The Cork Lower Harbour Energy Group is made up of four healthcare manufacturing sites that collaborated to develop a renewable wind energy plan for each site. The member companies, Janssen Biologics (formerly Centocor), DePuy, GlaxoSmithKline and Novartis, are committed to improving the cost competitiveness of each site in order to attract additional investment into Ireland.
Three of these large industrial sites plus one large third party site shared a common supply from ESB networks. The design of the electrical system was complicated by the fact that these large scale wind turbines were being connected to industrial sites that contained mission critical processes, where interruption to the electrical supply could result in huge financial losses.
Premium Power was engaged by the four sites sharing the common supply to address and resolve the critical issues that could affect electrical system reliability and any adverse consequences of adding the wind turbines to the network.
This involved modelling the complete electrical networks at four sites and all utility connections between these. One of the sites also appointed Premium Power to carry out detailed electrical design. The issues that needed to be addressed included:
“This was a challenging project with four large pharmaceuticals involved. We were delighted to be in a position to assist in delivering on their network and embedded generation requirements.”
Premium Power completed the NC5 applications, harmonic resonance and transient stability studies and load flow and short circuit analysis for the site. We presented a preliminary design for provision of harmonic and transformer inrush mitigation. We also provided comprehensive power quality monitoring and alarming system, controls for turbine power management, generator testing and emergency procedures. A detailed design, supply and commission of pre-insertion resistor (transformer inrush mitigation) was also provided.