Output control device, method and program for wind farm

Patent metadata

Field	Value
Publication number	US-9584054-B2
Application number	US-201314050689-A
Country	US
Kind code	B2
Filing date	Oct 10, 2013
Priority date	Oct 16, 2012
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

A wind farm output control device includes a potential estimator estimating a maximum electrical energy outputtable by each wind power generation device, a control amount determiner determining, based on the estimated maximum power amount, a control amount for an effective power of each wind power generation device and/or a reactive power thereof in a wind farm, and a control amount distributor distributing the control amount based on an available power generation amount of each wind power generation device. The potential estimator estimates the maximum power amount based on a pitch angle of blades, an angular speed deviation of a power generator, and a conversion loss of the wind power generation device. Within the range of the estimated maximum power amount, the control amount for the output by the wind farm is distributed within a range where each wind power generation device is outputtable according to the wind condition.

First claim

What is claimed is:

1. An output control device for a wind farm provided with a plurality of wind power generation devices, the control device comprising:
a potential estimation unit that estimates a maximum amount of electrical power outputtable by each wind power generation device;
a control amount determination unit that determines, based on a value calculated by subtracting a spinning reserve of the wind farm from the maximum amount of the electrical power estimated by the potential estimation unit, a control amount on an effective power of each wind power generation device and/or on a reactive power thereof in the wind farm; and
a control amount distribution unit that distributes the control amount to each wind power generation device based on an available power generation amount of each wind power generation device.

2. The output control device for the wind farm according to claim 1 , wherein:
the wind power generation device comprises:
a blade that has a variable pitch angle;
a turbine that is rotated by wind received by the blade; and
a power generator that converts a rotation of the turbine into AC power, and

the potential estimation unit estimates an outputtable maximum amount of electrical power by each wind power generation device based on a pitch angle of the blade, an angular speed deviation of the power generator, and a conversion loss of the wind power generation device.

3. The output control device for the wind farm according to claim 2 , wherein:
the wind power generation device further comprises a converter that converts AC power generated by the power generator into DC power, and
the conversion loss includes a turbine loss based on a power released through a pitch angle control, a generation device loss based on an angular speed deviation of the power generator, and a conversion loss of the converter.

4. The output control device for the wind farm according to claim 1 , wherein the control amount determination unit determines the control amount on the effective power based on the maximum amount of the electrical power estimated by the potential estimation unit.

5. The output control device for the wind farm according to claim 1 , wherein:
the control amount distribution unit comprises a distribution gain determination unit,
the distribution gain determination unit calculates an available power generation amount of each wind power gene n device for each control cycle, and determines a distribution gain of each wind power generation device such that
the control amount determination unit increases the distribution gain of the wind power generation device with a larger available power generation amount such that a total of the distribution gains equals to a total number of the wind power generation devices that is n.

6. The output control device for the wind farm according to claim 1 , wherein the control amount detemination unit the control amount on the reactive power is determined based on a preset reactive power target value, a reactive power target value on the basis of an effective power target value and an apparent power target value, or a reactive power target value on the basis of the effective power target value and a power factor target value.

7. A output control method for a wind farm provided with a plurality of wind power generation devices, the method comprising, using a computer to perform the steps of:
estimating a maximum amount of the electrical power outputtable by each wind power generation device;
determining, based on a value calculated by subtracting a spinning reserve of the wind farm from the estimated maximum amount of the electrical power, a control amount on an effective power of each wind power generation device and/or on a reactive power thereof in the wind farm; and
distributing the control amount to each wind power generation device based on an available power generation amount of each wind power generation device.

8. The output control method for the wind farm according to claim 7 , wherein:
the wind power generation device comprises:
a blade that has a variable pitch angle;
a turbine that is rotated by wind received by the blade; and
a power generator that converts a rotation of the turbine into AC power, and

the method comprises: estimating a wind speed received by each wind power generation device based on a pitch angle of the blade, an angular speed deviation of the power generator, and a conversion loss of the wind power generation device.

9. A non-transitory computer readable medium storing an output control program for a wind farm comprising an output control device that controls respective outputs of a plurality of wind power generation devices, the program allowing a controller of the output control device to execute steps of:
estimating a maximum amount of the electrical power outputtable by each wind power generation device;
determining, based on a value calculated by subtracting a spinning reserve of the wind farm from the estimated maximum amount of the electrical power, a control amount on an effective power of each wind power generation device and/or on a reactive power thereof in the wind farm; and
distributing the control amount to each wind power generation device based on an available power generation amount each wind power generation device.

Assignees

• Toshiba Kk

Inventors

• Kosaka Yoko
• Tanomura Kenichi
• Hiromasa Katsutoshi
• Tone Yoichi
• Yamada Toshimasa
• Kusunoki Kiyoshi

Classifications

• H02P9/00 Primary

  Arrangements for controlling electric generators for the purpose of obtaining a desired output · CPC title

• F05B2270/32

  Wind speeds · CPC title

• F05B2260/821

  Parameter estimation or prediction · CPC title

• F05B2270/328

  Blade pitch angle · CPC title

• Y02E10/723

  Cross-Sectional Technologies · mapped topic