Interval harmonic load flow calculation method adopting relative distance measurement

• Main Authors: FANG XIAOLING, LIN YAN, ZHANG ZHIGENG, WU DANYUE, LAN JINCHEN, XU SHUANGTING
• Format: Patent
• Language: Chinese; English
• Published: 13.01.2023
• 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 an interval harmonic power flow calculation method adopting relative distance measurement, which comprises the following steps of: firstly inputting parameters of a power grid and a network fluctuation quantity, constructing a fundamental wave and a node admittance matrix of the fundamental wave, setting an RDM initial value of node voltage, and carrying out fundamental wave power flow iterative calculation; and carrying out reactive power injection and voltage correction on the PV nodes, and outputting the fundamental voltage of the whole network and the RDM number of the injection current after a convergence condition is met. And then a simple solution method is adopted to further simplify the harmonic power flow iteration part in the decoupling method. Harmonic current is calculated at a harmonic source node in combination with a harmonic frequency spectrum, then a harmonic admittance matrix in an RDM form is established based on a harmonic model of each element of the whole network