Optimization strategy for ice melting of transmission lines supported by comprehensive energy under the dynamic constraints of stability risk
Aiming at the problem that the decision-making process in the existing power grid transmission line ice melting scheme arrangement takes a long time,and there is a risk of operation stability,which leads to the insufficient decision-making ability of the power grid to deal with severe ice disasters,a comprehensive energy-supported transmission line ice melting optimization strategy under the dynamic constraints of stability risk is proposed.Firstly,an icing growth model is established based on meteorological data,the corresponding relationship between transmission line icing growth and line faults is analyzed,a line outage probability model is established,and the loss degree of line outage is quantified.Secondly,the mechanism of changing the line flow based on integrated energy to slow down the growth of line icing is analyzed,and the ice-melting risk constraints of distribution lines based on integrated energy are considered to establish a line ice-melting model based on integrated energy.On this basis,an ice-melting optimization method for transmission lines with integrated energy support under the dynamic constraints of stability risk is proposed,which is iteratively solved based on the Lagrangian relaxation method.IEEE RTS-79 is used to simulate the ice melting example.The results show that the method based on this paper can improve the efficiency of the transmission line ice melting scheme arrangement and ensure the safe and stable operation of the power grid.
stability risktransmission linesice melting optimizationintegrated energy
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