Influence of Metal Shield Materials on Electromagnetic Field and Losses in End Region of Synchronous Condenser

Xu, Guorui; Liu, Ran; Li, Zhiqiang; Zhan, Yang; Zhao, Haisen; Song, Meihong

doi:10.1109/tia.2021.3071103

Cited by 16 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the widespread application and development of electronic products, electronic devices with high power, fast operation, small size, and satisfactory portability emanate diversified electromagnetic waves to the surrounding environment, − which conversely affects the functions of electronic devices and causes adverse health issues to living beings. − Materials with large permittivity and permeability are widely used in the field of electromagnetic interference (EMI) shielding. − Moreover, highly effective EMI shielding materials with ultrathin thickness and high electromagnetic shielding performance seem to be predictably imperative to reduce the health hazards of electromagnetic wave to surrounding organisms and to repel electromagnetic wave pollution in highly sensitive microelectronic devices for ensuring the reliable operation of electronic equipment.…”

Section: Introductionmentioning

confidence: 99%

Multilayer Ultrathin MXene@AgNW@MoS₂ Composite Film for High-Efficiency Electromagnetic Shielding

Xing

Wan

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Structure and material composition is crucial in realizing high electromagnetic interference (EMI) shielding effectiveness (SE). Herein, an ultrathin MXene@AgNW@MoS 2 (MAM) composite film that resembles the structure of a pork belly and exhibits superior EMI shielding performance was fabricated via the vacuum-assisted suction filtration process and atomic layer deposition (ALD). The staggered AgNWs form skeletons and intersperse in MXene sheets to build a doped layer with three-dimensional network structures, which improves the electrical conductivity of the film. Based on the optimal dispersion concentration of Ag in doped and single layers, the MXene/AgNW doped layer and AgNW single layer are alternately vacuumassisted-filtered to obtain laminated structures with multiple heterogeneous interfaces. These interfaces generate interface polarization and increase multiple reflection and scattering, resulting in the increased electromagnetic (EM) wave losses. On the other hand, MoS 2 outer nanolayers fabricated precisely by ALD effectively increases the absorption proportion of electromagnetic waves, reduces the secondary reflection, and improves the stability of EMI shielding properties. Ultimately, an ultrathin MAM film (a thickness of 0.03 mm) with five alternating internal layers and MoS 2 outer layers exhibits an excellent EMI SE of 86.3 dB in the X-band.

show abstract

Section: Introductionmentioning

confidence: 99%

Multilayer Ultrathin MXene@AgNW@MoS₂ Composite Film for High-Efficiency Electromagnetic Shielding

Xing

Wan

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…The main challenge in monitoring sliding electrical contacts is how to transmit the sensing signal outside the equipment, as the sliding electrical contact is enclosed by the metal shield of GIL/GIS [7]. Traditional wired signal transmission method requires drilling and laying cables, which can damage the airtight performance of GIL/GIS.…”

Section: Introductionmentioning

confidence: 99%

Acoustic carrier signal transmission technology and its potential for in‐site monitoring of sliding electrical contact used in gas‐insulated switchgear/gas‐insulated transmission line

Chen,

Zhang,

Zhao

et al. 2023

High Voltage

View full text Add to dashboard Cite

A wireless signal transmission technology based on acoustic carrier is proposed, which overcomes the limitation of electromagnetic signal shielding and shows great potential for in‐site monitoring of sliding electrical contact used in gas‐insulated switchgear (GIS)/gas‐insulated transmission line (GIL). Here, the state parameter of the sliding electrical contact is modulated onto the frequency domain of an ultrasound wave. As a mechanical wave, the ultrasonic wave is immune to electromagnetic shielding, so that it could carry the sensing signal to penetrate the metal shielding layer and transmit to the external terminals of GIS/GIL. The principle and signal modulation process of the acoustic carrier based transmission system have been demonstrated in detail. Both simulation and experiment have been conducted to analyse the system characteristics as well as optimise the system configuration. As a proof‐of‐concept application, the in situ and on‐line monitoring of the thermal rise of a slide electrical contact both in a current loading equivalent model and a prototype of GIS is demonstrated. Experimental results fit well with the physical process, and show a good measurement accuracy of 0.6% and temperature sensitivity of 400 Hz/°C.

show abstract

“…The eddy current losses of the end core and metal structures in a large water‐hydrogen‐hydrogen‐cooled turbine generator were calculated in [9], and the influence of the copper screen on eddy current loss of the clamping ring was studied in [10]. The eddy current losses of end structures in the SC were calculated in [11]. A new end structure was proposed in ref.…”

Section: Introductionmentioning

confidence: 99%

Calculation of magnetic field and eddy current loss in end clamping ring of 300MVA synchronous condenser based on a novel semi‐analytical method

Zhu

Liang

Han

et al. 2022

IET Electric Power Appl

View full text Add to dashboard Cite

It is very important to consider the eddy current reaction of the metal structure in large electric machines, which has a direct impact on the calculation results of induced current and loss. In order to solve the problem that the complex end leakage magnetic field is difficult to calculate directly, a new semi-analytical method (NSM) considering the eddy current reaction is proposed. Firstly, the corresponding relationship between the external magnetic field and the global magnetic field of the clamping ring in two simple calculation models is obtained by the 3-D finite element method. Then, the external magnetic field of the clamping ring in a 300MVA synchronous condenser under rated operating conditions is calculated, and the global magnetic field of the clamping ring is determined based on the obtained corresponding relationship. The eddy current density and eddy current loss of the clamping ring are calculated using the external magnetic field and the global magnetic field respectively. Finally, the calculation results were compared with the 3-D finite element results, which verified the importance of the global magnetic field and the accuracy of the NSM.

show abstract

Influence of Metal Shield Materials on Electromagnetic Field and Losses in End Region of Synchronous Condenser

Cited by 16 publications

References 20 publications

Multilayer Ultrathin MXene@AgNW@MoS₂ Composite Film for High-Efficiency Electromagnetic Shielding

Multilayer Ultrathin MXene@AgNW@MoS₂ Composite Film for High-Efficiency Electromagnetic Shielding

Acoustic carrier signal transmission technology and its potential for in‐site monitoring of sliding electrical contact used in gas‐insulated switchgear/gas‐insulated transmission line

Calculation of magnetic field and eddy current loss in end clamping ring of 300MVA synchronous condenser based on a novel semi‐analytical method

Contact Info

Product

Resources

About

Influence of Metal Shield Materials on Electromagnetic Field and Losses in End Region of Synchronous Condenser

Cited by 16 publications

References 20 publications

Multilayer Ultrathin MXene@AgNW@MoS2 Composite Film for High-Efficiency Electromagnetic Shielding

Multilayer Ultrathin MXene@AgNW@MoS2 Composite Film for High-Efficiency Electromagnetic Shielding

Acoustic carrier signal transmission technology and its potential for in‐site monitoring of sliding electrical contact used in gas‐insulated switchgear/gas‐insulated transmission line

Calculation of magnetic field and eddy current loss in end clamping ring of 300MVA synchronous condenser based on a novel semi‐analytical method

Contact Info

Product

Resources

About

Multilayer Ultrathin MXene@AgNW@MoS₂ Composite Film for High-Efficiency Electromagnetic Shielding

Multilayer Ultrathin MXene@AgNW@MoS₂ Composite Film for High-Efficiency Electromagnetic Shielding