Patent ID: 10074982

Abstract:
The transformer-type voltage controller calculates a total reactive-power integration value, a total positive-maximum reactive-power integration value, and a total negative-maximum reactive-power integration value by using reactive power generation data that includes those integration values and received from a reactive-power-control-type voltage controller, calculates a positive reactive-power margin according to the total positive-maximum reactive-power integration value and the total reactive-power integration value, and calculates a negative reactive-power margin according to the negative-maximum reactive-power integration value total and the reactive-power integration value total, and changes a tap position of a transformer-type voltage control device such that if the positive reactive-power margin is smaller than a positive-side threshold, the positive reactive-power margin becomes larger than the positive-side threshold, and changes the tap position such that if the negative reactive-power margin is smaller than a negative-side threshold, the negative reactive-power margin becomes larger than the negative-side threshold.