Active Harmonic Filter Cabinet The active harmonic filter employs the latest advanced analog logic to eliminate power grid harmonics, real-time detecting current waveforms in the grid caused by nonlinear loads, dynamically generating reverse harmonic currents to compensate for load harmonic currents. It boasts fast response time, wide filtering range, high filtering efficiency, immunity to system parameters, and compact size, aiming to improve power quality, reduce grid losses, enhance power supply utilization efficiency, and increase load capacity. It is an ideal active harmonic filter product. The main circuit is an IGBT power converter, utilizing detection technology based on the instantaneous reactive power theory, automatically tracking changes in grid harmonics, with high controllability and rapid responsiveness. It overcomes the drawbacks of traditional passive harmonic filters, such as poor filtering performance, prone to resonance, and the ability to filter only fixed-order harmonics, providing excellent filtering and compensation effects for various rapid and transient shock loads.

Active Filter Cabinet
★ Modular, brick-like expandable parallel structure for easy expansion
★Easy maintenance, supports online maintenance
★High reliability, even temperature distribution
★ Pure FPGA-based Control System
★ Data is transmitted between the controller and APF module using fiber optics.
★Under any load condition, the compensated system current THDi is less than 3%.
Open-loop and closed-loop control combined control method
★Excellent damping capability
★ Three-level main current topology




Shanghai Kofele Electrical Co., Ltd. specializes in the research, development, and production of zero-line current harmonic control devices, including active harmonic filter cabinets, emergency lighting centralized power supplies, zero-line current eliminators, zero-sequence filters, zero-line current blockers, and fire emergency sign lighting fixtures, and more. For detailed information, please feel free to inquire.
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