A Transformer less Upfc with Artificial Neural Network Controller

Abstract

Now a day’s FACTS devices are used to control the flow of power, to increase the transmission capacity and to improve the stability of the power system. One of the most commonly used FACTS devices is Unified Power Flow Controller (UPFC)In this paper, a modulation and control method for the new transformer less unified power flow controller (UPFC) is presented. To overcome the problems with transformers, a completely transformer less UPFC based on an innovative configuration of two cascade multilevel inverters has been proposed. The new UPFC offers several advantages over the traditional technology, such as transformer less, light weight, high efficiency, low cost and fast dynamic response. This paper focuses on the modulation and control for this new transformer less UPFC, including artificial neural networks(ANN) controlling for low total harmonic distortion and high efficiency, independent active and reactive power control over the transmission line, dc-link voltage balance control, etc. Both the steady-state and dynamic response results will be shown in this paper. UPFC on controlling the flow of power and the effectiveness of controllers on the performance of UPFC is used to simulate UPFC model and to create the ANN.