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This paper presents a control strategy of a micro-wind turbine system (WTS) in AC MicroGrid (MG) with the capability of providing ancillary services to the MG and participating to its regulation. The WTSs can be controlled to operate at their maximum efficiency or as controllable source by tracking a power reference set by the energy management system. Hence, the active control of micro-wind turbine...
This paper presents a distributed control technique for voltage, frequency and active/reactive power control of the Point of Common Connection (PCC), AC grid, of a wind farm. Each wind turbine uses a Permanent Magnet Synchronous Generator (PMSG) with a full back-to-back VSI topology connected between the machine terminals and the PCC. A Diode-Thyristor converter topology forming a HVDC link is used...
This paper introduces the use of a diode based HVdc rectifier for the connection of a large off-shore wind power plants (WPP) to an existing multiterminal VSC-HVdc grid. Wind turbines with fully rated converters are used to control the offshore ac-grid voltage and frequency and the power delivered by the WPP. Moreover, the proposed topology allows for black-start operation of the off-shore WPP and...
This paper introduces the use of integrated Wind Power Plant and HVdc link control for the connection of off-shore wind farms to multi-terminal HVdc links. Connection to both multi-terminal VSC-HVdc and to LCC-HVdc links is considered. WPP connection using a diode rectifier station for the aforementioned scenarios is validated by means of detailed PSCAD simulations, including the HVdc links and a...
This paper shows that it is possible to substantially reduce the rectifier capacitor and filter banks when using diode based HVDC link for the connection of large off-shore wind farms. The considered wind turbines are based on full power power converters. The paper includes a control strategy that allows the wind turbine front-end converters to control the offshore ac-grid voltage and frequency and,...
The filter bank size is one of the main deterrents for the use of otherwise more efficient LCC-HVDC links for the connection of large off-shore wind farms. This paper shows how the HVDC rectifier filter banks can be substantially reduced by taking advantage of the additional control flexibility offered by the use of wind turbines with fully rated converters. PSCAD simulation results are shown where...
This paper introduces a new technique for the distributed voltage and frequency control of the local ac-grid in off-shore wind farms based on synchronous generators. The proposed control technique allows the connection of the off-shore wind farm using a diode based HVDC rectifier. The system comprising the wind farm and the diode HVDC rectifier can be operated in current or voltage control mode. Fault...
Today, it is common the use of a static power converters to adapt the available energy from a clean source to feed an electrical load. Wind energy conversion systems have become one of the principal areas of research on renewable energies. This research has permitted the development of different topologies and control strategies of power converters to be used on wind energy extraction. This paper...
The present paper introduces the study and validation of a voltage and frequency control technique of Synchronous Generator based off-shore wind farms connected with a line commutated HVDC link with an uncontrolled rectifier. The proposed control technique is based on the use of standard practice current control for the wind turbines and outer, slower loops for voltage and frequency control. The proposed...
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