A Maximum Power Point Tracker with Automatic Step Size Tuning Scheme for Photovoltaic Systems

Table 1

Slope error 𝑒, change in slope error Δ𝑒, and change in duty cycle Δ𝐷 of the 12 categories.

Category number	Slope error category e	Slope error change category 𝑒̇	Duty cycle step size Δ𝐷
1	0<𝑒≤0.00488	−125<𝑒̇≤0	−0.01
2	0.00488<𝑒≤0.03016	−125<𝑒̇≤0	−0.02
3	0.03016<𝑒≤150	−125<𝑒̇≤0	−0.05
4	0<𝑒≤0.00488	0<𝑒̇≤125	−0.01
5	0.00488<𝑒≤0.03016	0<𝑒̇≤125	−0.02
6	0.03016<𝑒≤150	0<𝑒̇≤125	−0.05
7	−0.00446<𝑒≤0	−125<𝑒̇≤0	0.02
8	−0.01095<𝑒≤−0.00446	−125<𝑒̇≤0	0.03
9	−0.1<𝑒≤−0.01095	−125<𝑒̇≤0	0.05
10	−0.00446<𝑒≤0	0<𝑒̇≤125	0.02
11	−0.01095<𝑒≤−0.00446	0<𝑒̇≤125	0.03
12	−0.1<𝑒≤−0.01095	0<𝑒̇≤125	0.05