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Active Harmonic Filters

Harmonic control, Reactive power compensation, Three-phase unbalance control

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AC charging pile, DC charging pile, charging accessories

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Product Description

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, com pact, 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 demand ing 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.

AHF 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.

AHF Technical Specifications

TYPE	Series 220V	Series 400V	Series 500V	Series 690V
Max neutral wire current	23A	15A 、25A 、50A、 75A 、100A 、150A	100A	100A
Nominal voltage	AC220V(-20%~+20%)	AC380V(-20%~+20%)	AC500V(-20%~+20%)	AC690V(-20%~+20%)
Rated frequency	50Hz±5%
Network	Single phase	Three-phase three-wire/three-phase four-wire
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	/	The filtering capacity of three-phase four-wire neutral line is 3 times of that of phase filtering
machine efficiency	>97%
Switching frequency	32kHz	16kHz	12.8kHz	12 .8kHz
Feature selection	Deal with harmonics/Deal with harmonics and reactive power	Deal with harmonics/Deal with harmonics and reactive power/ Deal with harmonics and three-phase unbalance /Three options
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	<60dB	<65dB
Installation	Rack/wall hanging		Rack
Into the way of line	Back entry (rack type), top entry (wall-mounted)		Top entry
Protection grade	IP20

Type Code

AHF Product Appearance

Model Range

Model	Compensation capacity (A)	System voltage(V)	*Size(D1W1H1)(*mm)	Cooling mode
AHF-23-0.22-2L-R	23	220	396×260×160	Forced air cooling
AHF-50-0.4-4L-R(Compact)	50	400	515×510×89	Forced air cooling
AHF-75-0.4-4L-R	75	400	546×550× 190	Forced air cooling
AHF-100-0.4-4L-R	100	400	586×550×240	Forced air cooling
AHF-150-0.4-4L-R	150	400	586×550×240	Forced air cooling
AHF-100-0.5-4L-R	100	500	675×495×275	Forced air cooling
AHF-100-0.69-4L-R	100	690	735×539×275	Forced air cooling

*The table is the standard specification, if you need other sizes, please contact us for customization

Model Range

Model	Compensation capacity (A)	System voltage(V)	*Size(D2W2H2)(mm)*	Cooling mode
AHF-23-0.22-2L-W	23	220	160×260×396	Forced air cooling
AHF-50-0.4-4L-W(Compact)	50	400	89×510×515	Forced air cooling
AHF-75-0.4-4L-W	75	400	190×513×599	Forced air cooling
AHF-100.-0.4-4L-W	100	400	240×600×597	Forced air cooling
AHF-150-0.4-4L-W	150	400	240×600×597	Forced air cooling
AHF-100-0.5-4L-W	100	500	275×495×675	Forced air cooling
AHF-100-0.69-4L-W	100	690	275×539×735	Forced air cooling

*The table is the standard specification, if you need other sizes, please contact us for customization

Model Range

Model	Compensation capacity (A)	System voltage(V)	*Size(D3W3H3)(mm)*	Cooling mode
AHF-100-0.4-4L-C	100	400	Cabinet 1/ Cabinet 2 optional	Forced air cooling
AHF-150-0.4-4L-C	150	400	Cabinet 1/ Cabinet 2 optional	Forced air cooling
AHF-200-0.4-4L-C	200	400	Cabinet 1/ Cabinet 2 optional	Forced air cooling
AHF-250-0.4-4L-C	250	400	Cabinet 1/ Cabinet 2 optional	Forced air cooling
AHF-300-04-4L-C	300	400	Cabinet 1/ Cabinet 2 optional	Forced air cooling
AHF-400-0.4-4L-C	400	400	Cabinet 1/ Cabinet 2 optional	Forced air cooling
AHF-300-0.5-4L-C	300	500	Cabinet 1	Forced air cooling
AHF-300-0.69-4L-C	300	690	Cabinet 1	Forced air cooling