The embodiments of the present invention disclose a control system, control method, control device and sub-module of a modular multilevel converter (MMC). The MMC comprises N sub-modules, and the control system comprises a control module,which is used to send a control instruction, and a concentrator, which is connected to N sub-modules respectively to receive said control instruction and send said control instruction to said N sub-modules, wherein each sub-module of N sub-modules is used to determine the sub-module set adapting to execute said control instruction and execute said control instruction when the sub-module set it belongs to is determined, wherein N is a positive integer greater than or equal to 2. The embodiments of the present invention realize a technical solution for controlling an MMC in a distributed way and the technical solution can overcome the security problem of centralized control.
展开▼
