TIME DOMAIN SMPS EQUIVALENT MODEL IDENTIFICATION MODELAGEM E IDENTIFICA

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TIME DOMAIN SMPS EQUIVALENT MODEL
IDENTIFICATIONMODELAGEM E IDENTIFICAÇÃO DE
CARGAS ELETRÔNICAS NO DOMÍNIO TEMPO

• Pontifícia Universidade Católica do Rio Grande do
  Sul Laboratório de Eletrônica de Potência LEPUC

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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Table of Contents

• INTRODUCTION
• OBJECTIVES
• NONLINEAR LOADS BASIC TOPOLOGY
• BRIDGE RECTIFICIER MODELING
• ESTIMATION PROCESS
• EXPERIMENTAL RESULTS
• CONCLUSIONS

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INTRODUCTION
The mains supplies several kinds of loads with
different applications in
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INTRODUCTION
Residential Environments
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INTRODUCTION
Commercial Environments
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INTRODUCTION
Industrial Environments
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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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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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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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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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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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OBJECTIVES

• This analysis process was performed in PUCRS
  Engineering Faculty Building

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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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NONLINEAR LOADS BASIC TOPOLOGY
FULL-BRIDGE RECTIFIER WITH BULKY CAPACITOR CF
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NONLINEAR LOADS BASIC TOPOLOGY
Rectifier waveforms
Mains Voltage Ouput Voltage
Input Current
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NONLINEAR LOADS BASIC TOPOLOGY
Some mathematical considerations
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Table of Contents

• INTRODUCTION
• OBJECTIVES
• NONLINEAR LOADS BASIC TOPOLOGY
• FULL- BRIDGE RECTIFICIER MODELING
• CALCULUS PROCESS
• EXPERIMENTAL RESULTS
• CONCLUSIONS

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FULL-BRIDGE RECTIFIER MODELING
Equivalent Circuit for MainsLinear Analysis
(diodes ON)
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FULL-BRIDGE RECTIFIER MODELING
Circuit Currents
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FULL-BRIDGE RECTIFIER MODELING
Second-order linear ordinary differencial equation

• capacitor voltage

• mains current

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FULL-BRIDGE RECTIFIER MODELING
Resulting OutputsCapacitor voltage and input
current
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FULL-BRIDGE RECTIFIER MODELING
Laplace Transform Analysis resulting coefficients
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Distorção de Corrente x Distorção de Tensão
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Table of Contents

• INTRODUCTION
• OBJECTIVES
• NONLINEAR LOADS BASIC TOPOLOGIES
• BRIDGE RECTIFICIER MODELING
• ESTIMATION PROCESS
• EXPERIMENTAL RESULTS
• CONCLUSIONS

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ESTIMATION PR0CESS
Obtained Parameters
Measurements
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 t0 and
the current peak tD on Rectifier diodes
conduction time interval Veip
Mains voltage value in the mains
current peak
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ESTIMATION PR0CESS

• Analysing the resulting data

Real Values Estimated Values
R 11,0 O Req 11,027 O
C 3300,0 ?F Ceq 3347,0 ?F
L 1000,0 ?H Leq 1003,0 ?H
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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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EXPERIMENTAL RESULTS
Waveforms resulting from the simulation of the
estimated values for the equivalent components
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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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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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Thank You!