摘要
随着电力电子设备和新能源机组的大规模接入,电力系统电磁暂态特性发生显著变化,暂态谐波、谐波谐振、谐波不稳定等多类型谐波扰动频繁发生。尽管这些术语中都包含“谐波”一词,表征电压或电流出现了宽频段的波形畸变,但严格意义上这些谐波扰动属于不同的电力系统研究领域,需采用不同的建模与分析方法。目前,鲜有研究对多类型谐波扰动之间的关联性进行探讨。文中首先以谐振为核心阐述了多类型谐波扰动的关联性及全面评估的必要性。然后,回顾了不同类型谐波扰动的常用建模方法,探讨了谐波状态空间(HSS)理论与其他主流建模方法的内在联系,以及其在通用化建模与机理解释方面的优势。进一步,以高压直流输电系统为例,建立HSS模型来分析暂态谐波动态过程、谐波传导特性以及谐波不稳定风险。结果表明,HSS模型通过谐波耦合矩阵有效揭示了高压直流输电系统在暂态与稳态下的谐波耦合特性,且线性化后的谐波不稳定分析具有更高的准确性。最后,针对HSS模型维数高、计算耗时长的缺点,提出了数据驱动赋能HSS建模与分析的展望,进一步推动HSS在新型电力系统多类型谐波扰动分析中的应用。
With the large-scale integration of power electronic devices and renewable energy units,the electromagnetic transient characteristics of power systems have changed significantly,and multiple types of harmonic disturbances such as transient harmonic,harmonic resonance,and harmonic instability,occur frequently.Although all these terms contain the word“harmonic”,indicating broadband waveform distortion in voltage or current,strictly speaking,these harmonic disturbances belong to different research fields within the power system and require different modeling and analysis methods.At present,few study has explored the interrelations among multi-type harmonic disturbances.This paper first focuses on resonance to explain the correlations among various types of harmonic disturbances and the necessity of comprehensive assessment.Then,it reviews commonly used modeling methods for various harmonic disturbances,explores the inherent connections between the harmonic state space(HSS)theory and other mainstream modeling methods,and discusses its advantages in generalized modeling and mechanism interpretation.Furthermore,using a high-voltage direct current(HVDC)transmission system as an example,an HSS model is established to analyze the dynamic process of transient harmonics,harmonic propagation characteristics,and the risk of harmonic instability.The results show that the HSS model effectively reveals the harmonic coupling characteristics of HVDC transmission systems in both transient and steady-state conditions through the harmonic coupling matrix,and the linearized harmonic instability analysis has higher accuracy.Finally,in view of the high dimensionality and long computation time of the HSS model,this paper proposes a prospect of data-driven enhancement for HSS modeling and analysis,to further promote the application of HSS in the analysis of various harmonic disturbances in new power systems.
作者
王杨
梁智昊
王翰文
汪颖
肖先勇
WANG Yang;LIANG Zhihao;WANG Hanwen;WANG Ying;XIAO Xianyong(College of Electrical Engineering,Sichuan University,Chengdu 610065,China)
出处
《电力系统自动化》
北大核心
2025年第23期1-16,共16页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(52177104)。
关键词
新型电力系统
电能质量
暂态谐波
稳态谐波
高压直流
谐波谐振
频域建模
谐波状态空间
new power system
power quality
transient harmonic
steady-state harmonic
high-voltage direct current(HVDC)
harmonic resonance
frequency-domain modeling
harmonic state space 16
