Method for identifying internal overvoltage of power distribution network based on atomic decomposition algorithm

• Main Authors: GAO WEI, HONG CUI, GUO MOUFA, CHEN SHIQUN, YANG GENGJIE
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; HANDLING RECORD CARRIERS; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS; TESTING

The invention relates to a method for identifying an internal overvoltage of a power distribution network based on an atomic decomposition algorithm. The method comprises the following steps of acquiring three-phase voltage waveforms of the first 0.5 to 8 cyclic waves after a fault at a power distribution network bus when an overvoltage accident occurs in a power distribution network system; dividing a three-phase voltage waveform into four time periods, namely T0, T1, T2 and T3; calculating a zero sequence voltage effective value of the T0 time period; and performing atomic decomposition on the three-phase voltage waveforms of the T1, T2 and T3 time periods to obtain an effective atomic parameter based on imperial colonial competition optimization, and based on the parameter, judging thevoltage type. According to the method provided by the invention, the internal overvoltage of the power distribution network is identified through the atomic decomposition algorithm, and different overvoltage types are disting