An equivalent reference current based control strategy for low-voltage microgrid

被引：0

作者：

Liu, Jianhua ^{[1
]}

Yang, Honggeng ^{[1
]}

Zhang, Jie ^{[1
]}

Li, Tan ^{[1
]}

机构：

[1] School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, Sichuan Province

来源：

Dianwang Jishu/Power System Technology | 2014年 / 38卷 / 06期

关键词：

Distributed generation; Grid synchronization control; Grid-connected operating mode; Island operating mode; Low voltage microgrid;

D O I：

10.13335/j.1000-3673.pst.2014.06.017

中图分类号：

学科分类号：

摘要：

Based on PQ control and V/f droop control, an equivalent reference current based control strategy for low-voltage microgrid, which is suitable for both operating modes of microgrid, namely the grid-connected operating mode and island operating mode, is proposed. The deviations between the referential values of both amplitude and frequency of voltage and their actual values are led into the d-q axis components respectively, and the control of the led in deviations makes the distribution generations (DG) possessing corresponding operating characteristics under the two operating modes of microgrid. Using the proposed method, the switching between operating modes due to the change of operating mode can be avoided, thus the smooth transition between operating modes can be ensured; besides the dynamic adjustment effects of voltage and frequency can be effectively improved under the island operation of microgrid, thus the direct power control under grid-connected operating mode can be implemented. Meanwhile, a synchronization controller for grid-connection of microgrid is designed for the proposed control method, and the smooth gird-connection of microgrid can be achieved.

引用

页码：1529 / 1535

页数：6

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