Grid-Connected Photovoltaic Monitoring System Based on Virtual Instrument

2014 ◽  
Vol 521 ◽  
pp. 233-240 ◽  
Author(s):  
Yun Long Ma ◽  
Li Jun Tian ◽  
Ying Lin Qin ◽  
Tao Jiang
Keyword(s):  
Monitoring System ◽  
Virtual Instrument ◽  
Photovoltaic System ◽  
Measuring System ◽  
Distributed Monitoring ◽  
Virtual Instrumentation ◽  
Interactive Interface ◽  
Historic Data ◽  
Coupling Point

Combined with the theories of distributed monitoring, the technologies of virtual instrumentation and database management,a grid-connected photovoltaic monitoring system is developed based on virtual instrumentation technology. The hardware architecture and software programming are expounded, by hardware and software ways, various parameters of the grid-connected photovoltaic system are collected and analyzed real-timely with CompactRIO system and PXI measuring system, it realizes the functions of monitoring the performance of the PV at the real-time, detecting the power quality of the common coupling point (PCC) and historic data management. Compared with traditional monitoring system, not only it meets the requirements of grid research for sampling speed, precision and recording capacity, but also the friendly interactive interface and the flexible expansibility are more comfortable for operators.

Distributed Monitoring and Supervising System for E-Health Applications

2012 ◽  
pp. 264-314
Author(s):  
Silviu Folea ◽  
Mihai Hulea ◽  
Camelia Avram ◽  
Adina Astilean
Keyword(s):  
Elderly Patients ◽  
Health Monitoring ◽  
User Interfaces ◽  
Communication Systems ◽  
Large Set ◽  
Distributed Monitoring ◽  
Virtual Instrumentation ◽  
Web Based ◽  
Distinctive Features

The system presented in this chapter is mainly destined to offer support and to monitor chronic and elderly patients. In accordance with the new tendencies in the field, it integrates innovative components for data acquisition systems, Web-based virtual instrumentation, personalized user interfaces, and relational data in a complex, modular, flexible, and opened structure. Compared with other similar integrated communication systems, which are based on Wi-Fi technology, the presented one has as distinctive features: small dimensions, low power consumption, and a considerable autonomy. A large set of experiments and the corresponding results illustrates the functionality of the configurable virtual web instrument principle materialized in the E-Health Monitoring and Supervising System (EMSS) that has many possible applications. As an example, a cheap, easy to use, and personalized support destined to improve the quality of life for subjects suffering from chronic diseases or elderly patients was chosen. The implementation of the complete application included a model for gesture recognition, which allows the classification and assessment of the characteristics of the subject’s movement, highlighting even small progresses of the monitored patients.

The Design of Multiplexer for On-Line Partial Discharge Monitoring System

2013 ◽  
Vol 753-755 ◽  
pp. 2227-2231
Author(s):  
Yuan Yang ◽  
Jian Gang Bi ◽  
Yan Peng Gong ◽  
Ning Yang
Keyword(s):  
Monitoring System ◽  
Virtual Instrument ◽  
Partial Discharge ◽  
Simultaneous Detection ◽  
Field Application ◽  
Measuring System ◽  
Signal Acquisition ◽  
Time Sharing ◽  
On Line ◽  
Discharge Monitoring

Partial discharge is an important content of insulation monitoring of high-voltage power equipment, which generates high-frequency signals and real-time monitoring data is of great quantity. Simultaneous detection of multi-channel signals faces technical difficulty, and of high cost and poor reliability, it can also cause unnecessary waste of resources. In accordance with the characteristics and needs of partial discharge monitoring system at substation site, the concept of time-division multiplexing technology in communication technology is adopted into the multi-channel signal acquisition and measuring system, which using multiplexer MAX4638 and virtual instrument. The designed multiplexer for the partial discharge monitoring overcame several shortcomings, such as hardware resources consumption, poor reliability and high cost in multi-channel synchronous acquisition. By using of polling method to achieve one detection device for the time-sharing acquisition and processing of multiple devices or signals, this device can greatly enhance the on-line monitoring system economically and practically in the field application.

