Temperature influence-considering optimal power flow algorithm of power system

Abstract

The invention discloses a temperature influence-considering optimal power flow algorithm of a power system. As the traditional optimal power flow is processed by taking power system network parameters as constants and the influence of the electric heating coupling relation of the actual power grid line is neglected, the calculation result of the traditional optimal power flow has great deviation to the scheduling operation result of the actual power grid. On the basis, the temperature influence-considering optimal power flow algorithm of the power system is characterized in that a temperature influence-considering optimal power flow model of the power system is established according to the electric heating coupling relation between line temperatures and line resistance. Besides, the problem of the temperature influence-considering optimal power flow algorithm of the power system is solved by use of a simplifying primal-dual interior point method, and generalized inequality constraints containing only upper limit constraints are formed by simplifying the inequality constraints in the optimization model, and the writing of a program can be greatly simplified. Finally, the simulation and analysis results of a plurality of examples indicate that the model and the algorithm are higher than the traditional optimal power flow in calculation accuracy and calculation efficiency and have significance to the scheduling operation of the power system.

Description

technical field [0001] The invention relates to an optimal power flow algorithm, in particular to a power system optimal power flow algorithm considering temperature influence. Background technique [0002] The optimal power flow (OPF) of the power system refers to the stable operation state of the system that achieves the optimal target by adjusting the available control means in the system under the specific power grid operation and security constraints. , operation and control are of great significance. The traditional OPF regards the actual grid parameters as constant, but in the actual operation process, the grid parameters are affected by many aspects such as environment and operation, especially the line resistance value in the grid is closely related to the line temperature; on the other hand, due to the greenhouse effect Due to the frequent occurrence of extreme weather in various places, especially the high temperature weather in summer, under the influence of...

AI Technical Summary

Problems solved by technology

The traditional OPF regards the actual grid parameters as constant, but in the actual operation process, the grid parameters are affected by many aspects such as environment and operation, especially the line resistance value in the grid is closely related to the line temperature; on the other hand, due to the greenhouse effect The impact of extreme weather frequently occurs in various places, especially in summer high temperature weather. Under the influence of extreme weather and the high load brought by it, the parameters of the power grid will also be greatly affected

Therefore, in the traditional OPF calculation, due to ignoring the change of grid parameters, there is a large deviation between the calculation results and the actual operation of the grid

Images