State Grid Corporation of China

State Grid Anhui Electric Power Research Institute

China Electric Power Research Institute

State Grid Smart Grid Research Institute Co., Ltd.

State Power Economic Research Institute

Jinzhong Li

Rui Liu

Yong Huang

Jiaqing Zhang

Yi Guo

Fengju Shang

Yubiao Huang

Dengfeng Cheng

Yu Tian

Wei Li

Liufang Wang

Jia Xie

Sha Luo

Yifu Zhou

Jin Zhang

Jie Yang

Yunpeng Li

Zhe Jiang

Hang Wang

Licheng Lu

Shan Liu

Jianhui Zhou

Shaowu Wang

Minghao Fan

Xianshan Guo

Zehong Liu

Xiaoning Wang

Ninghua Wang

Yanguo Ke

Jing Tan

Xiaodong Zhang

Pengcheng Yang

Shengli Song

Guangfan Li

Xiaocen Hu

Shuqi Zhang

Junyi Hou

Wen Su

Yuewen Qi

A high-voltage bushing includes a conductive rod and an air cooling device. The conductive rod has an air channel therein, and the air channel includes an air inlet and an air outlet. The air cooling device includes at least one fan, and the fan is configured to output air flow, so as to blow the air flow into the air channel through the air inlet.

High-voltage bushing and high-voltage power transmission system

Disclosed are a fire extinguishing system and method for an ultra-high voltage (UHV) converter station, and a UHV converter station. The fire extinguishing system includes a spray fire extinguishing system and a fire monitor-based fire extinguishing system, where the spray fire extinguishing system includes a first fire pipe and a spray pipe; the fire monitor-based fire extinguishing system includes a second fire pipe and a fire monitor; one fire monitor is disposed right above a firewall on both sides of each converter transformer in the UHV converter station, and each fire monitor is connected to one second fire pipe; a spray pipe is disposed on the firewall on both sides of each converter transformer; and the fire monitor corresponding to each converter transformer, and an outlet of the spray pipe connected to the first fire pipe corresponding to each converter transformer face the converter transformer.

Fire extinguishing system and method for ultra-high voltage (UHV) converter station, and UHV converter station

The present disclosure provides an air mixer for a compressed air foam (CAF) fire-extinguishing system. A foam concentrate and compressed air are respectively transported by a liquid inlet pipe and an air inlet pipe. When the compressed air and the foam concentrate enter a straight pipe through a first tapered pipe, they reach an outlet end of the first tapered pipe through a path narrowing due to different cross-section diameters at two ends of the first tapered pipe, and there is a compression process. Under an action of a high-pressure airflow, the foam concentrate is fully mixed. The mixed foam concentrate reaches a porous plate of the straight pipe and can be mixed secondarily. When the foam concentrate is discharged by a second tapered pipe, a flow path widens and there is a release process.

Air mixer for compressed air foam fire-extinguishing system and fire-extinguishing system

An operation control method suitable for a fire extinguishing system of an extra-high voltage converter station is provided. The method includes: after an upper computer control system receives a sound-light alarm signal, an alarm position signal, and a switch position dividing signal, starting a spray range prediction analysis subsystem for a fixed fire monitor; determining, by the spray range prediction analysis subsystem for the fixed fire monitor based on an external wind direction and an external wind speed, whether a range of a fire monitor effectively covers an entire area of a converter transformer; and if yes, automatically presetting a first fire monitor to which a first compressed air foam generation subsystem belongs and a second fire monitor to which a second compressed air foam generation subsystem belongs; or if no, replacing a fire monitor with a mobile fire-fighting robot to extinguish a fire.

Operation control method suitable for fire extinguishing system of extra-high voltage converter station

A partial discharge test power supply system for an extra high voltage transformer comprises: an electric motor (); an intermediate frequency generator () driven by the electric motor and outputting an intermediate frequency voltage; a middle transformer () receiving the intermediate frequency voltage and outputting a test voltage to be applied to a test sample () by a generator outlet (); a low-voltage compensating reactor () connected between the intermediate frequency generator and the middle transformer; a high-voltage compensating reactor () connected between the middle transformer and the sample; wherein the electric motor and the intermediate frequency generator are arranged in a metal housing (). The system also includes the following filters: a filter (a) arranged in the excitation circuit of the intermediate frequency generator, a filter (b) arranged between the high-voltage compensating reactor and the sample and a filter (c) arranged between the generator outlet and the low-voltage compensating reactor. The system provides a simple and reliable power source system with little background interference for the extra high voltage partial discharge tests.

Partial discharge experiment power supply system for extra-high voltage transformer and method thereof

Growing community of inventors

Beijing, China

Jinzhong Li