Harmonic Analysis and Cancellation of Inverter Systems with Linear <scp>Phase‐Shifting</scp> Transformer

Zhou, Changduo; Zhao, Jinghong; Wang, Hanming; Yan, Sinian; Yan, Dongao

doi:10.1002/tee.23888

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…Harmonic currents in the inverter are generated because of usage pulse-width modulation [58]. In power systems, harmonics are generally managed by adding filters, circuit detuning, and usage of phase-shifting transformers [59] or inverters with harmonic current compensation compatibility [60].…”

Section: Methodsmentioning

confidence: 99%

Improved Methodology for Power Transformer Loss Evaluation: Algorithm Refinement and Resonance Risk Analysis

Plienis,

Deveikis,

Jonaitis

et al. 2023

Energies

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The decline in power quality within electrical networks is adversely impacting the energy efficiency and safety of transmission elements. The growing prevalence of power electronics has elevated harmonic levels in the grid to an extent where their significance cannot be overlooked. Additionally, the increasing integration of renewable energy sources introduces heightened fluctuations, rendering the prediction and simulation of working modes more challenging. This paper presents an improved algorithm for calculating power transformer losses attributed to harmonics, with a comprehensive validation against simulation results obtained from the Power Factory application and real-world measurements. The advantages of the algorithm are that all evaluations are performed in real-time based on single-point measurements, and the algorithm was easy to implement in a Programmable Logic Controller (PLC). This allows us to receive the exchange of information to energy monitoring systems (EMSs) or with Power factor Correction Units (PFCUs) and control it. To facilitate a more intuitive understanding and visualization of potential hazardous scenarios related to resonance, an extra Dijkstra algorithm was implemented. This augmentation enables the identification of conditions, wherein certain branches exhibit lower resistance than the grid connection point, indicating a heightened risk of resonance and the presence of highly distorted currents. Recognizing that monitoring alone does not inherently contribute to increased energy efficiency, the algorithm was further expanded to assess transformer losses across a spectrum of Power Factory Correction Units power levels. Additionally, a command from a PLC to a PFCU can now be initiated to change the capacitance level and near-resonance working mode. These advancements collectively contribute to a more robust and versatile methodology for evaluating power transformer losses, offering enhanced accuracy and the ability to visualize potentially critical resonance scenarios.

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Section: Methodsmentioning

confidence: 99%

Improved Methodology for Power Transformer Loss Evaluation: Algorithm Refinement and Resonance Risk Analysis

Plienis,

Deveikis,

Jonaitis

et al. 2023

Energies

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“…It can be seen from Ref. [1] that the equivalent output voltage 24-step wave of the inverter in Fourier series form can be expressed as…”

Section: Primarymentioning

confidence: 99%

“…As an important carrier for the realization of multiple superimposed inverter technology, phase-shifting transformers are mainly divided into three types: core type, circular type, and linear type. Compared with the first two types of phase-shifting transformers, the linear phase-shifting transformer (LPST) can not only realize the functions of phase-shifting and superposition, but also has the advantages of arbitrary angle phase-shifting, good expansibility, and easy modularization [1].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Vibration and Noise Analysis of Linear Phase-Shifting Transformer

Yan,

Zhao,

Yan

et al. 2024

Energies

Self Cite

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The advantages of adjustable angle phase-shifting and great expansibility make the linear phase-shifting transformer a novel type of power conversion device with a wide range of potential applications. However, during the procedure, there is a lot of noise. For the purposes of transformer design and vibration and noise reduction, it is crucial to investigate its electromagnetic vibration and noise. In this paper, the radial electromagnetic force wave considering the influence of the end effect as the source of the noise of the linear phase-shifting transformer was deduced and calculated. Based on this, the spectrum and space–time properties of the radial electromagnetic force waves were simulated and verified. Additionally, a finite element model was created using the Ansys Workbench 2022R1 platform to study the electromagnetic vibration and noise of the linear phase-shifting transformer. A joint simulation of the electromagnetic, structural, and sound fields was then performed. First, the transformer’s natural frequency was determined by modal analysis. After that, the transformer’s structure and the results of the transient electromagnetic field computation were combined and a harmonic response analysis was conducted to determine the vibration acceleration spectrum. Finally, in order to solve the sound pressure field, the transformer’s boundary vibration acceleration was coupled to the air domain. Furthermore, an analysis was conducted to determine the noise distribution surrounding the linear phase-shifting transformer. The joint simulation findings demonstrate that the linear phase-shifting transformer’s resonance, which produces larger electromagnetic vibration and noise, is indeed caused by the radial electromagnetic force. Simultaneously, the impact of the LPST core’s fixed components on the electromagnetic vibration and noise of the core was examined.

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The effect of phase-shifting transformer angle value on system congestion and determination of ideal phase angle

Aydin,

Yigit,

Acarkan

2024

Electr Eng

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Harmonic Analysis and Cancellation of Inverter Systems with Linear Phase‐Shifting Transformer

Cited by 3 publications

References 6 publications

Improved Methodology for Power Transformer Loss Evaluation: Algorithm Refinement and Resonance Risk Analysis

Improved Methodology for Power Transformer Loss Evaluation: Algorithm Refinement and Resonance Risk Analysis

Electromagnetic Vibration and Noise Analysis of Linear Phase-Shifting Transformer

The effect of phase-shifting transformer angle value on system congestion and determination of ideal phase angle

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