During ground faults, fault current flows in the ground which results in potential gradient and ground potential rise (GPR). The potential gradient affects the safety of operating person due to step and touch voltage and GPR affects the insulation of protective devices and control cables. The potential gradient and GPR are the functions of ground electrode geometry. In this paper, performance assessment and analysis of grounding grid is carried out for different types of grid electrodes with two layer soil model for both positive and negative reflection factor K. The simulation is carried out to evaluate grounding grid performance indices such as Ground
Analysis of PQ (Power Quality) signals for detecting PQ disturbances are one of the major challenging techniques being explored by many researchers. It becomes important to understand the causes of electronic equipment being damaged due to power disturbances, for this purpose there is need for reliable algorithm that can work for PQ analysis. First step towards PQ analysis is generation of PQ disturbances. In this work, the different models for power quality disturbances are developed using MATLAB Simulink. These models include three phase fault and switching of large load to simulate voltage sag, removing of large loads from system to simulate voltage swell, three phase nonlinear load to simulate harmonics at the load side, switching of large capacitor bank to simulate voltage transient at the transmission bus, connecting three phase dynamic load to simulate voltage fluctuations, switching unbalanced load on three phases to simulate unbalance in voltage, permanent three phase fault to simulate interruption, and converter with a source impedance to simulate notches. Simulink models are given and results are presented.
In this paper, optimal capacitor sizing and placement method was used to improve energy efficiency. It involves the placement of capacitors in a specific location with suitable sizing based on the current load of the electrical system. The optimization is scenario where the sizing and placement of the capacitors are made dynamic and vary based on the present load of the system. PSO AI technique have been implemented for real analysis. The optimization technique reduce the power losses determining the location and size of the capacitors. MATLAB and SIMULINK develop the optimization program and electrical distribution model. The three system model have been used for testing the effe deployed at the UiTM Science and Technology Tower (Block 4).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.