Threshold decision-based online monitoring system for detection and location partial discharges in power transformers

2009 ◽  
Author(s):  
Na Chen ◽  
Yuetong Ding ◽  
Qingguo Sun ◽  
Xiaolan Sun ◽  
Lin Liu
Keyword(s):  
Monitoring System ◽  
Online Monitoring ◽  
Partial Discharges ◽  
Power Transformers ◽  
Online Monitoring System

Hardware Design of Online Monitoring System for Power Transformer Malfunction

2011 ◽  
Vol 143-144 ◽  
pp. 618-621
Author(s):  
Zhan Zhang ◽  
Cai Xia Gao
Keyword(s):  
Monitoring System ◽  
Computer Technology ◽  
Online Monitoring ◽  
Power Transformer ◽  
Partial Discharge ◽  
Power Transformers ◽  
Component Selection ◽  
Online Monitoring System ◽  
Gas Component ◽  
Selection Of

Power transformers are vital equipments in the grid and their reliability can affect the security of the grid directly. So it is always necessary to monitor the power transformers online. The study designed a multi-parameter online monitoring system for power transformer malfunction utilizing DSP and computer technology. The paper mainly introduced the design and component selection of online monitoring circuit for partial discharge, dielectric loss, gas component in oil and iron core's grounding current. The result showed that this system can diagnose most the malfunctions in power transformers with satisfactory property.

A Review on the Advancement of Online Monitoring System for Cellulosic Ethanol Production

2015 ◽  
Vol 1113 ◽  
pp. 751-756
Author(s):  
Rosmaria Abu Darim ◽  
Amizon Azizan ◽  
Jailani Salihon
Keyword(s):  
Renewable Energy ◽  
Monitoring System ◽  
Cellulosic Ethanol ◽  
Transfer Rate ◽  
Fermentation Process ◽  
Online Monitoring ◽  
Environmental Concern ◽  
Oxygen Transfer Rate ◽  
Sugar Fermentation ◽  
Online Monitoring System

Bioethanol is mainly produced by sugar fermentation process. Due to global demand on energy for transportation and environmental concern, biofuels as renewable energy in replacing petrol, the non-renewable energy source, has come into picture. Utilization of lignocellulosic biomass such as woody biomass (trees), herbaceous biomass (grasses) and waste cellulosic materials (solid waste) could be used in replacing starch (such as corn and potato) as source of sugar in producing bioethanol. Recently, study on cellulosic ethanol was focussing on fermentation process using ethanologenic strain such as engineered Escherichia coli and Saccharomyces cerevisiae. Invasive method in the study during fermentation may lead to uncertain or unwanted screening strategies or metabolic pathways. This paper reviews about the online monitoring system used by researchers in order to study the growth kinetics of ethanologenic strain. Online monitoring system for the Oxygen Transfer Rate (OTR) and Carbon dioxide Transfer Rate (CTR) is found to be the important method to study kinetic model of ethanologenic strain, thus increasing metabolic yields with optimum design condition.

Analyzing the kinetics of degradation of Acid Red B dye through Fenton oxidation with online monitoring system

2021 ◽  
Vol 216 ◽  
pp. 412-422
Author(s):  
Aiguo Li ◽  
Xiaofeng Fang ◽  
Jiangyuan Sun ◽  
Qianpeng Liu ◽  
Yingying Lian ◽  
...  
Keyword(s):  
Monitoring System ◽  
Online Monitoring ◽  
Fenton Oxidation ◽  
Kinetics Of Degradation ◽  
Online Monitoring System ◽  
Kinetics Of

Online Monitoring System for Stand-Alone Photovoltaic Applications—Analysis of System Performance From Monitored Data

2012 ◽  
Vol 134 (3) ◽  
Author(s):  
M. Torres ◽  
F. J. Muñoz ◽  
J. V. Muñoz ◽  
C. Rus
Keyword(s):  
Performance Analysis ◽  
Real Time ◽  
Monitoring System ◽  
Virtual Instrument ◽  
System Performance ◽  
Online Monitoring ◽  
Research Centre ◽  
Photovoltaic Systems ◽  
System Monitoring ◽  
Online Monitoring System

The Guidelines for the Assessment of Photovoltaic Plants provided by the Joint Research Centre (JRC) and the International Standard IEC 61724 recommend procedures for the analysis of monitored data to asses the overall performance of photovoltaic (PV) systems. However, the latter do not provide a well adapted method for the analysis of stand-alone photovoltaic systems (SAPV) with charge regulators without maximum power point tracker (MPPT). In this way, the IDEA Research Group has developed a new method that improves the analysis performance of these kinds of systems. Moreover, it has been validated an expression that compromises simplicity and accuracy when estimating the array potential in this kind of systems. SAPV system monitoring and performance analysis from monitored data are of great interest to engineers both for detecting a system malfunction and for optimizing the design of future SAPV system. In this way, this paper introduces an online monitoring system in real time for SAPV applications where the monitored data are processed in order to provide an analysis of system performance. The latter, together with the monitored data, are displayed on a graphical user interface using a virtual instrument (VI) developed in LABVIEW®. Furthermore, the collected and monitored data can be shown in a website where an external user can see the daily evolution of all monitored and derived parameters. At present, three different SAPV systems, installed in the Polytechnic School of University of Jaén, are being monitorized and the collected data are being published online in real time. Moreover, a performance analysis of these stand-alone photovoltaic systems considering both IEC 61724 and the IDEA Method is also offered. These three systems use the charge regulators more widespread in the market. Systems #1 and #2 use pulse width modulation (PWM) charge regulators, (a series and a shunt regulator, respectively), meanwhile System #3 has a charge regulator with MPPT. This website provides a tool that can be used not only for educational purposes in order to illustrate the operation of this kind of systems but it can also show the scientific and engineering community the main features of the system performance analysis methods mentioned above. Furthermore, it allows an external user to download the monitored and analysis data to make its own offline analysis. These files comply with the format proposed in the standard IEC 61724. The SAPV system monitoring website is now available for public viewing on the University of Jaén. (http://voltio.ujaen.es/sfa/index.html).

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