# US 12,009,661 B2 · Passive reactive compensation for a wind power plant

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- Number: US 12,009,661 B2
- Document ID: US12009661B2
- Status: Granted
- Kind: B2
- Application number: 17/928,804
- Filed: 2021-05-18
- Published: 2023-07-20
- Granted: 2024-06-11
- Earliest claimed: 2020-06-09
- Assignees: Siemens Gamesa Renewable Energy A/S
- Applicants: Siemens Gamesa Renewable Energy A/S
- Inventors: Nikolaus Goldenbaum
- Web page: https://patentgrep.com/patent/US12009661B2

## CPC

- H02J 3/18: Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J 3/1821: using shunt compensators
- H02P 9/02: Details {of the control}
- 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
- Y02E 40/30: Reactive power compensation
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A method of transmitting reactive power between at least one wind turbine and a power system through a transformer connected between the at least one wind turbine and the power system, the wind turbine including a power converter. The method includes a second step of connecting at least one passive device to the transformer and reducing or increasing a reactive power of the power converter of an amount corresponding to the reactive contribution from the passive device.

## Claims

### Claim 1

A method of transmitting reactive power between at least one wind turbine and a power system through a transformer connected between the at least one wind turbine and the power system, the at least one wind turbine including a power converter, the method including:
a first step of ramping a reactive power from a maximum reactive import towards a maximum reactive export up to when a first threshold is reached,
a second step of connecting at least one passive device to the transformer and reducing a reactive powder of the power converter of an amount corresponding to the reactive contribution from the at least one passive device,
a third step of ramping the reactive power towards the maximum reactive export up to when the maximum reactive export is reached.

### Claim 2 (depends on 1)

The method of claim 1, wherein the first threshold is a fraction of the maximum reactive export comprised between 2% and 10%.

### Claim 3

A method of transmitting reactive power between at least one wind turbine and a power system through a transformer connected between the at least one wind turbine and the power system, the at least one wind turbine including a power converter, the method including:
a first step of ramping a reactive power from a maximum reactive export towards a maximum reactive import up to when a second threshold is reached,
a second step of connecting at least one passive device to the transformer and increasing a reactive power of the power converter of an amount corresponding to the reactive contribution from the at least one passive device,
a third step of ramping the reactive power towards the maximum reactive import up to when the maximum reactive import is reached.

### Claim 4 (depends on 3)

The method of claim 3, wherein the second threshold is a fraction of the maximum reactive import comprised between 2% and 10%.