面向串联补偿三相并网逆变器的模拟阻抗控制策略

doi:10.3969/j.issn.1008- 0198.2023.05.005

湖南电力 ›› 2023, Vol. 43 ›› Issue (5): 31-37.doi: 10.3969/j.issn.1008- 0198.2023.05.005

• “电力电子化新型电力系统主动支撑控制与优化运行关键技术”专栏 • 上一篇下一篇

面向串联补偿三相并网逆变器的模拟阻抗控制策略

邓紫妮, 粟梅, 孙尧, 林建亨

中南大学自动化学院,湖南长沙 410083

收稿日期:2023-09-19 出版日期:2023-10-25 发布日期:2023-11-03
通信作者: 林建亨(1994),男,福建三明人,博士,通信作者,主要从事电力电子系统建模与控制专业方向的研究。
作者简介:邓紫妮(1998),女,硕士研究生在读,主要从事新能源并网的控制与稳定性研究。
基金资助:
国家自然科学基金-杰出青年基金项目(62125308)

Impedance-Emulating Control Strategy for Series-Compensated Three-Phase Grid-Connected Inverters

DENG Zini, SU Mei,SUN Yao, LIN Jianheng

School of Automation, Central South University,Changsha 410083,China

Received:2023-09-19 Online:2023-10-25 Published:2023-11-03

摘要/Abstract

摘要： 串联补偿是一种提高可再生能源发电站长距离输电能力的常见方案,然而并网逆变器和串联补偿电力线之间的相互作用会带来振荡问题,威胁电力系统的安全运行。为此提出一种无锁相环的扩展模拟阻抗控制策略,在弱电网和高串补度电网中稳定系统。此外,还通过稳定性分析验证该方法的有效性;进行特征值分析,以指导参数设计。最后,通过模拟和实验结果验证了理论分析和所提控制策略的有效性。

关键词: 串补电网, 三相并网逆变器, 次同步振荡, 模拟阻抗控制

Abstract: To increase the long-distance power transmission capacity of renewable energy power stations, series compensation is a common solution. However, oscillation problems are introduced by the interaction between grid-connected inverter and series-compensated power lines, threatening the safe operation of the power system. To address this challenge, an extended impedance-emulating control strategy without the phase-locked loop is proposed,and the proposed method can stabilize the system in weak grids and high series compensation level grids. Besides, the effectiveness of the method is verified by stability analysis. Eigenvalues analysis is performed to guide parameter design. Finally, theoretical analysis and proposed control strategy are validated with simulation and experimental results.

Key words: series-compensated power grid, three-phase grid-connected inverters, sub-synchronous oscillation, impedance-emulating control

中图分类号:

TM46

邓紫妮, 粟梅, 孙尧, 林建亨. 面向串联补偿三相并网逆变器的模拟阻抗控制策略[J]. 湖南电力, 2023, 43(5): 31-37.

DENG Zini, SU Mei,SUN Yao, LIN Jianheng. Impedance-Emulating Control Strategy for Series-Compensated Three-Phase Grid-Connected Inverters[J]. Hunan Electric Power, 2023, 43(5): 31-37.

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面向串联补偿三相并网逆变器的模拟阻抗控制策略

Impedance-Emulating Control Strategy for Series-Compensated Three-Phase Grid-Connected Inverters

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