摘要:
The system and method described herein provide grid-forming control of a power generating asset having a generator, such as a double-fed generator, connected to a power grid. Accordingly, a stator-frequency error is determined for the generator. The components of the stator frequency error are identified as a damping component corresponding to a tower damping frequency and a stator component. Based on the stator component, a power output requirement for the generator is determined. This power output requirement is combined with the damping power command to develop a consolidated power requirement for the generator. Based on the consolidated power requirement, at least one control command for the generator is determined and an operating state of the generator is altered.
摘要:
A method for operating a doubly fed permanent magnet synchronous machine and a system including such a machine and a converter for feeding and withdrawal of power. The machine has two or more winding groups where at least one winding group is connected directly to a grid and at least one winding group has the possibility to be connected to the grid via a power electronics converter or directly.
摘要:
A starter system for start up of a combined heat and power unit comprising a generator which is connectable to the grid. The starter system comprises a variable frequency drive, VFD, operable to receive power from the grid. The VFD reduces the frequency of the power, and provides the reduced-frequency power to the generator to start the generator. The starter system further comprises a bypass relay configured to bypass the VFD. The bypass relay allows direct connection between the grid and the generator after the generator has started. The variable frequency drive is configured to operate temporarily during start up of the combined heat and power unit.
摘要:
Erfindungsgemäß ist eine Vorrichtung zum Schiffsantrieb mit einem Dieselmotor, der mit einer Schiffsantriebswelle in Drehverbindung steht sowie mit einem Generator, der, durch einen Motor-Urmichter und durch einen Bordnetz-Urmichter mit einem Gleichspannungs-Zwischenkreis dazwischen mit dem Bordnetz in Verbindung, entweder Energie ins Bordnetz einspeist oder der als Hilfsmotor vom Bordnetz versorgt, den Dieselmotor unterstützt, und mit einer vom Abgas des Dieselmotors gespeisten Abgasturbine und/oder einer von seiner Abwärme gespeisten Dampfturbine, die einen Turbogenera-tor antreiben, dadurch gekennzeichnet, dass die Energieabgabe des Turbogenerators in den Spannungs- Zwischenkreis des Motor- und Bordnetz-Urmichters eingespeist ist.
摘要:
A generator system configured to be connected in parallel with other generators is disclosed. The generator system includes an alternator having a stator with an output winding and a quadrature winding and a rotor with a three-phase winding. The rotor of the alternator is rotatably driven by an engine having a controller to regulate the engine speed. An inverter receives power from the quadrature winding and generates an AC voltage for the rotor winding, The inverter receives an input corresponding to the voltage on the output winding of the stator and also receives an input corresponding to the phase angle of a second AC voltage produced by another power source. The inverter controls the frequency of the AC voltage for the rotor winding such that the phase angle of the voltage on the output winding of the stator is synchronized to the phase angle of the second AC voltage.
摘要:
A method and an arrangement in connection with a wind power plant, an electric drive of the wind power plant comprising two or more partial converters in parallel, which constitute a frequency converter of the electric drive, and each partial converter comprising a mains converter part, of which the nominal power of at least one differs from the nominal power of other mains converter parts, and in the method there is selected for use the smallest possible, individual mains converter part required by an operating point of the wind power plant, or a combination of mains converter parts.
摘要:
A method of controlling an engine-driven, electrical generator is provided. The generator generates an output voltage at a frequency with the engine running at an operating speed. The method includes the steps of connecting the generator to a load and varying the operating speed of the engine to optimize fuel consumption in response to the load. Thereafter, the frequency of the output voltage is modified to a predetermined level.