Novel grid-connected and off-grid test system of energy storage converter

• Main Authors: CHEN GUANG, QI LIANG, WANG XU, CHUNG HUA, PAN JIAKE, YU TAO, CHEN JIANGHONG, XIAO ZHIMING, LIAO XIAOHUI, CHEN SHANGWEN
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2022
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING

The utility model relates to the technical field of power electronics, in particular to a novel grid-connected and off-grid test system of an energy storage converter, which comprises a step-down transformer, a primary side of the step-down transformer is connected with a power grid voltage; the power grid simulation uninterruptible power supply is connected between the secondary side of the step-down transformer and a reference node; the primary side of the first isolation transformer is connected with the reference node; the alternating current end of the first energy storage converter is connected with the secondary side of the first isolation transformer; the alternating current end of the second energy storage converter is connected with the secondary side of the first isolation transformer, and the direct current end of the second energy storage converter is connected with the direct current end of the first energy storage converter; the primary side of the second isolation transformer is connected with