Development of T-Type Three-Level Power Conversion System

With the ever-increasing proportion of new energy power generation, the energy storage system plays an increasingly significant role in regulating various links of power grid. As an important constituent part of energy storage system, the power conversion system (PCS) takes charge of energy exchange. The topology of the bipolar T-type three-level PCS and the control task allocation were described. Based on an analysis of the control strategies and logic switching under grid connection and off-grid conditions, the 20 kW T-type three-level PCS device was developed by conforming to the industrial design requirements, the related tests were carried out in accordance with GBT 34120 and GBT 34133, and the test results show that the developed device satisfies the national standard requirements. *CRITICAL: Do Not Use Symbols, Special Characters, Footnotes, or Math in Paper Title or Abstract.