Tie-line power control strategy for a microgrid with multi-parallel connected inverters

被引：0
|
作者：
Xu P. [1 ]
Huang X. [2 ]
Wang K. [1 ]
Xu J. [1 ]
Li G. [1 ]
机构：
[1] Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education (Shanghai Jiao Tong University), Shanghai
[2] State Grid Shanghai Pudong Power Supply Company, Shanghai
来源：
| 1600年 / Power System Protection and Control Press卷 / 49期
基金：
中国国家自然科学基金;
关键词：
Hierarchical control; Microgrid; Parallel inverter; Tie-line power control;
D O I：
10.19783/j.cnki.pspc.201398
中图分类号：
学科分类号：
摘要：
The droop mechanism based tie-line power control strategy for a microgrid with multi-parallel connected inverters has many control levels and the time scales between the levels are quite different. This leads to poor transient response and weak ability to deal with disturbance such as local load fluctuation or droop coefficient adjustment. To solve these problems, a new type of hierarchical control strategy for the tie-line power of microgrid with multi-parallel connected inverters is proposed. The decentralized control of the first level adopts the method of voltage filtering tracking error to control the voltage at the Point of Common Connection (PCC) of the system rapidly and accurately. The centralized control of the second level realizes specific power exchange between the microgrid and the main grid or between interconnected microgrids by directly adjusting the voltage amplitude and phase at the PCC. The internal inverters accurately distribute the active and reactive power according to the power distribution coefficient. The effectiveness and superiority of the proposed control strategy are verified by offline simulation and real-time hardware-in-loop experiments. © 2021 Power System Protection and Control Press.
引用
收藏
页码：50 / 59
页数：9
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