Aggregate Harmonic Load Models of Residential Customers. Part 2: Frequency-Domain Models

Guo, Zekun; Meyer, Jan; Al-Shibli, N.; Xiao, Xiangning; Djokić, Saša Ž.; Collin, Adam J.; Langella, R.; Testa, A.; Papič, I.; Blanco, A. M.

doi:10.1109/isgteurope.2019.8905746

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…The BF-NC strategy was established as a reference for the performance analysis because, within the load models in the frequency domain studied in this research, the Norton model equivalent to the coupled admittance matrix presented in the literature accurately estimates the current of a nonlinear load (23,25,(27)(28)(29)(30).…”

Section: Performance Analysis Of the Strategiesmentioning

confidence: 99%

Performance Analysis of a Backward/Forward Algorithm Adjusted to a Distribution Network with Nonlinear Loads and a Photovoltaic System

Martinez-Peñaloza,

Ordóñez-Plata,

Osma-Pinto

2023

Ing.

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Context: The backward/forward (BF) algorithm is a sweep-type technique that has recently been used as a strategy for the power flow analysis of ill-conditioned networks. The purpose of this study is to evaluate the performance of the BF algorithm compared to that of a computational tool such as Simulink, with both strategies adjusted to the operating conditions of a distribution network with nonlinear components (loads and photovoltaic system), unbalanced loads, and harmonic distortion in the voltage and current signals. Method: The study case is a low-voltage distribution network with a radial topology, unbalanced loads, and nonlinear components. The BF algorithm is adjusted to consider two approaches of the Norton model: a coupled admittance matrix and a decoupled admittance matrix. The latter is also used in the network model created in Simulink. The performance of the algorithm is evaluated by analyzing 18 operation scenarios defined according to the presence and use intensity of the loads and solar irradiance levels (low and high). Results: In general, the three strategies could successfully determine the waveform and RMS values of the voltage signals with errors of less than 0,8 and 1,3%, respectively. However, the performance of the strategies for the estimation of current signals and power parameters shows errors of 5-300% depending on the level of solar irradiance at which the photovoltaic system operates. Conclusions: The results show that the BF strategy can be used to analyze unbalanced power grids with increasing penetration of renewable generation and the integration of nonlinear devices, but the performance of this strategy depends on the load model applied to represent the behavior of nonlinear devices and generation systems.

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Section: Performance Analysis Of the Strategiesmentioning

confidence: 99%

Performance Analysis of a Backward/Forward Algorithm Adjusted to a Distribution Network with Nonlinear Loads and a Photovoltaic System

Martinez-Peñaloza,

Ordóñez-Plata,

Osma-Pinto

2023

Ing.

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“…The most commonly used models are the current source model and the harmonic impedance model (Chang et al, 2004 ). These help estimate the impact of voltage and current signals on the waveform and have proven be effective in modeling non-linear loads, regardless of the characteristics of the distribution network (Caicedo et al, 2017b, Fölting et al, 2014, Ge, X & Liu, 2020, Guo et al, 2019, Xiao et al, 2017.…”

Section: Introductionmentioning

confidence: 99%

Parameter Determination of Coupled and Decoupled Admittance Matrix Methods of the Norton Equivalent Model for an Air Extractor

Peñaloza

Osma-Pinto

Ordóñez-Plata

2022

Tecnura

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Context: Studies carried out in low voltage networks have explored the modeling of linear single-phase loads (such as motors) and non-linear ones (such as those based on power electronics). However, induction motors exhibit non-linear characteristics between voltage and current due to the saturation of their magnetic parts. Therefore, it is necessary to study induction motors in the frequency domain with a model that allows reviewing the characteristic nonlinearity of their voltage-current interaction. Methodology: This article presents the frequency domain modeling of a single-phase induction motor used as a silent air extractor (127 V, 60 Hz, 66 W), which presents a capacitive behavior (fp = 0,93 in leading) and harmonic distortion due to a third-order component (7,0%) when fed with a pure sinusoidal voltage of 127 V. Results: This work establishes the parameters of two approaches to the Norton equivalent model (coupled and decoupled admittance matrix) which are used to estimate the distorted current signal and the values of consumed active and non-active power. The results show comparisons errors of P, Q, THDi, and NRMSE indices of less than 7, 4, 14, and 3%, respectively. Conclusions: The parameters of the Norton equivalent model estimated for the single-phase induction motor allow calculating the current signal with a high degree of precision. This signal exhibits nonlinear characteristics and a capacitive behavior due to the permanent presence of a capacitor aiding the start and operation of the engine.

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Aggregate Harmonic Load Models of Residential Customers. Part 1: Time-Domain Models

Guo

Meyer

Al-Shibli

et al. 2019

2019 IEEE PES Innovative Smart Grid Technologies Europe (ISGT-Europe)

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Aggregate Harmonic Load Models of Residential Customers. Part 2: Frequency-Domain Models

Cited by 3 publications

References 4 publications

Performance Analysis of a Backward/Forward Algorithm Adjusted to a Distribution Network with Nonlinear Loads and a Photovoltaic System

Performance Analysis of a Backward/Forward Algorithm Adjusted to a Distribution Network with Nonlinear Loads and a Photovoltaic System

Parameter Determination of Coupled and Decoupled Admittance Matrix Methods of the Norton Equivalent Model for an Air Extractor

Aggregate Harmonic Load Models of Residential Customers. Part 1: Time-Domain Models

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