State Grid Jiangsu Electric Power Co., Ltd. Marketing Service Center

State Grid Corporation of China

State Grid Jiangsu Electric Power Company

National Institute of Metrology, China

State Grid Jiangsu Electric Power Co., Ltd. Marketing Center

Qing Xu

Xiao Chen

Shuangshuang Zhao

Guofang Xia

Zhengqi Tian

Meimei Duan

Qifeng Huang

Zhixin Li

Mingming Chen

Xiaodong Cao

Chao Zhou

Ying Song

Siyun Wang

Yongxian Yi

Zhongdong Wang

Xianlin Pan

Tiandi Zhou

Zhaomin Shi

Xiaoxing Mu

Dan Gong

Zengkai Ouyang

Provided are a heat shield and a Josephson junction array chip system, the heat shield includes a cryostat, a sensor group, a radiation shield plate, a clamp assembly, and a vacuum shield cover assembly; the cryostat includes a cold head, a first-stage chassis, and a second-stage chassis; the vacuum shield cover assembly includes a first vacuum shield cover, a second vacuum shield cover, and a heat shield aluminum oxide layer; and the cold head is located in the first vacuum shield cover; and the heat shield aluminum oxide layer is coated on a surface of at least one of the first vacuum shield cover or the second vacuum shield cover; the clamp assembly on the radiation shield plate is configured to fix the Josephson junction array chip; and the sensor group adjacent to the Josephson junction array chip is arranged on the radiation shield plate.

Heat shield and Josephson junction array chip system

The present disclosure provides a system and method for verifying alternating current (AC)/direct current (DC) conversion of an ultralow-frequency voltage. The system includes a quantum voltage generation system, a low-frequency signal source, a follower, three switches, a double-heater-strip thermoelectric converter, a nanovoltmeter, a clock source, a high-precision digital sampling system, and an upper computer. Based on DC and AC quantum voltage technologies and with reference to the double-heater-strip thermoelectric converter, an ultralow-frequency voltage is traced to a DC quantum voltage through AC/DC conversion, and a conversion result is compared with an AC quantum voltage to verify rationality of precision and an uncertainty evaluation result of AC/DC conversion of the ultralow-frequency voltage, so as to ensure reliability of AC/DC conversion of the ultralow-frequency voltage. This resolves a problem that the AC/DC conversion result of the ultralow-frequency voltage cannot be verified.

System and method for verifying alternating current (AC)/direct current (DC) conversion of ultralow-frequency voltage based on quantum technology

A quasi-real-time data collection system for a competitive power market includes a distributed data collection unit, a centralized data collection unit, and a main collection station, where the distributed data collection unit is connected to an intelligent watt-hour meter by using an internal downlink communication module of the distributed data collection unit, and configures data item collection parameters and task execution parameters by using an internal collection task and scheme configuration module of the distributed data collection unit; the centralized data collection unit is connected to the main collection station by using an internal file conversion and uplink communication module of the centralized data collection unit; and the centralized data collection unit is connected to multiple distributed data collection units by using a local high speed power line carrier communication (HPLC) network.

Quasi-real-time data collection system and method for competitive power market

Growing community of inventors

Jiangsu, China

Qing Xu