Predicting high-voltage direct current transmission in a wind turbine system

Patent metadata

Field	Value
Publication number	US-10186874-B2
Application number	US-201514703529-A
Country	US
Kind code	B2
Filing date	May 4, 2015
Priority date	May 13, 2014
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

The present disclosure relates to a high-voltage direct current (HVDC) transmission system, and particularly, to an HVDC transmission system control device associated with a power generation energy system. An HVDC transmission system control device according to an embodiment includes a wind power generation amount predicting unit configured to receive energy generated by a wind power generation device for a predetermined time, and predict a wind power generation amount on the basis of the received energy, a possible power generation amount predicting unit configured to determine an amount of energy generated by the wind power generation device and a transmission capacity corresponding to the amount of energy, on the basis of the predicted wind power generation amount, and a control unit configured to output energy to a power transformation device on the basis of the amount of energy and the transmission capacity predicted by the possible power generation amount predicting unit.

First claim

What is claimed is:

1. A high-voltage direct current (HVDC) transmission system control device comprising:
a first predicting unit configured to receive energy generated by a wind power generation device for a predetermined time and predict an amount of generated wind power based on the received energy;
a second predicting unit configured to determine an amount of energy generated by the wind power generation device and a transmission capacity corresponding to the determined amount of energy based on the predicted amount of generated wind power;
a determining unit configured to determine an amount of energy charged and discharged by a storage device based on the determined amount of energy and the corresponding transmission capacity; and
a control unit configured to output energy to a power device based on the determined amount of energy and the corresponding transmission capacity,
wherein the determining unit is further configured to determine the amount of energy charged and discharged based on a possible power generation amount such that the corresponding transmission capacity is constant for a predetermined time or varies for each of a plurality of time points and to determine a capacity for transmitting power for a predetermined time according to the determined amount of energy charged and discharged,
wherein the power device is configured to receive energy output by the storage device and output a DC voltage and current corresponding to an amount of energy output by the storage device, and
wherein the control unit is further configured to:
measure the DC voltage and current output by the power device;
determine whether the measured DC voltage and current are within reference voltage and current ranges in order to determine whether the power device operates normally; and
determine whether the power device operates normally based on the measured DC voltage and current output.

2. The HVDC transmission system control device according to claim 1 , wherein the first predicting unit is further configured to measure AC voltage and current from a transmission-side AC part.

3. The HVDC transmission system control device according to claim 2 , wherein the first predicting unit is further configured to predict the amount of generated wind power based on the measured AC voltage and current.

Assignees

• Lsis Co Ltd

Inventors

• Choi Yong Kil
• Choi Ho Seok

Classifications

• H02J2103/30

  Simulating, planning, modelling, reliability check or computer assisted design [CAD] of electric power networks · CPC title

• H02J2101/28

  Wind energy · CPC title

• Y02E60/60

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

• H02J3/36

  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

• Y02E70/30

  Systems combining energy storage with energy generation of non-fossil origin · CPC title