利用OpenDSS中的微分代数方程对光伏发电机组高渗透配电系统进行动态分析

A. Nagarajan, R. Ayyanar
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引用次数: 10

摘要

分布式能源在现有配电馈线上的大规模渗透影响了配电馈线的动态行为,为对配电馈线进行暂态分析提供了动力。但是,基于传统的时域方法进行暂态分析非常耗时且不切实际。此外,配电系统分析工具(OpenDSS)中现有的光伏发电模型仅能支持快照和准静态分析。捕获光伏发电机的动态效应对于诸如控制器带宽的影响、多个电压校正装置的影响和反孤岛研究等研究是必要的。本文以IEEE 37总线测试馈线为基础,提出了一种基于微分代数方程(DAE)的OpenDSS配电馈线动态分析的数学方法。本文详细探讨了利用DAE分析大型光伏发电机组对现有配电馈线的影响。该方法将所选状态建模为常微分方程,将分配系统的其余部分建模为代数方程。基于DAE的过程在处理专有供应商提供的模型方面是有效的。与传统的时域技术相比,采用上述方法可以显著减少计算时间。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamic analysis of distribution systems with high penetration of PV generators using differential algebraic equations in OpenDSS
Large-scale penetration of distributed energy resources on the existing distribution feeders impact the dynamic behavior and pose the motivation to perform a transient analysis on the distribution feeders. But, performing transient analysis based on conventional time domain approach is extremely time consuming and impractical. Besides, existing models of the PV generator in the distribution system analysis tools (OpenDSS) are just capable of supporting the snapshot and quasi-static analyses. Capturing the dynamic effects of the PV generators will be necessary for studies such as the effect of controller bandwidth, effect of multiple voltage correction devices, and anti-islanding studies. Considering an IEEE 37-bus test feeder as basis this paper proposes a mathematical approach based on differential algebraic equations (DAE) for performing dynamic analysis of distribution feeders in OpenDSS. In a detailed manner, this paper explores the use of DAE for the impact analysis of large PV generators on the existing distribution feeders. This approach models selected states as ordinary differential equations with rest of the distribution system as algebraic equations. The procedure based on DAE is effective in handling proprietary vendor-supplied models. Significant reduction in the computation time has been obtained by employing the above mentioned approach as compared with a conventional time domain technique.
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