DAIRY PROCESSING - HYBRID SOLUTIONS TO HARMONICS ISSUES
This newly commissioned facility built on a green field site was experiencing some reliability issues and unplanned outages at various locations across the electrical network. The energy efficient design had a high quantity of variable speed drives installed and the client was aware that an elevated level of harmonic currents and voltage was being constantly recorded throughout the plant.
Euro of Irish food and drinks exported
Irish produce now being sold in
of Irish food and bevs exported to the EU
It was identified that abnormal harmonic levels would have a negative impact on the performance of the facility. A full evaluation was required to ensure that the electrical distribution network would function as required and could reliably support the new milk processing production equipment.
HOW WE HELPED
Our power quality and harmonic assessment highlighted significant breaches of the voltage harmonic limits as stipulated by the IEC 61000-2-4 standard. This together with harmonics introduce a ripple (distortion) on the voltage waveform resulting in multiple zero crossings. We then modelled their electrical system to size a filtering solution that would mitigate the issues found.
A hybrid solution, composing of Active Harmonic Filters (AHF) and Passive Harmonic Filters (PHF) was recommended for a number of locations. A staged mitigation plan for filter installation matching ramp up of production allowed specific solutions exactly matching the issues at each location. This way a greater reduction in Voltage THD was achieved, preventing future failures of critical devices, reducing the energy losses due to excessive currents and extending lifespan of mission critical power equipment.
This dairy processing facility produces 100,000 tonnes of dairy powders per year.
”"Our extensive power quality and harmonic survey of the electrical distribution network identified a number of issues. Using this information we were equipped to provide a hybrid solution to meet the clients exact needs."Barry NicholsonElectrical Projects Engineer