A Fuzzy Controller Using Three Level-inverter based DSTATCOM

Nowadays, the improvement of power factor has becoming increasingly concerned by the electric power utilities. There are many problems that affect the power quality and the performance of the equipment at consumer such as voltage sags or voltage dips, voltage imbalance, waveform distortion, voltage fluctuations and frequency. The improvement of power quality and the control of networks can be obtained by the implementation of the new devices technologies naming FACTS. Thus, the uses of device such as Distribution Static Compensator (DSTATCOM) can solve many problems in the electrical networks. The DSTATCOM is a source based on semiconductor capable of supplying or absorbing of reactive power in network. It used for correcting power quality problems in distribution systems. Because of limitation of use of conventional two-level inverter based DSTATCOM in the field of high power applications, we used the multilevel inverter. In this paper we will develop the space vector modulation algorithm me technique in the case of the three level inverter. To validate the theory and models presented in this paper a structured simulation is executed in the simPowerSystems of MATLAB/Simulink.