Method for treating three-phase load imbalance of low-voltage distribution network

• Main Authors: Sun Qichao, Xu Xuejun, Xu Yanjun, Zhang Hongxing, Liu Kai
• Format: Patent
• Language: Chinese; English
• Published: 10.08.2016
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention discloses a method for treating a three-phase load imbalance of a low-voltage distribution network. According to the method, three-phase current data at a low-voltage side of a distribution transformer, outlet wire electric leakage protection switch load data, user electricity consumption load data and current and phase data of commutation switches are collected by use of a transformation zone controller, through analysis calculation, an imbalance degree value of each outlet wire is obtained, when an imbalance degree is greater than a set threshold and the imbalance degree is maintained beyond a set adjustment time period, an optimal "imbalance adjustment method" is given, the commutation switches are automatically remotely controlled for load adjustment, redistribution of the three-phase load of each outlet wire is completed, the three-phase load of each outlet wire is enabled to be at a basically balanced state, and thus a three-phase load balance state of a low-voltage line is realized. Accor