Vyrnwy Frankton IEOI PQQ

This Invitation for Expressions of Interest (IEOI) is issued by Green GEN Cymru Limited to seek expressions of interest for the provision of the Packages 1 - 4 for the Vyrnwy Frankton Project. Th purpose of this document is to: a) Inform the market of: (i) The scope of services; and (ii) An outline of the procurement process and timeline; b) Invite parties to express their interest in participating in the Invitation to Tender (ITT) stage for each Package; and c) Seek preliminary responses to a Pre-Qualification Questionnaire (PQQ) to derive a shortlist of Tenderers to be invited to participate in the ITT for each Package. 1.2 Project Background The Green GEN Cymru portfolio, Vyrnwy Frankton, is to be serviced by a 132kV high-capacity double circuit connecting into National Grid Electricity Transmission (NGET) Network. The main line comprises overhead steel lattice tower. The Green GEN Cymru contracted generation connections will be made via a network of 132kV wood pole circuits, underground cables, switching and substations. FEED contract is in place to provide the initial design detail and is being delivered by Stantec. The consultant is undertaking the Principal Designer role during the FEED contract phase; the Principal Design role will be transferred to the Detailed Designer. 1.3 Scope 1.3.1 Package 1 - Substations The Vyrnwy Frankton electrical network comprises 7 distinct sites, which include: • Switching Stations • Collector Stations • Transformer Substations Several sites will incorporate: • Reactive Power Compensation Systems • Harmonic Filtering Equipment The Contractor is expected to design, install, construct, and commission the following but not limited to: Civil Works • Site platforms and foundations • Control buildings and auxiliary structures • Internal / External Access roads • Transformer Bund • Cable troughs • Surface / Foul / Oily water drainage (as required) • Site Security • Water Supply • Fire Fighting Supply • Flood Resilience (as required) • Landscaping / screening (as required) • Construction Compound Primary Works • High-voltage switchgear • Power transformers • Instrument transformers • Busbars, disconnectors, and circuit breakers • Reactive compensation units (e.g., capacitor banks, STATCOMs) • Harmonic filtering equipment Secondary Works • Protection systems (relays, merging units) • Control systems (SCADA, RTUs, PLCs, GPS clock) • Building Management System (HVAC, lighting, security) • Communication infrastructure • Metering and monitoring systems The switching/substation sites proposed for are indicated as follows: Site Name Lower Frankton Switching Station Cors y Gareg Collector Station Llyn Lort I Energy Park Switching Station Rhiwlas Substation Banc Du Energy Park Switching Station Esgair Galed Energy Park Switching Station Waun Hesgog Energy Park Switching Station The Contractor is expected to establish temporary working areas to include construction compounds, laydown areas, parking and welfare facilities. The Contractor is expected to provide as-built records once construction is complete. Package 2 - Tower line The double circuits from the NGET points of connection into mid Wales are predominantly overhead, with steel lattice towers of the L7(c) design carrying twin ACCC (Aluminium Conductor Composite Core) "Hamburg" conductors and an OPGW earth wire. The successful contractor will be responsible for the full detailed design and construction works associated with Vyrnwy Frankton tower line needs. The total route length of the tower line for Vyrnwy Frankton is approximately 45km. The intent is that the following long-time items will be procured by GGC and novated to the contractor: • Tower steel work • ACCC phase Conductor system Design Works: Full tower loading and strength assessment for the initial alignments produced by the FEED contractors, to include the detailed design of any tower strengthening requirements where necessary. The design of all tower foundations. …