Influence of insulating spacer type on propagation properties of PD-induced electromagnetic wave in GIS

Hikita, Masayuki; Ohtsuka, Shinya; Ueta, Genyo; Okabe, Shigemitsu; Hoshino, T.; Maruyama, S.

doi:10.1109/tdei.2010.5595569

Cited by 46 publications

(29 citation statements)

References 6 publications

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“…Experimental setup and procedure are same as before [1][2][3][4][5][6].Figure1 shows the configuration of the experimental setup. Three sensors of UHF-A, UHF-B, and UHF-C have been installed with insulating spacers of the metal flange type.…”

Section: A Experiments Methodsmentioning

confidence: 99%

“…Alternately, the transmission rate T w was also defined as the ratio of accumulated energy of EM wave signal detected by UHF-B or C to that by UHF-A. The accumulated energy of the EM wave is defined as the following equation, (1) where R is the impedance 50 Ω of the coaxial cable. Figure10 shows typical examples of simulated accumulated energy wave.…”

Section: A Experiments Methodsmentioning

confidence: 99%

“…In recent years, diagnosis of the electrical insulation of electric power apparatus such as gas-insulated switches (GIS) and transformers by UHF method for detecting partial discharges (PD) has been widely examined [1][2][3][4]. The UHF method allows detection of radiated electromagnetic (EM) waves in UHF band caused with partial PD.…”

Section: Introductionmentioning

confidence: 99%

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Effect of excitation current waveform on PD induced electromagnetic wave propagation and attenuation in straight 154 kV GIS model tank with epoxy spacers

Nishigouchi

Kozako

Hikita

et al. 2012

2012 IEEE International Conference on Condition Monitoring and Diagnosis

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This paper deals with effect of excitation current waveform on PD induced electromagnetic wave propagation and attenuation in straight 154 kV GIS model tank with epoxy spacers. An attempt was made to determine a standard wave shape of experimentally obtained EM wave for the simulated ones obtained by changing the rise time t r of the excitation waveform of Gaussian pulse from 25 ps to 200 ps with the propagation attenuation in GIS considered. This comparison was performed in terms of both transmission rate T v of peak to peak value V pp of EM wave intensity and transmission rate T w of accumulated energy of the EM wave. The simulation revealed that as t r is shortened, both T v and T w decrease. As a result, it was found that simulated excitation pulse with the rise time of 25-50 ps allows the best fit to experimentally obtained T v and T w when the calculation was made for a straight GIS structure with two epoxy spacers for a free metal particle on the tank. Furthermore, the rise time of 25-50 ps for T v and 100-150 ps for T w was found to give the best fit to the experimental results for a protrusion on the high voltage conductor.

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Section: A Experiments Methodsmentioning

confidence: 99%

Section: A Experiments Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of excitation current waveform on PD induced electromagnetic wave propagation and attenuation in straight 154 kV GIS model tank with epoxy spacers

Nishigouchi

Kozako

Hikita

et al. 2012

2012 IEEE International Conference on Condition Monitoring and Diagnosis

Self Cite

View full text Add to dashboard Cite

show abstract

“…Currently, different UHF antennas, which can be classified as external and built-in, are used for PD detection in transformers, gas-insulation switches (GIS), wind power devices, power cable and etc. [11][12][13][14][15][16][17][18][19][20]. However, the study on the UHF antenna for PD detection application in the high voltage switchgear is not enough, and those previous antennas either have narrow operating bandwidths or have low gain.…”

Section: Introductionmentioning

confidence: 99%

An Uwb Printed Antenna for Partial Discharge Uhf Detection in High Voltage Switchgears

Yang¹,

Peng²,

Yang³

et al. 2016

PIER C

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Abstract-As important fundamental equipment, high voltage switchgears are widely used in electric power systems and directly relative to the power reliability and quality. Partial discharge (PD) online monitoring is one of the most effective methods used for insulation testing and diagnosis in high voltage switchgears and power systems. This paper proposes a unique ultra-wide-band (UWB) antenna with high performance for PD ultra-high-frequency (UHF) detection in high voltage switchgears. Actual PD experiments were carried out, and the designed antenna was used for PD measurements. The measured results demonstrate that the proposed antenna has wide work frequency band, good omnidirectional radiation patterns and appreciable gain, which indicate that the proposed antenna is suitable for UHF online monitoring of PDs in high voltage switchgears.

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“…The advantage of this coupler is that it is easy to install and has been widely used in UHF system, while the low frequency measurement is not satisfactory. For the limitations of disc-type antenna, Japanese researchers designed some new kind of sensors, such as coaxial-to-waveguide antenna which allows probe to be placed in a rectangular waveguide with curve edges [5], the modified dipole antenna to improve the sensitivity [6] and so on. Toshihiro Hoshino has simulated the PD signal receiving process by PD sensor in GIS using Finite Difference Time Domain (FDTD) method [7].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on UHF partial discharge sensor in GIS

Li¹,

Rong

Wang

2015

2015 3rd International Conference on Electric Power Equipment – Switching Technology (ICEPE-ST)

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Detecting the partial discharge (PD) phenomenon in gas insulated switchgear (GIS) by using ultra-high-frequency (UHF) method is an effective diagnosis method to avoid insulation accidents. The most crucial part of UHF detecting system is ultra high frequency sensor. So a partial discharge (PD) sensor based on two-arm equiangular spiral antenna is designed and optimized in previous work. To examine the performance of the designed sensor when receiving the actual PD signal, several experiment test is performed in this research. The experimental setup including a PD model is built at the beginning. Then, the comparative test of the sensors with different impedance transformer (IT) is made, which indicates that the one with optimized IT has lower amplitude signal. And the tests by using different PD defects are also executed. It shows that the signal of the sensors can reflect the existence of PD as well as the feature of each kind of defect. In order to examine the change of the received signal when the distance varies, the experimental test are performed in the condition of the distance increasing in two directions respectively, which confirm that the change of the sensor position does not have obvious influence to the received signal. This paper further verified that the designed UHF sensor can effectively receive the PD signal and has good receiving performance to be used in PD detection.

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Influence of insulating spacer type on propagation properties of PD-induced electromagnetic wave in GIS

Cited by 46 publications

References 6 publications

Effect of excitation current waveform on PD induced electromagnetic wave propagation and attenuation in straight 154 kV GIS model tank with epoxy spacers

Effect of excitation current waveform on PD induced electromagnetic wave propagation and attenuation in straight 154 kV GIS model tank with epoxy spacers

An Uwb Printed Antenna for Partial Discharge Uhf Detection in High Voltage Switchgears

Experimental investigation on UHF partial discharge sensor in GIS

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