Newton Raphson Load Flow Method Research Articles

Fast and exact line reclosing analysis technique

This paper introduces a fast and exact method for line reclosing analysis. The new method is based on the corollary of the shift theorem and on the reasonable assumption of decoupling. The reclosed system state is obtained through an intermediate system state calculation with only real power redistribution. The validity of the proposed method was tested by its application to the standard IEEE 30-bus test system and the solution compared with the results obtained by the Newton-Raphson load flow method.

拡張複素数領域におけるニュートン・ラフソン形潮流計算法

拡張複素数領域におけるニュートン・ラフソン形潮流計算法

A NOVEL METHOD FOR FILTERING AND RANKING OF CRITICAL CONTINGENCIES

ABSTRACT A reliable and simple method is presented in this paper for filtering and ranking of critical contingencies. Infinite norm is used for filtering of critical contingencies and performance indices which reflect transmission line overloads, load voltage levels and generator reactive capabilities are used to rank the identified critical contingencies in a decreasing order of severity. Secondary outages are also included in the proposed method. Outage simulation technique is used to simulate the outage of a line or a transformer. A constant sensitivity matrix which is the inverse of the constant Jacobian of the modified Newton-Raphson load flow method is used in these studies. The proposed technique has been validated by testing it on various test systems and relevant results are presented

Starting algorithm and modification for Newton-Raphson load-flow method

A starting algorithm for the Newton-Raphson method of load-flow calculation is proposed. The algorithm provides good starting values for the system variables by defining two new functions, the coupling between which is weaker than the coupling between the normal active and reactive power mismatch functions. A modification to the Newton-Raphson method is also proposed that takes into account most of the 2nd-order terms that are normally neglected. Results of systems solved by the standard Newton-Raphson and other methods, and by the modified method with the new algorithm incorporated, demonstrate the advantages of the proposed algorithm and modification.