Power Reliability Measurement Through a Very Low Cost Strategy (original) (raw)
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IEEE Industry Applications Magazine, 2005
NDUSTRIAL AND COMMERCIAL ELECTRICITY CONSUMERS are increasingly impacted by poor power quality and reliability (PQ&R). A utility distribution system fault, even hundreds of miles away, can cause widespread voltage sags that shut down susceptible process equipment [1]. Correlating process interruptions with voltage disturbances requires prompt notification of such PQ&R events. Effective communication with the utility company and assessment of mitigation equipment options are greatly facilitated when local historical PQ&R data are available, but only if the information is put in a form that the customer can act on. A Web-based, near real-time PQ&R monitoring system is continuing to be put in place to provide such information, both locally and on a nationwide basis [2]. Low-cost monitors record PQ&R event characteristics and, using an internal modem, transmit event data via the Internet to a central database. The database servers are a component of the system, and no additional hardware or software is needed by the end user. The monitor system infrastructure, shared by all monitor owners, provides capabilities for data aggregation and display, e-mail and pager notification, site administration, and summary reporting of the data using a Web browser. The system provides real-time notification of PQ&R events at single or multiple facilities and access to statistical information and trends related to PQ&R events as well as voltage regulation and imbalance. A principal goal is deployment of a vast network of monitors, which cannot be accomplished unless the monitors are affordable and the infrastructure is scalable.
A case of power assessment using a developed power quality monitor
2005
This work presents an example of a power quality assessment study in an electrical panel that supplies investigation laboratories, office rooms and an electronics workshop, using a developed Power Quality Monitor. The results of this study are analyzed using international standards as reference in order to determine the quality of the supplied energy. The technical specifications of the developed monitor are also portrayed, together with a summary of its applications.
Application of smart sensors to the measurement of power quality
2008 IEEE Instrumentation and Measurement Technology Conference, 2008
Today's businesses depend heavily on electrical services for lighting, general power, computer hardware and communications hardware. With the generalized use of sophisticated electronic devices, industries are shifting toward almost entirely electronic IT systems. PQ events are of increasing concern for the economy because today's equipment, particularly computers and automated manufacturing devices, is highly sensitive to such imperfections. Traditionally the control and supervision of a plant distribution network has mainly been focused on the protection of the network. Relatively little attention has been focused on the quality of the electrical energy. Metering technologies and communications systems have advanced to enable the development of web-based sensors. Power Quality is one area where these smart sensors can be very valuable. This paper investigates the challenges and possibilities in the development of distributed PQ measurement systems. This paper describes the challenges and lessons learned from this work.
International Industry Practice on Power-Quality Monitoring
IEEE Transactions on Power Delivery, 2014
Monitoring of voltages and currents at system buses gives the network operators information about the performance of their network, both for the system as a whole and for individual locations and customers. There is also demand from the customers and the regulatory agencies to provide information on the actual power-quality (PQ) level. Developments in enabling technology have made it possible to monitor at a large scale and to record virtually any PQ parameter of interest. While many network operators are installing monitoring equipment and while more and more monitors are available, there is a lack of knowledge and agreement on a number of aspects of the monitoring process and on processing the recorded data. As a response to this lack of uniformity in approach, data acquisition, and processing, in February 2011, CIGRE and CIRED established the Joint Working Group C4.112: "Guidelines for Power quality monitoring-measurement locations, processing and presentation of data." In order to identify the current international industry practice on PQ monitoring, the group carried out a survey in 43 countries across the world. This paper summarizes the key findings from 114 responses to the questionnaire and identifies prevalent industrial practice in PQ monitoring around the world.
Power Quality Issues : Monitoring & Measurement
2014
The growth of electricity market has seen a sea change in the sense consumers perceive electricity. The consumers have become more demanding. Power quality has been catching the attention of researchers worldwide. With the advent of more and more semiconductor based equipments, the power quality standards have been re written. This paper attempts to review the power quality issues including ways of monitoring power quality.
Power quality monitoring and sample size analysis beyond EN 50160 and IEC 61000-4-30
22nd International Conference and Exhibition on Electricity Distribution (CIRED 2013), 2013
Possibility for storing electrical energy in any significant quantity is very limited. Measurement and evaluation of the quality of the supplied Voltage (power) has to be made at the instant of its consumption. Power Quality analysis, monitoring and assessment is a very complex task, since the supplier and user, whose sensitive electrical equipment is also a source of disturbances, have different perspectives.
Power quality studies using a developed low cost power quality monitor
2006
This work presents two studies to evaluate the power quality in two facilities: a diagnosis centre in a Public Hospital and a simulation laboratory with a computer cluster, together with a printing centre and the air conditioning equipments of the Physics Department of a public University. Both these installations require a high level of power quality in order to avoid productivity losses as well as economic losses, and to maintain a high level of service quality. These studies will apply international standards to ascertain the power quality at these locations and will use a custom made prototype power quality monitor developed by the authors. It uses Hall effect voltage sensors, Rugowski Coil flexible current sensors and its processing system was developed with LabVIEW™.
RELIABLE POWER QUALITY MONITORING AND PROTECTION SYSTEM”
In restructured power market, power quality has a direct economic impact on both utilities and industrial customers. Therefore both the utilities and end users of electric power are becoming increasingly concerned about the quality of power. There is no generic solution for all of these problems. Testing of different PQ events is a difficult but very important step. It is also essential to identify the disturbance and clear the problem before it has caused widespread equipment malfunctions and other expensive consequences. So there is an ever increasing need for power quality monitoring systems due to the growing number of sources of disturbances in AC power systems. Therefore automatic detection, identification and classification of disturbances become a very important task. This system has been developed to monitor and detect any disturbance signals in power lines. If disturbance occurs in one of the phase, monitoring system will detect the fault The parameters sent over GPRS network and collected by remote side pc on real time basis where an application is developed using Matlab in which we can get monitoring data in graphical way. The Matlab shows the received data in terms of waveform where we examine power parameters easily.
Power Quality Issues: Monitoring & Measurement
2014
The growth of electricity market has seen a sea change in the sense consumers perceive electricity. The consumers have become more demanding. Power quality has been catching the attention of researchers worldwide. With the advent of more and more semiconductor based equipments, the power quality standards have been re written. This paper attempts to review the power quality issues including ways of monitoring power quality.