Publicación: STUDY AND IMPLEMENTATION OF A SELECTIVE DETECTION OF HARMONICS USING A PLL-BASED ALGORITHM
Fecha
2019
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2018 IEEE INTERNATIONAL CONFERENCE ON AUTOMATION/XXIII
Resumen
POWER ELECTRONIC LOADS ARE SOURCES OF UNWANTED HARMONIC AS WELL AS REACTIVE POWER. PASSIVE POWER FILTERS AND ACTIVE POWER FILTERS ARE A SUITABLE SOLUTION FOR THOSE POWER QUALITY ISSUES. IF ACTIVE POWER FILTERS ARE USED, THEN IT CONTROLS SYSTEMS NEED TO MEASURE OF HARMONIC AND REACTIVE POWER TO COMPENSATE IT THROUGH A CONTROLLED CURRENT OR VOLTAGE SOURCE. THUS, IT IS IMPORTANT TO DETERMINATE BOTH, FUNDAMENTAL COMPONENT AND HARMONICS COMPONENTS FOR THE ELECTRIC VARIABLE TO BE COMPENSATED. FURTHERMORE, IF THE DESIGN USES A MODULAR APPROACH WITH SEVERAL ACTIVE FILTERS COMPENSATING DIFFERENT HARMONICS THEN THE VALUE OF EACH HARMONIC IN REAL TIME IS REQUIRED. THIS WORK PRESENTS A METHOD TO FIND THE HARMONIC COMPONENTS OF SIGNAL BASED ON A ROBUST PLL WHERE A SINUSOIDAL BASE IS BUILT AND USED TO FIND THE FOURIER COEFFICIENTS FOR THE SELECTED HARMONICS. SIMULATED AND EXPERIMENTAL RESULTS ARE PRESENTED TO VALIDATE THE THEORETICAL CONSIDERATIONS.
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Palabras clave
Phase-Lock Loop strategy, Harmonic Detection, digital signal processing, Detection