LabVIEW8.6-Based Temperature Monitoring System for Generator Bearing

2013 ◽  
Vol 373-375 ◽  
pp. 884-887
Author(s):  
Qin Chun Hu ◽  
Peng Hu
Keyword(s):  
Monitoring System ◽  
Virtual Instrument ◽  
Engineering Application ◽  
High Accuracy ◽  
Experimental Results ◽  
Good Stability ◽  
Measuring System ◽  
Software Implementations ◽  
Instrument Technology ◽  
Filtering Effect

A generator bearing temperature measuring system is designed, based on the LabVIEW8.6 and virtual instrument technology, in this paper. The hardware and software implementations of the system are introduced. The system is tested and analyzed both in algorithm of linearity and filtering effect. The experimental results show that the proposed system has good characters of good stability and high accuracy, which are valuable in engineering application.

scholarly journals Power Quality Monitoring using Virtual Instrumentation & LABVIEW

2021 ◽  
Vol 10 (5) ◽  
pp. 197-205
Author(s):  
Abhishek Sur ◽  
Suman Lata Dhar
Keyword(s):  
Virtual Environment ◽  
Power Quality ◽  
Monitoring System ◽  
Power Factor ◽  
Power Converters ◽  
Quality Monitoring ◽  
Virtual Instrumentation ◽  
Power Quality Monitoring

This Paper principally portrays that a Power Quality Monitoring system utilizing LabVIEW is created. Because of the higher utilization of power converters and other nonlinear burdens in industry and by customers all in all, it very well may be noticed an expanding crumbling of the power frameworks voltage and current waveforms [1]. The paper ‘Power Quality Monitoring using Virtual Instrumentation and LABVIEW’ basically depicts the monitoring of the quality of the power generated during the process with the help of a virtual environment that is LABVIEW. Now this paper is very much simple and is based on finding the power factor along with Active, Reactive and Apparent Power. In additional to that Active/Apparent and Reactive Energies is also found out and the nature of the graph is also found out accordingly. Here we are using Current and Voltage Transformers as the basic transducers and ideal values of voltage and current is taken and the graph is plotted with respect to voltage/current and the power/energies. The nature of both the graphs is quite different in case of power it is linearly increasing with the time, whereas in case of the energies the graph is linear in nature. Also the error and accuracy is found out with a fluke data which is based on the values of fluke instruments.

Virtual Instrument for Measuring Elastic Modulus of Wood Floor

2010 ◽  
Vol 37-38 ◽  
pp. 1634-1637
Author(s):  
Dong Zhao ◽  
Jian Zhong Zhang ◽  
Jian Zhao
Keyword(s):  
Signal Processing ◽  
Elastic Modulus ◽  
Virtual Instrument ◽  
Measuring System ◽  
Performance Parameters ◽  
Time Data ◽  
Testing Instrument ◽  
Wood Floor ◽  
Real Time Data

Elastic modulus is one of the most important performance parameters of wood-based material, and plays an important role for predicting and evaluating quality of wood-based material. At present, the traditional problems for measuring elastic modulus of wood-based material are: expensive testing instrument, short precision, low immunity to noise and less ease to connect. This paper presents a new elastic modulus-measuring system based on virtual instrument. The system ensures the following functions: (1) real-time data acquisition, (2) signal processing and analyze, (3) saving the file in the appropriate format, (4) computing dynamic elastic modulus by the natural frequency. The analytical results of our experiments show that it is feasible, reliable and effective to use the proposed instrumentation for measuring elastic modulus of wood-based floor.

scholarly journals Low-Impact Current-Based Distributed Monitoring System for Medium Voltage Networks

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5308
Author(s):  
Alessandro Mingotti ◽  
Lorenzo Peretto ◽  
Roberto Tinarelli
Keyword(s):  
Monitoring System ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Distribution Networks ◽  
Distributed Monitoring ◽  
Power Networks ◽  
Medium Voltage ◽  
Intelligent Electronic Devices ◽  
A Current

Distribution networks are currently subject to a huge revolution in terms of assets being installed. In particular, the massive spread of renewable energy sources has drastically changed the way of approaching the grid. For example, renewables affected (i) the production of the legacy power plants, (ii) the quality of the supplied energy, decreasing it, (iii) the fault detection and location, etc. To mitigate the significant drawbacks of the renewables’ presence, several intelligent electronic devices have been (and are being) developed and installed among the grid. The aim is to increase grid monitoring and knowledge of its status. However, considering the significant number of nodes of the distribution network, compared to the transmission one, the process of installing new equipment is not effortless and is also quite expensive. This work aims at emphasizing a new concept of distributed monitoring systems, based on the phasor measurement unit’s current measurements, and a controlling algorithm to exploit it. The idea underneath the work is to avoid the out-of-service time needed and the costs associated with the installation of voltage sensors. Therefore, this paper describes an algorithm that exploits measurements from existing equipment and current measurements from PMUs to obtain information on the load and the node voltages. The algorithm is then tested on simulated power networks of increasing complexity and verified with an uncertainty evaluation. The results obtained from the simulation confirm the applicability and effectiveness of the algorithm and the benefits of a current-based monitoring system.

