# US 9,518,559 B2 · Output control device, method and program for wind farm

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- Number: US 9,518,559 B2
- Document ID: US9518559B2
- Status: Granted
- Kind: B2
- Application number: 14/677,226
- Filed: 2015-04-02
- Published: 2015-10-08
- Granted: 2016-12-13
- Earliest claimed: 2014-04-03
- Assignees: Kabushiki Kaisha Toshiba
- Applicants: Kabushiki Kaisha Toshiba
- Inventors: Katsutoshi Hiromasa; Yoko Kosaka; Kenichi Tanomura; Toshimasa Yamada; Yoichi Tone
- Web page: https://patentgrep.com/patent/US9518559B2

## CPC

- H02J 3/50: Controlling the sharing of reactive power
- F03D 7/04: Automatic control; Regulation
- F03D 7/048: {controlling wind farms}
- F03D 9/255: {connected to electrical distribution networks; Arrangements therefor}
- F03D 9/257: {the wind motor being part of a wind farm}
- H02J 3/381: {Dispersed generators}
- F05B 2260/821: Parameter estimation or prediction
- F05B 2270/335: Output power or torque
- F05B 2270/404: active, predictive, or anticipative
- H02J 2101/28: Wind energy
- Y02E 10/72: Wind turbines with rotation axis in wind direction
- Y02E 10/76: Power conversion electric or electronic aspects
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- F03D: WIND MOTORS
- F05B: INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

An output by a wind farm including multiple wind power generation devices is controlled by an output control device. To control the output, (1) a potential estimator estimates an outputtable maximum power amount by each wind power generation device, (2) a control amount determiner determines a control amount of the whole wind farm based on the maximum power amount estimated by the potential estimator, (3) a control timing adjuster adjusts a control timing of the control amount of the whole wind farm, (4) a control amount distributer distributes the control amount having undergone the control timing adjustment based on an available power generation amount of each wind power generation device.

## Claims

### Claim 1

An output control device for a wind farm including a plurality of wind power generation devices, the output control device comprising:
a potential estimator configured to estimate an outputtable maximum power amount by each wind power generation device;
a control amount determiner configured to determine a control amount of the wind farm based on the maximum power amount estimated by the potential estimator;
a control timing adjuster configured to adjust a control timing of the control amount of the wind farm; and
a control amount distributor configured to distribute the control amount having undergone the control timing adjustment based on an available power generation amount of each wind power generation device,
wherein the control amount determiner is configured to determine the control amount based on a deviation between a power target value and a power amount output by the wind farm, and, the maximum power amount; and
the control timing adjuster is configured to compensate a delay component contained in the deviation,
wherein the control timing adjuster comprises a delay phase compensator that compensates a delay phase of the control amount.

### Claim 2 (depends on 1)

The wind farm output control device according to claim 1, wherein the control timing adjuster comprises a gain adjuster configured to increase or decrease a gain of the control amount.

### Claim 3 (depends on 2)

The wind farm output control device according to claim 2, wherein:
the control amount determiner comprises:
a frequency control block configured to calculate the control amount based on a deviation between a preset frequency target value and a frequency of an output by the wind farm;
a spinning-reserve-hold control block calculating the control amount based on a deviation between a preset target value of a spinning reserve and an outputtable power by the wind farm; and
an output-change-rate-hold control block configured to perform a control in such a way that a change rate of a control amount obtained by adding the control amount calculated by the frequency control block and the control amount calculated by the spinning-reserve-hold control block is within a certain range; and
the control amount having undergone the control by the output-change-rate-hold control block is set to be a target value of the effective power.

### Claim 4 (depends on 2)

The wind farm output control device according to claim 2, wherein the control amount determiner comprises any one of the followings:
a constant-reactive-power control block configured to set a preset target value of reactive power to be the power target value;
a constant-apparent-power control block calculating the power target value based on a target value of effective power of the wind farm and a rating of each wind power generation device; and
a constant-power-factor control block calculating the power target value based on a preset power factor target value and the target value of the effective power of the wind farm.

### Claim 5 (depends on 1)

The wind farm output control device according to claim 1, wherein the control timing adjuster comprises a primary delay processor configured to compensate a primary delay of the control amount.

### Claim 6 (depends on 5)

The wind farm output control device according to claim 5, wherein:
the control amount determiner comprises:
a frequency control block configured to calculate the control amount based on a deviation between a preset frequency target value and a frequency of an output by the wind farm;
a spinning-reserve-hold control block calculating the control amount based on a deviation between a preset target value of a spinning reserve and an outputtable power by the wind farm; and
an output-change-rate-hold control block configured to perform a control in such a way that a change rate of a control amount obtained by adding the control amount calculated by the frequency control block and the control amount calculated by the spinning-reserve-hold control block is within a certain range; and
the control amount having undergone the control by the output-change-rate-hold control block is set to be a target value of the effective power.

