METHODS AND SYSTEMS FOR CONTROLLING A POWER PLANT DURING NETWORK FREQUENCY FLUCTUATIONS WITHIN A FREQUENCY CONTINGENCY DEADBAND
According to an aspect of the present invention there is provided a method of controlling a renewable energy power plant to provide frequency regulation for a power network, to which the power plant is connected The power plant comprises a plurality of power units operable to provide upregulation an...
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Zusammenfassung: | According to an aspect of the present invention there is provided a method of controlling a renewable energy power plant to provide frequency regulation for a power network, to which the power plant is connected The power plant comprises a plurality of power units operable to provide upregulation and/or downregulation of the power network. The method comprises: receiving a measured frequency level of the power network indicative of a frequency deviation within a frequency contingency deadband of the power network; identifying a sub-band of the frequency deviation, from amongst a plurality of sub-bands within the frequency contingency deadband, based on the measured frequency level; identifying one or more power units authorized for at least one frequency regulation service within the identified sub-band; determining a deliverable power offset from a baseline power level for each authorised power unit, the deliverable power offset being based, in part, on the at least one authorised frequency regulations service; and determining and dispatching power set points to the one or more authorised power units to satisfy a plant power offset request for the measured frequency level. The set points are determined by: selecting one or more of the authorised power units to provide the deliverable power offset determined for that power unit, wherein a cumulative power offset of the one or more selected power units is less than or equal to the plant power offset request; and if there is a power shortage between the plant power offset request and the cumulative power offset, determining set points for the remaining authorised power units to satisfy the power shortage.
Selon un aspect, la présente invention concerne un procédé de commande d'une centrale électrique à énergie renouvelable pour fournir une régulation de fréquence pour un réseau électrique, auquel est connectée la centrale électrique. La centrale électrique comprend une pluralité d'unités de puissance qui peuvent fonctionner pour fournir une régulation à la hausse et/ou une régulation à la baisse du réseau électrique. Le procédé consiste à : recevoir un niveau de fréquence mesuré du réseau électrique indiquant un écart de fréquence à l'intérieur d'une bande morte de contingence de fréquence du réseau électrique ; identifier une sous-bande de l'écart de fréquence, parmi une pluralité de sous-bandes à l'intérieur de la bande morte de contingence de fréquence, sur la base du niveau de fréquence mesuré ; identifi |
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