Three-phase Balance Active Harmonic Filter(AHF) Functions:
Meeting users’ requirements:
– PF=0.99 and THDi < 5%
– Compensation for 2- to 50-order harmonics
– Capacitive and inductive reactive power compensation
– Three-phase unbalance co
Three-phase Balance Active Harmonic Filter(AHF) Technical Specifications
| Active Harmonic Filter | |
|---|---|
| Rated input | 400V/690V(-20%-+15%) |
| Power grid frequency | 50Hz/60Hz ( range: ±10%） |
| Parallel operation | Unlimited |
| Overall efficiency | ≥ 97% |
| Power grid structure | 3P3L, 3P4L |
| CT | 150/5 ～ 10,000/5 |
| Performance indicators | |
| Rated capacity | 35A/50A/60A/100A/150A |
| Harmonic compensation | Available |
| Reactive power compensation | Available |
| Unbalance compensation | Available |
| Filtering range | 2 to 50 orders |
| Filtering degree | Adjustable from 2 to 50 |
| Filter performance | THDi< 5% |
| Overall response time | < 10ms |
| Target power factor | Adjustable from -1 to +1 |
| Control algorithms | FFT,Intelligemt, and instantaneous reactive power |
| Switching frequency | 20kHz |
| Noise level | ＜ 60dB |
| Communications and monitoring capabilities | |
| Communications ports | RS485,and network port |
| Communications protocols | TCP/IPPMBus, Modbus, and TCP/IP |
| Module display interface | Touch screen |
| PC software | Optional |
| Protection functions | over-valtage protection, under-voltage protection, short-circuit protection, inverter bridge inverse protection,over-compensation protection, and so on |
| Fault alarm | Available, at most 500 alarm records |
| Monitoring | Independent monitoring and centralized monitoring |
| Mechanical properties | |
| Altitude | 1% up 1500 m. Between 1500 m to 4000 m, according to GB/T3859.2, the power decreases by 1% for every |
| additional 100 m. | |
| Operating temperature | -10℃ ~ +40℃ |
| Relative humidity | 5% to 95%, non-condensing |
| Protection class | IP20 (other IP classes are customizable.) |
Please feel free to contact us, your inquiry will be replied within 24 hours.
Active harmonic filter(AHF) related SEO article – Working principle of active harmonic filter
Active harmonic filter uses current transformer to collect current on DC line. After sampling, the obtained current signal is processed by harmonic separation algorithm, and the harmonic reference signal is obtained as a modulation signal. Compared with triangular wave, the switching signal is obtained. The switching signal is used to control the single-phase bridge. According to the principle of technology, the switching signal of the upper and lower arms is connected back, and the harmonic current equal to the harmonic signal on the line and opposite to the harmonic signal on the line can be obtained, and the harmonic current on the line can be cancelled out. This is the feedforward control part. Then the harmonic component of the line current after the access point of the active harmonic filter is fed back as the input of the regulator to adjust the error of the feedforward control.
Generally speaking, it is based on the principle of capacitance with high frequency resistance and low frequency, inductance with low frequency resistance and high frequency. For high frequencies that need to be cut off, the capacitor absorbs inductance and obstructs it. For low frequencies that need to be cut off, the capacitor has the characteristics of high resistance and low inductance to make it pass.
An ideal filter should have uniform and stable gain in the required frequency band and infinite attenuation outside the passband. However, there are some differences in the actual filter distance, so people use various functions to approximate the frequency characteristics of the ideal filter.
SOROTEC which is a professional active harmonic filter manufacturer in China can be a good choice for you, please feel free to contact us!