Scribd is the worlds largest social reading and publishing site. Synchronized phasors synchrophasors provide a realtime measurement of electrical quantities from across the power system. The mission of the north american synchrophasor initiative naspi is to improve power system reliability and visibility through wide area measurement and control, by fostering the use and capabilities of synchrophasor technology. Synchrophasors are precise grid measurements available from monitors called phasor measurement units pmus. Prakash ranganathan, technical report on orthogonal transforms, masters degree thesis, north dakota state university, 2004. Microsoft powerpoint ieee synchrophasor presentation boston june 21 2011 v2. Synchrophasor technology advancement in arra projects. These systems are made possible by two way digital communications technologies and computer. With new advances in processing and equipment, synchrophasors are now used to solve a variety of power system protection, automation, and control problems. Outofband interfering signals outofband signals are those signals occurring on the power system that typically fall in the 0 to 60 hz range, but specifically those signals that will be aliased if the reporting phasor data rate is too slow for the phenomena being observed. Realtime snapshots of grid frequency and many more types of streaming data are made available. Synchrophasor technology tutorial lecture 1 youtube. Pdf the presentation provides an overview of synchrophasor technology, its application and future scope.
This is the ability to collect synchrophasor data from pmus and send the data to. Basically a solidstate relay or digital fault recorder with gps clock. Angle and frequency monitoring postmortem analysis disturbances and system failures voltage and voltage stability monitoring improved state estimation steadystate benchmarking. Wide area monitoring, protection, and control systems. Save powerpoint presentations as pdf files office support. When you save presentation as a pdf file it freezes the formatting and layout. Synchrophasor fundamentals north american synchrophasor. Microsynchrophasor data for diagnosis of transmission and. Being different from the gps signal which continuously feeds the processor, the ntp timing information is only available when the monitoring device sends a request to the remote ntp server. Smart grid seminar university of california, san diego. One example obtained by the web interface of the fnetgrideye synchrophasor deployment is presented in.
Click create pdf xps document, then click create pdf xps. They give operators a nearrealtime picture of what is happening on the system, and allows them to make decisions to prevent power outages. Synchrophasors schweitzer engineering laboratories. Smart grid topic 2 smart grid department of electrical. Model validation using synchrophasors naspi technical workshop october 20 pdf sychrophasor technologies and their deployment in the recovery act smart grid programs august 20 pdf recipient documents. Synchrophasors take highspeed measurements of voltage, current and frequency. Phasor measurement units and wide area monitoring systems. In addition, it includes a complete theory and practice of pmu technology development and.
Figure 1 sending synchrophasors to scada using an sel3354 the second method, shown in figure 2, uses one of the many features of the new sel3530 realtime automation controller rtac. Microsynchrophasor data for diagnosis of transmission and distribution level events lawrence berkeley national laboratory. Synchrophasors are a flexible tool state measurement disturbance recording modal analysis dynamic response measurement and highspeed protection and control. This is the ability to collect synchrophasor data from pmus and send the data to scada systems using modbus or dnp3 protocols. Datadriven cyberphysical systems via realtime stream. Synchrophasors or phasor measurement units, pmus on the other hand, provide a much better insight into the state of the smart grid and in turn help optimize grid efficiency and stability. A device that produces synchronized measurements of phasor i.
Sergel has said synchrophasors are like the mri of the bulk power system 1. Observability and estimation methods using synchrophasor. A synchrophasor is a phasor that is time stamped to an extremely precise and accurate time reference. Synchrophasors have enhanced widearea visualization and situational awareness of power system behaviour under steady state as well in transientdynamic conditions 1, 2, 3. Prakash ranganathan, effective elearing tricks and strategies in online and hybrid courses, 7th european conference on elearning, nov 68 2008, agia napa, cyprus. Integrating synchrophasor technology into power system. Integrating synchrophasors and oscillography for widearea. Introduction as the electric power grid continues to expand and as transmission lines are pushed to their operating limits, the. Synchrophasorbased power system protection and control. Integrating synchrophasors and oscillography for widearea power system analysis dora nakafuji hawaiian electric company laura rogers hawaii electric light company. Phasorbased approach for harmonic assessment from multiple. Lu et al microgrid monitoring system over mobile platforms 751 fig. Analysis of the main sgig synchrophasor related projects, indicate that the center of gravity for synchrophasor applications is moving is towards the integration of th technology to ems at the the control center. About naspi north american synchrophasor initiative.
Jared bestebreur, michael rourke, and greg zweigle. Introduction to synchrophasors on demand training from electric power group. Synchrophasors installers defense enterprise airports synchronization access lte certification troubleshooting synchronization ptp emulation set up ptp c37. Strobe light analogy 0 o 3 0 o 6 0 o 90o 1 2 0 o 1 5 0 o3 0 o6 0 o90o1 2 0 o 1 5. A synchrophasor is a phasor measurement with respect to. This paper was presented at the ieee pes transmission and distribution conference and exposition held may 25, 2016 in dallas, tx. Synchrophasors phasor measurements with phase angles referenced to a global time standard coordinated. Pdf experiences of synchrophasor initiative in india researchgate. Synchrophasors and next generation energy management. Phasor measurement units and wide area monitoring systems presents complete coverage of phasor measurement units pmus, bringing together a rigorous academic approach and practical considerations on the implementation of pmus to the power system. Arun phadke and jim thorp may 9th, 20 manu parashar. The concept of using phasors to describe power system operating quantities dates back. People can view the slides even if they dont have powerpoint, but they cant make changes to it.
