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Advanced control techniques such as Volt-Watt and Volt-VAR Control have been developed for high integration of distributed renewable energy, such as Photovoltaic (PV) resources, on an electric distribution system. However, designing these control parameters which yields the best results in the system is complicated and depends on feeder conditions. This paper proposes a method to properly design the...
Power Hardware in the Loop (PHIL) simulations have recently been developed as a substitution for traditional methods of testing and analyzing real and physical electric power apparatus, especially power electronic based devices. However, due to some inherent characteristics of the PHIL test setup — such as use of power amplifiers, software/hardware interfaces, and real time simulations — there are...
Advanced control techniques such as Volt-VAR Control (VVC) are required for integration of multiple distributed renewable energy, such as Photovoltaic (PV) resources, on an electric distribution system. However, undesired interactions have been observed among these Volt-VAR controlled PV inverters which leads to oscillation and instability of the system. In this paper, an analytical approach to study...
Overall performance of the voltage source converters (VSCs) has improved during the recent years. Improvement of the VSCs along with the attractive features of the VSC-based high-voltage direct current (HVdc) transmission systems over the thyristor-based HVdc transmission systems make it possible to build multiterminal VSC HVdc transmission systems. However, the VSCs are vulnerable against dc-side...
The DC transmission system provides a cost effective solution for long distance power transmission compared to the AC transmission system. Hence, this has increased the emphasis on the development of the DC transmission system. Development of power converter with modular structure has now made it possible to achieve higher voltage and power level. This opens the possibility for further development...
This paper introduces a variable interleaving technique for photovoltaic cascaded DC-DC converters. A series rather than parallel connection of converters allows higher switch utilization and lower rating of components; however, they suffer from nonhomogeneous irradiations condition. Under partial shading conditions, the input power of all PV panel will not be the same and as a result the output voltage...
The PWM-controlled Voltage Source Converters (VSCs) are commonly used in industrial and utility applications. In spite of superior features of fast voltage regulation and stable DC-link voltage, PWM-controlled VSCs have the major drawback of being sensitive to the grid disturbances especially the unbalanced conditions and system faults. Unbalanced input voltage generates large negative sequence current...
Electric Arc Furnaces (EAF) are high power industrial loads which cause power quality problems at all voltage levels due to their unbalanced and nonlinear characteristics. The rapid, stochastic large swings in real and reactive power required by the arc furnace causes voltage drops, rapid voltage variation and distortion across the ac supply network. These voltage drops and fluctuations not only have...
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