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arXiv 2408.06008eess.SYcs.SY
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含变流器接口分布式能源的微电网谐波稳定性分析,第二部分:案例研究

Harmonic Stability Analysis of Microgrids with Converter-Interfaced Distributed Energy Resources, Part II: Case Studies

Johanna Kristin Maria Becker, Andreas Martin Kettner, Mario Paolone

AI总结:

本文通过构网型与跟网型CIDER案例及CIGRE低压系统,验证基于LTP/HSS模型的谐波稳定性评估可识别并解释谐波失稳。

摘要:

在本文第一部分中,提出了一种用于含高比例变流器接口分布式能源(CIDERs)电力系统谐波稳定性评估(HSA)的方法。具体而言,通过组合各组件的谐波状态空间(HSS)模型,推导了通用电力系统的HSS模型。CIDERs和电网的HSS模型基于线性时周期(LTP)模型,能够表示不同谐波之间的耦合。在第二部分中,对一个构网型CIDER和两个跟网型CIDER(分别不包含和包含直流侧建模)进行了HSA。更准确地说,给出了特征值分类、最大谐波阶次对特征值位置的影响,以及特征值相对于控制参数的灵敏度曲线。这些分析使得能够研究CIDERs特征值的物理意义和来源。此外,还对一个源自CIGRE低压基准系统的代表性示例系统进行了HSA。通过系统特征值识别出一个谐波不稳定案例,并在Simulink中利用时域仿真(TDS)进行了验证。结果表明,与基于线性时不变(LTI)模型的稳定性分析相反,HSA适用于检测谐波不稳定性。

英文摘要:

In Part I of this paper a method for the Harmonic Stability Assessment (HSA) of power systems with a high share of Converter-Interfaced Distributed Energy Resources (CIDERs) was proposed. Specifically, the Harmonic State-Space (HSS) model of a generic power system is derived through combination of the components HSS models. The HSS models of CIDERs and grid are based on Linear Time-Periodic (LTP) models, capable of representing the coupling between different harmonics. In Part II, the HSA of a grid-forming, and two grid-following CIDERs (i.e., ex- and including the DC-side modelling) is performed. More precisely, the classification of the eigenvalues, the impact of the maximum harmonic order on the locations of the eigenvalues, and the sensitivity curves of the eigenvalues w.r.t. to control parameters are provided. These analyses allow to study the physical meaning and origin of the CIDERs eigenvalues. Additionally, the HSA is performed for a representative example system derived from the CIGRE low-voltage benchmark system. A case of harmonic instability is identified through the system eigenvalues, and validated with Time-Domain Simulations (TDS) in Simulink. It is demonstrated that, as opposed to stability analyses based on Linear Time-Invariant (LTI) models, the HSA is suitable for the detection of harmonic instability.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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