HARMONIC FILTER COMPENSATION SYSTEMS
Compensation Systems with Harmonic Filters is a compensation type that is widely used in our country and in the world. Its difference from classical compensation is that a harmonic filter reactor is connected in series in front of the capacitor. The purpose of this reactor is to prevent resonance failure between the capacitors and the grid and to improve the energy quality by reducing the harmonic distortions in the system.
WHERE ARE HARMONIC FILTER COMPENSATION SYSTEMS USED?
Before deciding on the use of compensation systems with harmonic filters, harmonic measurement should be made in the facility. Harmonics are measured separately when the classical compensation system operating in the facility is active and disabled; measurement results are compared. If the harmonic distortion rates increase significantly when the classical compensation system is activated, it is appropriate to convert the system to a compensation structure with a harmonic filter.
SELECTION OF HARMONIC FILTER REACTOR
While selecting the harmonic filter reactor, first of all, the filter reactor factor is determined by considering the harmonic measurement results. Filter reactor factor and filter resonance frequency values are given in the table. After the appropriate value is determined, the kVAr power values of the step groups are determined according to the reactive power requirement. It should be noted that the harmonic filter reactor is thermistor protected.
Filter Reactor Factor (p) | Filter Resonance Frequency(fr) | Place of use |
%5,67 | 210 Hz | Plants with high current harmonics, low voltage harmonics |
%7 | 189 Hz | other situations |
%8 | 177 Hz | |
%14 | 134 Hz | Plants with low current harmonics, high voltage harmonics |
For more detailed information, you can download our thesis titled “DESIGN AND ANALYSIS OF HARMONIC FILTER COMPENSATION SYSTEMS IN FACILITIES WITH HARMONIC PROBLEM”, which we prepared during our graduate study at Yıldız Technical University, from the link below.