Virtual instrument designed for data acquisition

2020 ◽  
Vol 65 (1) ◽  
pp. 179-186
Author(s):  
Mihaela Dorica Stroia
Keyword(s):  
Software Development ◽  
Data Acquisition ◽  
Virtual Instrument ◽  
Virtual Instrumentation ◽  
Design And Implementation ◽  
Adequate Design

Current software development directions open up a world of possibilities, especially in the engineering field. Present paper is meant to highlight the advantages and in particular the ease of using virtual instrumentation facilities, with a proper and adequate design and implementation of desired instrument. In this idea we bring into discussion a design for virtual instrument which can be used for data acquisition that can be stored for further simulations according to the needs required by the process in discussion.

Research on Construction and Function of Safety Monitoring Sys- tem for Integrated Construction Site Based on BIM

1970 ◽  
Vol 1 (1) ◽  
Author(s):  
Dan Xin
Keyword(s):  
Monitoring System ◽  
Safety Management ◽  
Safety Monitoring ◽  
Information Collection ◽  
Construction Site ◽  
Management Efficiency ◽  
Lack Of Information ◽  
Safety Monitoring System ◽  
And Function

The effective construction of safety monitoring system at construction site depends on perfect management system and advanced technical support. And the lack of information technology platform, resulting in reduced management efficiency, information is not accurate and other issues. Based on the construction site safety monitoring system to achieve the goal, to do a good job in advance prevention, to take the latest information collection technology RFID and BIM integrated comprehensive and effective monitoring of the construction site, constitute the main technology in the monitoring system, thus ensuring the construction site safety monitoring efficiency , Comprehensive, real-time, etc., on the management and technical two points to achieve the construction site safety monitoring, improve the quality of safety management.

Development of a Visual Monitoring System for Deformation Measuring of Welded Members and its Application

2008 ◽  
Vol 580-582 ◽  
pp. 557-560 ◽  
Author(s):  
J.G. Han ◽  
Kyong Ho Chang ◽  
Gab Chul Jang ◽  
K.K. Hong ◽  
Sam Deok Cho ◽  
...  
Keyword(s):  
Monitoring System ◽  
Three Dimensional ◽  
Measuring Method ◽  
Welding Residual Stress ◽  
Measuring System ◽  
Visual Monitoring ◽  
Test Error ◽  
Steel Members ◽  
Loading Tests ◽  
Visual Monitoring System

Recently, in the loading tests for steel members, the deformation value is measured by calculating a distance of both cross-heads. This measuring method encounters a test error due to various environmental factors, such as initial slip, etc.. Especially, in the case of welded members, the non-uniform deformation behavior in welded joints is observed because of the effect of welding residual stress and weld metal. This is mainly responsible for a test error and a loss of the reliability for used test instruments. Therefore, to improve the accuracy and the applicability of measuring system, it is necessary to employ a visual monitoring system which can accurately measure the local and overall deformation of welded members. In this paper, to accurately measure a deformation of welded members, a visual monitoring system (VMS) was developed by using three-dimensional digital photogrammetry. The VMS was applied to the loading tests of a welded member. The accuracy and the applicability of VMS was verified by comparing to the deformation value measured by a test instrument (MTS-810). The characteristics of the behavior near a welded joint were investigated by using VMS.

scholarly journals Geometric Measurements on a CNC Machining Device as an Element of Closed Door Technology

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4852
Author(s):  
Grzegorz Bomba ◽  
Artur Ornat ◽  
Piotr Gierlak
Keyword(s):  
Measurement System ◽  
Measurement Process ◽  
Cnc Machining ◽  
Measuring System ◽  
Cnc Machine ◽  
Statistical Process ◽  
Working Space ◽  
Closed Door ◽  
Accuracy And Repeatability

The article discusses the quality testing of a measuring system consisting of a CNC machine with measuring probes. The research was conducted in a broader context regarding the implementation of the closed door technology, i.e., production without human intervention, in an aviation plant manufacturing aircraft gearbox systems. This technology may involve automated measuring operations performed in machining centers, and not in measuring laboratories, provided that the quality of the measurements is appropriate. The aim of the study was to investigate whether the CNC machining device can be used to measure the geometric features of aircraft gearbox housing. For this purpose, measurement experiments were carried out with the use of three different probes. Measurements were carried out using four sequences of increasing complexity, so that, after error analysis, it was possible to find the causes of possible irregularities. A reference ring with known dimensions and position in the working space of the machine was used for the measurements performed as part of the assessment of the measurement system. The quality of the measurements was evaluated with the use of repeatability and reproducibility testing and statistical process control. The analysis results showed that the tested measurement system ensures adequate accuracy and repeatability, and the measurement process is characterized with adequate efficiency in relation to the manufacturing tolerance of the components produced using the machine. Thus, it was proven that the measurement process can be carried out on a machining device, which enables its integration into the closed door technology.

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