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Nowadays, due to the high-scale penetration of photovoltaic systems, reliable and efficient photovoltaic grid-connected systems using the advances of power electronics and advanced control techniques are desirable. In this paper, using the general structure for synchronous dq0 frame, a single-stage three-phase grid-connected photovoltaic inverter with a nonlinear control strategy is developed to generate...
Due to the high-scale penetration of single-phase photovoltaic (PV) systems in distributed generation, a single-stage single-phase grid-connected PV system, with a nonlinear control strategy is presented in this paper. Using the general structure for synchronous dq0 frame, the controller is developed to obtain maximum power from the PV array regardless of the atmospheric conditions without the requirement...
A filter-based control scheme is developed for buck-type converters. This approach relies only on a single output voltage measurement. The benefits of this approach are reducing the system cost as well as measurement noise and disturbance injected by output current and/or inductor current measurements. A Lyapunov stability analysis is utilized to demonstrate system stability. Experimental results...
A robust nonlinear controller is presented for output tracking of a single phase LC-filtered voltage source inverter. The proposed control uses a second order system model to develop an output feedback control scheme based on a variable structure observer. The use of this nonlinear observer allows for elimination of costly current sensors and the ripple and noise which is inherent in such measurements...
This paper presents a filter-based control scheme for an H-Bridge inverter with output LC filter. This approach relies only on a single output voltage measurement to reduce the system cost as well as measurement noise and disturbance injected by output current and/or inductor current measurements. To reduce the controller sensitivity to the system parameters, the proposed controller is developed for...
An inverter with an output LC filter can be used for generation of sinusoidal output voltage with low harmonic distortion, suitable for distributed generation systems. However, with the growing number of electronic devices with rectifiers at the front end of their power supply, the nonlinearities of the load current in power systems are increasing. As such designing an inverter system with a nonlinear...
In this paper, a nonlinear backstepping controller is proposed for the control of a 3-phase 3-level diode clamped inverter with an output LC filter under different loads including balanced, unbalanced, linear and nonlinear loads. Also, the seamless transition of the inverter from standalone to grid-tie is investigated while the inverter is under the control of the proposed scheme. Lyapunov stability...
The nonlinearities of the load current in power systems are increasing with the growing number of electronic devices with rectifiers at the front end of their power supply. Therefore designing an inverter that can overcome these nonlinearities in the output current and generate an AC output voltage within the desired Total Harmonic Distortion (THD) level is critical to meeting the power quality requirements...
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