Power quality and metering monitoring applications for smart network operations (original) (raw)
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Integrated Power Quality Monitoring Systems in smart distribution grids
2012 IEEE International Energy Conference and Exhibition (ENERGYCON), 2012
The smart distribution grids will have to supply the electricity according to power quality standards. Various measurement instruments, currently considered as cornerstones of smart grids (smart meters, protection relays, fault recorders etc.), do not measure all the power quality parameters specified in these standards. Some distribution system operators are already installing Power Quality Monitoring Systems (PQMS), based on fixed power quality monitors. The aim of this paper is to present the possibility of integrating power quality data from PQMS system, AMR/AMI (Automatic Meter Reading/Advanced Metering Infrastructure) system and all the other systems in the distribution network, into an Integrated Power Quality Monitoring System (IPQMS). The results of pilot projects conducted in the Public Electric Utility Elektroprivreda of Bosnia and Herzegovina, in order to test the three power quality monitoring systems, are also presented. The possibility of using data from smart meters in power quality monitoring was analysed.
Integrated power quality monitoring system and the benefits of integrating smart meters
2013 International Conference-Workshop Compatibility And Power Electronics, 2013
Because of the regulatory requirements for the quality of electricity supply being imposed in many countries, power quality is ought to be an important aspect of smart distribution grids. In this context, there is a need for the Integrated Power Quality Monitoring System, which would integrate all the power quality data available from various systems of smart distribution grid, such as Power Quality Monitoring System, Automated Meter Reading/Advanced Metering Infrastructure, Supervisory Control and Data Acquisition, Electric Vehicle Management System etc. In this paper the power quality data management role of Integrated Power Quality Monitoring System is presented. Instead of accumulating all the historical data, the Integrated Power Quality Monitoring System should collect only data from the measurement devices in the affected area, needed for analysing the propagation and the source of the disturbances. The benefits and challenges of using smart meters for power quality monitoring are discussed in this paper in more detail. Also in this paper, the results of laboratory tests of power quality capability of a single smart meter are presented. The comparison of measurement between a power quality instrument and several smart meters for the example of one real medium voltage/low voltage network is presented, with the special focus on the distribution of voltage harmonics.
Power quality monitoring systems for smart grid networks
2013 8TH INTERNATIONAL SYMPOSIUM ON ADVANCED TOPICS IN ELECTRICAL ENGINEERING (ATEE), 2013
The momentum of today is focused on smart grid facilities that allow green energies to be used in electrical networks. But an important issue is to have powerful tools at hand able to measure power quality parameters in a flexible way in such grids. This paper present a flexible system designed and implemented to monitor power quality parameters in the power grid. Not only real time monitoring was taken into account but also a build-in database was designed for inspections and long term statistics. Different measurement standards can be used in order to provide flexible information in energy measurements. I.
Upgrading smart meters as key components of Integated Power Quality Monitoring System
Power quality is one of the important challenges for the smart distribution grids. It is not possible to know the state of power quality in the network without appropriate measurements or monitoring. As an answer to need for power quality monitoring in smart distribution grids, this paper further develops the Integrated Power Quality Monitoring System (IPQMS). IPQMS integrates power quality data from all the measurement devices available in the smart distribution grids: power quality monitors, portable power quality analyzers, smart meters, protection relays, fault locators etc. Smart meters are the key sensors in smart distribution grids and should be used as indicators of power quality disturbances in IPQMS. The complementary use of power quality monitors and smart meters in IPQMS should enable the analysis of the propagation of power quality disturbances throughout the distribution network. Current state-of-the-art smart meters have certain capabilities regarding the monitoring of some power quality parameters. The necessary upgrades to the state-of-the-art smart meters regarding their power quality monitoring capabilities are discussed in this paper in the context of their role in IPQMS. This paper elaborates in detail one new concept of operation and process algorithms for IPQMS, with special emphasis on smart meters. This paper also presents experimental results of integrated power quality monitoring using power quality monitors, state-of-the-art smart meters and protection relays. The presented experimental results prove that with integrated power quality monitoring, distribution system operators can get a complete information about power quality in their networks.
Power quality issues and need of intelligent PQ monitoring in the smart grid environment
2012 47th International Universities Power Engineering Conference (UPEC), 2012
PQ issues are very much important for utilities, customers and end users and it is essential to be known by the concerned authorities and users for reduction of economic losses due to the poor PQ. The cost of poor PQ is high and rising. The paper gives insights on global economical losses due to poor PQ. The business risk posed by PQ problems is a real one with even 'low tech' industries exposed to serious financial losses. The global economic meltdown is not the only factor that is pulling down the revenues of Asian countries. A study released said Indian industries lost more than $ 9.6 billion in 2008-09 due to power outages. According to 2008 reports, poor power quality costs European business more than 150 billion dollars a year. In this paper, a comprehensive survey on different power quality related problems as experienced by customers in different countries are highlighted. Summary of PQ costs are given. As the consequence of poor PQ might have large financial impacts on a country's economy, more initiatives are expected from the concerned parties and regulating bodies to take corrective measures for maintaining better power quality from utility and at end users. Smart grid requires intelligent PQ monitoring to solve different PQ related problems. Authors proposed an intelligent power quality monitoring system that will help to detect different PQ disturbances and consequently assist in employing or implementing appropriate mitigation techniques.
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.
IET Generation, Transmission & Distribution, 2011
In this study, a nationwide real-time monitoring system has been developed to monitor all electrical quantities and power quality (PQ) parameters of the electricity transmission network including its interfaces with the generation and distribution systems. The implemented system is constituted of extended PQ analysers (PQ + analysers), a national monitoring center for power quality (NMCPQ), and the PQ retrieval and analysis software suite. The PQ + analyser is specifically designed for multipurpose usage such as event recording and raw data collection, in addition to the usual PQ analysis functions. The system has been designed to support up to 1000 PQ + analysers, to make the electricity transmission system and its interfaces completely observable in the future. The remote monitoring, analysis and reporting interface, the map-based interface, and the real-time monitoring interface, as well as the Web applications run on the NMCPQ servers, can be accessed by the utility, large industrial plants, distribution companies and researchers, to the extent of the authorisation given by the transmission system operator. By activating sufficient number of analogue and digital outputs of PQ + analysers, and equipping the NMCPQ with necessary hardware, analysis and decision making software, the proposed system can serve as an advanced supervisory control and data acquisition system in the future. The proposed monitoring concept can be extended to serve the needs of the modern electricity markets, by making various regulations, codes and instructions implementable.
Integration of Power Quality Monitoring System in Croatian Distribution Network
2011
Power market liberalization meant that power quality (PQ) became a market commodity, bringing more attention to its monitoring and necessary improvements in the infrastructure. Up until now, power quality monitoring was conducted only if a consumer would complain and then it was done by mobile measurement devices. Although some of the newly installed distribution substations have the necessary equipment to remotely supervise quality power quality, there is no systematic monitoring or processing of the same ones. Research and implementation projects around Europe do not propose a solution where existing infrastructure is optimally used for this purpose. Presented paper gives a original solution for fulfilling regulatory requirements for entire system monitoring of power quality.
Design aspects for large PQ monitoring systems in future smart grids
2011 IEEE Power and Energy Society General Meeting, 2011
Power quality (PQ) has become a non-negligible issue for DNOs. More and more sites are being monitored permanently throughout their networks covering almost all voltage levels. Due to the continuously increasing number of measurement sites, certain issues become more and more evident. PQ analyzers usually run only in combination with proprietary software and data transfer methods. The interoperability between different brands is very limited. The efficiency of data handling and data analysis decreases significantly with growing number of measurement sites.