AHF (Active Harmonic Filter) Systems

Modern industrial and commercial facilities use inverters, frequency converters, UPS systems, computer infrastructures, and similar power electronics-based non-linear loads, which cause harmonic currents to form in the electrical grid. These harmonic components degrade power quality and, circulating uncontrollably within the system, cause serious adverse effects on both the grid and the equipment.

Harmonics can lead to numerous problems such as excessive heating in transformers and cables, capacitor failures, malfunctioning protection equipment, voltage distortions, and resonance. This situation results in a decrease in energy efficiency at facilities, as well as unplanned shutdowns and increased maintenance costs.

Classic passive filtering methods are not always sufficient for effectively resolving these types of problems. Especially in facilities with intensive dynamic load changes, harmonics need to be monitored and suppressed in real time.

Description

AHF (Active Harmonic Filter) systems analyze harmonic currents in real time using their power electronics-based structure and inject the inverse-phase equivalent of these harmonics into the system, providing advanced filtering solutions.

As a working principle, AHF systems continuously monitor the current drawn from the grid, separate the harmonic components within it, and feed back the exact inverse-phase equivalent of these components into the system. This prevents harmonic currents from circulating within the grid and largely eliminates the formation of voltage harmonics.

AHF systems:

Provide effective filtering across a wide harmonic spectrum,
Instantly adapt to dynamic load changes,
Reduce current harmonics to levels compliant with international standards,
Completely eliminate resonance risks,
Reduce losses and equipment heating in the energy system,
Extend the lifespan of transformers, cables, and compensation equipment,
Improve system efficiency and operational continuity.
In addition to harmonic filtering, AHF systems can also contribute to reactive power compensation, thereby enhancing overall system performance in a multifaceted way.

AHF systems are particularly preferred in:

Industrial facilities with intensive variable frequency drive (VFD) usage,
UPS and data center infrastructures,
Production lines with high-density automation systems,
Hospitals, shopping centers, and commercial complexes.

During the design process, the facility’s harmonic spectrum, load characteristics, total power requirements, and system architecture must be thoroughly analyzed. Insufficient capacity selection or improper placement can directly impact system performance.

Based on detailed power quality and harmonic analyses conducted at your facility, our company identifies the most suitable AHF solution for your needs. Through the comprehensive engineering support we provide across all stages — including project design, product selection, on-site installation, and commissioning — we guarantee that your energy system operates with greater quality, safety, and sustainability.

AHF (Active Harmonic Filter) Systems