Impedance coordination remodeling control strategy for flexible direct current interconnection device in alternating current and direct current hybrid distribution network

• Main Authors: WANG KUN, TIAN YANJUN
• Format: Patent
• Language: Chinese; English
• Published: 27.09.2022
• 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 impedance coordination remodeling control strategy for a flexible direct current interconnection device in an alternating current and direct current hybrid distribution network. Aiming at the problem of negative impedance existing in the alternating current side and the direct current side of the converter under power two-way transmission, according to impedance coordination remodeling control, an optimized impedance model is reestablished, and when power is transmitted in the forward direction, direct current side impedance remodeling control is started and is responsible for remodeling the negative impedance of the direct current side of the voltage source converter VSC-B into positive impedance when the power is transmitted in the forward direction; and when the power is reversely transmitted, AC side impedance remodeling control is started and is responsible for reversely transmitting the power, and the AC side negative impedance of the voltage source converter VSC-B is remodele