Wen Fushuan

A KIND OF GENERALIZED HOPFIELD CONTINUOUS MODEL AND ITS APPLICATION TO THE OPTIMAL DISTRIBUTION OF REACTIVE POWER SOURCES IN POWER SYSTEMS

At first, a kind of new neural network model named Generalized Hopfield Continuous Model is proposed. And then, the behavior and the ability to solve constrained optimization problems via the proposed model are analyzed and discussed. The advantages of the proposed model over the Hopfield Continuous Model are described. Finally, the application of the proposed model to the optimal distribution of reactive power sources in power systems is investigated and formulated. An example is served for illustrations, the result shows the feasibility of the proposed method.

A MODIFIED THREE-PHASE MODEL OF TRANSFORMERS WITH DELTA-CONNECTED WINDINGS

ABSTRACT The currently used three—phase models [1-3] of transformers with delta—connected windings may lead to three—phase fundamental and harmonic bus admittance matrices of power systems with singularity, which may result in incorrect results or inability to carry out three—phase fundamental and / or harmonic load flow solutions. In order to solve this problem, this paper presents a modified model to keep the admittance matrices from singularity. Several samples and actual systems have proved the correctness and efficiency of the proposed model.