Active Harmonic Filter (AHF)—Single Phase

Short Description:

Harmonic Control, Reactive Power Compensation, Three-Phase Unblance Control

Product Detail

Product Tags

Product Summary:

Active harmonic filters (AHF) are the ultimate answer to power quality problems caused by waveform distortions, low power factor, voltage variations, voltage fluctuations and load unbalance for a wide range of segments and applications. They are a high performance, compact, flexible, modular and cost-effective type of active power filters (APF) which provide an instantaneous and effective response to power quality problems in low or high voltage electric power systems. They enable longer equipment lifetime, higher process reliability,improved power system capacity and stability, and reduced energy losses, complying with most demanding power quality standards and grid codes.

AHFs eliminate waveform distortions from the loads like harmonics, inter harmonics and notching,and harmonic voltages caused by harmonic currents, by injecting in real-time the distorted current of same magnitude but opposite in phase in the electric power system. In addition, AHFs can take care of several other power quality problems by combining different functions in a single device.

Working Principle:

External CT detects the load current, DSP as CPU has advanced logic control arithmetic, could quickly track the instruction current, divides the load current into active power and reactive power by using the intelligent FFT, and calculates the harmonic content rapidly and accurately. Then it sends PWM signal to internal IGBT's driver board to control IGBT on and off at 20KHZ frequency. Finally generates opposite phase compensation current on inverter induction, at the same time CT also detects the output current and negative feedback goes to DSP. Then DSP proceeds the next logical control to achieve more accurate and stable system.

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Technical Specifications:

TYPE Series 220V
Max neutral wire current 23A
Nominal voltage AC220V(-20%~+20%)
Rated frequency 50Hz±5%
Network Single phase
Response time <40ms
Harmonics filtering 2th to 50th Harmonics,The number of compensation can be selected, and the range of single compensation can be adjusted
Harmonic compensation rate >92%
Neutral line filtering capability /
machine efficiency >97%
Switching frequency 32kHz
Feature selection Deal with harmonics/Deal with harmonics and reactive power
Numbers in parallel No limitation. A single centralized monitoring module can be equipped with up to 8 power modules
Communication methods Two-channel RS485 communication interface (support GPRS/WIFI wireless communication)
Altitude without derating <2000m
Temperature -20~+50°C
Humidity <90% RH,The average monthly minimum temperature is 25℃ without condensation on the surface
Pollution level Below level Ⅲ
Protection function Overload protection, hardware over-current protection, over-voltage protection, power failure protection, over-temperature protection, frequency anomaly protection, short circuit protection, etc
Noise <50dB
Installation Rack/wall hanging
Into the way of line Back entry (rack type), top entry (wall-mounted)
Protection grade  

Product Appearance:

Rack-Mounted Type:

Model Compensation
capacity  (A)
System voltage(V) Size(D1*W1*H1)(mm) Cooling mode
YIY AHF-23-0.22-2L-R 23 220 396*260*160 Forced air cooling

Wall Mountedd Type:

Model Compensation
capacity  (A)
System voltage(V) Size(D2*W2*H2)(mm) Cooling mode
YIY AHF-23-0.22-2L-W 23 220 160*260*396 Forced air cooling

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