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Anhui Zhongdian (ZDDQ) Electric Co., Ltd.

Anhui Zhongdian (ZDDQ) Electric Co., Ltd.
NO.25,JINHE RD,HUAIYUAN ECONOMIC DEVELOPMENT ZONE ,
BENGBU ,
Anhui Province
China
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ZDDQ - Model 3P4L - Active Power Filter APF Panels

- Model 3P4L - Active Power Filter APF Panels

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The ZDDQ Active Harmonic Filter (APF) serves as an advanced solution for addressing power quality issues within power grids, including harmonic disturbances, reactive power, and phase load imbalances. This sophisticated device connects in parallel with non-linear loads, utilizing cutting-edge FFT algorithms in DSP microchips to detect and cancel out harmonic currents by generating compensating currents with equivalent amplitude but opposite phase angles. The APF also improves the power factor and corrects load imbalances by dynamically filtering harmonic waves without being influenced by grid structure or load type, thereby preventing harmonic oscillation. The filter can effectively compensate for harmonics up to the 50th order and offers fast reactive power compensation for inductive and capacitive loads. Key technical specifications include rated voltages between 308V to 480V, current ranges from 30Amp to 600Amp per cabinet, and a harmonic filtering efficiency of up to 98%. Additionally, the system boasts features like Ethernet and EtherCAT connectivity, user-friendly HMI interfaces, and a modular, compact design, making it suitable for industrial installations demanding high reliability and minimal harmonic interference.

Details

Active Power filter is connected in parallel with non-linear loads, and uses one set of CT to detect the load current. It calculates each order harmonic current by FFT algorithms in its DSP microchips, and then generates a compensating current with the same amplitude but opposite phase angles to the detected harmonic current, which cancels out the original load harmonics.Not only eliminates harmonic current from the load side, but it also mitigates harmonic voltage caused by harmonic currents. The APF system can also improve power factor (PF) and correct load imbalances in the power system.

  • Brand: ZDDQ
  • Item No.: ZD-AMS
  • Payment: T/T,L/C
  • Product Origin: China
  • Color: RAL7035
  • Shipping Port: Shanghai
  • Lead Time: 15days

Overview of Active Power Fitler

ZDDQ active power filter(APF 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 Power 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. The operation of APF 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.

Active Power Fitler can also realize dynamic reactive compensation, and control the capacitor switching, to improve the power factor of power grid. Meanwhile, APF has the function of controlling the 3 phase load current unbalance, thus comprehensively solving various power quality problems with power grid.

APF Specification

  • Rated Voltage : AC 308V-480V
  • Electric Connection : 3P3W/3P4W
  • Rated Frequency : 50Hz (60Hz) +/- 10%
  • Rated Current per Module : 30Amp,50Amp, 75Amp, 100Amp,150Amp
  • Rated Current per Cabinet  : 30~600Amp (module combination)
  • Redundancy : Each module is an independent filtering system
  • Harmonic Elimination Range  : 2nd ~ 50th order (Selectable)
  • Compensation Mode : Compensate Harmonics,Reactive Power,Phase imbalance
  • Harmonic Filtering Performance : Filter up to 98% harmonics at rated load
  • THDv/THDi : THDv<3%, THDi<5% after filtering
  • Reactive Power Compensation Capability  : Both inductive and capacitive reactive power compensation
  • Imbalance Correction Capability  : Mitigate negative and zero sequence
  • Full Response time  : <5ms
  • Instant Response time : <100us
  • Thermal Loss : ≤3% of AHF rated capacity (kVA)

APF Principles

Active Power filter is connected in parallel with non-linear loads, and uses one set of current transformers (CT) to detect the load current. It calculates each order harmonic current , and then generates a compensating current with the same amplitude but opposite phase angles to the detected harmonic current, which cancels out the original load harmonics.
Active Power Filter not only eliminates harmonic current from the load side, but it also mitigates harmonic voltage caused by harmonic currents. The APF system can also improve power factor (PF) and correct load imbalances in the power system.

APF Benefits

  • Ultra-fast reactive power compensation(Inductive and capacitive).
  • Harmonic Compensation up to 50th harmonic(Individual selectable).
  • Load balancing between phases and unloaded neutral wire.
  • Flicker compensation.  
  • Reduce overheating/Reduce nuisance tripping/Reduce overloading/Reduce equipment failure.
  • Improve Reliability.    
  • Compact Design and Modular system.
  • Grid resonance detection.
  • User-friendly HMI menu operation.
  • Ethernet and ethercat system for interconnection.
  • High performance and reliability.
  • Insensitive to network/grid conditions.
  • Simple installation.

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