Static var generators (SVGs) are primarily utilized for power factor correction. They are engineered to regulate the flow of reactive power within electrical systems, ensuring it is supplied or absorbed as necessary to maintain a near-unity power factor. By doing so, SVGs alleviate the burden of supplying reactive power and enhance the overall efficiency of the system.
At the heart of an SVG lies its power electronic converter, which can either produce or consume reactive power depending on the system's requirements. In instances where the system exhibits a lagging power factor, indicative of an excess of reactive power, the SVG absorbs this surplus, thereby reducing the lagging power factor towards unity. Conversely, in situations where the system demonstrates a leading power factor, signaling a deficiency of reactive power, the SVG can generate reactive power to balance the system and uphold a power factor close to 1.
Traditional capacitance compensator has high harmonic content. The output current of traditional capacitor compensator usually contains more harmonics, and it is often needed to be used with passive or active power filters to reduce harmonic pollution. SVG can eliminate the odd harmonics in the output current by multiple, multilevel or cascade technology, so that its output waveform is closer to sine wave.
SVG running current waveform (current harmonic content < 2.5%)
A static variable rate generator is employed to mitigate harmonic distortion and regulate power factors within an electrical system. An essential factor contributing to the efficiency of an electrical system is its power factor, which quantifies how effectively electrical power is converted into useful output.
