1. Pontifícia Universidade Católica do Rio Grande do Sul Laboratório de Eletrônica de Potência – LEPUC
TIME DOMAIN SMPS EQUIVALENT MODEL IDENTIFICATION MODELAGEM E IDENTIFICAÇÃO DE CARGAS ELETRÔNICAS NO DOMÍNIO TEMPO
Presenter: Dr. Ing. Fernando Soares dos Reis
Paulo Ribeiro; Guilherme Alfredo Dias; Marcos Telló; Vicente Mariano Canalli; Júlio César Marques de Lima; Uiraçaba Sarmanho; Reinaldo Tonkoski Jr.; Raphael Ronald de Souza; Gert Bolten Maizonave;
Gabriel Bartz Ceccon e Fabiano Adegas;
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2. Table of Contents INTRODUCTION OBJECTIVES
NONLINEAR LOADS BASIC TOPOLOGY
BRIDGE RECTIFICIER MODELING
ESTIMATION PROCESS
EXPERIMENTAL RESULTS
CONCLUSIONS
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3. INTRODUCTION
The mains supplies several kinds of loads with different applications in…
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4. INTRODUCTION
Residential Environments
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5. INTRODUCTION
Commercial Environments
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6. INTRODUCTION
Industrial Environments
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7. INTRODUCTION The most electronic equipments represents nonlinear loads
Associated topology: full-bridge rectifier with a filtering capacitor;
 OUTCOME: This nonlinear feature leads to mains harmonic distortion and affects the power quality;
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8. Table of Contents INTRODUCTION; OBJECTIVES;
NONLINEAR LOADS BASIC TOPOLOGY;
INPUT INDUCTOR AND CAPACITIVE FILTER FULL- BRIDGE RECTIFICIER MODELING;
ESTIMATION PROCESS;
EXPERIMENTAL RESULTS;
CONCLUSIONS;
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9. OBJECTIVES Essencial Purpose
To develop an estimation method to determine the equivalent components values in the most of electronic equipments;
To identify the values for the EMI filter input inductance Ls, the filtering capacitance CCF and the equivalent load connected to the rectifier;
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10. OBJECTIVES Resulting Process
To analyze the voltage and current waveforms obtained from an oscilloscope in the input of the equipment under measure;
To process the resulting data through a time domain mathematical analysis to estimate the desired parameters;
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11. OBJECTIVES Resulting Process
Modeling and simulation of the complex systems in the time domain through commercial simulators;
To evaluate the influence of the loads over the mains harmonic distortion and power quality;
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12. OBJECTIVES
This analysis process was performed in PUCRS Engineering Faculty Building
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13. Table of Contents INTRODUCTION OBJECTIVES
NONLINEAR LOADS BASIC TOPOLOGY
INPUT INDUCTOR AND CAPACITIVE FILTER FULL- BRIDGE RECTIFICIER MODELING
ESTIMATION PROCESS
EXPERIMENTAL RESULTS
CONCLUSIONS
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14. NONLINEAR LOADS BASIC TOPOLOGY
FULL-BRIDGE RECTIFIER WITH BULKY CAPACITOR CF
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15. NONLINEAR LOADS BASIC TOPOLOGY
Rectifier waveforms
■ Mains Voltage ■ Ouput Voltage ■ Input Current
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16. NONLINEAR LOADS BASIC TOPOLOGY
Some mathematical considerations
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17. Table of Contents INTRODUCTION OBJECTIVES
NONLINEAR LOADS BASIC TOPOLOGY
FULL- BRIDGE RECTIFICIER MODELING
CALCULUS PROCESS
EXPERIMENTAL RESULTS
CONCLUSIONS
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18. FULL-BRIDGE RECTIFIER MODELING
Equivalent Circuit for Mains Linear Analysis (diodes ON)
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19. FULL-BRIDGE RECTIFIER MODELING
Circuit Currents
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20. FULL-BRIDGE RECTIFIER MODELING
Second-order linear ordinary differencial equation
capacitor voltage
mains current
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21. FULL-BRIDGE RECTIFIER MODELING
Resulting Outputs: Capacitor voltage and input current
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22. FULL-BRIDGE RECTIFIER MODELING
Laplace Transform Analysis: resulting coefficients
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23. Distorção de Corrente x Distorção de Tensão
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24. Table of Contents INTRODUCTION OBJECTIVES
NONLINEAR LOADS BASIC TOPOLOGIES
BRIDGE RECTIFICIER MODELING
ESTIMATION PROCESS
EXPERIMENTAL RESULTS
CONCLUSIONS
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25. ESTIMATION PR0CESS Measurements Obtained Parameters Vo = 125 VRMS
f = 60 Hz
VCO = 149,4 V
P =2242,22W
Ip = 50,9 A
Imed = 14,26 A
Veip = 159 V
tp = 2,7 ms
tD on = 4,16 ms
Vo – RMS Mains Voltage
f – Mains Frequency
Vco – Mains Instantaneous Voltage
at conduction initial moment
P – Input Power
Ip – Maximum Input Current
Imed – Output Current Average
tp – Time interval between the instant
t=0 and the current peak
tD on – Rectifier diodes conduction
time interval
Veip – Mains voltage value in the
mains current peak
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26. ESTIMATION PR0CESS Analysing the resulting data Real Values
Estimated Values
R = 11,0 Ω
Req = 11,027 Ω
C = 3300,0 F
Ceq = 3347,0 F
L = 1000,0 H
Leq = 1003,0 H
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27. Table of Contents INTRODUCTION OBJECTIVES
NONLINEAR LOADS BASIC TOPOLOGIES
INPUT INDUCTOR AND CAPACITIVE FILTER FULL- BRIDGE RECTIFICIER MODELING
ESTIMATION PROCESS
EXPERIMENTAL RESULTS
CONCLUSIONS
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28. EXPERIMENTAL RESULTS
Waveforms resulting from the simulation of the estimated values for the equivalent components
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29. Table of Contents INTRODUCTION OBJECTIVES
NONLINEAR LOADS BASIC TOPOLOGIES
INPUT INDUCTOR AND CAPACITIVE FILTER FULL- BRIDGE RECTIFICIER MODELING
ESTIMATION PROCESS
EXPERIMENTAL RESULTS
CONCLUSIONS
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30. CONCLUSIONS
The transmission energy through AC voltage leads to the need for a rectification process that, due to its nonlinear feature, inducts harmonic distortions in the mains affecting the quality energy
This work describes a time domain technique for loads analysis and modeling
This technique intends to estimate, through noninvasive methods, the equivalents resistive and reactive loads connected to the mains permitting a quantitative analysis under its influence in the power quality
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31. Thank You!
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