Abstract
Cyber-physical system is becoming a new feature and hot topic in the development of smart grid and DC power distribution system. Based on the standardized cyber-physical modeling and communication system — IEC 61850, this paper establishes the operation control architecture of the low-voltage multi-terminal DC (LV-MTDC) system. The coordinated operation control strategies including power electronic transformer (PET), voltage source converter (VSC) is proposed. Then a cyber-physical model of the system based on IEC 61850 is built, according to the application requirements of operation control in the LV-MTDC system. On this basis, the implementation method of system operation control based on IEC 61850 is proposed, including the software/hardware design of intelligent electronic device (IED), dispatching operation and uninterrupted power supply. The simulation environment is further built to verify the system operation control technology, and the test platform is used to carry out the actual tests. The research results show that the operation control technology for the LV-MTDC system proposed in this paper is feasible, which can guarantee the rapid and accurate information exchange of control commands and settings, and thus effectively realize the operation control of the LV-MTDC system under complex conditions.
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