State Grid Jiangsu Electric Power Company

Chinese Academy of Sciences

Southeast University

State Grid Corporation of China

State Grid Jiangsu Electric Power Company Research Institute

Xi'an Jiaotong University

Hohai University

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

Shihai Yang

Qifeng Huang

Zhixin Li

Gang Chen

Qiang Zhou

Feng Wang

Bin Yang

Jijun Yin

Xiao Chen

Shuangshuang Zhao

Xiaodong Cao

Lingying Huang

Qingshan Xu

Minrui Xu

Shufeng Lu

Wenguang Chen

Haowei Zhang

Mingfeng Xue

Zhenyu Chen

Haifeng Li

Xiao Lu

Lin Liu

Bo Li

Yaohong Li

Mingming Chen

Kun Yu

Xingying Chen

Guomin Wang

Yefeng Jiang

Tianchang Liu

Yixuan Huang

Kaijie Fang

Yuxiong Huang

Gengfeng Li

Jiangfeng Jiang

Liyin Zhang

Zuofeng Li

Qirui Qiu

Feng Ye

Xiaoquan Lu

Huiling Su

Yuqin Chen

Hanmiao Cheng

A method of a power user classification based on distributed K-means, a storage medium and a classification device are provided. The method includes: obtaining, by N load aggregators, power consumption data of power users managed by respective load aggregators; performing, by each load aggregator, a normalization operation on time series load data of the power users managed by the load aggregator; forming a N&#xd7;N dimensional adjacency matrix A; performing K-means clustering on normalized time series load data, to obtain the respective centroids and user groups characterized by the respective centroids; sharing, by the respective load aggregators, the centroids and the number of users under the respective centroids based on the adjacency matrix A, and obtaining consistent centroids by multiple load aggregators; after an overall iteration ends, obtaining, by the respective load aggregators, the consistent centroids consistent with the K-means centroid based on global data, to realize user classification.

Method of power user classification based on distributed K-means, storage medium and classification device

Provided is a live measurement method for three-winding transformer loss based on windowed frequency shift. The method includes: stepproviding an improved live calculation equation of a three-winding transformer loss; stepprocessing a collected x(t) signal by windowed frequency shift calculation; stepsolving an amplitude and a phase of the collected x(t) signal via discrete Fourier transform of a frequency shift signal; and stepcalculating a no-load loss and a load loss of a three-winding transformer.

Live measurement method for three-winding transformer loss based on windowed frequency shift

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

A large-caliber telescope non-linear interference detecting and filtering method is provided. The measure of the oil pad interference is accomplished with one of the following two methods, accelerometer and encoder, or using both of the said methods simultaneously. The filtering of the oil pad interference: set a NOTCH frequency as the main interfering frequency by using NOTCH filter to filter the interference and distinctly improve the telescope performance. The telescope and method is specific to a large-caliber telescope with an oil pad, by using an acceleration sensor and an encoder to precisely measure the non-linear interfering frequency of the telescope oil pad system, by using a NOTCH digital filter to accurately filter the interference due to the oil pad system, and through adjusting parameters of the digital filter to change the filter frequency band on the basis of the change of the oil pad interfering frequency.

Large-caliber telescope non-linear interference detecting and filtering method

A control system for implementing nonlinear interference compensation for a torsion angle of an astronomical telescope is provided. The system includes a torsion angle detection system and a torsion angle compensation and amendment system. The torsion angle detection system is provided with a measurement mechanism for measuring the position of a driving wheel, and a position signal of the measurement mechanism is fed back to an industrial personal computer in the torsion angle compensation and amendment system in real time. An output signal of the industrial personal computer controls a compensation motor to rotate, and the compensation motor inclines an elastic plate with the driving wheel mounted thereon through a transmission mechanism, to further cause the torsion of the driving wheel by an angle and form compensation to the torsion angle.

Control system for implementing non-linear interference compensation for torsion angle of astronomical telescope

Growing community of inventors

Nanjing, China

Shihai Yang