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Now a days, wind and solar energy are most commonly used as renewable energy sources (RES). These sources highly depend on environment and geographical conditions of a particular location. Main drawback of RES is randomness in power production due to their inherent uncertainty nature. Hence, energy management is difficult task for these sources. Wind, photovoltaic (PV) and sodium nickel chloride (SNC)...
This paper presents modeling and control of a standalone photovoltaic (PV) system in which a battery is used as a backup source for power management between the source and the load. Lead-acid battery is commonly used in high power PV applications due to its low cost and availability in large size. The modeling of PV system and lead-acid battery by using the corresponding equivalent circuits are discussed...
The rooftop solar power generation systems with Solar Energy Meter (SEM) is implemented to satisfy the increasing demand for electricity. Gross Energy Meter (GEM) and Net Energy Meter (NEM) are the two types of solar meter where unidirectional Gross Energy Meter is already in use. This paper highlights the design of bidirectional Net Energy Meter which is programmed in FPGA for Microgrid with multiple...
In this paper, a cascaded sliding mode control strategy is proposed for a grid-connected inverter system to simultaneously improve the power quality of the local load voltage and the injected grid current. This control scheme also enables a novel seamless transfer operation between grid-connected and stand-alone mode. The controller comprises of an inner voltage loop with proportional controller and...
This paper presents modeling and control for a single-phase grid-connected two-stage micro-inverter system. An average signal model has been developed for a single-phase bridge inverter. The proposed controller has three cascaded control loops. The inner current loop consists of a variable frequency hysteric current mode control which regulates output filter inductor current thereby improved system...
Bulk electrolytic capacitors are used in single phase inverters to reduce the ripple in dc link voltage which is due to the pulsating nature of the instantaneous power. The reliability of an inverter is limited by the lower lifetime of these capacitors. In addition, the switching devices also deteriorate the reliability, due to their significant failure rate. In order to improve the overall reliability...
A Fuzzy Proportional-Integrator-Derivative (PID) has been put forward in aforementioned paper. Tuning of FLC is done using three met heuristics algorithm namely PSO, FA & TLBO to actuate the different parameters of PID controller in AVR system. The objective function applied in the model is ITAE as well as controller optimum gain is also inherited. TLBO approach FPID controller shows better transiency...
This paper deals with design and analysis of AVR using proportional-integral-derivative (PID) controller optimized by Teaching Learning Based Optimization (TLBO) algorithm The optimum gain of the controller for the proposed model is obtained with objective function as Integral Time Absolute Error (ITAE). The performance of the system is found to be better in every aspect in terms of the settling point,...
This paper proposes a control algorithm for DSTATCOM (Distributed STATic COMpensator) to compensate the source current harmonics in a non-sinusoidal voltage source environment. A 3-leg VSC (voltage source converter) based DSTATCOM is used for the load compensation, on a system consisting balanced 5th harmonic PCC voltages, in 3-phase, 4-wire distribution system. Simulations are performed in MATLAB...
Maintaining good voltage regulation and achieving fast dynamic response under sudden load fluctuation are extremely important in distributed generation (DG) as well as uninterrupted power supply (UPS) systems. This paper presents a fixed frequency hysteresis current (FFHC) controller, which is implemented on the basis of sliding mode control (SMC) technique and fixed frequency current controller with...
For power quality improvement, shunt active power filters (SAPF) having PWM controlled voltage source inverter (VSI) topology is extensively used in distribution networks, which utilizes the PI controller for reference voltage tracking. PI controller tuning with the assumption of linear PWM model leads to unsatisfactory results under varying operating conditions. Optimal tuning of PI gains is required...
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