The large-scale application of various non-linear electronic equipment devices such as inverters, rectifiers, and various switching power supplies in the modern industrial manufacturing industry has perfected the modern industrial automatic control technology and also generated a large number of harmonics. Compared with the traditional DC speed regulation, the frequency converter can realize the stepless speed regulation of the AC motor, meet the requirements of the motor speed control of the production process, to improve the output and quality of the product, and can greatly save energy and reduce production. cost. However, whether it is DC speed regulation or AC speed regulation technology, the rectifier circuit is adopted in the electrical design, which brings serious harmonic pollution to the system. Equipment such as inverters is the main source of harmonics, and its harmonic content is about 40%.

1. Centralized management: DBL- ATP7 series reactive power compensation device + DBL-APF series active filter

Terminal local management: DBL-PQ terminal power quality device + DBL-NP series neutral line security energy-saving device

2. Centralized management: DBL- ATP7 series reactive power compensation device + DBL-SVG static var generator + DBL-APF series active filter (DBL-ATP7 mixed with SVG)

Terminal local management: DBL-PQ terminal power quality device + DBL-NP series neutral line security energy-saving device

3. (Recommended) centralized management: DBL-SVG static var generator + DBL-APF series active filter

Terminal local management: DBL-PQ terminal power quality device + DBL-NP series neutral line security energy-saving device