Power Factor Correction
Power quality is critical to efficient operation of equipment. One contributing element to power quality is power factor.
Harmonic filtering can improve equipment performance and reduce energy costs by eliminating unwanted harmonics in electrical systems created by non-linear loads.
Harmonic voltages and currents are caused by non-linear loads such as variable speed drives (VSD), uninterruptible power supplies (UPS), low energy lighting and switched mode power supplies in devices such as personal computers. Non-linear loads generate electrical harmonics by drawing current in abrupt short pulses, rather than in a smooth sinusoidal manner, introducing currents of additional frequencies which are reflected back into the system, distorting the AC waveform.
Harmonics increase the amount of power required by the system due to a reduction in power quality, contributing to a lower power factor and higher energy costs as a result of the reduced efficiency of the system.
Harmonic filtering acts to filter out the electrical harmonics in a system. This can reduce overheating of equipment, reduce nuisance tripping of circuit breakers and fuses and improve power quality contributing to reduced energy costs.
Line and load reactors – Reactors are used to provide current limiting. Reactors oppose rapid changes in current and hence limit spikes as a result of current pulses.
Passive harmonic filtering – Uses a combination of reactors and capacitors to filter out harmonic frequencies.
Active Harmonic Filtering – Provides harmonic compensation by being installed on the line side of the offending load (for example, VSD). They introduce current waveforms which cancel out undesired harmonic components.
As a leading supplier of filter solutions in Australia, Captech offer services to suit any installations and budgets. Our products range from efficient robust line reactors to the most sophisticated harmonic-eliminator passive filters.
Designed in-house, we can custom design and manufacture reactors and filters to a quality and performance suited to your specifications, coupled with comprehensive local technical support services.
All systems are designed to ensure compliance to IEE-519 “Practices and Requirements for Harmonic Control in Electric Power Systems”.