Vestas Wind Systems A/s

Vestas Wind Systmens A/s

Kouroush Nayebi

Mu Wei

Jorge Martinez Garcia

Mads Rajczyk Skjelmose

Torsten Lund

Jesper Sandberg Thomsen

Manoj Gupta

Henrik B Møller

Martin Ansbjerg Kjær

Janakiraman Sivasankaran

Ravi Kumar

Søren Kappelgaard

Rubin Panni

Dumitru-Mihai Valcan

Rasmus Lærke

Gert Karmisholt Andersen

John Godsk Nielsen

Germán Claudio Tarnowski

Eik Herbsleb

Henrik Møller

Steve Jessen

Jacob Barsøe Kjærgaard

Athanasios Rokofyllos

Chun Meng Heng

Jacob Deleuran Grunnet

Poul Brandt Christensen

Ciprian Biris

Leif Svinth Christensen

Esmaeil Ebrahimzadehveshareh

Uffe C Merrild

Brian W Andersen

Sridhar Sahukari

Dan Wu

Mehrdad Babazadeh

Peter Frederick Mayer

Hans Kristian Bjørn

Vajira Suminda Ganepola

Mario Dante Jardiel

Bo Yin

Henrik Møller Ravn

Anoop Vijay Tiwari

Thair Mahmoud

Jacob Jensen

Ines Pereira Barreira

Andreas Svendstrup-Bjerre

Lennart Beland

Kennet Kirk Jensen

Jesurathinam Arockia Arun Prasad

Per Lund

Thomas Schmidt Grau

Jacob Barsøe KJÆRGAARD

A method of operating a power plant that includes receiving a measured frequency of a power network to which the power plant is connected, and determining whether the measured frequency falls within a first frequency sub-band that overlaps a network-defined frequency deadband. Based at least in part on the measured frequency, a first control signal is output, indicative of either: a first power offset for application to a baseline frequency curve for the power plant to generate a set point for controlling a power characteristic of the power plant; or a set point for controlling a power characteristic of the power plant, the set point being based on a first power offset applied to a baseline frequency curve for the power plant.

Methods and systems for controlling a power plant during network frequency fluctuations

Control techniques for controlling a reliability of a spinning reserve of a wind turbine to be tailored to a user's reliability preference are disclosed. In one aspect, a control technique includes operating a wind turbine in a spinning reserve mode to provide a spinning reserve; calculating an available power of the wind turbine when operating in the spinning reserve mode; defining a reliability band around the calculated available power; selecting a reliability factor that defines a probability that a reliable available power within the reliability band is below the real available power; determining the reliable available power based on the selected reliability factor and the reliability band; determining a power setpoint for the wind turbine based on a difference between a desired spinning reserve and the determined reliable available power; and controlling the wind turbine to operate in the spinning reserve mode in accordance with the power setpoint.

Wind turbine spinning reserve with selectable confidence level

The invention relates to a method for controlling a power plant for providing frequency support to a power grid. The power plant comprises an electrical storage unit and a power generating system comprising one or more power generating units including at least one wind turbine generator. The method comprises setting a frequency control period, wherein the electrical storage unit is scheduled to charge or discharge according to a first power set-point and at the start of the frequency control period, charging or discharging the electrical storage unit according to the power set-point. In case of a frequency deviation, a power change of the power from the electrical storage unit is determined based on the frequency deviation. Frequency support is provided by controlling the electrical storage unit to charge or discharge according to a second power set-point determined from the power change.

Frequency support from a power plant with an electrical storage unit

Operating a renewable energy power includes receiving a measurement signal indicative of a measured power characteristic of the plant at a point of connection to a power network; controlling the plant) according to a normal mode of operation to provide power by determining and dispatching power set points, the power set points being determined by: acquiring samples of the measurement signal at a sample rate; and determining the power set points based on the sampled measurements and a target level for the measured power characteristic; and monitoring the measurement signal to detect an undersampled oscillation of the measured power characteristic in the sampled measurements, and thereby detecting a control fault; and then controlling the plant according to a fault mode of operation.

Control of a renewable energy power plant to detect a control fault

The invention relates to wind turbines, particularly to controlling reactive power exchange between a power grid and a wind power plant. The wind power plant has a plurality of wind turbine generators each having a corresponding power converter with a converter controller. Further, the wind power plant has a power plant transformer with an on load tap changer coupled between the wind power plant and the power grid. The power plant controller is regulating the on load tap changer and is generating reactive component setpoints for the wind turbine generators, when determining a need for production of short-term reactive power due to a sudden change in reactive power measured at the point of common coupling.

Method for controlling reactive power exchange between a power grid and a wind power plant

The invention relates to a power plant connected to an electrical grid and a method for controlling the power plant. The power plant comprises one or more power generators and at least one synchronous condenser. The power generators may be wind turbine generators, solar photovoltaic elements or other kinds of renewable power generators. During a deviation in frequency on the electrical grid, the synchronous condenser counteracts the frequency deviation, but it may also unintentional supply active power during the frequency event. The control method is controlling the active power supply from the power generators during the frequency events based only on the active power output from the power generators.

