Wide-area optimization method for three-phase load imbalance of low-voltage power distribution network

• Main Authors: PANG SIYUAN, JIANG TAORAN, YANG JINGTAO, PAN XIAYUAN, LIU XIZHE
• Format: Patent
• Language: Chinese; English
• Published: 28.08.2018
• 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 wide-area optimization method for three-phase load imbalance of a low-voltage power distribution network. The wide-area optimization method comprises the following steps: S1,obtaining the active power distribution condition of a low-voltage power distribution network station area through load flow calculation; S2, simplifying the station area network structure, and finding out hub nodes in the station area; S3, sorting the hub nodes from large to small according to the power supply radius of a distance station area transformer; S4, carrying out phase modulation optimization on the hub node with the largest power supply radius of the distance station area transformer; S5, classifying the hub node with phase modulation optimization finished and an affiliated user into a balanced or imbalanced three-phase user, returning to the step S4, and gradually shrinking the station area network; S6, finally obtaining the overall optimization scheme of the station area, performing phase regulation