Closed-Form Solutions for Grid-Forming Converters: A Design-Oriented Study

被引：3

作者：

Zhao, Fangzhou ^{[1
]}

Zhu, Tianhua ^{[1
]}

Harnefors, Lennart ^{[2
]}

Fan, Bo ^{[3
]}

Wu, Heng

Zhou, Zichao ^{[3
]}

Sun, Yin ^{[4
]}

Wang, Xiongfei ^{[3
]}

机构：

[1] Aalborg Univ, AAU Energy, DK-9220 Aalborg, Denmark

[2] ABB Corp Res, Vasteras SE-72226, Sweden

[3] KTH Royal Inst Technol, Elect Engn, Stockholm 11428, Sweden

[4] Shell Global Solut Int BV, Renewable Generat Technol, NL-2596 The Hague, Netherlands

来源：

IEEE OPEN JOURNAL OF POWER ELECTRONICS | 2024年 / 5卷

关键词：

Grid-connected converter; grid-forming control; stability; sub-synchronous resonance; synchronous resonance; RESONANCE; INVERTERS;

D O I：

10.1109/OJPEL.2024.3357128

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper derives closed-form solutions for grid-forming converters with power synchronization control (PSC) by subtly simplifying and factorizing the complex closed-loop models. The solutions can offer clear analytical insights into control-loop interactions, enabling guidelines for robust controller design. It is proved that 1) the proportional gains of PSC and alternating voltage control (AVC) can introduce negative resistance, which aggravates synchronous resonance (SR) of power control, 2) the integral gain of AVC is the cause of sub-synchronous resonance (SSR) in stiff-grid interconnections, albeit the proportional gain of AVC can help dampen the SSR, and 3) surprisingly, the current controller that dampens SR actually exacerbates SSR. Controller design guidelines are given based on analytical insights. The findings are verified by simulations and experimental results.

引用

页码：186 / 200

页数：15

共 29 条

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