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arXiv 1903.06002eess.SYcs.SY
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分布式系统中含分布式电源的电压稳定性边界的相关性研究

Investigation of Relevant Distribution System Representation with DG for Voltage Stability Margin Assessment

Iowa State University(爱荷华州立大学)

Alok Kumar Bharati, Venkataramana Ajjarapu

AI总结:

本文研究了在配电网中包含不平衡负荷对电压稳定性边界评估的重要性,通过仿真方法分析不同不平衡负荷比例对电压稳定性边界的影响,并展示了通过配电网与输电网联合仿真实现的电压稳定性边界的评估方法。

摘要:

本文强调了在电力系统稳定性研究中包含配电网不平衡负荷的重要性。本文旨在:讨论电力系统分析的各种仿真方法;突出建模不平衡配电网以准确评估负载边界的重要性;展示净负荷不平衡(NLU)对电压稳定性边界(VSM)的影响。我们还分享了一个与商用电力系统求解器协同仿真的T&D接口。随着分布式能源资源(DERs)的快速普及,这些资源并不保证以平衡方式增长,由此产生的不确定性已被广泛认可。在没有详细表示配电网和输电网的情况下,无法捕捉或可视化这些不确定性。我们通过T&D联合仿真展示了DERs在不同三相比例下的增长对电压稳定性边界的影响,并研究了电压/无功控制对电压稳定性边界的影响。这种分析仅能通过T&D联合仿真对配电网进行详细表示来实现。配电网中较高的净负荷不平衡(NLU)会加剧配电网的稳定性边界,从而进一步负面影响整个系统的稳定性边界。

英文摘要:

This paper emphasizes the importance of including the unbalance in the distribution networks for stability studies in power systems. The paper aims to: discuss the various simulation methods for power system analysis; highlight the need for modeling unbalanced distribution system for accurate load margin assessment; demonstrate the influence of net-load unbalance (NLU) on voltage stability margin (VSM). We also share a T&D co-simulation interface with commercial power system solvers. The distribution system is evolving rapidly with high proliferation of distributed energy resources (DERs); these are not guaranteed to proliferate in a balanced manner and uncertainty resulting due to these DERs is well acknowledged. These uncertainties cannot be captured or visualized without representing the distribution system in detail along with the transmission system. We show the impact of proliferation of DERs in various 3-phase proportions on voltage stability margin through T&D co-simulation. We also study the impact of volt/VAR control on voltage stability margin. This analysis is only possible by representing the distribution system in detail through T&D co-simulation. Higher percentage of net-load unbalance (NLU) in distribution system aggravates the stability margin of the distribution system which can further negatively impact the overall stability margin of the system.

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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