A method, device and system for dynamic line capacity determination under real-time power market

Abstract

The invention discloses a method, device and system for dynamic line capacity determination under real-time power market, belonging to the field of electrical engineering. The method includes: S1: in a real-time market scheduling period, acquiring the initial moment temperature of each wire; The tangent of the corresponding initial time temperature curve; S2: Calculate the predicted temperature of the corresponding wire at each time in the real-time market scheduling cycle by using the initial time temperature corresponding to each wire and the tangent of the initial time temperature curve; S3: Put each conductor in a In the real-time market scheduling cycle, the corresponding predicted temperature at each moment is lower than the preset maximum withstand temperature of the corresponding conductor as a temperature constraint, which is integrated into the real-time SCED model to dynamically determine the maximum transmission capacity of each line corresponding to each wire. Compared with the traditional static line capacity constraint method, this method can effectively adapt to changes in ambient temperature and weather, and ensure the thermal stability and safety of power grid operation.

Description

technical field [0001] The invention belongs to the field of electrical engineering, and more particularly, relates to a method, device and system for dynamic line capacity determination under real-time power market. Background technique [0002] Since the reform of the electricity market, my country has gradually implemented the reform of the spot market, in which the real-time market undertakes the task of timely power and electricity balance, with the shortest dispatch period and the highest accuracy requirements. However, due to the difference in ambient temperature and weather conditions, the real-time temperature of the wire often fluctuates. Even if the traditional static capacity constraints are met, the wire may be overheated in extremely hot weather and cause burns, resulting in serious safety accidents. [0003] Although a large number of studies have been carried out to calculate the temperature of conductors, none of the schemes have been applied to real-time sc...

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method, device and system for dynamic capacity determination of lines in the real-time power market. It constrains the maximum power flow capacity of the wires and ensures the safe operation of the power grid, thereby solving the technical problem that the temperature of the wires cannot be restrained by fixing a single static capacity limit in the current real-time power market, which may cause potential thermal overload

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