Voltage Stability Assessments and Their Improvement Using Optimal Placed Static Synchronous Compensator (STATCOM)
Algorithms
(1)
Define control variables with allowable ranges and appropriate PSO parameter values, as well as input data for the transmission lines and buses.
(2)
Take iter = 0
(3)
Generate the population of particles and their velocities randomly.
(4)
Run NR load flow for each particle to calculate power losses and voltage performance index.
(5)
Compute the objective function of each particle using equation (23).
(6)
Calculate the personal best (Pbest) of all particles and the global best (Gbest) of all particles from their objective function.
(7)
Iter = iter + 1
(8)
Compute the velocity of each particle using equation (19) and adjust it if its limit gets violated.
(9)
Update the position of each particle using equation (20).
(10)
Compute the objective function of each particle using equation (23).
(11)
For each particle, if the personal best of current fitness (P) is better than the P best of previous fitness, then P best = P.
(12)
Set Pbest and Gbest to their best.
(13)
Go to step number 7, until the maximum number of iterations is completed.
(14)
Gbest particle coordinates give optimized values of control variables and their fitness gives minimized values of power losses and voltage magnitude within the standard limit.
