光火打捆直流送出环境下系统宽频振荡机理及特性分析

马燕峰; 赵茜; 赵书强; 李然; 高丽

doi:10.19912/j.0254-0096.tynxb.2022-1864

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太阳能学报 ›› 2024, Vol. 45 ›› Issue (4) : 382-393. DOI: 10.19912/j.0254-0096.tynxb.2022-1864

光火打捆直流送出环境下系统宽频振荡机理及特性分析

马燕峰, 赵茜, 赵书强, 李然, 高丽

作者信息 +

ANALYSIS OF BROADBAND OSCILLATION MECHANISM AND CHARACTERISTICS OF PHOTOVOLTAIC-THERMAL BUNDLED SYSTEM UNDER DC OUTPUT ENVIRONMENT

Ma Yanfeng, Zhao Qian, Zhao Shuqiang, Li Ran, Gao Li

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文章历史 +

摘要

针对大规模光伏和火电打捆经传统高压直流输电（LCC-HVDC）送出系统并网引发的宽频振荡问题,首先,建立状态空间模型和阻抗模型,并证明简化火电模型无法体现光火和直流交互作用模式,需采用六阶详细火电模型,进而在此模型基础上用特征值法计算出系统可能存在的振荡频率;其次,通过阻抗法分析系统宽频振荡和交互作用机理以及参数变化对系统振荡模式的影响;最后,通过PSCAD/EMTDC平台验证系统宽频振荡机理及影响因素作用效果的正确性。结果表明：宽频振荡是在某些频段下由系统的负阻尼特性所引发;元件参数的改变会通过影响系统阻尼改变宽频振荡幅值,进一步给出滤波器及换流器的合理参数范围。

Abstract

In view of the broadband oscillation problem caused by the grid-connection of large-scale photovoltaic-thermal bundled integration system via traditional high voltage direct current （LCC-HVDC） transmission system, firstly, the state-space model and impedance model are established in this paper. The results show. that the simplified thermal power model cannot reflect the interaction mode between photovoltaic-thermal bundled integration and LCC-HVDC. Therefore, a six-order detailed thermal power model must be adopted, and then the possible oscillation frequency of the system was calculatedby eigenvalue method. Secondly, impedance method is used to analyze the broadband oscillation, interaction mechanism of the system and the influence of parameter change on the oscillation mode of the system. Finally, PSCAD/EMTDC platform was used to verify the mechanism of broadband oscillation and the effect of the influencing factors. The results show that the broadband oscillation is caused by the negative damping characteristics of the system in some frequency bands. The change of element parameters will change the amplitude of broadband oscillation by affecting the damping of the system. Furthermore, the reasonable parameter range of filter and converter is obtained.

导出引用

马燕峰, 赵茜, 赵书强, 李然, 高丽. 光火打捆直流送出环境下系统宽频振荡机理及特性分析[J]. 太阳能学报. 2024, 45(4): 382-393 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1864

Ma Yanfeng, Zhao Qian, Zhao Shuqiang, Li Ran, Gao Li. ANALYSIS OF BROADBAND OSCILLATION MECHANISM AND CHARACTERISTICS OF PHOTOVOLTAIC-THERMAL BUNDLED SYSTEM UNDER DC OUTPUT ENVIRONMENT[J]. Acta Energiae Solaris Sinica. 2024, 45(4): 382-393 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1864

中图分类号： TM712

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