© Terrella Consulting Limited July 2019
TERRELLA CONSULTING

Power Factor Correction

Power factor (PF) is a big issue for UK industry that impacts energy efficiency and electricity bills as well as the reliability and availability of network infrastructure. PF is the relationship between the active and reactive power on an electricity distribution network. If it is 100% efficient then the PF would be 1. All UK electricity suppliers impose a penalty charge when power factor is lower than 0.95 Equipment such as AC motors, arc welders, furnaces, fluorescent lighting and air conditioning can cause a poor PF. The more inductive loads on a network then the more likely it is to have a poor PF. PF is improved with the introduction of capacitance onto the system. Fixed or switched staged capacitors are connected to the electrical network to counter the negative effects of the inductive loads. Depending on the capacity and complexity of the clients electrical network, PF correction systems can be applied at low or high voltages. A large selection of equipment is available and choosing the right solution can be time consuming and confusing.  Terrella have many years experience of specifying and installing PF correction system up to 11kV. The payback period for PF systems is typically 1-2 years with the client realising financial savings on an ongoing basis after that. Installing PFC equipment can provide a number of customer benefits: - Eliminating expensive utility penalties for a poor power factor - Improved energy efficiency – reduced system currents and kW losses - Security of supply - reduction in peak currents prevents fuse failure and loss of supply - Release additional capacity - Increase system load without the need to invest in additional infrastructure - Reduced kWh losses mean that less power needs to be generated, so less CO2 is produced - Increased service life of infrastructure
PROJECT MANAGEMENT ENGINEERING DESIGN CONSTRUCTION MANAGEMENT COMPLIANCE & SAFETY ENERGY REDUCTION DECOMMISSIONING ENGINEERING EXCELLENCE
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