Control method for adjusting reactive voltage of power distribution network to ensure electric energy quality of low-voltage region

Abstract

The invention relates to a control method for adjusting the reactive voltage of a power distribution network to ensure the electric energy quality of a low-voltage region. The method comprises the steps of 1) applying the load prediction, analyzing a next-day load demand parameter, analyzing and determining the type of each load, and establishing a load model; 2) applying the load prediction, analyzing the next-day terminal voltage information of a feeder line of a power distribution network, determining a voltage drop limit value and a voltage expected value, and determining the tapping pointof a grading voltage regulator and a to-be-switched capacitance value; 3) based on the capacitance value obtained through prediction, preparing a capacitor in advance; 4) when an intraday load is increased, adjusting the tapping point of the voltage regulator is real time or a switched capacitor to compensate the reactive power shortage. According to the invention, the next-day load prediction data is adopted as a basis, and the required value of the capacitor is prepared in advance. When the intraday load is increased, the well prepared capacitor is put into use. Therefore, on the premise that the voltage drop is ensured to be within an expected range, the power supply quality is guaranteed.

Description

technical field [0001] The invention belongs to the field of voltage and reactive power control of a distribution network, and relates to a control method for adjusting the reactive voltage of a distribution network and ensuring the quality of electric energy in a low-voltage area. Background technique [0002] In recent years, with the rapid growth of seasonal tourism in rural areas, the capacity of distribution transformers planned and constructed according to the traditional conventional load forecasting method can guarantee the load demand of the power supply area in winter, but in the tourist season between May and October , it is difficult to guarantee the power load demand. Especially on weekends, with the sudden increase in the number of people in tourist areas such as farmhouses, some users even need to equip their own fuel generators to meet the load demand. This method not only limits the economic improvement and development capabilities of rural areas, but also c...

AI Technical Summary

Problems solved by technology

However, there is no mature voltage and reactive power control algorithm for distribution network voltage and reactive power control after considering load participation in demand side response.

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