The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 2025
Filed:
Feb. 14, 2023
Electric Power Research Institute of Yunnan Power Grid Co. , Ltd, Kunming, CN;
Abstract
The system and method for unbalanced current adjustment from capacity increase and phase-splitting output of distribution transformer according to embodiments of the present invention are provided, in which the system for unbalanced current adjustment from capacity increase and phase-splitting output of distribution transformer includes a single-phase transformer, a single-phase bridge rectifier, and a three-phase full-bridge inverter. The high-voltage side of the single-phase transformer is connected to the high-voltage side of the distribution transformer. The single-phase bridge rectifier connected to the low-voltage side of the single-phase transformer converts the AC power from the single-phase transformer into the DC power for the three-phase full-bridge inverter. The three-phase full-bridge inverter is connected to the three-phase lines through the three-phase reactors. It processes the three-phase load current through the sequence component decomposition to obtain the three-phase negative sequence current and the three-phase zero sequence current. This is then combined with the capacitor voltage control component to calculate and then obtain the three-phase reference current. Then, the three-phase reference current undergoes the hysteresis controlling, which allows the three-phase full-bridge inverter to output the corresponding three-phase compensation currents to the three-phase lines, achieving the three-phase current imbalance adjustment.