scholarly journals A study on problem diagnosis and maintenance guideline of small scale PV system

2018 ◽  
Vol 7 (2.12) ◽  
pp. 105
Author(s):  
Hee Chul Kim
Keyword(s):  
Power Generation ◽  
Monitoring System ◽  
High Efficiency ◽  
Low Cost ◽  
Monitoring Device ◽  
Cloud Type ◽  
Pv System ◽  
Solar Module ◽  
Iot Platform ◽  
Smoke Sensor

Background/Objectives: Research and development of low-cost, high-efficiency devices that can be installed without replacing existing power generation equipment is promoted early. It is aimed to prevent the damage of property and human life by detecting the fire of PV system. Therefore, it is possible to easily install the device without replacing the solar module The aim is to minimize the damage to people.Methods/Statistical analysis: In order to prepare for the safety accidents of the photovoltaic power generation facilities due to fire and blast, the monitoring system should have the following functions as essential. Measures and analyzes the voltage and current of power generated in each string in the connection board in real time. An alarm is triggered when an abnormality of a specific string is detected or when an abnormal temperature change is detected in the connection panel internal temperature sensor.If the smoke sensor inside the connection panel detects smoke generation and an abnormality such as a fire is caught, the monitoring system immediately generates an alarm.Findings: It provides services such as checking the status of customer power plants, improving power generation efficiency, and recovering quickly in case of a disaster through a monitoring system that supports stable operation of the PV plant and profit generation. By using the existing connection box function as it is, the company minimized the additional cost, and promoted and promoted a low-cost, high-efficiency system.Improvements/Applications: H/W module using temperature and smoke sensor is interlocked with existing connection semi-control system to develop efficient connection monitoring device. In order to link the sensor value with the monitoring system, messages are added and supplemented. For the application of the fail-safe solution, we developed a monitoring device to prevent the escape of the solar module and developed the H / W module using the vibration and loosening sensor. We will develop the solar monitoring system based on cloud type IoT platform by linking the fault recognition and alarm generation function by adding / supplementing the sensor value to link with the monitoring system.As a power station management for cloud type (ASP) service, adoption of oneM2M standard based IoT platform can expand acceptance by monitoring web and mobile based monitoring as well as real time monitoring and fault monitoring of solar power plant.  

scholarly journals Transformer Less Self-Commutated PV Inverter

2021 ◽  
Vol 10 (8) ◽  
pp. 1-4
Author(s):  
Maithili P ◽  
Kanakaraj J
Keyword(s):  
Power Generation ◽  
High Efficiency ◽  
Low Cost ◽  
Photovoltaic Effect ◽  
Electrical Energy ◽  
Power Demand ◽  
Solar Pv ◽  
Pv System ◽  
Pv Inverter ◽  
Low Efficiency

The power demand is increased day by day and generation of electrical energy from non-renewable sources are not able to meet the demand. An alternate energy sources are the only solution to meet the power demand. The power generation from solar energy with photovoltaic effect is plays a major role. This Solar PV system has low efficiency. The power semiconductor devices and converter circuit along with inductive / magnetic circuit. The Inverter circuit have an influence on photovoltaic power generation to improve the level of output voltage along with efficiency. In this paper a new transformer less DC-AC converter is proposed, and it has high efficiency, requires less cost when compares with conventional inverter with transformer. Transformer less self-commutated photovoltaic inverter is reflected the advantages of central and string inverters. It gives high output power and low-cost converter. These transformer less DC-AC converter is connect with Boost/Buck-Boost converter for the better output. So, this proposed DC-AC converter topology is not required mechanical switching and it is lighter in size. The PV technology has low efficiency and utilize more cost for generation of power. The proposed transformer less PV inverter is the better choice to increase the usefulness and reduce the charge rate of this PV system.

scholarly journals Research on the Performance of Solar Aided Power Generation System Based on Annular Fresnel Solar Concentrator

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1579
Author(s):  
Heng Zhang ◽  
Na Wang ◽  
Kai Liang ◽  
Yang Liu ◽  
Haiping Chen
Keyword(s):  
Power Generation ◽  
High Efficiency ◽  
Low Cost ◽  
Economic Index ◽  
Partial Replacement ◽  
Solar Concentrator ◽  
Small Disturbance ◽  
Step Size ◽  
Water Matrix ◽  
Cost Utilization

A solar-aided power generation (SAPG) system effectively promotes the high efficiency and low cost utilization of solar energy. In this paper, the SAPG system is represented by conventional coal-fired units and an annular Fresnel solar concentrator (AFSC) system. The annular Fresnel solar concentrator system is adopted to generate solar steam to replace the extraction steam of the turbine. According to the steam–water matrix equation and improved Flugel formula, the variable conditions simulation and analysis of the thermo-economic index were proposed by Matlab. Furthermore, in order to obtain the range of small disturbance, the method of partial replacement is used, that is, the extraction steam of the turbine is replaced from 0 to 100% with a step size of 20%. In this work, a SAPG system is proposed and its thermo-economic index and small disturbance scope are analyzed. The results show that the SAPG system is energy-saving, and the application scope of small disturbance is related to the quantity of the extraction steam and evaluation index.

