Method, device and system for dynamically fixing volume of line in real-time electricity market

Abstract

The invention discloses a method, device and system for dynamically fixing the volume of a line in a real-time electricity market, and belongs to the field of electrical engineering, and the method comprises the steps: S1, obtaining the initial moment temperature of each lead and the tangent of a corresponding initial moment temperature curve in a real-time market scheduling period; s2, using the initial moment temperature corresponding to each lead and the tangent of the initial moment temperature curve to calculate the predicted temperature of the corresponding lead at each moment in the real-time market scheduling period; and S3, taking the condition that the predicted temperature corresponding to each time of each conductor in a real-time market scheduling period is lower than the preset maximum bearing temperature of the corresponding conductor as a temperature constraint, and integrating the temperature constraint into a real-time SCED model to dynamically determine the maximum line transmission capacity corresponding to each wire. Compared with a traditional static line capacity constraint method, the method can effectively adapt to environment temperature and weather changes, and the thermal stability and safety of power grid operation are guaranteed.

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 balancing electricity and electricity in a timely manner, 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 lot of research has been done to calculate the temperature of the wire, none of the solutions have been applied to real-tim...

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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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