This paper portrays a comparative analysis report of Proportional-Integral (PI) and Fuzzy Logic Controller (FLC) for total Power control of Photovoltaic (PV) based grid-tie single-phase five- level Quasi Z-Source Inverter (qZSI). The adopted power control scheme allows for independent maximum power point tracking (MPPT) and independent control of DC link voltage in each H-bridge of the proposed inverter. This analysis is carried out to depict the differences in the performance of both the controllers. It also demonstrates thesuitability of the controllers for the proposed topology. The proposed inverter has the advantages of reductionin size of the impedance network, negligence of boost converter stage and boosting of voltage with the help of 9shoot through states. The power control scheme has been implemented with both PI controller and FLC. Simulation has been carried out using MATLAB software and the results are presented.
Supercapacitors are the most promising energy storage devices that bridge the gap between capacitors and batteries. They can reach energy density close to the batteries and power density to the conventional capacitors. Several kinds of research have been carried out in the field of supercapacitors for the development of promising electrode and electrolyte materials as well as device fabrications to breakthrough in energy storage systems with diverse applications in electronics. They have a broad range of applications as they can deliver a huge power within a very short time. The applications of supercapacitors in several sectors like consumer and portable electronics, transportation and vehicles, power backup, biomedical, military, aerospace, etc.
Piezoelectric generators can be used strong vibrations convert to electrical power, it can be stored and utilized in low power devices such as radio frequency identification tags (RFIDs), wireless, global position system (GPS) and sensors. Since most low power devices are wireless, it is important that they have their own independent power. Traditionally, electrical energy comes from heavy lead acid and lithium ion batteries, which contain chemicals that are not environmental friendly. More importantly, lead acid and lithium ion batteries have an average lifespan of 500–1000 cycles, compared to carbon-based supercapacitors (10 lakhs cycle). With the introduction of a wide range of portable, wearable electronics devices and health monitoring equipment. Piezoelectric power harvesting equipment is one of the most applications of portable electronic power supply. Supercapacitors are promising electrochemical energy storage devices which possessing very high power density, rapid charge, and discharge rates with a long lifecycle. Supercapacitors hold high power density as compared to dielectric capacitors and hence supercapacitors are extensively utilized for powering several portable electronic devices. Supercapacitors explore a wide range of applications as they can deliver a high power within a very short period. In this paper describes various supercapacitor powered potential applications in various sectors like flexible, portable, wearable electronics, implantable healthcare and biomedical sensor, etc.
The increasing demand for electricity has pushed more effort to focus on renewable energy sources to satisfy the consumer. The renewable energy sources are playing a major role in the generation of electricity. Out of all the renewable energy sources, solar has emerged as one of the best sources of energy since it is clean, inexhaustible and eco-friendly. However, the voltage generated by the solar cell is not sufficient for any consumer load and it is also variable. Therefore, it is necessary to implement DCDC converters for regulating and improving the output voltage of the solar panel. In order to extract the maximum output from the PV (Photovoltaic) panel, a comparative analysis of various MPPT (Maximum Power Point Tracking) algorithms is proposed in this paper. The proposed enhanced adaptive P&O (Perturb and Observe) algorithm is modeled and implemented with a high gain DC-DC converter. The converter investigated in this paper consists of a single power electronic switch (MOSFET) for its operation, which leads to reduction of switching and conduction losses. The proposed converter has less ripple content and a high conversion ratio. A simulation study of the proposed power electronic converter powered by PV source is carried out in MATLAB/SIMULINK and the results are validated using an experimental setup.
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