Harmonic power flow calculation method containing VSC

• Main Authors: CHEN XIAOWEN, ZHANG YE, JIAO ZAIBIN, YUAN HAO, LI JIANHUA, ZHAO YONG, TU LIANG, HONG CHAO
• Format: Patent
• Language: Chinese; English
• Published: 16.08.2019
• 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 harmonic power flow calculation method containing a VSC (Voltage Source Converter). Firstly, the fundamental wave power flow is calculated to obtain the fundamental wave voltage of each node, and the modulation ratio of the VSC is obtained; secondly, three pieces of input data, namely, the DC voltage, the modulation ratio and the carrier frequency are substituted into theharmonic model formula of the VSC to obtain the content of each harmonic in the AC side voltage of the VSC, and the VSC is regarded as a harmonic voltage source approximately; and thirdly, in order to realize an interface between a VSC harmonic voltage source model and the harmonic power flow, the VSC and the AC side transformer thereof are equivalent to a harmonic current source with internal impedance based on the Norton's equivalence theorem to form a harmonic admittance matrix, and the harmonic power flow is calculated by harmonic current injection. 本发明公开了一种包含VSC的谐波潮流计算方法，首先作基波潮流计算，得到各节点基波电压，求得VSC的调制比；接下来，该发明方法将直