Large-Disturbance Stability Analysis of Hybrid AC/DC Microgrid with Constant Power Loads

被引：0
作者：
Liu X. [1 ]
Sun X. [1 ]
Song X. [1 ]
机构：
[1] School of Electrical and Control Engineering, North China University of Technology, Beijing
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2021年 / 36卷
关键词：
Constant power loads (CPLs); Hybrid AC/DC microgrid; Large signal stability analysis; Mixed potential theory;
D O I：
10.19595/j.cnki.1000-6753.tces.L90154
中图分类号：
学科分类号：
摘要：
In hybrid AC/DC Microgrid, the tightly regulated loads could be regarded as constant power loads (CPLs), usually inducing negative impedance instability problems. This paper investigates large signal stability of hybrid AC/DC microgrid in grid-connected mode based on mixed potential theory, and the characteristics of CPLs are considered in the storage system charging and discharging mode. Firstly, the entire system is converted from abc frame to dq rotating frame. Then the mixed potential models are built, and large signal stability criteria are derived. The obtained criteria interpret relationships among the maximum power of the CPLs, the capacitance, the inductance, the control parameter kip of the current inner loop and the control parameter kvp of the voltage outer loop. When the storage system changes from charging to discharging mode, the maximum power of the CPLs that the system can support would increase significantly. Finally, simulation results are used to verify the validity of the obtained criteria. © 2021, Electrical Technology Press Co. Ltd. All right reserved.
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页码：115 / 125
页数：10
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