New low-cost high-efficiency solar module: diffracting deflector module

2012 ◽  
Author(s):  
V. Gâté ◽  
Y. Jourlin ◽  
M. Langlet ◽  
F. Vocanson ◽  
O. Parriaux ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Solar Module

Realizing high-efficiency power generation in low-cost PbS-based thermoelectric materials

2020 ◽  
Vol 13 (2) ◽  
pp. 579-591 ◽  
Author(s):  
Binbin Jiang ◽  
Xixi Liu ◽  
Qi Wang ◽  
Juan Cui ◽  
Baohai Jia ◽  
...  
Keyword(s):  
Power Generation ◽  
Conversion Efficiency ◽  
Thermoelectric Materials ◽  
High Efficiency ◽  
Low Cost ◽  
Thermoelectric Module ◽  
High Conversion ◽  
High Conversion Efficiency

A high conversion efficiency of 11.2% was realized in a low-cost PbS-based segmented thermoelectric module.

scholarly journals Design and Implementation of Three-Level DC-DC Converter with Golden Section Search Based MPPT for the Photovoltaic Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Chouki Balakishan ◽  
N. Sandeep ◽  
M. V. Aware
Keyword(s):  
High Voltage ◽  
High Performance ◽  
High Efficiency ◽  
Low Cost ◽  
Golden Section ◽  
Boost Converter ◽  
Pv System ◽  
Point Tracking ◽  
Golden Section Search ◽  
Energy Conversion Systems

In many photovoltaic (PV) energy conversion systems, nonisolated DC-DC converters with high voltage gain are desired. The PV exhibits a nonlinear power characteristic which greatly depends on the environmental conditions. Hence in order to draw maximum available power various algorithms are used with PV voltage/current or both as an input for the maximum power point tracking (MPPT) controller. In this paper, golden section search (GSS) based MPPT control and its application with three-level DC-DC boost converter for MPPT are demonstrated. The three-level boost converter provides the high voltage transfer which enables the high power PV system to work with low size inductors with high efficiency. The balancing of the voltage across the two capacitors of the converter and MPPT is achieved using a simple duty cycle based voltage controller. Detailed simulation of three-level DC-DC converter topology with GSS algorithm is carried out in MATLAB/SIMULINK platform. The validation of the proposed system is done by the experiments carried out on hardware prototype of 100 W converter with low cost AT’mega328 controller as a core controller. From the results, the proposed system suits as one of the solutions for PV based generation system and the experimental results show high performance, such as a conversion efficiency of 94%.

Research Status and Prospect of Dish-Stirling System

2014 ◽  
Vol 953-954 ◽  
pp. 83-86 ◽  
Author(s):  
Lin Jun Wang ◽  
Li Xiao Xu ◽  
Jing Men ◽  
Dong Zhang ◽  
Zhang Wei Gao ◽  
...  
Keyword(s):  
Power Generation ◽  
Simple Structure ◽  
High Efficiency ◽  
Low Cost ◽  
Thermal Power ◽  
Low Noise ◽  
Green Energy ◽  
Main Research ◽  
Power Generation System ◽  
Solar Thermal Power Generation

Solar energy is a kind of clean and green energy, its use can reduce the dual pressure of resources and environmental pollution. Firstly, this paper introduces groove, tower and dish type solar thermal power generation system. Then it introduces the components of dish-stirling system and the principle and features of stirling engine. The system has simple structure, reliable operation, high efficiency, low noise, low cost of power generation and good commercial prospects. But for some key parts of system, there are many problems that need to be solved. The main research of dish-stirling system is to optimize the key parts of system and reduce the system costs.

scholarly journals A large area (70 cm2) monolithic perovskite solar module with a high efficiency and stability

2016 ◽  
Vol 9 (12) ◽  
pp. 3687-3692 ◽  
Author(s):  
Anish Priyadarshi ◽  
Lew Jia Haur ◽  
Paul Murray ◽  
Dongchuan Fu ◽  
Sneha Kulkarni ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Active Area ◽  
Large Area ◽  
Solar Module ◽  
Processing Methods ◽  
Module 10