### Claim 7 (depends on 5)

The wind farm output control device according to claim 5, wherein the control amount determiner comprises any one of the followings:
a constant-reactive-power control block configured to set a preset target value of reactive power to be the power target value;
a constant-apparent-power control block calculating the power target value based on a target value of effective power of the wind farm and a rating of each wind power generation device; and
a constant-power-factor control block calculating the power target value based on a preset power factor target value and the target value of the effective power of the wind farm.

### Claim 8 (depends on 1)

The wind farm output control device according to claim 1, wherein the control timing adjuster comprises a hunting suppression processor configured to suppress elements affected by vibration contained in the control amount.

### Claim 9 (depends on 8)

The wind farm output control device according to claim 8, wherein:
the control amount determiner comprises:
a frequency control block configured to calculate the control amount based on a deviation between a preset frequency target value and a frequency of an output by the wind farm;
a spinning-reserve-hold control block calculating the control amount based on a deviation between a preset target value of a spinning reserve and an outputtable power by the wind farm; and
an output-change-rate-hold control block configured to perform a control in such a way that a change rate of a control amount obtained by adding the control amount calculated by the frequency control block and the control amount calculated by the spinning-reserve-hold control block is within a certain range; and
the control amount having undergone the control by the output-change-rate-hold control block is set to be a target value of the effective power.

### Claim 10 (depends on 8)

The wind farm output control device according to claim 8, wherein the control amount determiner comprises any one of the followings:
a constant-reactive-power control block configured to set a preset target value of reactive power to be the power target value;
a constant-apparent-power control block calculating the power target value based on a target value of effective power of the wind farm and a rating of each wind power generation device; and
a constant-power-factor control block calculating the power target value based on a preset power factor target value and the target value of the effective power of the wind farm.

### Claim 11 (depends on 1)

The wind farm output control device according to claim 1, wherein the control amount determiner comprises:
a frequency control block configured to calculate the control amount based on a deviation between a preset frequency target value and a frequency of an output by the wind farm;
a spinning-reserve-hold control block calculating the control amount based on a deviation between a preset target value of a spinning reserve and an outputtable power by the wind farm; and
an output-change-rate-hold control block configured to perform a control in such a way that a change rate of a control amount obtained by adding the control amount calculated by the frequency control block and the control amount calculated by the spinning-reserve-hold control block is within a certain range; and
the control amount having undergone the control by the output-change-rate-hold control block is set to be a target value of the effective power.

### Claim 12 (depends on 11)

The wind farm output control device according to claim 11, wherein the control amount determiner comprises any one of the followings:
a constant-reactive-power control block configured to set a preset target value of reactive power to be the power target value;
a constant-apparent-power control block calculating the power target value based on a target value of effective power of the wind farm and a rating of each wind power generation device; and
a constant-power-factor control block calculating the power target value based on a preset power factor target value and the target value of the effective power of the wind farm.

### Claim 13 (depends on 1)

The wind farm output control device according to claim 1, wherein the control amount determiner comprises any one of the followings:
a constant-reactive-power control block configured to set a preset target value of reactive power to be the power target value;
a constant-apparent-power control block calculating the power target value based on a target value of effective power of the wind farm and a rating of each wind power generation device; and
a constant-power-factor control block calculating the power target value based on a preset power factor target value and the target value of the effective power of the wind farm.

### Claim 14

An output control method for a wind farm including a plurality of wind power generation devices, the output control method comprising:
a potential estimating step for estimating an outputtable maximum power amount by each wind power generation device;
a control amount determining step for determining a control amount of the wind farm based on the maximum power amount estimated through the potential estimating step;
a control timing adjusting step for adjusting a control timing of the control amount of the wind farm; and
a control amount distributing step for distributing the control amount having undergone the control timing adjustment based on an available power generation amount of each wind power generation device,
wherein in the control amount determining step, the control amount is determined based on a deviation between a power target value and a power amount output by the wind farm, and, the maximum power amount, and
in the control timing adjusting step, compensating a delay component contained in the deviation by compensating a delay phase of the control amount.

### Claim 15

A non-transitory computer readable medium storing a control program of controlling, through a computer an output control device for a wind farm comprising a plurality of wind power generation devices, the control program causing the computer to execute:
a potential estimating step for estimating an outputtable maximum power amount by each wind power generation device;
a control amount determining step for determining a control amount of the wind farm based on the maximum power amount estimated through the potential estimating step;
a control timing adjusting step for adjusting a control timing of the control amount of the wind farm; and
a control amount distributing step for distributing the control amount having undergone the control timing adjustment based on an available power generation amount of each wind power generation device,
wherein in the control amount determining step, the control amount is determined based on a deviation between a power target value and a power amount output by the wind farm, and, the maximum power amount, and
in the control timing adjusting step, compensating a delay component contained in the deviation by compensating a delay phase of the control amount.