摘要:
The invention relates to wind turbines provided with doubly fed induction generators and with at least one power converter which is novel in that, under certain circumstances, it enables the turbine to operate as a full converter (FC)system, as a doubly fed (DFIG) system or as an asynchronous (AS) system, thereby increasing turbine availability.
摘要:
The invention relates to a method and system for controlling a wind power plant connected to a power grid in the event of a power grid failure. In the electric machines forming part of the wind power plant, such as generators and transformers, it is possible to alter the terminating impedance of the neutral, introducing a plurality of active and passive elements. In this way, the current intensities flowing during grid failure are limited, thereby reducing the peak torque in the mechanical system of the wind turbines and simultaneously ensuring that grid connection requirements are met since the active and reactive currents are constantly controlled.
摘要:
The subject matter of the invention is the provision of a power-management system and method for photovoltaic installations connecting to the grid, which incorporates monitoring active and/or reactive power, account being taken at all times of grid requirements, in order to allow temporary demand arising in the grid to be addressed, thereby contributing to regulation of the grid and to the stability and quality thereof.
摘要:
The proposed invention describes an alternative for machines with at least one power unit (101) formed by at least one first electronic converter (106) connected to the rotor (109) of the generator, at least one second electronic converter (107) capable of supplying or drawing off the power which the latter is using or producing, and at least one continuous bus (108); with the proposed method it is possible to control the power of the rotor (109), modifying the synchronization speed of the asynchronous generator (103) when it is disconnected from the electrical network supply (102), by means of variation of the frequency of the currents in the rotor (109) which are generated by the first electronic converter (106).
摘要:
The present invention relates to a method and system for controlling a wind power installation connected to an electrical power grid, in case of a fault in said grid. In the electrical machines that form part of the wind power installation, generators and transformers, it is possible to change the impedance of the neutral closure introducing a plurality of active and massive elements. This limits the currents during the grid fault, thereby reducing the peak torque in the mechanical train of the wind turbines and allows guaranteeing compliance with the network connection requirements, as control of the active and reactive currents is maintained at all times.