Energy and Exergy Analysis of a Pressurized Solar Cooking System Based on a Parabolic Dish Collector

Energy storage devices (ESS) and distributed generations are integrated or characterized with the help of distribution networks (ADNs). Micro grids (MGs) are ADNs but they can also operate in stand-alone mode. Micro grid provides redress to several factors in the power quality systems by integrating renewable and non-renewable Distributed Energy Resources along with Energy Storage Systems. A robust optimization framework for economic dispatch (ED) for such a micro grid is proposed in this paper. In this paper, modified IEEE 24 bus model of mess distribution including energy resources that are intermittent such as photovoltaic (PV) energy source, wind turbines, include conventional diesel generators, battery energy storage (BES) systems are essential components of hybrid energy systems. PV units convert sunlight into electricity while wind turbines harness power from the wind systems store excess energy generated has been considered to implement the proposed optimized algorithm. In this technique, micro grid is heavily loaded or operated in islanded mode to realize that the local generation and Because of the penetration of distributed energy resources, system operators can meet this high demand for heavy loads with no need to purchase additional power from the grid. A time varying voltage dependent load model has been considered for obtaining the optimal economic dispatch for an IEEE test system. The impacts of Battery energy and distributed energy system penetration has also been considered. The voltage deviation is minimized while taking the technical constraints of alternate current optimal power flow (OPF) into account. In addition, the paper also considers conservation voltage reduction (CVR) with the aim to optimally schedule reactive power from inverters for voltage regulation support and BES's charging/discharging. The problem is solved under different scenarios and examined within a 24 hour (h) time horizon. The results are obtained for different scenarios and discussed to reflect the effectiveness and efficiency of the proposed optimization technique.

Section: Simulation Results and Discussionmentioning

confidence: 99%

Section: Introduction 11 Background and Motivationmentioning

confidence: 99%

Robust Optimization Framework for Economic Dispatch of DER and BES Based Micro Grid Considering a Voltage Dependent Load

Kumar,

Sharma,

Kumar

2023

“…The discussion on results takes place, and the comparative analysis is done based on previously available data and the scope of future work identified. It must be financially feasible for household and industrial use for a newly created system 33) . Precise sizing and operating conditions are crucial factors to ensure cost-effectiveness 34) .…”

Section: Methodsmentioning

confidence: 99%

Enhancing the Thermal Efficiency and Optimum Temperature of a Modified Evacuated Tube Solar Air Collector by using the Reflector

Zaphar,

Verma

2023

The experimental investigation of the thermal efficiency of a retrofitted evacuated tube solar collector employing air as the working fluid, with and without a rectangular aluminum sheet reflector during the winter, considering both sunny day and hazed day climatic conditions occurred at Glocal University in Saharanpur, India, between 30 17' (latitude) North and 77 38' (longitude) East. The solar collector comprises vacuum tubes with directed inner tubes that are 22 mm in diameter and are put in a single-ended steel cuboid-shaped manifold. The inner steel tubes supply the input air into the vacuum tube. The heated air is generated in vacuum tubes, collected in the central header cylindrical manifold, and expelled through the exit pipe. With an aluminum sheet reflector fixed, the flow velocity, mass flow rate, and irradiance affect thermal efficiency and exit air temperature. In the case of a stainless-steel tube with a 22 mm diameter and a length of 1.27 meters, the maximum temperature difference between the outside air and the input air is 71.9 C, and the maximum temperature recorded is 96.9 C. A higher efficiency of 36.69% is attained with a suitable aluminum sheet reflector at an increased flow rate of 20.14 kg/h. In ETSCs that have been updated, there is an average rise in exit air temperature of 37.5%.

“…However, existing power must be used efficiently. For this, the power electronic circuits could be a solution to more effectively utilize existing energy, i.e., renewable energy [3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

Slip-Ring Induction Motor Torque and Current Ripple Minimization Using Bang-Bang Current Control

Emar¹,

Al-Omari²,

Rawashdeh³

2023

This paper presents a significant improvement in the dynamic performance and control of an isolated slip-ring induction motor (SRIM). The stator windings of this SRIM-based wound rotor motor are connected to a fixed dc voltage PV system through a boost converter (BC) and a twolevel three-phase voltage source inverter (VSI). Thus, SRIM is modulated and controlled using a nonlinear ramp bang-bang current-mode technique (RBBCM) with PWM a modulated inverter VSI. Using Simplorer 7, and MATLAB, the experimental and simulation results are investigated and compared between these techniques.The results show the following: the improvement, which can be seen by modulating the fixed frequency and waveform achieved by the inverter; The phase shift between the main component of the load phase voltage and current is almost zero; In addition, the variable hysteresis modulation successfully cancels noise and disturbances while also mitigating both higher and lower-order harmonics. The experimental results are investigated and compared with respect to total harmonic distortion, transient response of SRIM speed and developed torque, and other factors that may affect the SRIM performance.