Open Source Power Quality Meter with cloud monitoring

Abstract

Energy saving and energy conservation are fast becoming key ideologies in the construction and creation of modern data centres and IT infrastructure. This applies to large scale deployments and on smaller to more intermediate scale sites. Data centres consume large quantities of energy and contribute to carbon dioxide (CO2) emissions. Reducing CO2output using methods such as sustainable power generation and better energy efficiency can help mitigate against the effects of global warming. This paper proposes methods of saving energy in IT equipment by monitoring key power statistics such as power factor to determine the efficiency of the power being used by network equipment. This is achieved using an open-source power factor meter which is not only low cost but also accurate. The meter measures power factor as well as true power, apparent power, reactive power, mains voltage, current, and mains frequency to determine the energy efficiency of the installation or equipment. Readings are measured using three primary sensors; a current transformer, voltage transformer, and a mains frequency sensor. The system is designed for use with single-phase systems and incorporates a local HMI and a cloud-based CMS system. All of the software and hardware elements used are open source and therefore low cost.