Optimal power quality meters placement for harmonic state estimation with double contingencies in power systems

In this paper, a methodology is presented for optimal placement of Power Quality meters forýHarmonic State ýEstimation. Single line and meter loss ýcontingencies are also considered in placement problem. For Harmonic State ýEstimation in proposed method, an optimization problem for minimization the sum of the squares of the difference between the measured and estimated values is solved. Mean Square ýErrors of estimated Total ýHarmonic Distortions in normal condition is selected as the cost function, while single line and meter loss ýcontingencies are also considered by formulating ýa multi-objective optimization exercise. To ýsolve this optimization problem, a SOA ýalgorithm based on Pareto optimum method is used. Simulationýýare performed on an IEEE 14-bus test system to demonstrate the effectiveness ýof the proposed ýmethodologyý.ý