How to control frequency fluctuations during PV plant deloading
Researchers in Egypt have developed new control strategies for managing frequency fluctuations during deloading of a photovoltaic plant. The proposed methodology combines a proportional–integral controller along with a rate of change of frequency controller.
Photovoltaics for cocoa pod splitting
Scientists have designed a cocoa pod splitting device that runs on five monocrystalline PV panels. They have simulated its operation and have found it can achieve a splitting efficiency of 98.92%.
Winaico enters back-contact segment with 480 W solar module
The Taiwanese manufacturer has announced its WST-480BDX54-B2 Ultra Black Glass-Glass for the European market. It features an efficiency of 23.5%.
LNG, solar collectors improve round-trip efficiency of LAES systems
Scientists simulated several liquid air energy storage systems, comparing round-trip efficiency across configurations that include liquefied natural gas (LNG), solar, and Stirling engines, and further optimized performance using particle swarm methods.
WHES releases new C&I energy storage system
WHES has released a new commercial and industrial (C&I) energy storage system using a 509 kWh battery with power output options from 62.5 kW to 250 kW, and a maximum efficiency of 98.5%.
Novel MPPT method combines APO, model-predictive control
An international research team has tested a hybrid control technique combining adapted perturb and observe (APO) with model-predictive control to address complex partial shading in solar arrays. The method, validated through simulation and physical experiments, reportedly outperforms existing approaches.
PV module fault diagnosis uses convolutional neural network
Researchers in China have created a dataset of various PV faults and normalized it to accommodate different array sizes and typologies. After testing the new approach in combination with the 1D-CNN machine learning technique under different conditions, they found an accuracy of more than 99%.
PV-powered liquid air system yields hydrogen, heating, fresh water
A global scientific team has designed a novel multigeneration system based on renewable energy and liquid air energy storage, then used soft computing techniques to optimize its operation. The optimized levelized costs of hydrogen (LCoH) were $1.52/kg and $5.22/m³.
Surplus PV for electric delivery vehicles
Scientists in Japan have developed a model that predicts surplus PV generation and creates a route for optimized charging of electric delivery vehicles. They defined their work as a “practical blueprint for logistics operators.”
Map shows 43% of Iran’s land unsuitable for PV-powered water pumps
Scientists used geographic information systems and analytical hierarchy process methods to identify Iran’s most suitable areas for PV water pumping systems. They found 43.2% of land unsuitable, with Ardabil province the most favorable.
