A Job Management System for a Large Scale Grid System

The reliability of photovoltaic (PV) generators is strongly affected by the performance of Direct Current/Alternating Current (DC/AC) converters, being the major source of PV underperformance. However, generally, their reliability is not investigated at component level: thus, the present work presents a reliability analysis and the repair activity for the components of full bridge DC/AC converters. In the first part of the paper, a reliability analysis using failure rates from literature is carried out for 132 inverters (AC rated power of 350 kW each) with global AC power of 46 MW in a large scale grid-connected PV plant. Then, in the second part of the work, results from literature are compared with data obtained by analyzing industrial maintenance reports in the years 2015–2017. In conclusion, the yearly energy losses involved in the downtime are quantified, as well as their availability.

Download Full-text

Optimal power reallocation of large-scale grid-connected photovoltaic power station integrated with hydrogen production

Journal of Cleaner Production ◽

10.1016/j.jclepro.2021.126830 ◽

2021 ◽

pp. 126830

Author(s):

Yang Yang ◽

Chao Ma ◽

Chong Lian ◽

Yusheng Zhang ◽

Xiulan Pang

Keyword(s):

Hydrogen Production ◽

Large Scale ◽

Power Station ◽

Photovoltaic Power ◽

Optimal Power ◽

Large Scale Grid ◽

Scale Grid

Download Full-text

Research and Design on Workshop Job Management System Based on Web Electronic Digital Signage

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.816-817.1181 ◽

2013 ◽

Vol 816-817 ◽

pp. 1181-1184

Author(s):

Da Wei Dong

Keyword(s):

Operations Management ◽

Management System ◽

Job Shop ◽

Production Costs ◽

Shop Floor ◽

Digital Signage ◽

Job Management ◽

Business Efficiency ◽

Job Management System ◽

Manufacturing Productivity

The workshop job management system for improving manufacturing productivity and workshop information management plays an important role, while the electronic digital signage is seen as the core of shop floor control system. In this paper, the traditional electronic signage is proposed based on a new electronic digital signage network design, and its integration into the shop floor management systems. This paper developed job shop management system based on web electronic digital signage, the effective integration of existing hardware and software resources of the workshop, rational allocation of production resources of the workshop, the workshop production operations management to achieve digital control, reducing the workshop production costs, improve business efficiency. This paper presents the design of specific methods, and the establishment of a specific management model.

Download Full-text