HKK-AHFG active harmonic fitler panel is a new product of Shanghai Huakun Electric Co., Ltd.

Active harmonic fitler panel, also known as active filter, is a power electronic device used to dynamically suppress harmonics and compensate for reactive power. Active harmonic fitler panels can compensate for harmonics that vary in size and frequency, as well as for varying reactive power. Mainly used in communication industry, semiconductor industry, petrochemical industry, chemical fiber industry, theater, automobile manufacturing, etc.

The loads that generate harmonic currents in the system power grid are mainly various power electronic devices, transformers, electric arc furnaces and fluorescent lamps. Before the widespread application of power electronic devices, the harmonic current mainly came from the excitation current of the power transformer. After a large number of applications in power electronic devices, it has become the most important source of harmonics.

Active harmonic fitler panel can be divided into two parts, harmonic current detection circuit and compensation current control circuit. The harmonic current detection circuit detects the harmonic current in the load in real time, and accordingly, the compensation current control circuit obtains the command signal to control the converter to generate the required compensation current. According to the way the converter of the active power filter device is connected to the power grid, it can be divided into two categories: parallel type and series type.

Parallel-type active harmonic fitler panels are suitable for compensating current-type harmonic sources, similar to rectifiers with direct inductive loads, but for rectifiers with large capacitance filtering on the DC side, the compensation effect is limited by the compensation capacity and filter capacitor impedance. limits.

The active harmonic fitler panel adopts a drawer structure, which can accommodate 5 HKK-AHFs working in parallel to increase the compensation capacity. The touch screen in the cabinet adopts a centralized control method to monitor the running status of multiple AHFs and complete the parameter setting function. The capacity of a single cabinet can reach 500A, which can solve the problem of high harmonic content in most industrial sites.

Active harmonic fitler panel is suitable for petrochemical, metallurgical steel rolling, light industry and textile, communication and telecommunication, precision instrument manufacturing and other industries. It is used to filter out AC 50~60Hz, 400V power distribution system. It is mainly used to filter out the 2~50th harmonic current in the low-voltage power distribution system, while improving the power factor and reducing the interference of harmonics to the power system.