Research on the Link for Fault Current Limiting and Voltage Compensation between Hybrid Micro-Grid and Distribution Network

Jinhao Wang, Shengwen Li, Shifeng Zhang, Ming Huang, Xiao Chang, Ming Wei, Runquan Meng, Lei Wang, Han Gao, Qi Wang, L. Koh, Jianfang Xiao, Peng Wang
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Abstract

Aiming at the faults pass-through between the distribution network and the AC-DC hybrid micro-grid (HMG), this paper proposes a concept of the series compensation link (SCL) which has been inserted between a distribution network and a AC-DC HMG to compensate HMG voltage and limit excessive fault current as well. The basic structure and operation modes of the SCL are introduced firstly. Then, based on deriving the mathematical models of the SCL in abc-three-phase coordinate frame and in dq synchronous rotation coordinate frame, a compound compensation and current limiting strategy is designed. A series compensation transformer (SCT) is designed. Finally, the effectiveness of the SCL and its control strategy have been verified by simulations.
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混合微电网与配电网故障限流电压补偿链路的研究
针对配电网与交直流混合微电网之间的故障传递问题,提出了在配电网与交直流混合微电网之间插入串联补偿链路(SCL)的概念,以补偿交直流混合微电网的电压并限制故障电流过大。首先介绍了SCL的基本结构和工作方式。然后,在推导了abc-三相坐标系和dq同步旋转坐标系下SCL的数学模型的基础上,设计了一种复合补偿限流策略。设计了串联补偿变压器(SCT)。最后,通过仿真验证了SCL及其控制策略的有效性。
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