State Grid Corporation of China

State Grid Anhui Electric Power Research Institute

State Grid Hubei Electric Power Research Institute

Wuhan Ruixin Special Optical Fiber Co., Ltd.

State Power Economic Research Institute

Rui Liu

Yi Guo

Jiaqing Zhang

Yubiao Huang

Fengju Shang

Liufang Wang

Dengfeng Cheng

Jia Xie

Wei Li

Yu Tian

Sha Luo

Yifu Zhou

Wei Wang

Yu Zhang

Hong Zhang

Ling Ruan

Wei Luo

Tao Sun

Minghao Fan

You Li

Yanguo Ke

Shengli Song

Pengcheng Yang

Yalong Tu

Fei Lu

Lei Jin

Kai Zhou

Wenpei Li

Kanxian Wei

Xiaodong Zhang

Xiaotao Hu

Xin Liu

Tao Xie

Yang He

Jianhua Bao

Tiantian Tan

Jian Sun

Shuping Wang

Taiyun Zhu

Jing Tan

Yunli Li

Yong Huang

Wen Su

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 a degassing membrane tube module and an online gas-in-oil monitoring apparatus for a vacuum on-load tap changer (OLTC). The online gas-in-oil monitoring apparatus includes an online monitoring housing, an oil inlet tube, a gas monitoring device, an oil tank, and an oil diffusing screen, where one end of the oil inlet tube extends through an inner wall at one side of the online monitoring housing; the gas monitoring device is located on a top inner wall of the online monitoring housing; and a front end of the oil inlet tube is provided with the degassing membrane tube module for online preliminary degassing on insulating oil. With the degassing membrane tube module, the online gas-in-oil monitoring apparatus can increase removal rates for gases in the insulating oil within a short time, and can perform degassing on various gases in the insulating oil.

Degassing membrane tube module and online gas-in-oil monitoring apparatus for vacuum on-load tap changer (OLTC)

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

A robot applicable to synchronous patrol of a long branch pipeline and a main pipeline includes a walking apparatus and detection apparatuses located on a top of the walking apparatus, where the detection apparatuses accompany the walking apparatus to patrol the main pipeline. The robot further includes a sub-walking apparatus located at a front end of the walking apparatus, where front wheel obstacle-crossing apparatuses of the walking apparatus are also capable of limiting the sub-walking apparatus while crossing an obstacle in the main pipeline, and when the branch pipeline is encountered, the front wheel obstacle-crossing apparatuses are lifted to a certain height, a bin outlet of the sub-walking apparatus is released, and the sub-walking apparatus is separated from the walking apparatus and independently patrols the branch pipeline.

Robot and patrol method applicable to synchronous patrol of long branch pipeline and main pipeline

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

Provided are an insulation diagnosis and defect positioning method, apparatus and device for an insulated bus pipe, and a storage medium. The method includes: applying a test voltage between a ground electrode and a conductor portion of the insulated bus pipe; identifying multiple grounded segments of the insulated bus pipe according to a ground shielded short wiring and a line ground wiring, measuring a length of each grounded segment and a ground current of each grounded segment at the test voltage, and calculating a ground current per unit length of each grounded segment; comparing ground currents per unit length of different grounded segments; measuring a capacitance current value of each grounded segment according to a quantity, a length and a number of intermediate couplings included in each grounded segment; comparing the ground current and the capacitance current value of each grounded segment; according to the comparison results, diagnosing an insulation status and implementing defect positioning of the insulated bus pipe.

Insulation diagnosis and positioning method for insulated bus pipe

The present invention discloses an elliptical cladding polarization-maintaining large-mode-area gain fiber, structurally comprising a core of the elliptical cladding polarization-maintaining large-mode-area gain fiber, an inner cladding, an elliptical stress layer, a first outer cladding, a second outer cladding and a third outer cladding, wherein the inner cladding surrounds the core; the elliptical stress layer surrounds the inner cladding, and has an elliptical cross-sectional shape; the first outer cladding surrounds the elliptical stress layer; the second outer cladding surrounds the first outer cladding; and the third outer cladding surrounds the second outer cladding. As the birefringence of the elliptical cladding polarization-maintaining fiber is directly proportional to the ellipticity and the deposition of a stress-applying area occurs during the preform rod forming process, procedures of preform drilling and the like are eliminated, and the likelihood of preform contamination is greatly reduced. The optical loss and strength of the fiber can hence be improved, and the entire manufacturing process is simplified. Furthermore, the birefringence and the pump absorption of the fiber can also be improved.

Elliptical cladding polarization-maintaining large-mode-area gain fiber

Growing community of inventors

Anhui, China

Rui Liu