Introduction of Harmonic Filter

A device used to filter one or more harmonics in power system; most of its structures are composed of inductors, capacitors and resistors, i.e. passive harmonic filters, which also serve as reactive power compensation; the emerging filtering technology also includes active harmonic filters.
It is used to filter harmonics in power system with voltage less than 1000 volts, such as harmonics generated by six-pulse rectifier, also known as harmonic generator.
Based on the principle of electromagnetic induction and reactor, a filter compensation system is composed of high performance filter capacitors connected in series with high linearity filter devices to compensate reactive power while absorbing the main harmonic components of the system. By integrating dynamic reactive power compensation and filtering functions, it can quickly follow the load changes, and has three main functions: restraining current fluctuation, absorbing harmonics of power grid and compensating reactive power.

Three-phase Balance Active Harmonic Filter(AHF)

– PF=0.99 and THDi < 5%
– Compensation for 2- to 50-order harmonics
– Capacitive and inductive reactive power compensation
– Three-phase unbalance co

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