Performance and computational requirements of new piecewise load flow algorithm

The summary discusses the computational aspects and requirements of load flow solution methods. In particular, new piecewise solution technique is considered. In the new algorithm, based on the Newton-Raphson method, the Jacobian is block diagonalised according to chosen subsystems, and the voltage correction vectors of the respective subsystems are solved independently. The effects of interconnections are taken into account using a method of successive approximation. The memory and computational requirements of the new technique are discussed and compared with those of the one-piece solution. The computational requirements are indicated analytically, facilitating examination of the effects of tearing. The number of subdivisions required to minimise computing effort is also indicated.