Abstract
Aiming at the power quality problem existing in the distribution network, this paper proposes a multi-objective optimization configuration strategy based on firefly algorithm. The power quality index is evaluated by three indexes of voltage deviation, harmonic current and three-phase unbalance degree through the analytic hierarchy process and entropy weight method. Active power filter, intelligent capacitor and commutation switch are used to control the three indexes respectively. Taking the cost economy and power quality optimization effect as the optimization objective, and satisfying the relevant power quality standards as the constraint condition, the optimal configuration scheme is obtained by firefly algorithm. A power quality evaluation model is established and a simulation model based on IEEE-33 node distribution system is built. Harmonic, voltage deviation and three-phase unbalanced load are respectively connected to simulate power quality problems. The feasibility and superiority of the optimization strategy are verified by simulation.
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