Power distribution area energy conservation and loss reduction method based on load prediction and phase sequence optimization

Abstract

The invention discloses a power distribution area energy conservation and loss reduction method based on load prediction and phase sequence optimization. The method comprises the steps of collecting data of a power distribution area; filling the missing data value by using an EM algorithm; calculating line power flow by using real data of the day of the phase modulation day, using the three-phasecurrent at the outlet of the transformer area as a daily load curve of each phase and using a forward-backward sweep method to obtain theoretical line loss of the power distribution transformer area;based on historical data, predicting outlet three-phase current of a phase modulation day and daily electric quantity of each user in the power distribution area by utilizing an Elman neural network;establishing an optimal commutation mathematical model taking the minimum line loss of the power distribution area and the minimum commutation frequency in the commutation process as targets, and solving the optimal commutation mathematical model by using a genetic algorithm to obtain each user phase sequence after phase modulation; and comparing the line loss and the three-phase imbalance degreechange of the user before and after the phase sequence is adjusted. The method can effectively predict the operation data of the power distribution area, and is used for the phase sequence adjustmentof the power distribution area, thereby enabling the area to achieve the energy saving and loss reduction.

Description

technical field [0001] The invention relates to the technical field of power grid energy saving and loss reduction, in particular to a method for energy saving and loss reduction in distribution stations based on load prediction and phase sequence optimization. Background technique [0002] Energy saving and loss reduction are of far-reaching significance to the economic operation of the power system, but in the low-voltage distribution network of the three-phase four-wire system, most of the loads are connected by single-phase, and the difference in the running time of the loads connected by single-phase Sexuality and uneven distribution will lead to the appearance of unbalanced three-phase load, and then the neutral line current will cause problems such as line loss and distribution transformer power loss, which will cause high loss in the distribution network. The structure of my country's low-voltage distribution network is complex, and the nature of the load is becoming...

AI Technical Summary

Problems solved by technology

[0004] A method for energy saving and loss reduction in distribution stations based on load forecasting and phase sequence optimization proposed by the present invention can solve the technical problem that the manual phase modulation method based on historical data cannot effectively solve the unbalanced three-phase load to a certain extent

Images