Capacitors in an Harmonic-Rich Environment

Capacitor banks have been used for many years to compensate the fundamental reactive power required by resistive-inductive loads. They are essential for an economic operation of the electrical system. However, non-linear loads are becoming predominant in today’s electricity system. Capacitor banks now have to be designed to cope with two basic challenges those non-linear loads bring about. They have to withstand excess harmonic current, and they have to avoid the risk of resonance with inductance’s in close (electrical) proximity. This Guide identifies the optimal approach to prevent these problems when selecting new, and upgrading existing, capacitor banks. It also discusses whether local dispersed compensation, close to the inductive appliances, or centralized compensation, at the point of common coupling, is to be preferred.

Application Note Author & Publisher: Leonardo ENERGY

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