Abstract-This paper presents an adaptive controller for single-phase grid-connected photovoltaic inverter under abnormal grid conditions. The main problem associated with the controllers of the grid-connected inverter is that they are tuned for some assumed values of the electrical grid parameters. However, when the parameters, such as voltage and frequency are changed or the grid is subjected to uncertain distortion, these controllers unable to track those variations of the grid parameters and handle the output power within the allowable limit. To overcome such problem, a suitable control strategy is proposed, which is based on frequency adaptive current control and an accurate grid detection. For validity confirmation, a controlled 3KW system, with specific features was designed and simulated. The simulation results confirmed that the strategy is an effective way of control.
Power Quality (PQ) has become a big issue since the late 1980s. Equipments which are in use nowadays, require good power quality. However, the pure sinusoidal voltage or current waveform is distorted by the nonlinear properties of the equipments. The main purpose of this paper is to investigate the most common problems in power quality in educational buildings and propose a solution for the main dominate one. The Point of Common Coupling (PCC) was elected to be an incomer breaker. The study includes monitoring and measuring the power waveform for one week. The result are analyzed and compared with International Standards. Interruptions are the main problem while swells, dips and transients problems are caused as a result of the interruptions problems.
Power Quality (PQ) has become a big issue since the late 1980s. Equipments which are in use nowadays, require good power quality. However, the pure sinusoidal voltage or current waveform is distorted by the nonlinear properties of the equipments. The main purpose of this paper is to investigate the most common problems in power quality in educational buildings and propose a solution for the main dominate one. The Point of Common Coupling (PCC) was elected to be an incomer breaker. The study includes monitoring and measuring the power waveform for one week. The result are analyzed and compared with International Standards. Interruptions are the main problem while swells, dips and transients problems are caused as a result of the interruptions problems.
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.