Automatic Adjustment Method for Three-Phase Load Imbalance in Distribution Area
The existing adjustment methods have been adjusted many times,with a monthly line loss rate of 9.96%.Therefore,an automatic adjustment method for three-phase load imbalance in the distribution station area is studied.By establishing a mathematical model of the switch,optimizing the model and finding the optimal switch action strategy.Calculate the sum of all phase sequence currents in the distribution area based on the phase sequence status information of different switches,and determine whether the distribution area has reached the ideal equilibrium state.Calculate the imbalance degree of three-phase load and determine the severity of three-phase load imbalance.Use the SSA search algorithm to calculate the fitness value of each switch during operation and update its position until the optimal value is found before stopping.By introducing seasonal change testing methods,the algorithm is prevented from falling into local optima and completing commutation.Calculate the imbalance value of the zero line to determine the level of load imbalance.Set the adjustment boundary and connect the automatic commutation switch to achieve load adjustment,reduce three-phase imbalance,and ensure the minimum number of actions of the commutation switch.The results indicate that three adjustments were made during the phase adjustment process,achieving the principle of minimizing the number of adjustments.According to the calculation of imbalance,the actual cumulative value of line loss at every moment is 2 104.9 kWh,with a monthly line loss rate of 6.54%,which significantly reduces line loss and achieves good rectification effect in the distribution area.
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