Research Article
A New Hybrid Nelder-Mead Particle Swarm Optimization for Coordination Optimization of Directional Overcurrent Relays
Algorithm 1
Pseudocode of the proposed hybrid NM-PSO algorithm.
1. Initialization. Generate a population of size N (N > (n + 1)). | Repeat | 2. Constraint handling method | 2.1 The Gradient Repair Method. Repair particles that violate the constraints by | directing the infeasible solution toward the feasible region. | 2.2 Identify solutions (that fulfill the constraint conditions) and arrange them in the | order of good to bad. | 3. Nelder-Mead Method. Apply NM operator to the top n + 1 particles and update the | (n + 1)th particle. | 4. PSO Method. Apply PSO operator for updating the particles. | 4.1 Selection. Select the global best particle and the neighborhood best particle from | the population. | 4.2 Velocity Update. Apply velocity updates to the particles | until the condition is fulfilled. |
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