Research on Vibration Characteristics of Converter Transformer Under the Influence of Harmonic Voltage and Harmonic Current

Pan, Zhicheng; Lv, Jinzhuang; Deng, Jun; Xie, Zhicheng; Zhou, Haibin

doi:10.1109/powercon53785.2021.9697659

Cited by 4 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the impact of harmonic current, the vibration of converter transformer winding is generally one order of magnitude higher or even greater than that of ordinary power transformer [29]. Under the action of long-term large vibration as well as complex magnetism, and high working temperature, the converter transformer winding is prone to mechanical fault such as looseness.…”

Section: Winding Looseness Condition Detection Based On Online Vframentioning

confidence: 99%

Converter Transformer Winding Mechanical Condition Detection Using Online Vibration Frequency Response Analysis Method

Zhang

et al. 2023

Preprint

View full text Add to dashboard Cite

The harmonic current and vibration of the converter transformer are effective information for detecting winding mechanical faults. This paper proposes an online vibration frequency response analysis (VFRA) method and constructs a novel vibration frequency response function (VFRF), where the VFRF is defined as the ratio of vibration acceleration to current squared. A harmonic loading system simulating the actual operating situation of the converter transformer is established, and it is verified by numerical analysis and experimental methods that online VFRA is a simpler and more convenient method for winding mechanical condition detection than offline VFRA. The effects of different factors such as current magnitude and harmonic content on the online VFRA are investigated, and the converter transformer winding mechanical condition is detected by combining the VFRF trace with two numerical indices of relative factor and improved expectation. Laboratory experiments demonstrate that the online VFRA has high stability and successfully identify winding looseness faults of different degrees. Compared with the traditional frequency response analysis (FRA) and short-circuit impedance (SCI) methods, the online VFRA has higher sensitivity and detection capability for winding mechanical faults, and is a better method for online monitoring of winding mechanical condition.

show abstract

Section: Winding Looseness Condition Detection Based On Online Vframentioning

confidence: 99%

Converter Transformer Winding Mechanical Condition Detection Using Online Vibration Frequency Response Analysis Method

Zhang

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…In the 21st century, the current transformer calibration technology has gradually shown a trend of intelligence [5][6][7][8][9][10][11][12]. Traditional calibration requires manual inspection, and in order to reduce manpower and improve efficiency, a system was designed for the automatic inspection of finished CT products, which can be used for the appearance inspection of inductors, an insulation resistance test, a frequency withstand voltage test, a secondary winding turn-to-turn insulation test, a magnetic saturation margin test and error measurement [13][14][15][16][17]. In an effort to increase the range and improve accuracy, some researchers have also created online calibration systems.…”

Section: Introductionmentioning

confidence: 99%

Optimization Design Study of a Full-Range Charged Calibration Device for a Low-Voltage Current Transformer

Ding,

Feng,

Bai

et al. 2024

Energies

View full text Add to dashboard Cite

According to standards, the harmonic content should be less than 5% at the time of calibration, while the calibration index proposed in this paper stipulates that the primary current amplitude of 1%~120% of the full range of the accuracy level reaches 0.05 S level. In view of the above problems and indexes, this paper adopts the active regulation technology of primary current; firstly, the harmonics of primary current are extracted, and then the opposite harmonic currents are injected by the penetrating wire to offset the harmonics, and finally, charged calibration is carried out. The inductive current transformer charged calibration device was first designed, and the particle swarm algorithm was used to optimize the offset performance of the key link of the background current offset suppression. The transfer function of the offset loop was derived, and it was theoretically analyzed that it can meet the offset requirements up to the 200th harmonic. The results show that the optimized calibration method can realize the full-range calibration of low-voltage inductive current transformers under charged conditions by making a prototype of the device and constructing a test circuit for experiments, and measuring the data and analyzing them.

show abstract

“…What' s more, the passive filters are always mounted on the gird side of the converter transformer. Therefore, in the traditional HVDC system, harmonic currents will inevitably flow through the windings of the converter transformer, causing sever vibration and noise [21].…”

Section: Introductionmentioning

confidence: 99%

Capacitive Filter Based HVDC Converter for Reducing the Vibration and Noise of Converter Transformer

Zhao

Luo

et al. 2022

IEEE Access

View full text Add to dashboard Cite

Harmonic currents generated by converters in the HVDC system flow into the converter transformer. The harmonic current and voltage in the converter transformer will cause electromagnetic vibration of windings and iron core, which result in serious noise pollution, power loss and electrical stressing. In this paper, a capacitive filter based HVDC converter is proposed to reduce the vibration and noise of converter transformer. First, the topology of the HVDC system is introduced, and its harmonic characteristics are analyzed. Then, the noise reduction mechanism by using capacitive filter is revealed by analyzing the relationship among harmonics, vibration, and noise of the converter transformer. Finally, the experimental platform of the capacitive filter based HVDC system is built. Moreover, the vibration and noise of the converter transformers are measured in a semi-anechoic chamber, with the use of line-commutated converter (LCC) and capacitive filter based HVDC converter respectively. The experimental results show that the vibration and noise of converter transformer using the capacitive filter are significantly suppressed compared with that using the LCC.

show abstract

Research on Vibration Characteristics of Converter Transformer Under the Influence of Harmonic Voltage and Harmonic Current

Cited by 4 publications

References 1 publication

Converter Transformer Winding Mechanical Condition Detection Using Online Vibration Frequency Response Analysis Method

Converter Transformer Winding Mechanical Condition Detection Using Online Vibration Frequency Response Analysis Method

Optimization Design Study of a Full-Range Charged Calibration Device for a Low-Voltage Current Transformer

Capacitive Filter Based HVDC Converter for Reducing the Vibration and Noise of Converter Transformer

Contact Info

Product

Resources

About