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首页> 外文期刊>Electric power systems research >Tracing harmonic distortion and voltage unbalance in secondary radial distribution networks with photovoltaic uncertainties by an iterative multiphase harmonic load flow
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Tracing harmonic distortion and voltage unbalance in secondary radial distribution networks with photovoltaic uncertainties by an iterative multiphase harmonic load flow

机译：迭代多相谐波流量追踪辅助径向分布网络中辅助分布网络中的谐波失真和电压不平衡

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摘要

Secondary radial distribution networks (SRDNs) have been increasingly affected by the uncertainties of harmonic sources associated with photovoltaic (PV) systems. The quantitative assessment of uncertainty propagation causing harmonic distortion and voltage unbalance can be successively handled by probabilistic or affine formulations of harmonic load flows (HLFs). This study developed a general analytical technique (GAT) for solving iterative multiphase HLFs in SRDNs with PV uncertainties. This technique merges the point-estimate method (PEM) and complex affine arithmetic (AA), combined with Legendre series approximation (LGSA). It also models the input correlation. One advantage of this GAT is that the iterative harmonic penetration (IHP) method, modeled for HLF, accounts for the interaction of background harmonic voltage with the PV harmonic current. The first prerequisite was evidently an uncertainty model for PV harmonic current. This paper presents the results for a real unbalanced three-phase SRDN and compares them with those obtained with the Monte-Carlo simulation (MCS). These confirmed the accuracy of GAT as well as its lower computational cost. The numerical results obtained showed that the GAT outperformed the incomplete GAT (IGAT), which is solely based on PEM and Cornish-Fisher expansion, thanks to the ability of AA to bound the outputs used in the LGSA.
机译：辅助径向分配网络（SRDN）越来越受到与光伏（PV）系统相关的谐波源的不确定性的影响。通过呼声负荷流量（HLF）的概率或仿射配方可以连续处理导致谐波失真和电压不平衡的不确定度传播的定量评估。本研究开发了一种用于在具有光伏不确定性的SRDN中求解迭代多相HLF的一般分析技术（GAT）。该技术合并点估计方法（PEM）和复杂仿射算术（AA），与Legendre系列近似（LGSA）组合。它还模拟输入相关性。该GAT的一个优点是，用于HLF的迭代谐波渗透（IHP）方法，用于与PV谐波电流的背景谐波电压的相互作用。第一个先决条件是PV谐波电流的不确定性模型。本文介绍了真正不平衡三相SRDN的结果，并将它们与Monte-Carlo仿真（MCS）一起比较。这些证实了GAT的准确性以及其较低的计算成本。获得的数值结果表明，由于AA结合LGSA中使用的输出的能力，因此，GAT概述了不完全的GAT（IGAT），其仅基于PEM和康沃尔群扩张。

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