Determination of single-phase transformer saturation characteristic by using Nelder–Mead optimization method

Tokić, Amir; Kasumović, Mensur; Pejić, Marina; Milardić, Viktor; Akıncı, Tahir Çetin

doi:10.1007/s00202-020-01156-7

Cited by 5 publications

(2 citation statements)

References 25 publications

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“…The high-frequency rotating voltage injection method is widely used for salient pole tracking. It can estimate the rotor's position by injecting a high-frequency rotating voltage vector and processing a high-frequency current [ 7 ]. Feng et al (2020) designed an improved feedback gain matrix based on the Luenberger observer to apply the high-quality vector control of speed sensorless to variable frequency all-in-one machine.…”

Section: Introductionmentioning

confidence: 99%

“…Finally, the feasibility and effectiveness of the proposed method were proved by simulation [6]. Tokić et al (2021) stated that a permanent magnet synchronous motor has the advantages of small volume, small inertia, and light weight, so it is increasingly widely used in various fields. At present, vector control and direct torque control are most used in various control algorithms of permanent magnet synchronous motors.…”

Section: Introductionmentioning

confidence: 99%

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Application and Optimization of Luenberger Observer Phase-Locked Loop and Inductance-Free Vector Control Method for Aviation Three-Phase Converter in Wearable Equipment

Zeng

Yan

2022

Computational Intelligence and Neuroscience

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This work aims to strengthen the comprehensive performance of the Luenberger observer in the application of aviation three-phase converter and in physical exercise wearable devices to effectively detect human physiological signals. Firstly, the use status and characteristics of three-phase converters are discussed. Then, the Luenberger observer and its optimization process are described. Finally, the Luenberger observer is optimized through phase-locked loop technology and the vector control method. The experimental results indicate that the PLL of the steady-state linear Kalman filter is applicable to the multielectric aircraft converter for the aviation variable frequency power supply. The phase-locked loop of the steady-state linear Kalman filter is complicated, and the output angular frequency is inconsistent with the angular frequency of the actual voltage of the aircraft variable-frequency power supply. Consequently, it does not have the function of frequency locking. On the contrary, the Luenberger observer phase-locked loop designed here is suitable for the multielectric aircraft converter for the aircraft variable-frequency power supply. In addition, it is simpler than the steady-state linear Kalman filter phase-locked loop and realizes the frequency-locking function. In addition, the vector control method significantly improves the control performance of the Luenberger observer. The control error of the original observer is about 0.24°, and the control error of the optimized observer is about 0.18°. This work provides technical support for the performance optimization of the Luenberger observer and contributes to the performance improvement of the aviation three-phase converter.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application and Optimization of Luenberger Observer Phase-Locked Loop and Inductance-Free Vector Control Method for Aviation Three-Phase Converter in Wearable Equipment

Zeng

Yan

2022

Computational Intelligence and Neuroscience

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Characterization of electrical 1-phase transformer parameters with guaranteed hotspot temperature and aging using an improved dwarf mongoose optimizer

Rizk‐Allah

El‐Fergany

Gouda

et al. 2023

Neural Comput & Applic

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Parameters identification of Electric Power Transformer (EPT) models is significant for the steady and consistent operation of the power systems. The nonlinear and multimodal natures of EPT models make it challenging to optimally estimate the EPT’s parameters. Therefore, this work presents an improved Dwarf Mongoose Optimization Algorithm (IDMOA) to identify unknown parameters of the EPT model (1-phase transformer) and to appraise transformer aging trend under hottest temperatures. The IDMOA employs a population of solutions to get as much information as possible within the search space through generating different solution’ vectors. Furthermore, the Nelder–Mead Simplex method is incorporated to efficiently promote the neighborhood searching with the aim to find a high-quality solution during the iterative process. At initial stage, power transformer electrical equivalent extraction parameters are expressed in terms of the fitness function and its corresponding operating inequality restrictions. In this sense, the sum of absolute errors (SAEs) among numerous factors from nameplate data of transformers is to be minimized. The proposed IDMOA is demonstrated on two transformer ratings as 4 kVA and 15 kVA, respectively. Moreover, the outcomes of the IDMOA are compared with other recent challenging optimization methods. It can be realized that the lowest minimum values of SAEs compared to the others which are 3.3512e−2 and 1.1200e−5 for 15 kVA and 4 kVA cases, respectively. For more assessment for the proposed optimizer, the extracted parameters are utilized to evaluate the transformer aging considering the transformer hottest temperature compared with effect of the actual parameters following the IEEE Std C57.91 procedures. It is proved that the results are guaranteed, and the transformer per unit nominal life is 1.00 at less than 110 °C as per the later-mentioned standard.

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Extraction of transformer saturation curve from ferroresonance measurements based on Nelder− Mead optimization method

Milardić

Tokić

Uglešić

et al. 2023

Electric Power Systems Research

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Determination of single-phase transformer saturation characteristic by using Nelder–Mead optimization method

Cited by 5 publications

References 25 publications

Application and Optimization of Luenberger Observer Phase-Locked Loop and Inductance-Free Vector Control Method for Aviation Three-Phase Converter in Wearable Equipment

Application and Optimization of Luenberger Observer Phase-Locked Loop and Inductance-Free Vector Control Method for Aviation Three-Phase Converter in Wearable Equipment

Characterization of electrical 1-phase transformer parameters with guaranteed hotspot temperature and aging using an improved dwarf mongoose optimizer

Extraction of transformer saturation curve from ferroresonance measurements based on Nelder− Mead optimization method

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