1 / 9

Understanding Grid Connection Issues for Micro Hydro Projects: Insights by Rachel Hodges

This comprehensive guide by Rachel Hodges examines the critical aspects of grid connection for micro hydro projects. Key considerations include location suitability, distance, voltage, local loads, switchgear ratings, and the type of machines used. It emphasizes the importance of synchronous and asynchronous machines, power factor control, and adhering to standards like G83 and G59 for system integration. With insights on connection applications, DNO processes, and necessary certifications, this resource is essential for project feasibility and success.

slade-sampson
Télécharger la présentation

Understanding Grid Connection Issues for Micro Hydro Projects: Insights by Rachel Hodges

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Grid Connection Issues Micro Hydro Projects Rachel Hodges

  2. Where, and how suitable is the ‘Grid’? • Tend to be in awkward locations • Consider during initial feasibility • Can be a go/no-go decision maker Look at: Distance Single / 3 Phase Voltage Local Loads Switchgear and Ratings Accommodation

  3. Synchronising • Synchronous Machine • Need inverters and controllers to match frequency of the grid • Need to consider harmonic content • Can operate in islanded system • Asynchronous or Induction Machines • Automatically match frequency of the grid • Need power factor control (switchable capacitors or DFIG)

  4. G83 versus G59 G83 G59 For up to 5MW at 20kV Connection application, connection offer and witness testing required. • For up to 16A per phase (6kW at Low Voltage) • Equipment G83 Certification • Notify the Distribution Network Operator (DNO)

  5. Connection Application • DNO will look at: • Transformer and connection capacity • Abnormal feed conditions • Fault Levels • Voltage Rise (P28) • Voltage Step Change, Flicker and Harmonics (G5/4) • Loss of Mains (Islanding) Protection and Earthing (G59)

  6. Connection Offer • Can take up to 90 days • Connection offer will indicate: • Non-contestable work and costs (to be undertaken by DNO) • Contestable work (undertaken by accredited 3rd party or DNO) • Constraints • Timeframes

  7. G59 Protection • Under and Over Voltage • Under and Over Frequency • Loss of Mains (ROCOF, Vector Shift, Intertripping)

  8. Metering • ROCs • Import / Export • Export MPAN from Supplier • Power Purchase Agreements • Benefits of Onsite Generation

  9. Grid Connection Issues Micro Hydro Projects Rachel Hodges

More Related