ZDDQ Active Harmonic Filter

Active Harmonic Filter is a perfect comprehensive solution to power quality problems with power grid such as harmonic wave, reactive power, and three-phase load unbalance. ZD-AHF-4 active harmonic filter is connected in parallel in 380V~456V power grid, to detect the harmonic wave in power grid in real time, generate the reverse-phase compensation current through the converter, and dynamically filter the harmonic wave in power grid. The operation of AHF is unaffected by power grid structure and load type, and it will not produce harmonic oscillation with the system, thus perfectly realizing harmonic wave control of various loads. AHF can also realize dynamic reactive compensation, and control the capacitor switching, to improve the power factor of power grid. Meanwhile, Active Harmonic Filter has the function of controlling the three-phase load current unbalance, thus comprehensively solving various power quality problems with power grid.

Useful in places like the hospitals, Airports, shopping malls, etc. where the harmonic loads are generated.

Meet IEE and other international standards performance

Used at the output of UPS to reduce the effect of harmonic signals and increase capacity.

Can acts as a Hybrid filter combining with Acticcomp and Active filter and thus provided a reduction in cost.

Helps improve the power factor of UPS, rectifiers, etc. in all types of installations.

Variable Speed Drives

The most common application for Active Filters is the compensation of harmonics generated by variable speed drives, often referred to as VFDs or Frequency Converters. Drive systems have the benefits of lower losses and increased production flexibility at the cost of higher harmonics emissions. Harmonics emissions make passive compensation unsuitable. Active harmonic filtering, especially with a modular approach, allows successive installation and mitigation of selected harmonics.

Welding Plants

Electrical welding systems place uneven demands with extremely high peaks in current demand during short periods. The resulting highly fluctuating voltage levels cause flicker. Flicker emissions can cause disturbances with other electrical consumers such as neighboring industries or residential areas and can cause reliability issues with nearby equipment. Active Filters can mitigate Flicker.

Furnaces

Furnaces and casting processes are known to give rise to both flicker and harmonics. This is largely due to being some of the most energy intensive production processes today. Active Filtering technology is ideal to combat both of these issues to increase production stability and reduce effects on the grid.

Wind and Solar Power Systems

A major problem inherent in many renewable energy sources today is the inconstant load delivered to the grid. Both wind and solar energy is delivered as wind and sun is available, causing surges of energy that the existing grid is usually not built for. The remote location of these energy plants also means that grid connections are suboptimal.

Wind power systems cause flicker, harmonics or interharmonics as well as other problems. Solar power plants cause harmonics and interharmonics. In some cases, especially in weaker networks, resonances may be excited by the harmonic output of the solar inverters. Modern Active Filtering technology is very effective in combatting these problems; reducing the stress placed on the grid and making these renewable energy sources more effective and widely viable.

Lighting

Light systems can cause harmonics that heat neutral conductors and disturb nearby equipment. This can mean production disturbances and unnecessary maintenance costs. Modern energy saving lamps may be more likely to cause disturbances depending on type. Active Filters are well suited to combat these problems.

UPS Systems

UPS or Uniterruptible Power Suplies can save lives as well as data and financial loss. A UPS system connected to a network polluted with harmonics can malfunction and has a shortened life span. Connecting an Active Filter to secure uninterrupted power supply will ensure production uptime.