This active vs passive harmonic mitigation techniques are particularly important in preserving the functioning of various electrical systems. For instance, active harmonic filters employ advanced technology that dynamically eliminates the harmonic currents in real time fashion making their performance efficient. Passive harmonic filters take another route and employ the use of inductors and capacitors in order to absorb certain specific harmonic frequencies. Sustaining either of these methods is largely about operational requirements, economics of budget and the specific attributes of your electrical system.