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arXiv 2009.08490eess.SYcs.SY
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时空概率电压灵敏度分析--一种新的承载能力分析框架

Spatio-Temporal Probabilistic Voltage Sensitivity Analysis - A Novel Framework for Hosting Capacity Analysis

Sai Munikoti, Mohammad Abujubbeh, Kumarsinh Jhala, Balasubramaniam Natarajan

摘要:

智能电网被设想为适应分布式光伏(PV)发电的高渗透,这可能在电压违规方面引起不利的电网影响。因此,PV托管容量(HC)被用作规划工具,以确定导致第一次电压违规的最大PV安装容量以及需要基础设施升级的最大PV安装容量。传统的HC分析方法计算复杂,因为它们基于迭代潮流算法,需要调查大量的情况,以准确评估PV影响。本文首先提出了一种计算效率高的分析方法来计算由于随机分布的多个PV的随机行为而导致的特定节点处的电压变化的概率分布。接下来,导出的分布用于识别各种PV渗透水平的电压违规,并随后确定系统的HC,而不需要检查多个场景。建议的时空概率电压灵敏度分析和HC的结果进行了验证,通过传统的基于潮流的模拟方法的IEEE 37和IEEE 123节点测试系统。

英文摘要:

Smart grids are envisioned to accommodate high penetration of distributed photovoltaic (PV) generation, which may cause adverse grid impacts in terms of voltage violations. Therefore, PV Hosting capacity (HC) is being used as a planning tool to determine the maximum PV installation capacity that causes the first voltage violation and above which would require infrastructure upgrades. Traditional methods of HC analysis are computationally complex as they are based on iterative load flow algorithms that require investigation of a large number of scenarios for accurate assessment of PV impacts. This paper first presents a computationally efficient analytical approach to compute the probability distribution of voltage change at a particular node due to random behavior of randomly located multiple distributed PVs. Next, the derived distribution is used to identify voltage violations for various PV penetration levels and subsequently determine the HC of the system without the need to examine multiple scenarios. Results from the proposed spatio-temporal probabilistic voltage sensitivity analysis and the HC are validated via conventional load flow based simulation approach on the IEEE 37 and IEEE 123 node test systems.

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