Most installations nowadays are exposed to a large number of power quality problems and challenges to comply with grid code and energy efficiency requirements as they are not designed to support nonlinear, non-balanced and variable loads and generators that make up a large percentage of modern electric power systems.
These problems and challenges originate from equipment like variable speed drives (VSD), welding machines, transformers, furnaces, lighting, double conversion UPS systems, highly dynamic loads, single-phase loads, battery chargers, railway electrification systems, fossil fuel generators and renewable generation sources, to name a few. Events like capacitor switching (from existing capacitor banks or passive harmonic filters), auto-reclose operations of transmission and distribution lines or the starting of large motors also contribute to these problems and challenges.
Active power filters are one of the fastest growing power electronics technologies for solving power quality problems and meeting grid code and energy efficiency requirements for a wide range of segments and applications.
Active power filters are a high performance, flexible, compact, modular and cost-effective type of power electronics solutions that provide an instantaneous and effective response in low or high voltage electric power systems. They enable longer equipment lifetime, higher process reliability, improved power system capacity and stability, and reduced energy losses, complying with most demanding power quality and energy efficiency standards and grid codes.
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