公开(公告)号：US10903651B2

公开(公告)日：2021-01-26

申请号：US16365877

申请日：2019-03-27

申请人： STATE GRID JIANGSU ELECTRIC POWER CO., LTD ,  STATE GRID JIANGSU ELECTRIC POWER CO., LTD. NANJING POWER SUPPLY BRANCH ,  CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED ,  HOHAI UNIVERSITY

发明人： Jijun Yin ,  Gang Chen ,  Xiao Lu ,  Yaohong Li ,  Qifeng Huang ,  Shufeng Lu ,  Bin Yang ,  Feng Ye ,  Haowei Zhang ,  Xiao Chen ,  Qiang Zhou ,  Mingfeng Xue ,  Lingying Huang ,  Shihai Yang ,  Qingshan Xu ,  Minrui Xu ,  Zhixin Li ,  Shuangshuang Zhao ,  Feng Wang ,  Wenguang Chen

IPC分类号： H02J3/14 ,  G06Q50/06 ,  H02P9/42 ,  H02P21/00

摘要： 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 Δω of rotation speed variation of a compressor by the virtual inertia control segment; obtaining a reference value ωref of rotational angular frequency of the compressor by the droop control segment; and inputting a sum of the reference value ωref of rotational angular frequency of the compressor and the reference value Δω of rotation speed variation of the compressor into a field-oriented controller (FOC) to control rotation of a motor.

公开(公告)号：US11768858B2

公开(公告)日：2023-09-26

申请号：US17355189

申请日：2021-06-23

申请人： Xi'an Jiaotong University ,  State Grid Jiangsu Electric Power Co. Ltd ,  Hohai University

发明人： Gengfeng Li ,  Yuxiong Huang ,  Liyin Zhang ,  Jiangfeng Jiang ,  Qirui Qiu ,  Shihai Yang ,  Xingying Chen ,  Xiaodong Cao ,  Kun Yu

IPC分类号： G06F16/28 ,  G06F1/28 ,  G06F17/16 ,  G06Q30/0204 ,  G06Q50/06

CPC分类号： G06F16/285 ,  G06F1/28 ,  G06F17/16 ,  G06Q30/0205 ,  G06Q50/06

摘要： 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×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.

公开(公告)号：US11422175B2

公开(公告)日：2022-08-23

申请号：US17081726

申请日：2020-10-27

申请人： STATE GRID JIANGSU ELECTRIC POWER CO., LTD. ,  STATE GRID JIANGSU ELECTRIC POWER CO., LTD. MARKETING CENTER

发明人： Qifeng Huang ,  Xiaoquan Lu ,  Shihai Yang ,  Mingming Chen ,  Zhixin Li ,  Bo Li ,  Huiling Su ,  Xiaodong Cao ,  Yuqin Chen ,  Hanmiao Cheng ,  Tianchang Liu ,  Yixuan Huang ,  Kaijie Fang

IPC分类号： G01R31/00 ,  G01R27/26 ,  G01R31/62

摘要： Provided is a live measurement method for three-winding transformer loss based on windowed frequency shift. The method includes: step 1: providing an improved live calculation equation of a three-winding transformer loss; step 2: processing a collected x(t) signal by windowed frequency shift calculation; step 3: solving an amplitude and a phase of the collected x(t) signal via discrete Fourier transform of a frequency shift signal; and step 4: calculating a no-load loss and a load loss of a three-winding transformer.

公开(公告)号：US11199863B2

公开(公告)日：2021-12-14

申请号：US16398806

申请日：2019-04-30

申请人： STATE GRID JIANGSU ELECTRIC POWER CO., LTD ,  STATE GRID CORPORATION OF CHINA ,  STATE GRID JIANGSU ELECTRIC POWER COMPANY RESEARCH INSTITUE ,  SOUTHEAST UNIVERSITY

发明人： Jijun Yin ,  Zuofeng Li ,  Gang Chen ,  Zhenyu Chen ,  Haifeng Li ,  Yefeng Jiang ,  Lin Liu ,  Qifeng Huang ,  Shufeng Lu ,  Bin Yang ,  Haowei Zhang ,  Xiao Chen ,  Qiang Zhou ,  Mingfeng Xue ,  Lingying Huang ,  Shihai Yang ,  Qingshan Xu ,  Minrui Xu ,  Zhixin Li ,  Shuangshuang Zhao ,  Feng Wang ,  Wenguang Chen

IPC分类号： G05F1/46 ,  G05B17/02 ,  G05D23/19 ,  G05F1/66 ,  G06F9/48 ,  G06F17/11

摘要： 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.