A Calculation Method for the Ampacity of Overhead Transmission Lines Based on Typical Meteorological Years
An overhead transmission line and typical meteorological technology, which is applied in the field of overhead transmission line ampacity calculation based on typical meteorological years, can solve the problems of unreasonable ampacity and lack of transmission line risk quantification calculation methods.
Active Publication Date: 2020-07-17
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1
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Problems solved by technology
However, at present, the transmission line operation department mainly relies on operating experience when determining the environmental boundary conditions, and lacks a quantitative calculation method for transmission line risks under different environmental boundary conditions, so the final calculated ampacity is not reasonable.
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[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0029] For the calculation of the ampacity of line A, the process is as follows figure 1 shown. First, collect observation data of weather stations in the area where line A is located. Including nearly 30 years of weather station daily weather observation data. Specifically, it includes precipitation, temperature at 2m altitude, wind speed and direction at 10m altitude, and sunshine hours. Calculate the long-term cumulative probability density distribution ...
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The invention discloses an overhead transmission line current-carrying capacity calculation method based on a typical meteorological year. In an existing overhead transmission line current-carrying capacity calculation method, environmental boundary conditions are usually determined through operating experience so that the risk level of overhead transmission line operation cannot be determined. According to the technical scheme, the method comprises the steps that based on meteorological observation data, the typical meteorological year is obtained by using a Finkelstein-schafer statistic method; meteorological factors of the typical meteorological year are reanalyzed in a meso-scale meteorological forecast mode, and meteorological factor data of the position, where the transmission line is located, in the typical meteorological year is obtained; based on the meteorological factor data, the hourly change conditions of the current-carrying capacity along the transmission line are obtained through calculation by using a heat balance model, and the annual current-carrying capacity probability density distribution is obtained; according to the acceptable risk level of a transmission line operation department, the value of the current-carrying capacity of the transmission line is determined.
Description
technical field [0001] The invention relates to the technical field of overhead transmission line operation, in particular to a method for calculating the ampacity of an overhead transmission line based on a typical weather year. Background technique [0002] The ampacity of overhead transmission lines refers to the maximum flow capacity that overhead transmission lines can withstand, which is mainly determined by the thermal characteristics of the conductors and the meteorological environment in which the transmission lines are located. The ampacity directly determines the power transmission capacity of the overhead transmission line, which is of great significance to the economics of the construction and operation of the overhead transmission line. [0003] The current carrying capacity of overhead transmission lines is usually calculated by the transmission line operation management department. The transmission line operation management department will determine the envi...
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IPC IPC(8): G06F17/10
CPCG16Z99/00
Inventor 周象贤王少华刘浩军李特曹俊平蒋愉宽于淼
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY