Project:
Dean Frazer, who is studying a BEng(H) in Electrical and Electronic Engineering at UHI North Highland, won a £1,000 Engineers in Business Prize for his Green Power Factor Solutions Rapid SCADA & Arduino for Autonomous, Scalable and Economical Power Factor Correction of Inductive Loads in Electrical Systems. Dean was presented with his prize by Professor Neil Simco, Deputy Principal Academic and Research at UHI
Power factor is the system’s efficiency. Inductive loads reduce the power factor increasing power consumption and current used, increasing bills and causing potential damage to cables and equipment. The power factor can be corrected by adding capacitance into the system via capacitor switching.
A low-cost power factor correction device will monitor the system’s electrical quantities using analogue signal conditioning and Arduino microcontroller. Voltage, current, power factor and power values will be sent to Rapid SCADA where the user can monitor the values via real-time data and graphs over time. If the power factor drops below the pre-defined level, the Arduino will switch capacitors via relays to raise the power factor, reducing the power used. An event log will record all changes for system analysis to further improve efficiency.
Capacitors will be calculated for size and Arduino-Rapid SCADA communication method will be chosen on a system-by-system basis to meet the user’s needs. Communication can be wireless. Access to Rapid SCADA can be via PC and mobile device; layout and operation can be configured to the user’s preference. Programming and system analysis can be done remotely on a rolling basis for the user to further improve efficiency.
The product can be applied to any electrical installation that uses inductive equipment; or to single machines to improve the power factor; save energy and improve safety. The market is dominated by large companies that offer solutions at high cost. This device can offer the solution at a much lower cost with remote support.