Power line loss calculation method considering temperature

Abstract

The invention discloses a power line loss calculation method considering temperature. The power line loss calculation method comprises the following steps of: (1) acquiring power network parameter information containing temperatures of power lines in all branches in a power network; (2) calculating a correction equation of an active power, a reactive power and the temperature of the power network to obtain an unbalanced amount among the active power, the reactive power and the temperature; (3) judging whether the unbalanced amount among the active power, the reactive power and the temperature reaches a preset convergence criteria, if the unbalanced amount reaches the preset convergence criteria, entering step (4); if the unbalanced amount does not reach the preset convergence criteria, correcting voltages, phase angles and temperatures of all nodes in the power network, correcting resistance values of all branches in the power network, and returning to the step (1); and (4) calculating sum of rear parts of complex powers of each branch on the power line according to the obtained power network parameter information to obtain power loss of each branch on the power line.

Description

technical field The invention belongs to the field of power steady-state calculation, in particular to a power line loss calculation method considering temperature. Background technique Line loss is the line loss, which is the active power consumed by conductance and resistance, that is, the energy loss dissipated in the form of heat energy. Through theoretical calculation, we can find the distribution law of electric energy loss in the power grid, which can expose management and technical problems, provide theoretical and technical basis for loss reduction work, improve the benefits of energy saving and loss reduction, and make line loss management more scientific. Theoretical line loss is the power loss obtained from theoretical calculations. The calculation is mainly based on the load conditions of the power grid, power flow distribution, operation mode and parameters of power supply equipment. The temperature change caused by electric heating will affect the line loss ...

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Problems solved by technology

The temperature change caused by electric heating will affect the line loss of the power system, but in the conventional theoretical line loss calculation, although the resistance value of the branch circuit is very sensitive to temperature, the resistance value has always been treated as a constant value, but in the conventional loss In the calculation, the resistance on the transmission line is always treated as a constant value

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