Maximum Power Point Tracking Method Based on Modified Particle Swarm Optimization for Photovoltaic Systems

Table 2

Comparison of the tracking success rates for the conventional and modified PSO methods.

MPPT methods	Module array configuration and shade conditions
	Four-series one-parallel: one module with 30% shading and one module with 55% shading	Four-series one-parallel: one module with 25% shading and one module with 30% shading	Two-series two-parallel: one module with 25% shading and one module with 30% shading	Four-series one-parallel: no module shading
Conventional PSO method	75/100 attempts*	72/100 attempts	71/100 attempts	(i) With weight set to 0.4: 49/100 attempts; (ii) With weight set to 0.7: 100/100 attempts
Modified PSO method	100/100 attempts	100/100 attempts	100/100 attempts	100/100 attempts

∗Note: Number of successes/total number of attempts.