VEKTA GROUP Energy Division produced the technical note "Onshore Substation Layout Philosophy" (document ref. LLYR-FLOV-VGED-TEC-002, rev. 0) for the Ll"yr projects grid connection, setting out the high-level principles and preliminary layout approach for the proposed Ll"yr Wind Farm Onshore Substation near National Grid's Pembroke 400/132 kV Substation, including optional AIS/GIS arrangements and space allowances for major equipment (transformers, switchgear, reactive compensation and harmonic filters).