State Grid Jiangsu Electric Power Company

Jiangsu Electric Power Research Institute Co., Ltd.

State Grid Jiangsu Electric Power Co., Ltd. Research Institute

Chinese Academy of Sciences

State Grid Corporation of China

State Grid Jiangsu Electric Power Research Institute

Qiang Huang

Jinggang Yang

Rong Sun

Jianjun Liu

Hong Tao Liu

Zhen Wang

Yang Xu

Wei Zhang

Yongling Lu

Chengbo Hu

Jun Jia

Fengbo Tao

Ziquan Liu

Xueqiong Zhu

Jianhua Qin

Guojiang Zhang

Tianxin Zhuang

Yujie Li

Hanyan Xiao

Jie Chen

Yongfei Liu

Jingying Cao

Xiao Tan

Chenying Li

Lingling Xu

Libin Hu

Min Zheng

Zihuan Shao

Zhaohui Zhang

Chao Yun

Dayong Tai

Chong Tan

Shan Gao

Hongtao Li

Shaobo Chen

Jingtan Ma

Ke Zhao

A device for simulating high-frequency current propagation of partial discharge of a GIL/GIS is disclosed. The device comprises a casing, a busbar cavity, an adjustable impedor, a first metal support, a second metal support, a third metal support, and a high-frequency current sensor. The first metal support and the second metal support are separated by an insulating support, the third metal support has an end connected to the second metal support, as well as an end connected to a grounding grid, and the adjustable impedor is formed by an adjustable resistor and an adjustable inductor which are connected in series, and is connected in series between the first metal support and the second metal support through a wire. In the application, the adjustable impedor is connected in series to the metal supports at the grounding point to obtain an impedance equivalent to that of a long-distance GIL/GIS housing.

Device for simulating high-frequency current propagation of partial discharge of GIL/GIS

Base for a measurement device

Disclosed are a device and method for detecting defects of a high-voltage cable cross-bonded grounding system. The method selects a protective grounding box of a cross-bonded grounding system, respectively connects a signal excitation coupler to A-phase, B-phase and C-phase coaxial cables of the protective grounding box, selects a stable signal with a frequency different from a power frequency or a field interference frequency, and tests effective current values and phases responded by the A-phase, B-phase and C-phase coaxial cables when the stable signal with the frequency F1 is injected into the A-phase, B-phase and C-phase coaxial cables of the protective grounding box; and obtains resistances and inductances of branch circuits of the cable cross-bonded grounding system by calculation according to measurement data, and determines if the cable cross-bonded grounding system has a connection defect.

Device and method for detecting defects of high-voltage cable cross-bonded grounding system

A micro-power wireless access method and apparatus for the Internet of things for power transmission and transformation equipment involves a time synchronization process, a traffic channel access process, a control channel configuration information access process, and a control channel burst information access process. In the time synchronization process, an aggregation node determines a delay parameter and other parameters based on a timeslot in which traffic information randomly transmitted by a sensing terminal is located, and the sensing terminal adjusts transmission time of a corresponding frame based on the parameters. The traffic channel access process adopts a mode in which one-way reporting is mainly used, to minimize working time of a sensor. The present disclosure realizes limited two-way communication on a control channel, supports configuration of a sensor cycle, a threshold, and other parameters, and supports a retransmission mechanism on the control channel for important alarm information.

Micro-power wireless access method and apparatus for internet of things for power transmission and transformation equipment

Growing community of inventors

Jiangsu, China

Qiang Huang