State Grid Corporation of China

State Grid Jiangsu Electric Power Company

Southeast University

State Grid Jiangsu Electric Power Company Research Institute

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

National Institute of Metrology, China

Shuangshuang Zhao

Xiao Chen

Gang Chen

Qiang Zhou

Feng Wang

Bin Yang

Jijun Yin

Shihai Yang

Qifeng Huang

Zhixin Li

Qing Xu

Lingying Huang

Qingshan Xu

Meimei Duan

Minrui Xu

Shufeng Lu

Wenguang Chen

Haowei Zhang

Zhengqi Tian

Mingfeng Xue

Zhenyu Chen

Haifeng Li

Xiao Lu

Lin Liu

Xiaodong Cao

Yaohong Li

Ying Song

Chao Zhou

Guofang Xia

Yefeng Jiang

Xiaoxing Mu

Zhaomin Shi

Tiandi Zhou

Xianlin Pan

Zuofeng Li

Feng Ye

Zengkai Ouyang

Dan Gong

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

Provided is a user side load response method based on adjustment and control on temperature of load clusters. The user side load response method includes: performing thermodynamic modeling on a temperature control load to obtain a temperature control model in direct load control; constructing a mapping quantity to describe the change state of a temperature control load relay switch; obtaining adjustable capacity of the temperature control load through the mapping quantity; introducing temperature control load clusters to solve the problem that control precision cannot satisfy condition requirements; and finally calculating the influence of each load cluster in different load cluster control schemes on comfort degree.

User side load response method based on adjustment and control on temperature of load clusters

Provided is a power grid adjustment method based on a load of a variable frequency air conditioner. The method includes: establishing a mathematical simulation model of a virtual synchronous motor in a variable frequency air conditioner controller; establishing a virtual inertia control segment and a droop control segment of power grid adjustment according to the mathematical simulation model; obtaining a reference value &#x394;&#x3c9; of rotation speed variation of a compressor by the virtual inertia control segment; obtaining a reference value &#x3c9;of rotational angular frequency of the compressor by the droop control segment; and inputting a sum of the reference value &#x3c9;of rotational angular frequency of the compressor and the reference value &#x394;&#x3c9; of rotation speed variation of the compressor into a field-oriented controller (FOC) to control rotation of a motor.

Power grid adjustment method based on loads of variable frequency air conditioner

Growing community of inventors

Jiangsu, China

Shuangshuang Zhao