Method for controlling a power plant with a synchronous condenser, and power plant

The invention relates to a method for providing power ramp rate control of a hybrid power plant with a plurality of energy assets including wind turbine generators and possibly solar power units, and an energy storage unit. Each energy asset has a ramp rate capability defined as the highest possible ramp rate at a given time, and the method includes receiving from each energy asset the corresponding ramp rate capability, and taking into account the ramp rate capabilities from the energy assets when calculating the power setpoint to each energy asset, so as to improve the power ramp rate control of the hybrid power plant.

Method for improved power ramping in a hybrid power plant

The disclosure relates to a method of operating a wind power plant, and related power plant controller and wind power plant. The method comprises determining a first active power at a first operating point and applying a first limit value for a reactive power limit. The method further comprises determining a second active power at a second operating point. The method further comprises, responsive to determining that the second active power meets one or more active power conditions referenced to the first active power, applying a second limit value for the reactive power limit. Applying the second limit value comprises limiting a ramp rate of the reactive power limit. The method further comprises generating control signals for one or more wind turbines to control a collective reactive power output of the wind power plant in accordance with the reactive power limit.

Dynamic control of reactive power limits of wind power plant

The invention relates to a method for controlling power generation of a VSM wind turbine. The wind turbine comprises a machine side converter, a line side converter, a DC link, and an electric storage device electrically connected to the DC link. The method comprises determining a first power control signal to the machine side converter, determining a second power control signal for controlling a desired output power of the line side converter based on a storage device voltage error, and a power production reference, and determining a charging current reference for controlling charging and discharging of the electric storage device based on a DC-link voltage error.

Grid forming wind turbine with an electric storage

There is provided a method for operating a renewable energy power plant comprising a plurality of renewable energy generators, the method comprising: calculating a rate of change of reactive power reference level for transitioning between a present reactive power reference level, output by a reactive power controller, and a target reactive power reference level, the target reference level being suitable for normal operation of the renewable energy power plant; and, following a fault on a power network to which the renewable energy power plant is connected, dispatching a control signal for controlling the renewable energy power plant to generate or consume reactive power at the calculated rate of change to transition the reactive power level of the renewable energy power plant to the target reactive power reference level.

Control of a renewable energy power plant to resume normal operation following a fault

Controlling a current injected to a power grid from a renewable power plant, in response to a voltage event in the power grid. At least a current at a point of common coupling between the renewable power plant and the power grid is determined and provided to a power plant controller (PPC). The PPC derives individual current setpoint corrections for at least some wind turbines, based on the determined current, and dispatches each derived current setpoint correction to wind turbine controllers of the corresponding wind turbines. The wind turbine controllers control a current output of the respective wind turbines, based on measurements of current and/or voltage at a point of connection between the wind turbine and an internal grid of the renewable power plant, and by taking into account the dispatched current setpoint correction.

Method for controlling a renewable power plant during voltage events

Embodiments provide for the control of a power plant including several generators by setting a reference frame for the generators with a first and a second axis; measuring a grid demand voltage at the shared connection point; determining active and reactive currents required at the shared connection point based on the grid demand voltage and grid codes; transforming the active and reactive currents required at the shared connection point to the reference frame where the first axis defines a first current set point and the second axis defines a second current set point; and dispatching the first and second current set points to generator controllers associated with each generator. Current set points may be generated for positive/negative frames, direct quadrature frames, real/imaginary frames and may be set evenly for all generators or adjusted per generator.

Current dispatching for power plant control

The present invention relates to a method for releasing a requested amount of power from a power facility to an associated power grid, the method comprising the steps of providing a release signal as to when the requested amount of power is to be released from the power facility to the associated power grid, ramping up the power generation of the power facility, and releasing the requested amount of power to the associated power grid in accordance with the release signal, wherein at least part of an excess power generated during ramping up is dissipated and/or stored in suitable power handling modules. The present invention also relates to a power facility controller being capable for performing this method.

Method for ramping up power in a power facility

There is provided a method of operating a renewable power plant that is connected to a wider power network by a bus. The method comprises: identifying a predetermined voltage condition of the renewable power plant or of the bus; controlling the renewable power plant to maintain zero reactive power exchange at the bus for a first period; calculating an average voltage level of the bus that was achieved during the first period; and controlling the renewable power plant to maintain the voltage output at a set voltage level for a second period, the set voltage level being substantially equal to the calculated average voltage level. The method ensures that voltage oscillations due to a push-pull phenomenon between a power plant controller and the power network do not upset the stability of the grid.

Adaptive control for networked renewable power plants

The present invention relates to a method for controlling a wind power plant, WPP, comprising a plurality of wind turbine generators, WTGs, connected to an electrical grid, the method comprising: setting a plant power reference (Ptotal) according to an electrical value of the electrical grid; determining an inertia delta power reference (IRdeltaP) required for the WPP to meet a power demand in response to a change in the electrical value; adding the inertia delta power reference and the plant power reference (Ptotal) to form a power reference (Ptotalref); deriving an overboost reference (PrefOB) as the difference between the power reference (Ptotalref) and an available power value; dispatching the power reference (Ptotalref) to each wind turbine generator; dispatching the overboost reference (PrefOB) to each wind turbine generator. The invention also relates to a wind power plant control system and a wind power plant comprising a control system.

Control of a wind power plant

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Ikast, Denmark

Kouroush Nayebi