Extended Power Control Strategy of Self-synchronized Virtual Synchronous Generator Under Unbalanced Power Grid

被引：0

作者：

Wang Y. ^{[1
]}

Sun D. ^{[1
]}

Nian H. ^{[1
]}

Wang X. ^{[2
]}

机构：

[1] College of Electrical Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang Province

[2] Key Laboratory of Far-shore Wind Power Technology of Zhejiang Province, Hangzhou, 311122, Zhejiang Province

来源：

Dianwang Jishu/Power System Technology | 2020年 / 44卷 / 09期

关键词：

Extended power theory; Self-synchronized strategy; Unbalanced power grid; Virtual synchronous generator;

D O I：

10.13335/j.1000-3673.pst.2020.0477

中图分类号：

学科分类号：

摘要：

Virtual synchronous generator (VSG) control strategy is widely used in the grid connection interface of new energy power generation system because of its inertial and frequency support characteristics for the power grid, but its operating capacity under unbalanced power grid is insufficient. In order to improve the self-synchronization capacity of the VSG and the quality of the output power under an unbalanced power grid, this paper proposes an extended power theory based self-synchronized VSG strategy. First, the relationship between the extended and the traditional powers are studied, and an extended power theory for VSG control is proposed. Then the feasibility of applying the extended power theory to the self-synchronized VSG strategy is analyzed, and an extend power resonance control method is studied for VSG to achieve precise control of both the extended and the traditional powers in the unbalanced power grid. Based on the analyses above, an extended power theory based self-synchronized VSG strategy is proposed, which can achieve precise self-synchronization and three different power-control modes by selecting different combinations of powers as the control variables. Experimental results verify the effectiveness of the proposed control strategy. © 2020, Power System Technology Press. All right reserved.

引用

页码：3368 / 3374

页数：6

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