treatment costs, the bypassing program should be chosen, only in the specific increase in investment programs, according to the results of the feasibility study stage of the trekking survey, by the owner, the operator, the design side of the comprehensive consideration of the future costs and benefits of the renovation of the possible, for the possible large number of residential houses concentrated in the demolition of demolition, factory demolition, and the agreement of the possible difficulties of the The owner, the operator and the designer will consider the future reconstruction cost and benefit, and put forward 2-3 options for the possible mass demolition of houses, factories and difficult agreements, and determine the final plan with the maximum investment return. 3.2 Geological Study Based on the concept of whole life cycle management, the owner and the designer should carry out on-site surveys along the route in the pre-design stage to preliminarily find out the topography and geomorphology of the route, geological structure, distribution of stratum lithologies and special soils, and the undesirable geologic effects of landslides, mudslides, and to carry out geotechnical engineering evaluation. Engineering evaluation; identify the situation of mine pressure and mining along the route, the groundwater burial conditions at the maximum freezing depth of the foundation soil along the route, and preliminarily evaluate its corrosive properties, so as to provide a basis for the selected path program; and provide the main physical and mechanical property indexes and parameters for the actual design. Avoid the secondary design and construction caused by the inconsistency between the design and the actual geological conditions, effectively save resources, and reduce the investment of manpower, material and capital.3.3 Hydrological research site investigation should be on the line across the river between the two sides of the vertical width of the river, diagonal span width, and the height difference between the river bottom, the sandy composition of the riverbed, the height of the cans between the banks, and the river's maximum depth of inundation, etc., measurements and analysis, and adjust the design scheme to prevent flooding caused by natural disasters. 3.4 Meteorological study Based on the guiding principle of whole life cycle, the meteorological field survey is conducted at the early stage of design, data is collected, and the design wind speed and conductor icing condition at the line are studied by combining mathematical and statistical methods to provide an effective basis for the actual design, and the theory is integrated with the actual design to provide an effective basis for the design. The actual design provides an effective basis for theory combined with practice, reducing the difficulties of operation and maintenance, and enhancing the safety and reliability of the line.3.5 Conductor-ground line selection Considering the factors of the whole life cycle management, the selection of the conductor not only ensures the operational safety, but also requires reasonable technical and economic indicators. Usually, with the increase of transmission capacity, the resistance loss of the conductor increases, so it is preferable to choose a larger cross-section area of the conductor, but also combined with the initial investment and the annual cost of loss for comprehensive consideration. Adopting annual cost minimization method, conductor type is compared economically.3.6 Tower planning and tower type selectionAccording to the flat cross-section diagram, combined with the mapping measurement of the site survey, the cross position and height of the main crossings such as major highways, power lines, communication lines, etc. are added to provide relatively accurate cross-section data for the optimization of the tower alignment. Combined with the whole life cycle theory, the unconstrained optimization scheduling, optimization scheduling goal is to meet the technical conditions to make the lowest cost of the project. Then, under the same target conditions, the optimization results are used to plan the horizontal load, vertical load, tower height, line angle and tower head gap of the tower using the mathematical method of golden section. The planning can be completed according to the requirements of a tower, two towers, three towers, four towers, five towers, six towers series of programs such as planning, the more the series of tower programs, the lower the overall cost. But when the tower program, the more tower weight and comprehensive cost difference is less and less, which can determine the number of planning tower program. Then according to the selection of the program in the tower of the swing angle coefficient, horizontal pitch, vertical pitch, height difference coefficient, corner angle, etc. to determine the swing angle angle of the tower and its clearance. At the same time in the tower design and optimization process to implement the concept of whole life cycle management, comprehensive consideration of the design, processing, construction, operation, maintenance and other processes of program optimization.

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