Apparatus and method of measuring data in high voltage direct current system

Patent metadata

Field	Value
Publication number	US-10305284-B2
Application number	US-201615066228-A
Country	US
Kind code	B2
Filing date	Mar 10, 2016
Priority date	Aug 27, 2015
Publication date	May 28, 2019
Grant date	May 28, 2019

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.

First claim

What is claimed is:

1. A data measurement device in a high voltage direct current (HVDC) system, the data measurement device comprising:
a power measurement unit configured to measure pieces of power related data;
a signal transmission and conversion unit configured to convert the pieces of power related data into control operation data for performing a control of an operation of the HVDC system, and transmit the control operation data to a control unit; and
the control unit configured to determine measurement times at which the pieces of power related data are measured respectively, and to perform a control based on pieces of power related data having a same measurement time among the pieces of power related data,
wherein the control unit is further configured to:
obtain an actual measurement time when a measured measurement time is tagged to each of the pieces of power related data;
predict a predicted measurement time based on an acquisition time of a passive sensor by subtracting a previously measured time consumed for signal transmission and conversion of the pieces of power related data from a time at which conversion into the control operation data is completed, when the measured measurement time is not tagged to each of the pieces of power related data; and
assign, as the measurement time, the actual measurement time when a measured measurement time is tagged or the predicted measurement time when the measured measurement time is not tagged.

2. The data measurement device according to claim 1 , wherein the control performed by the control unit comprises at least one of operation control of a switching device comprising a circuit breaker, power control increasing or decreasing an amount of transmission power, and voltage control controlling DC and AC voltages.

3. The data measurement device according to claim 1 , wherein the control unit controls the power measurement unit to enable information on the measurement time to be tagged to each of the pieces of power related data.

4. The data measurement device according to claim 1 , further comprising a memory unit that stores the pieces of power related data in association with the measurement time.

5. The data measurement device according to claim 1 , wherein the pieces of power related data comprises at least one of measurement values for an alternating current (AC) current, an AC voltage, a DC current, a DC voltage, a circuit breaker state, and a TAP position.

6. The data measurement device according to claim 1 , wherein the power measurement unit comprises:
an AC measurement unit measuring AC power that comprises an AC current and an AC voltage; and
a DC measurement unit measuring DC power that comprises a DC current and a DC voltage.

7. The data measurement device according to claim 1 , wherein the power measurement unit comprises a global positioning system (GPS) signal reception unit that receives a GPS signal, and determines the measurement time based on the GPS signal received by the GPS signal reception unit.

8. A data measurement method in a high voltage direct current (HVDC) system, the data measurement method comprising:
measuring pieces of power related data;
converting the pieces of power related data into control operation data for performing a control of an operation of the HVDC system;
transmitting the control operation data to a control unit;
determining measurement times at which the pieces of power related data are measured respectively;
obtaining an actual measurement time when a measured measurement time is tagged to each of the pieces of power related data,
predicting a predicted measurement time based on an acquisition time of a passive sensor by subtracting a previously measured time consumed for signal transmission and conversion of the pieces of power related data from a time at which conversion into the control operation data is completed, when the measured measurement time is not tagged to each of the pieces of power related data;
assigning, as the measurement time, the actual measurement time when a measured measurement time is tagged or the predicted measurement time when the measured measurement time is not tagged; and
performing control based on pieces of power related data having a same measurement time among the pieces of power related data.

9. The data measurement method according to claim 8 , wherein the control comprises at least one of operation control of a switching device comprising a circuit breaker, power control increasing or decreasing an amount of transmission power, and voltage control controlling DC and AC voltages.

10. The data measurement method according to claim 8 , wherein information on the measurement time is tagged to each of the pieces of power related data.

Assignees

• Lsis Co Ltd

Inventors

• Lee Eun Jae

Classifications

• Y02E60/60

  Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD] · CPC title

• G01R31/00 Primary

  Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere ({measuring superconductive properties G01R33/1238;} testing line transmission systems H04B3/46; testing or measuring semiconductors or solid state devices during manufacture {H10P74/00}) · CPC title

• H02J3/36 Primary

  Arrangements for transfer of electric power between AC networks via high-voltage DC [HVDC] links; Arrangements for transfer of electric power between generators and networks via HVDC links · CPC title

• H02M5/40

  with intermediate conversion into DC · CPC title

• G01R21/1333

  adapted for special tariff measuring · CPC title