In this paper, the wind energy system (WES) is interfaced with the grid system using a permanent magnet synchronous generator (PMSG) with robust control of terminal sliding mode controller (SMC) is proposed. In this system, voltage source inverter (VSI) with three phases has connected in grid side using less resistive losses of LCL filter but without using grid connection transformer. The ZETA converter is utilized to develop the voltage of DC link wind system connected rectifier. The high voltage gain is achieved by using the PWM switching signals for the converter. The grid side VSI is used to provide the reliable, efficient and supplying secure with the power, and it is controlled using the control strategy of terminal sliding mode controller (TSM). The proposed system results are verified, and the TSM control’s achievement is based on VSI, which is connected in the grid side validated using MATLAB/Simulink.
To have a comprehensive review on the different SST topologies and analyses its application suitability. Presently different topologies of SST exist. Each topology has its own relative advantages which makes it suitable for specific applications. An analysis of the different topologies and its merits making it suitable for different areas of application is discussed in detail. A simulation of A Single Stage and a Three Stage SST topology are simulated in MATLAB and the results are discussed in this paper. The review clearly evolves the relative merits of SST over conventional transformers, the losses and efficiencies of SST seems to be very much acceptable in comparison to a conventional transformer. The advantages of various topologies namely Matrix type, Isolated back-end type, Isolated front-end type, Isolated modular multilevel converter and single cell makes its suitable for applications in AC dual active bridge, Traction, Electric Vehicles, Renewable Energy Sources. These topologies are less complex and offer high flexibility. SST has the main feature of reduced size, weight and volume, high power density, higher efficiency, fault isolation, reactive power compensation and improved power factor which makes it adaptable for various applications.
Solid State Transformers (SST) are based on power electronic compoenents. They operate at very high frequency thereby possesing reduced size and volume. Their high frequency operation is realized through power conversion stages in the dual active bridge (DAB). These transformers are aimed for power quality enhnacemnt. A novel two winding SST driven by fuzzy logic is proposed in this paper. The proposed SST has been simualted and analyzed through MATLAB/Simulink. The simulation results infer that the proposed SST scheme mitigated voltage sag, swell and provided better THD thereby improving the power quality of the system.
As a solution to mitigating rising energy needs, microgrids (MG) have arisen. But instead of microgrids are focused mainly on unconventional sources of energy. In their service, there is significant variability. Energy users will not know if their estimated load is long or short related to historical records. This paper aims to formulate a robust energy prediction of consumption in the microgrid system that uses random forest (RF) method theory as the mathematical framework. Effective MG energy forecast plays an essential role in power improvement MG efficacy. Comparing RF models with various parameter configurations and examining the parameters setting affects the model’s estimation efficiency.
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