Method for conducting line model selection and economic estimation of power distribution network through EXCEL

Abstract

The invention discloses a method for conducting line model selection and economic estimation of a power distribution network through the EXCEL. After a transmission medium, the transmission distance and a line load are determined according to a plan of the power distribution network, parameters and the investment costs of wires with different cross sections are found through the EXCEL, and economic loading areas of the wires are calculated; according to the load of the plan of the power distribution network,, the wires are selected in the economic loading areas, a plan scheme is determined, and finally economic estimation is carried out; a wire set with the lowest annual total cost in the using period is selected. According to the method, the other economic loading areas are considered in the wire selecting process, and the best economical efficiency is achieved; meanwhile, when the scheme is planned, the wires with the slightly-large cross sections are selected, the reliability and the safety of the system are improved, and the method is of great significance in improving the power grid service level and increasing power grid earnings. In addition, a line model selection database is built through the method, and data supports are provided for the economical efficiency for regularly checking lines and updating the lines in the future.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to a method for line type selection and economic estimation of a distribution network using EXCEL. Background technique [0002] As an important part of the power system, the quality of the distribution network will directly affect the safety, reliability, operation and investment economy of the power supply, the balance of power supply and demand, and the quality of power supply, which may lead to the continuous growth of users. Electricity demand cannot be met. Therefore, starting from the overall situation, it becomes one of the important purposes of distribution network planning to plan a power distribution system that has the optimal working mode and can meet the needs of users to the greatest extent. [0003] From the research literature on distribution network planning at home and abroad, the research on distribution network planning mainly focuses on load for...

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Problems solved by technology

[0003] From the research literature on distribution network planning at home and abroad, the research on distribution network planning mainly focuses on load forecasting, substation location and capacity determination, network connection mode analysis, distribution network optimization, distribution network reliability analysis, etc. In this regard, the research and analysis on the selection of distribution network conductors is not deep enough, and there is a lack of effective methods to guide the selection of conductor sets and conduct economic analysis.

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