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120             Renewable Energy Devices and Systems with Simulations in MATLAB  and ANSYS ®
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                                        Constant- Power   Operation  Very difficult  Easy  Easy  Easy  Easy  Easy in most cases








                                  Comparison of the Operational Characteristics of the Global MPPT Methods for Nonuniform Solar Irradiation Conditions
                                      System or   Expert   Knowledge  High  Low  Low  Low  High  High in most   cases







                                        Sampled   Parameters  PV voltage   and current  PV voltage   and current  PV voltage   and current  PV voltage   and current  PV voltage   and current  PV voltage   and current





                                          Efficiency  High  Low  Low  Low  Very high  Low




                                        To Aging of the   PV Modules  Depends on the   type of MPPT   method   employed  Method   dependent



                                     Robustness  Low  High  High  High


                                        To External   Disturbances  Low  Low  Low  Low  High  Method   dependent







                                          Complexity                      Method dependent


                                             High  High  Low  High  Very high


                                          Sampling Rate  High  High  High  High  Low  High









                               TABLE 5.3  MPPT Method  PV array   reconfiguration  Evolutionary MPPT   algorithms  Numerical   optimization  Stochastic/  chaos-based   algorithms  DMPPT  Other global MPPT   methods
   128   129   130   131   132   133   134   135   136   137   138