In short, pmus measure voltage, current and frequency and calculate phasors, and this suite of time synchronized grid condition data is called phasor data. Advanced transmission applicationsfor synchrophasors. Pmu definition pmu definition as stated in ieee std. Synchrophasors and the smarter grid ieee pes boston chapter. Lawrence jones vice president utility innovations and infrastructure resilience alstom gridinc. Big data to big information optimizing transactive controls in hybrid power grids dr. Pmu measurements record grid conditions with great accuracy and offer insight into grid stability or stress. Alexander general electric co malvern, pa introduction distance functions have been in use for many years and have progressed from the original electromechanical types thr ough analog types and now up. In the publish as pdf or xps dialog box, choose a location to save the file to. Portland general electric asset management advanced system models risk assessments. Phasor measurement unit pmu a transducer that converts threephase analog signal of voltage or current into synchrophasors.
Time synchronization is usually provided by gps and allows synchronized realtime measurements of multiple remote points. But monitoring and postevent analysis are only the first applications of synchrophasors. Iec tr 61850905 has normative references to ieee c37. Synchrophasors are currently being used by utilities around the world for system model validation, situational awareness, stability analysis, islanding detection, disturbance analysis, and widearea measurement and control. Synchrophasors introduce the concept of timesynchronized measurements, utilizing the precise time signal from gps global positioning system satellites. Synchrophasors and next generation energy management systems ems celebrating the visions of synchrophasor pioneers. Synchrophasor technology tutorial lecture 4 duration. Introduction to synchrophasors electric power group. To meet these challenges, utilities are implementing a new technology using synchrophasors, a very precise method of monitoring the state of the system in real time. The rf signal is transmitted from the probe coil which creates an rf field around the probe tip. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
Examples of system disturbances will also be presented. Based on a number of the current major synchrophasor technology. Synchrophasors and the smarter grid ieee pes boston. Summer weather 2015 seminar week5 apr 24, 2015 ppt. The resultant time tagged phasors can be transmitted to a local or remote.
Synchrophasor technology is used for realtime operations and offline engineering analyses to improve grid reliability and efficiency and lower operating costs. Montreal ring james bay generating area 1,300 kms 808 miles from montreal manic generating area 700kms 435 miles from montreal. Synchrophasors strobe light analogy 0 o 3 0 o 6 0 o 90o 1 2 0 o 1 5 0 o3 0 o6 0 o90o1 2 0 o 1 5 0 o 180 o n s. Each phasor measurement is time stamped against global positioning system universal time. The measurements, typically taken 30 times a second, are timestamped with signals from global positioning system satellites, enabling data from different locations and utilities to be timesynchronized and combined to create a detailed, comprehensive view of the broader system. I am pleased to present the 201 8 smart grid system report, which is intended to provide a status of smart grid deployments nationwide, resulting benefits, and the challenges yet remaining as we move forward with the modernization of the electric grid.
Then, an unscented kalman lter ukf is introduced as a tool to estimate the states that are not directly measured by synchrophasors. Microsoft powerpoint defining the pathway to the calfiornia smart grid of 2020 for 102108. A phasor measurement unit pmu is a device used to estimate the magnitude and phase angle of an electrical phasor quantity such as voltage or current in the electricity grid using a common time source for synchronization. Measuring synchrophasors using pmu anti aliasing filter restricts bandwidth of signal to satisfy sampling theorem gps time tagging provides a time stamp for the signal phase locked oscillator keeps frequency of the reference and measured signal equal. Synchronized phasors synchrophasors provide a realtime measurement of electrical quantities across the power system. Sel offers a wide variety of solutions to fit your application. Applications include widearea control, system model validation, determining stability margins, maximizing stable system loading, islanding detection, systemwide disturbance recording, and visualization of dynamic system response. Pqube 3 drives all research projects on microsynchrophasors. Synchrophasors compare the phase angle of the voltage at two different locations. Pdf experiences of synchrophasor initiative in india. Smart grid defined us doe definition of smart grid smart grid generally refers to a class of technologies that people are using to bring utility electricity delivery systems into the 21st century, using computerbased remote control and automation.
Defining the pathway to the calfiornia smart grid of 2020 for. Vendors see the future of synchrophasor protection lying with the development of new ras and safety net schemes, outofstep protection, distributed microgrids, backup to existing. Whether you are working with individual units or a. Clustering algorithms for streaming openpdc data sets. Oge presentation, entergy presentation and many others. We demonstrate the methodology developed in this paper using a 9bus model with three. Synchrophasors phasor measurement units pmus a synchrophasor is a sophisticated monitoring device that can measure the instantaneous voltage, current and frequency at specific locations on the grid. Time synchronization is usually provided by gps and allows synchronized realtime measurements of multiple remote points on the grid. Feb 11, 2011 to meet these challenges, utilities are implementing a new technology using synchrophasors, a very precise method of monitoring the state of the system in real time. Visualization and mining of phasor data from optimally.
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