公开(公告)号：US10305284B2

公开(公告)日：2019-05-28

申请号：US15066228

申请日：2016-03-10

Applicant: LSIS CO., LTD.

Inventor： Eun Jae Lee

IPC: G01R21/133 ,  H02J3/36 ,  H02M5/40

Abstract: A data measurement device in a high voltage direct current (HVDC) system is provided. The data measurement device includes: a power measurement unit measuring pieces of power related data; and a control unit determining measurement times at which the pieces of power related data are measured respectively, and performing control based on pieces of power related data having a same measurement time among the pieces of power related data.

公开(公告)号：US09979194B2

公开(公告)日：2018-05-22

申请号：US15684808

申请日：2017-08-23

Applicant: LSIS CO., LTD.

Inventor： Eun Jae Lee

IPC: H02J3/18 ,  H02J3/20 ,  H02M1/42 ,  G05F1/70

CPC classification number: H02J3/1871 ,  G05F1/70 ,  H02J3/18 ,  H02J3/1814 ,  H02J3/1842 ,  H02J3/1892 ,  H02J3/20 ,  H02J15/00 ,  H02M1/4208

Abstract: A power compensation apparatus compensates for power of a power system to be allowed to transmit from at least one or more power sources to a load. The power compensation apparatus includes a first system connected to the power system to compensate for active power and reactive power of the power system, a second system connected to the first system to store power necessary for compensating for active power and reactive power, and a third system connected to the second system to generate the power to be stored in the second system.

公开(公告)号：US09733278B2

公开(公告)日：2017-08-15

申请号：US14683029

申请日：2015-04-09

Applicant: LSIS CO., LTD.

Inventor： Yong Kil Choi ,  Eun Jae Lee

IPC: G01R15/18 ,  H02J3/36 ,  H02J3/18 ,  G01R21/06 ,  G01R21/133 ,  G01R31/08

CPC classification number: G01R15/18 ,  G01R21/06 ,  G01R21/133 ,  G01R31/086 ,  H02J3/18 ,  H02J3/36 ,  Y02E40/30 ,  Y02E60/60

Abstract: A system for measuring a loss in power between a power transmission side and a power reception side in a high voltage direct current (HVDC) system is provided. The system for measuring the loss in power includes: a first loss measurement unit installed at the power transmission side, and a second loss measurement unit installed at the power reception side, wherein each of the first and second loss measurement units is installed at a location at which a current or voltage is measured, and includes a voltage sensor for measuring a voltage, a current sensor for measuring a current, a GPS module for providing time information on when measurement is performed by the voltage sensor and the current sensor, and a storage unit storing the time information along with a voltage value and a current value measured by the voltage sensor and the current sensor.