基于运行短路比的新能源场站换流器模式切换技术研究

张展; 肖晃庆; 刘文泽; 易斌

doi:10.19912/j.0254-0096.tynxb.2024-0469

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太阳能学报 ›› 2025, Vol. 46 ›› Issue (7) : 279-289. DOI: 10.19912/j.0254-0096.tynxb.2024-0469

第二十七届中国科协年会学术论文

基于运行短路比的新能源场站换流器模式切换技术研究

张展¹, 肖晃庆^1,2, 刘文泽¹, 易斌³

作者信息 +

RESEARCH ON MODE SWITCHING TECHNOLOGY OF VOLTAGE-SOURCE CONVERTERS IN ENERGY STATIONS BASED ON OPERATING SHORT-CIRCUIT RATIO

Zhang Zhan¹, Xiao Huangqing^1,2, Liu Wenze¹, Yi Bin³

Author information +

文章历史 +

摘要

针对现有基于短路比指标的电压源换流器跟网/构网模式切换运行方案在切换边界的整定方面未考虑有功功率波动、准确性有所欠缺的问题,首先使用特征值分析法分析构网型换流器容量占比、有功功率与短路比对场站振荡特性的影响规律,然后从保持场站在低频和次同步频段振荡稳定性的角度提出基于运行短路比指标的换流器跟网/构网模式的切换运行方案。仿真结果表明使用运行短路比指标在有功功率不满发的工况下能合理选择控制模式,切换次数更少,受扰后稳定性更强。

Abstract

In order to solve the problem that the existing grid-following/grid-forming mode switching scheme of voltage-source converters based on short circuit ratio does not consider the fluctuation of active power and lacks accuracy in the setting of switching boundary, this paper analyzes the influence of the proportion of the grid-forming voltage-source converters’ capacity, the active power and the short circuit ratio on the oscillation characteristics of the station. And then, from the perspective of maintaining the oscillation stability of the station in the low frequency and subsynchronous frequency band, a switching operation scheme based on the operating short-circuit ratio is proposed. The results show that using operation short circuit ratio can select the control mode more reasonably under the condition of low active power. Therefore, the switching frequency decreases, and the stability after disturbance improves.

导出引用

张展, 肖晃庆, 刘文泽, 易斌. 基于运行短路比的新能源场站换流器模式切换技术研究[J]. 太阳能学报. 2025, 46(7): 279-289 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0469

Zhang Zhan, Xiao Huangqing, Liu Wenze, Yi Bin. RESEARCH ON MODE SWITCHING TECHNOLOGY OF VOLTAGE-SOURCE CONVERTERS IN ENERGY STATIONS BASED ON OPERATING SHORT-CIRCUIT RATIO[J]. Acta Energiae Solaris Sinica. 2025, 46(7): 279-289 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0469

中图分类号： TM712

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