Optimization of Impedance Matrix in Power Flow Calculation by Pattern Search

The power flow calculation based on Newton-Rafferson method contains the problem of poor convergence when using to calculate the distribution network. The method based on Pattern Search is an effective solution to this problem. This method is simple and effective, easy to implement, but there are disadvantages of large computation. This paper optimized the inverse process of admittance matrix, which made the calculation of the method was greatly reduced, has greatly improved the practicality of this method.