An MMC based HVDC system with optimized AC fault ride-through capability and enhanced circulating current suppression control

被引:0
|
作者
Badar, Jahangeer [1 ]
Akhtar, Faheem [1 ]
Kumar, Dileep [1 ]
Munir, Hafiz Mudassir [1 ]
Ali, Khawaja Haider [1 ]
Alsaif, Faisal [2 ]
Alsulamy, Sager [3 ]
机构
[1] Sukkur IBA Univ, Dept Elect Engn, Sukkur, Sindh, Pakistan
[2] King Saud Univ, Coll Engn, Dept Elect Engn, Riyadh, Saudi Arabia
[3] Univ Southampton, Fac Engn & Phys Sci, Energy & Climate Change Div, Sustainable Energy Res Grp, Southampton, England
关键词
HVDC; fault ride-through (FRT); modular multilevel converter (MMC); circulating current control circuit; stability; MODULAR MULTILEVEL CONVERTERS; CONTROL STRATEGY; WIND TURBINES; SIDE;
D O I
10.3389/fenrg.2023.1190975
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Modular multilevel converter (MMC) is a proven technology for HVDC applications due to its salient features such as modularity and excellent power quality. To ensure best possible grid support, recent grid codes require incorporating fault ride-through (FRT) strategies so that HVDC converter stations remain connected and maintain reliable operation under various symmetrical and asymmetrical AC faults. In this paper, a communication-free enhanced fault ride-through technique without the need of DC chopper has been proposed. The proposed FRT strategy ensures quick post fault recovery operation and can effectively manage DC link and capacitor voltages within safe limits. Along with proposed FRT strategy, in order to avoid high circulating current (CC) inside an MMC, this paper has proposed an optimal circulating current control approach based on proportional resonant and PI controllers in an abc reference frame. The suggested technique lowers the ripple in capacitor voltages while reducing the magnitude of the CC. Under both balanced and unbalanced ac grid conditions, the ripple in the dc link voltage is also reduced without the use of dual synchronous reference frame or any additional controllers. Simulation results confirm the effectiveness of the proposed FRT and CC suppression techniques for a 580-kV, 850-MW MMC-based HVDC system.
引用
收藏
页数:15
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