Description

AHF modular Active Harmonic Filter (AHF for short)is a perfect comprehensive solution to power quality problems with power grid such as harmonic wave(can filter 2nd to 50th harmonic interference completely), reactive power, and 3 phase load unbalance.

Active Harmonic Filter is connected in parallel in 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. and can also realize dynamic reactive compensation, and control the capacitor switching, to improve the power factor of power grid. comprehensively solving various power quality problems with power grid.

Working principle

Application Site

Active Harmonic Filtering technology can be applied to wide range of industrial or commercial environments where good power quality is essential. Active Harmonic Filters have been used for the processes that use variable speed drives (VSD), fast fluctuating loads such as welding machines, uninterrupted power supply (UPS) systems and DC load, single phase loads such as lighting and computers as well as electric arc furnaces and rolling mills.in addition,applications in data centers & IT, hospitals and laboratories,shopping malls,wind and solar farms,metro stations,steel industry,pharmaceutical industry etc.

 

Advantages

1.Excellent harmonic mitigation with guaranteed compliance

Sense the harmonic distortions created by the non-linear loads in the network and provide an effective and real-time response to cancel harmonic distortions.

 

2. Automatic voltage and frequency sensing with smart operation mode

Active Harmonic Filters come with several advanced features.Active Harmonic Filters are also equipped with the built-in smart operation mode. Under low load conditions, the smart operation mode automatically turns off the IGBTs and fans reducing the operational losses and extending the lifetime of the active harmonic filters.

 

3. Unlimited scalability

Unlimited scalability can easily be achieved Active Harmonic Filters.Higher harmonic compensation capacity can be achieved by adding Active Harmonic Filters modules in parallel without any technical limitations.

 

4. Customizable functionality with several built-in operation modes

Active Harmonic Filters functionalities can be customized anytime with a modern touch screen Human Machine Interface (HMI) to meet customer requirements.Furthermore, output capacity of Active Harmonic Filters can be flexibly used to control voltage variations, flicker mitigation, load balancing and power factor improvement.

 

5. Compact design and ease of integration

Extremely compact size allows easy integration into variable speed drives (VFDs) or capacitor bank cubicles.Active Filters can also be delivered in stand-alone wall-mounted and rack design.

 

6. Extremely low noise harmonic filtering solution

Designed with high switching frequency and special inductor core material, Active Filters can be installed into spaces where silence is vital.

 

Technical Parameters

Electrical  properties	Rated voltage	AC 400V
	Operating frequency	50Hz/60Hz
	Electrical connection	3-phase 3-wire ,3-phase 4-wire
	Filter range	2nd~50th order harmonics
	Filtering control effect	Harmonic filtering rate ≥97%
	Compensation current of each module	50,75,100,150 A
	Compensation mode	Including: Harmonic compensation, reactive compensation, and three-phase load unbalance compensation function; one or more compensation modes could be set.
	3-phase unbalance compensation effect	The degree of unbalance of three-phase active current of the system is less than 5% after compensation within the rated capacity.
	Response time	<10ms
	Active loss of system	<3%
	Output current limit	Automatically limited within 100% of rated capacity to output
	Number of units connected in parallel	≤8 units (single CT)
Control characteristics	Controller	DSP+FPGA
	Communication mode	protocol; RS485 interface, supporting mobile phone APP operation.
Structural characteristics	Level of protection	IP20
	Cooling method	Speed regulation intelligent air cooling
	Noise	<60db (<45db during low-speed operation)
	Installation method	Module embedded installation
Environmental  requirements	Ambient temperature	-20~55℃
	Relative humidity	Maximum 95%, without condensation
	Altitude above sea level	≤1,500m at rated capacity;

 

 

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