The frequency of the New Zealand power system is maintained within a narrow band around 50 hertz. Frequency keeping refers to the ancillary service used to maintain the frequency of the power system within the desired band.
Frequency keeping generation plant increase or decrease generation in response to short-term supply and demand imbalances to ensure that frequency is kept at or near 50 hertz. Generators offer in to the wholesale market their willingness to supply frequency keeping services. These offers are then dispatched, or cleared, by the frequency keeping selection tool prior to the energy and reserves dispatch being determined by SPD, the market clearing engine.
All frequency keeping offers and the offers actually dispatched to supply frequency keeping services are available for download on a daily basis.
|Name||Date modified||File size|
|DispatchedOffers||18 Jan 2021|
|Offers||18 Jan 2021|
Datasets are collections of files that often contain large volumes of data and are available for immediate download. Dataset users are typically analysts familiar with the electricity industry and have a need to obtain a large set of data or specific data on a regular basis.
Visit the glossary for a list of defined terms used on the website.
Visit the forum to see if the information you are looking for is already available or ask a question to see if some of our informed users or staff can help?
Alternative methods are supported to connect to EMI datasets. These methods better facilitate downloading many files or automating regular downloads. See here for more information.