Table 2 The parameters characteristics and values of the HHO algorithm.

From: Improvement of power quality parameters using modulated-unified power quality conditioner and switched-inductor boost converter by the optimization techniques for a hybrid AC/DC microgrid

Parameter

Symbol

Value

Random number

\({q}_{1}\)

[0, 1]

Next position of the Harris hawk

\({H}_{t}+1\)

Random position of the hunter

\({H}_{rand}\)

Current position of the hawk

\({H}_{t}\)

Average position of all falcons

\({H}_{mean}\)

Hunting position

\({H}_{prey}\)

Number of iterations

t

50

Random numbers

\({r}_{1}..,{r}_{4}\)

[0, 1]

Maximum number of iterations

T

55

Lowest bound

LB

Highest bound

UB

Escape energy

R

[− 2, 2]

Initial energy

\({R}_{0}\)

[− 1, 1]

Prey force for random jumps

J