title: A fully enclosed, compact standard lightning impulse generator for testing ultra-high-voltage-class gas-insulated switchgears with high capacitance.
abstract: At present, conducting standard lightning impulse (LI) tests in the field for gas-insulated switchgear (GIS) equipment is difficult because of the high capacitance of the test equipment and large circuit inductance of traditional impulse devices, which leads to a wavefront time T(f) ≥ 2.5 μs. A novel fully enclosed, compact standard LI generator for testing ultra-high-voltage-class GIS equipment with high capacitance is presented to solve the problem of T(f) exceeding the standard during LI voltage tests for actual large-sized equipment. The impulse generator is installed in a metal vessel filled with SF6 or SF6/N2 gas mixture at a pressure of 0.3-0.5 MPa, providing a more compact structure and a lower series inductance. A newly developed conical voltage sensor is used to accurately measure the output voltage waveform. Two test modes (via bushing docking and direct docking) for the GIS test based on the impulse generator are introduced. Calculation results show that the impulse generator can generate an LI test waveform following the present IEC standard for the test of equipment with capacitance >10,000 pF.
authors.affiliation: State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Wen
authors.affiliation: State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Qiaogen
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Lingli
authors.initials: L
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Junping
authors.initials: J
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Xuandong
authors.initials: X
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Xiaoang
authors.initials: X
authors.lastname: Li
authors.affiliation: State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Can
authors.initials: C
authors.lastname: Guo
authors.affiliation: State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Haoyang
authors.initials: H
authors.lastname: You
authors.affiliation: State Grid Corporation of China, 86 West Chang'an Street, Beijing 100031, China.
authors.forename: Weijiang
authors.initials: W
authors.lastname: Chen
authors.affiliation: China Electric Power Research Institute, Beijing 100192, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Yin
authors.affiliation: China Electric Power Research Institute, Beijing 100192, China.
authors.forename: Weidong
authors.initials: W
authors.lastname: Shi