Portable automatic reactive compensation apparatus with multi-level-adaptive and voltage-regulating functions

Abstract

The invention discloses a portable automatic reactive compensation apparatus with multi-level-adaptive and voltage-regulating functions. The automatic reactive compensation apparatus comprises a current transformer, a residual current action protector, an automatic reactive compensation controller and two groups of intelligent capacitors, wherein the automatic reactive compensation controller is provided with a voltage sampling circuit, a current sampling circuit and a DSP processor; the first path lead at the upper end of the residual current action protector is connected with the voltage sampling circuit; the secondary line of the current transformer is connected with the current sampling circuit; a voltage switching threshold value and a time-delay threshold value are preset in the DSP processor; the voltage sampling circuit carries out voltage data acquisition according to the preset time delay threshold value; and the DSP processor compares the collected voltage data with the preset voltage switching threshold value. According to the automatic reactive compensation apparatus, through five times of cycle criterions, more accurate switching instruction data and more correct switching action can be realized.

Description

technical field [0001] The invention relates to reactive power compensation technology. Background technique [0002] At present, the automatic reactive power compensation controllers on the market use the voltage threshold to control reactive power switching using the delay method. However, in rural areas, due to the uneven load distribution and large seasonal load changes, they are installed on the line side as line segment compensation. The reactive power compensation device often encounters that the delay time is set short, and the reactive power switching is frequent. If the delay time is set too long, the voltage quality of the line side cannot be improved in time when there is a short "low voltage" on the rural line side. . [0003] Therefore, how to use an effective judgment method to make the automatic reactive power compensation controller send timely instructions and at the same time avoid frequent switching actions of smart capacitors is an urgent problem to be ...

AI Technical Summary

Problems solved by technology

[0002] At present, the automatic reactive power compensation controllers on the market use the voltage threshold to control reactive power switching using the delay method. However, in rural areas, due to the uneven load distribution and large seasonal load changes, they are installed on the line side as line segment compensation. The reactive power compensation device often encounters that the delay time is set short, and the reactive power switching is frequent. If the delay time is set too long, the voltage quality of the line side cannot be improved in time when there is a short "low voltage" on the rural line side.

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