In order to overcome the monopoly of high-performance petroleum-specific inverters by foreign technology and prevent the impact of international trade shows on the AC electric control system of drilling rigs; Hande and the team of President Xu Dianguo of Harbin Institute of Technology jointly developed high-voltage and high-power special inverters for offshore drilling platforms. The algorithm core of this inverter is the integration and localization of Siemens' vector control algorithm and ABB's DTC control algorithm-"speed adaptive full-order observer control algorithm", which breaks the foreign monopoly of the two major companies on inverter control and realizes Independent research and development of domestic inverter control.