Three-phase unbalanced current compensation device and method

• Main Authors: RUI GUOQIANG, ZHANG MING, QIU ZHILING, LIN ZHIYING, ZHANG YONG
• Format: Patent
• Language: Chinese; English
• Published: 04.12.2020
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses a three-phase unbalanced current compensation device and method, and the method comprises the steps of collecting and converting the three-phase current and voltage of a low-voltage side of a distribution transformer through a three-phase current and voltage collection and conversion circuit of a main control unit, and calculating the unbalance degree of the three-phase current at the low-voltage side of the distribution transformer according to preset time; comparing with a preset imbalance degree triggering condition; if the acquired current and voltage data information of a phase-change switch of each load under the distribution transformer is acquired, judging whether the communication of the phase-change switch at each load side is acquired or not; if the acquired data acquired by a three-phase switch connected with the load side is calculated and a commutation regulation strategy is formed, issuing a control command to the related commutation switch; and enabling the phase-change