Abdelnasser Nafeh

Benha University · Department of Electrical Engineering (Benha)

Multi-level inverters give a clear solution to bring the advantages of speed controlled induction motor drive. A nine-level hysteresis based direct torque control was proposed to provide accurate mapping of the torque errors and to prove five-level inverter diode-clamped multi-level inverter (DCMLI) superior performance compared to two-level invert...

To ensure the global energy demands and decarbonize the production of electricity, the expanded utilization of solar photovoltaics (PV) as a renewable energy resource has been increasing in recent decades, principally with the feasibility to be integrated with the conventional power grid. However, supplying clean power from PV grid-connected system...

This paper proposes model free fractional order sliding mode control (MFFOSMC) for permanent magnet synchronous motor (PMSM). This approach proposes new simple switching control law characterised by simplicity of design and flexibility of control to add more flexibility and performance in the controller design. The equivalent control of SMC is base...

Voltage stability and power quality play very effective issues in power systems. This paper aims to improve the voltage stability and enhance system power quality in the AC-DC micro-grid system based on intelligent fuzzy controllers. These controllers are fuzzy-PI (FPI) and fuzzy-PID (FPID) current-controller with the existence of distribution stat...

Micro-grid is an effective solution to increase the power distribution reliability by using renewable energy sources or hybrid with a diesel generator. In this research, a hybrid energy system using a solar power system designed for extraction of 100 kW at peak power, at standard condition 1000 W/m2 and 25 ˚C with a diesel generator designed 500 KV...

SUMMARY The connection of small-scale embedded generation to the grid may influence the frequency and voltage stability of the power system. A load-frequency control technique for systems with high penetration of small-scale wind generation is proposed. The proposed controller has been successfully implemented and tested using PSCAD/EMTDC (PSCAD Po...

direct torque control (DTC) of induction motor is known to have a simple control structure with comparable performance to that of the field-oriented control technique (FOC). But there are two major problems that are usually associated with DTC drives are: 1) switching frequency that varies with operating conditions and 2) high torque and flux rippl...

In recent years the industrial application areas of the high performance AC drives based on Direct Torque Controller (DTC) technique have gradually increased due to its advantages over the field oriented control technique. Direct torque control (DTC) is one of the most excellent control strategies of torque control in PMSM. It is considered as an a...

In recent years the industrial application areas of the high performance AC drives based on Direct Torque Controller (DTC) technique have gradually increased due to its advantages over the field oriented control technique. Direct torque control (DTC) is one of the most excellent control strategies of torque control in PMSM. It is considered as an a...

The switching frequency of a conventional direct torque control (DTC) strategy which is based on hysteresis controllers results in a variable switching frequency which depends on the mechanical speed, stator flux, stator voltage, and the hysteresis band of the comparator. In this paper, a DTC scheme using space vector modulator (SVM) and fuzzy logi...