An evaluation method of observable charge trap depth for the PEA method and its complementarity with the Q(t) method

• Autorzy: Ren Hanwen , Takada Tatsuo , Tanaka Yasuhiro , Li Qingmin

Identyfikatory

DOI

10.24425/mms.2021.137136

• Języki publikacji: EN

Abstrakty

EN

This paper proposes an evaluation method for the observable trap depth range of space charge when using the pulsed electro-acoustic (PEA) method and its complementarity with the current integration charge (Q(t)) method. Based on the measurement process of the PEA method and the hopping conduction principle of space charge, the relationship between the trap depth and the residence time of charge is analysed. A method to analyse the effect of the measurement speed and the spatial resolution of the PEA system on the observable trap depth is then proposed. Further results show when the single measurement time needs 1 s and the resolution is 10 μm at room temperature, the corresponding trap depth is larger than 0.68 eV. Meanwhile, under high temperature or with voltage applied, the depth can further increase. The combined measurement results of the PEA and Q(t) methods indicate that the former focuses on charge distribution in deep traps, which allows to calculate the distorted electric field. The latter can measure the changing process of the total charge involved in all traps, which is applicable to analysing the leakage current. Therefore, the evaluation of HVDC insulation properties based on the joint application of the two methods is more reliable.

Słowa kluczowe

EN

pulsed electroacoustic method; trap depth; current integration charge method; leakage current

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2021
• Tom: Vol. 28, nr 3
• Strony: 565--580
• Opis fizyczny: Bibliogr. 29 poz., rys., wykr., wzory

Twórcy

autor

Ren Hanwen

• North China Electric Power University, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing 102206, China

autor

Takada Tatsuo

• Tokyo City University, 1-28-1 Tamazutsumi, Setagaya, Tokyo, 158-8557, Japan

autor

Tanaka Yasuhiro

• Tokyo City University, 1-28-1 Tamazutsumi, Setagaya, Tokyo, 158-8557, Japan

autor

Li Qingmin

• North China Electric Power University, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing 102206, China

Bibliografia

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Uwagi

1.This project was supported by the Beijing Natural Science Foundation (3202031) and the National Natural Science Foundation of China (Grant No. 51929701, 51737005, 52081330507).

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).