An active power filter (APF) is a sophisticated electrical device provided by Sinotech Group that plays a vital role in improving power quality. Unlike passive filters, which use passive components like capacitors and inductors, an active power filter actively generates current or voltage to counteract harmonic distortions and reactive power in the electrical system. It works by detecting the harmonic components in the load current and producing a compensating current that is equal in magnitude but opposite in phase, effectively canceling out the harmonics. This results in a clean, sinusoidal supply current, reducing THD and improving the power factor. Sinotech's active power filters are equipped with advanced semiconductor devices and digital control algorithms, enabling fast and precise compensation. They are capable of handling both steady-state and transient harmonic issues, making them suitable for dynamic load applications. These filters can be applied in various sectors, including industrial facilities with non-linear loads such as variable speed drives, welding machines, and data centers, as well as in renewable energy systems where inverter-generated harmonics need to be mitigated. By enhancing power quality, active power filters help prevent equipment damage, reduce energy losses, improve system efficiency, and ensure compliance with power quality standards. Sinotech's APFs are designed for reliability and ease of integration, offering the power industry an effective solution to address harmonic-related challenges.