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An optimisation model based approach for power systems voltage stability and harmonic analysis

机译:基于优化模型的电力系统电压稳定性和谐波分析方法

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摘要

This paper presents a novel optimisation problem formulation for power systems voltage stability and harmonic analysis. The purpose is to evaluate the maximum loadability of an electrical power system considering voltage magnitudes, active/reactive powers, total and individual harmonic distortion limits as inequality constraints. The impact of power quality on the maximum loadability margin is evaluated based on the results of the optimisation problem solved by interior-point method and the proposed indices in which Lagrange multipliers are used to identify sensitive buses of electrical systems due to power quality degradation and voltage instability. Simulations are carried out using IEEE 30-bus power system assuming the insertion of non-linear loads to validate the use of the proposed method and show the applicability of the indices based on Lagrange multipliers for the assessment of both voltage stability and harmonic distortion. Results are compared with the traditional modal analysis to validate the ability of the proposed method for identifying the most critical buses of the system.
机译:本文介绍了电力系统电压稳定性和谐波分析的新颖优化问题配方。目的是评估考虑电压幅度,主动/无功功率,总和各个谐波失真限制的电力系统的最大可加载性,作为不平等约束。基于内点方法解决的优化问题的结果和所提出的指标来评估电能质量对最大可载数值的影响,其中利用拉格朗日乘法器识别由于电能质量劣化和电压导致电气系统的敏感总线不稳定。使用IEEE 30-BUS电力系统进行模拟,假设插入非线性负载以验证所提出的方法的使用并基于LAGRANG乘法器显示指数的适用性,以评估电压稳定性和谐波失真。结果与传统的模态分析进行了比较,以验证所提出的方法识别系统最关键的公交车的能力。

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