A large area and highly stable perovskite solar module (10 cm × 10 cm, active area ∼70 cm2) is demonstrated using low cost processing methods and materials.

scholarly journals Design and Initial Development of Monolithic Cross-Flow Ceramic Hot-Gas Filters

1999 ◽  
Author(s):  
Virginie Vaubert ◽  
David P. Stinton ◽  
Chris Barra ◽  
Santosh Limaye
Keyword(s):  
Power Generation ◽  
High Efficiency ◽  
Low Cost ◽  
National Laboratory ◽  
Cross Flow ◽  
Combined Cycle ◽  
Fluidized Bed Combustion ◽  
Initial Development ◽  
Oak Ridge ◽  
Hot Gas

Advanced, coal-fueled, power generation systems utilizing pressurized fluidized bed combustion (PFBC) and integrated gasification combined cycle (IGCC) technologies are currently being developed for high-efficiency, low emissions, and low-cost power generation. In spite of the advantages of these promising technologies, the severe operating environment often leads to material degradation and loss of performance in the barrier filters used for particle entrapment. To address this problem, LoTEC Inc., and Oak Ridge National Laboratory are jointly designing and developing a monolithic cross-flow ceramic hot-gas filter. The filter concept involves a truly monolithic cross-flow design that is resistant to delamination, can be easily fabricated, and offers flexibility of geometry and material make-up. During Phase I of the program, a thermo-mechanical analysis was performed to determine how a cross-flow filter would respond both thermally and mechanically to a series of thermal and mechanical loads. The cross-flow filter mold was designed accordingly, and the materials selection was narrowed down to Ca0.5Sr0.5Zr4P6O24 (CS-50) and 2Al2O3−3SiO2 (mullite). A fabrication process was developed using gelcasting technology and monolithic cross-flow filters were fabricated. The program focuses on obtaining optimum filter permeability and testing the corrosion resistance of the candidate materials.

scholarly journals The Possibility of a High-efficiency Wave Power Generation System using Dielectric Elastomers

2021 ◽  
Author(s):  
Kazuhiro Ohyama ◽  
Seiki Chiba ◽  
Mikio Waki ◽  
Changqing Jiang ◽  
Makoto Takeshita ◽  
...  
Keyword(s):  
Power Generation ◽  
Environmental Sustainability ◽  
High Efficiency ◽  
Low Cost ◽  
Artificial Muscle ◽  
Current Status ◽  
Oscillating Water Column ◽  
Generation System ◽  
High Efficient ◽  
Power Generation System

Abstract: Power generation using dielectric elastomer (DE) artificial muscle is attracting attention because of its light weight, low cost, and high efficiency. Since this method is a system that produces electricity without emitting carbon dioxide nor using rare earths, it would contribute to the goal of environmental sustainability. In this paper, the background of DEs, the associated high-efficient wave energy generation (WEG) systems that we developed using DEs, as well as the latest development of its material are summarized. By covering the challenges we face and the achievements that we’ve reached, we can discuss the opportunities to build the foundation of a recycled energy society through the usage of these WEGs. On the other hand, to make these possibilities commercially successful, the advantages of DEs need to be integrated with traditional technologies. To achieve this, we also consider the method of using DEs alone and a system used in combination with an oscillating water column. Finally, the current status and future of DEGs are discussed.

scholarly journals IOTFlood: hardware and software platform using internet of things to monitor floods in real time

2021 ◽  
Vol 16 (4) ◽  
pp. 1
Author(s):  
Francisco Vital Da Silva Júnior ◽  
Mônica Ximenes Carneiro Da Cunha ◽  
Marcílio Ferreira De Souza Júnior
Keyword(s):  
Internet Of Things ◽  
Real Time ◽  
Monitoring System ◽  
Research Design ◽  
Open Source Software ◽  
Low Cost ◽  
Sensor Data ◽  
Software Platform ◽  
Web Interface ◽  
Iot Platform

Floods are responsible for a high number of human and material losses every year. Monitoring of river levels is usually performed with radar and pre-configured sensors. However, a major flood can occur quickly. This justifies the implementation of a real-time monitoring system. This work presents a hardware and software platform that uses Internet of Things (IoTFlood) to generate flood alerts to agencies responsible for monitoring by sending automatic messages about the situation of rivers. Research design involved laboratory and field scenarios, simulating floods using mockups, and later tested on the Mundaú River, state of Alagoas, Brazil, where flooding episodes have already occurred. As a result, a low-cost, modular and scalable IoT platform was achieved, where sensor data can be accessed through a web interface or smartphone, without the need for existing infrastructure at the site where the IOTFlood solution was installed using affordable hardware, open source software and free online services for the viewing of collected data.

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