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Date: 20-09-14

DSP-based harmonic filter for range of power systems

The new EPCOS PQSine series active harmonic filters from TDK are designed for 3-phase networks with and without neutral conductors at voltages from 200 V AC to 480 V AC and 50/60 Hz. PQSine can neutralize harmonics up to the 50th order. The new filter series is available in steps of 60 A up to a maximum rated current of 600 A.

32 bit DSP based PQSine active harmonic filter operates at a scanning rate of 48 kHz. With a reaction time of only 21 µs with newly developed selective drive control (SDC) algorithm which is faster than conventional algorithms based on a fast Fourier transform (FFT). This harmonic filter not only corrects inductive loads but also compensates capacitive reactive power loads and also balance the loads to all phases. The 7-inch or 12.1-inch TFT color touchscreen offers a user-friendly interface for setting parameters and monitoring the operation of the system.

PQSine active harmonic filters are used to improve the power quality in the grid. Key applications thus include frequency converters, UPS systems, data centers and production equipment in the semiconductor industry as well as photovoltaic systems and wind turbines. PQSine filters are also suitable for use in office buildings and shopping centers.

Main applications:
Filtering and compensation of power installations
Industrial electronics applications such as frequency converters UPS systems, data centers, and semiconductor production equipment as well as photovoltaic systems and wind turbines
Office buildings and shopping centers

Main features and benefits:
Filtering of harmonics up to the 50th order
Balancing of loads to all phases
Modular system available in steps of 60 A
Compensation of inductive and capacitive loads

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