ClassID:

171519

G01R21/003 - CPC Classification

Classification description:

Arrangements for measuring electric power or power factor; Measuring real or reactive component; Measuring apparent energy Measuring reactive component

Recent Application in this class:
#1
20250271475
2025-08-28

METHOD FOR DETECTING WHETHER THERE IS ISLANDING AND POWER CONDITIONING SYSTEM USING SAME

#2
20250076364
2025-03-06

FAULT LOCATION SYSTEM USING VOLTAGE OR CURRENT MEASUREMENT FROM DIVERSE LOCATIONS ON A DISTRIBUTION NETWORK

#3
20230296654
2023-09-21

NON-INTRUSIVE LOAD MONITORING METHOD BASED ON V-I TRAJECTORY AND NEURAL NETWORK

#4
20220308104
2022-09-29

Fault location system using voltage or current measurement from diverse locations on a distribution network

#5
20210048458
2021-02-18

Electrical energy meter comprising a current-measuring circuit and a voltage-measuring circuit

#6
20200309841
2020-10-01

Fault location system using voltage or current measurement from diverse locations on a distribution network

#7
20200209291
2020-07-02

System and method for performing a line-wise power flow analysis for a power system

#8
20200144820
2020-05-07

Reactive power control equipment and reactive power control method

#9
20200081044
2020-03-12

POWER FLOW CALCULATION METHOD AND DEVICE FOR AC-DC INTERCONNECTED POWER SYSTEM, STORAGE MEDIUM AND TERMINAL

#10
20200028361
2020-01-23

POWER SWITCHING DEVICE FOR AN ELECTRICAL POWER DISTRIBUTION SYSTEM, IN PARTICULAR FOR AN AIRCRAFT, WITH METERING OF THE CONSUMED ELECTRICAL POWER

#11
20190273390
2019-09-05

Power blackout sensing system with a phantom voltage detector including a coupled inductor device

#12
20190245351
2019-08-08

Device and method for extinction angle control of HVDC system

#13
20190129459
2019-05-02

Residential static VAR compensator apparatus and method

#14
20190097426
2019-03-28

Device and method for testing power modules

#15
20190081551
2019-03-14

Overload current limiting method for voltage source converter

#16
20190067942
2019-02-28

Technique for evaluating an output performance of an electric power output apparatus connected to an electric power distribution network

#17
20180241211
2018-08-23

MULTIFUNCTIONAL POWER CORRECTION DEVICE

#18
20180152020
2018-05-31

Power system voltage reactive power monitoring control device and method

#19
20180003747
2018-01-04

Device of monitoring reactive power compensation system, and method thereof

#20
20170350924
2017-12-07

DEVICE FOR MEASURING LOSS IN REACTIVE POWER COMPENSATION SYSTEM

#21
20170343591
2017-11-30

METHOD AND SYSTEM FOR MEASURING IMBALANCES IN AN ELECTRICAL GRID

#22
20170315520
2017-11-02

Fault isolation and service restoration in an electric grid

#23
20170054362
2017-02-23

Static VAR compensator apparatus and operating method thereof

#24
20170040887
2017-02-09

DC/AC converter apparatus comprising means for controlling the reactive power and power conversion and generation system comprising such DC/AC converter apparatus

#25
20160349299
2016-12-01

Detecting device and detecting method for detecting output impedance angle of inverter

#26
20160349296
2016-12-01

Power system analysis support system, analysis support apparatus for power system, analysis support method for power system, and measuring device for power system

#27
20160282391
2016-09-29

System and method for ripple-free AC power determination

#28
20160164294
2016-06-09

Systems and methods for reactive power compensation

#29
20160161538
2016-06-09

Method for testing dynamic model parameters of wind power plant

#30
20160043635
2016-02-11

Algorithm for passive power factor compensation method with differential capacitor change and reduced line transient noise

#31
20150226775
2015-08-13

SYSTEM, METHOD AND APPARATUS FOR COMPUTING, MONITORING, MEASURING, OPTIMIZING AND ALLOCATING POWER AND ENERGY FOR A ROD PUMPING SYSTEM

#32
20150168465
2015-06-18

METHOD AND APPARATUS FOR ELECTRIC POWER SYSTEM DISTRIBUTION STATE ESTIMATIONS

#33
20150091492
2015-04-02

System, method and apparatus for computing, monitoring, measuring, optimizing and allocating power and energy for a rod pumping system

#34
20150039148
2015-02-05

Fault isolation and service restoration in an electric grid

#35
20140347020
2014-11-27

Method and arrangement for feeding electrical power from a wind energy installation into an AC voltage system

#36
20130063273
2013-03-14

Fault isolation and service restoration in an electric grid

#37
20130046663
2013-02-21

Apparatus and method for measuring active/reactive powers

#38
20100088049
2010-04-08

Apparatus and method for measuring active and reactive powers

#39
20100085037
2010-04-08

System and method for measuring reactive power

#40
18631881
2025-10-14

System and method for creation and operation of a microgrid from a preexisting electric grid

#41
18158194
2023-10-03

Smart meter method and smart meter system with error detection

#42
17835635
2023-02-07

Method and system to detect non-technical losses in an electrical power system