Cause Analysis of Distance on Rural Power Network Voltage Based on Power Flow Model

In order to analyze the influence of long-distance power transmission on the terminal voltage of agricultural network, this paper establishes the low voltage model of agricultural network based on the basic power flow model, and obtains the semi-quantitative relationship between the terminal voltage deviation and various factors by formula derivation. By introducing reference data for calculation, the influence of distance factor on the voltage reduction of the rural power grid is obtained. Under the same active and reactive power transmission conditions, the farm network voltage gradually decreases with the increase of the length of the agricultural network feeder. On the other hand, for the same feeder length, as the active power increases, the farm network voltage gradually decreases. As the reactive power increases, the voltage of the rural network gradually decreases. The trend of the rural power grid voltage with the reduction of the active power is greater than the reactive power, that is, the same percentage of the active power and the reactive power change. The active power has a more significant effect on the voltage reduction of the rural power grid. Therefore, the active, reactive and feeder lengths will have an impact on the terminal voltage of the rural network. By reducing the radiation range of the feeder, the terminal voltage of the rural network can be effectively improved.