Abstract：Traditional photovoltaic AC power generation systems face a series of significant challenges, such as power angle stability and wide-frequency oscillation. Medium-voltage DC power generation technology has gradually become another alternative technical solution. This article conducts research based on the Huadian Xinjiang ±50 kV/200 MW medium-voltage DC demonstration project. Firstly, it introduces the system topology and operation mode based on high-magnification modular commutated converter (MCC) valves, and designs a hierarchical coordinated control system architecture and collaborative control protection strategy. Then, a full-chain hardware-in-the-loop simulation test platform for the DC control and protection system is established, and a simulation test verification scheme for control and protection strategies is designed. Finally, hard-ware-in-the-loop simulation tests are conducted for the transient and steady-state conditions of the me-dium-voltage DC power generation system. The test waveforms confirm the reliability and accuracy of the proposed control and protection system architecture, control and protection strategies, and the built simulation test platform, providing technical support for the in-plant joint debugging tests and on-site commissioning of the demonstration project.
杨伟涛, 刘颖, 张尧, 郭晓. 大型光伏直流发电控制保护技术及仿真试验研究[J]. 电气技术, 2026, 27(7): 54-61.
YANG Weitao, LIU Ying, ZHANG Yao, GUO Xiao. Research on control and protection technology and simulation testing for large-scale photovoltaic DC power generation. Electrical Engineering, 2026, 27(7): 54-61.
2026, Vol. 27 
