Guangdong Power Grid Co., Ltd.

Electric Power Research Institute of Guangdong Power Grid Co., Ltd.

China Electric Power Research Institute of Guangdong Power Grid Co., Ltd.

Wenfeng Cheng

Li Li

Bing Zhao

Lianhong Zhong

Meng Song

Yunsong Luo

Zhengjun Shi

Yajun Xia

Xinhui Duan

Youxin Lin

Chao Sheng

Xiaoqing Xiao

Tao Ma

Lei Hu

Teng Zhang

Yongfa Zhao

Nannan Hu

Shaotao Dai

Bangzhu Wang

Provided is a superconducting coil having a spiral structure for a current limiter. The coil includes: a first superconducting tape, a second superconducting tape, and an insulating isolation layer, where the first superconducting tape and the second superconducting tape have spiral structures, an end of the first superconducting tape at a spiral center is connected to an end of the second superconducting tape at the spiral center, the instating isolation laser is filled between the first superconducting tape and the second superconducting tape, and a spacing between the first superconducting tape and the second superconducting tape gradually increases from the spiral center to an outer spiral periphery.

Superconducting coil having spiral structure for current limiter

Provided is a superconducting tape testing device, including lead contacts and a support plate. Each lead contact a conductive contact and a magnet; the magnet is provided with a through hole through which the conductive contact passes, the support plate comprises a plate and a magnetic conductive member; and the magnetic conductive member is fixed on the surface of the plate body.

Superconducting tape testing device

Provided is a superconducting fault current limiter having a composite insulating structure. The superconducting fault current limiter includes: a superconducting current limiting unit, an inner composite insulating cylinder, an outer composite insulating cylinder and a low-temperature container. The outer composite insulating cylinder is sleeved inside the low-temperature container; the inner composite insulating cylinder is sleeved inside the outer composite insulating cylinder; the superconducting current limiting unit is sleeved inside the inner composite insulating cylinder. The superconducting current limiting unit and the inner composite insulating cylinder are securely connected through a first support, and the low-temperature container and the outer composite insulating cylinder are securely connected through a second support.

Superconducting current limiter having composite insulation structure

Provided are a method and apparatus for calculating fault resistance and a current-limiting current of a superconducting fault current limiter. The method includes: calculating a first short-circuit fault current I(t) of a power grid short-circuit fault transient circuit; calling an external characteristic model U(I,t), and calculating resistance R(t) of a superconducting fault current limiter under the first short-circuit fault current I(t); adding the resistance R(t) of the superconducting fault current limiter into the power grid short-circuit fault transient circuit, and calculating a second short-circuit fault current I(t), where m=n+1; and determining whether an error between the second short-circuit fault current I(t) and the first short-circuit fault current I(t) is smaller than a preset threshold value, if yes, determining the fault resistance and the current-limiting current of the superconducting fault current limiter to be R(t) and I(t) respectively; otherwise, I(t)=I(t), returning for iteration.

Annular bearer network and service bearing implementation method therefor

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Guangdong, China

Wenfeng Cheng