TY - JOUR
T1 - A comprehensive analyses of aging characteristics of oil-paper insulation system in HVDC converter transformers
AU - Cui, Huize
AU - Yang, Liuqing
AU - Zhu, Yuanwei
AU - Li, Shengtao
AU - Abu-Siada, A.
AU - Islam, Syed
N1 - Publisher Copyright:
© 1994-2012 IEEE.
PY - 2020/10
Y1 - 2020/10
N2 - This paper investigates the dissolved gases evolution in transformer oil under combined DC/AC electrical-Thermal stress. Dissolved gases detected in transformer aged insulation oil reveal that oil under AC electric field combined with thermal stress can produce more dissolved gases than oil under DC electric field with thermal stress but less than the gases produced in oil under distorted AC or combined AC/DC voltage stress. This is attributed to the divergent migration properties of the charged components under different types of electric fields. To further understand this behavior, carrier recombination coefficient is proposed to explain the oil DGA results under various aging stresses. Results show that diagnostic parameters such as breakdown voltage, oil interfacial tension, and moisture content in pressboard should be used along with DGA results in order to accurately diagnose the insulation condition within converter transformers that impose a combined AC/DC voltage stress on the insulation system.
AB - This paper investigates the dissolved gases evolution in transformer oil under combined DC/AC electrical-Thermal stress. Dissolved gases detected in transformer aged insulation oil reveal that oil under AC electric field combined with thermal stress can produce more dissolved gases than oil under DC electric field with thermal stress but less than the gases produced in oil under distorted AC or combined AC/DC voltage stress. This is attributed to the divergent migration properties of the charged components under different types of electric fields. To further understand this behavior, carrier recombination coefficient is proposed to explain the oil DGA results under various aging stresses. Results show that diagnostic parameters such as breakdown voltage, oil interfacial tension, and moisture content in pressboard should be used along with DGA results in order to accurately diagnose the insulation condition within converter transformers that impose a combined AC/DC voltage stress on the insulation system.
KW - converter transformer
KW - dissolved gas analysis
KW - gas absorption theory
KW - oil-paper insulation system
UR - https://www.scopus.com/pages/publications/85092485293
U2 - 10.1109/TDEI.2020.008788
DO - 10.1109/TDEI.2020.008788
M3 - 文章
AN - SCOPUS:85092485293
SN - 1070-9878
VL - 27
SP - 1707
EP - 1714
JO - IEEE Transactions on Dielectrics and Electrical Insulation
JF - IEEE Transactions on Dielectrics and Electrical Insulation
IS - 5
M1 - 9215125
ER -