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Synchrophasor technology was first introduced in 1980s. Since then, many electric utilities such as American Electric Power (AEP), Bonneville Power Administration (BPA), Southern California Edison (SCE), New York Power Authority (NYPA), as well as universities such as Virginia Polytechnic Institute (VPI), have been conducting R&D to explore and advance the application of synchrophasor technology...
The subject of the identification of the equivalent circuit parameters of large synchronous generators is revisited. The equivalent circuit of Park is used. On-line measurements are used in a Kalman filter to estimate the machine parameters. The formulation is linear and the extended Kalman filter is not needed. The approach is similar to that of Harley (1992), but flux linkages are not used in the...
The application of phasor technology is one of the most important next steps in the enhancement of power systems for smart grid technology. Phasor Measurement Unit (PMU) data is here and firmly established as vital to forensic studies. The electric utility industry is now moving at an accelerated pace with new initiatives to bring PMU data into the real-time fold. This panel paper highlights six areas...
By reporting time-synchronized phasor magnitudes and phase angles at rates at or above the system frequency, phasor measurement units promise to dramatically increase our ability to understand both historical and real-time power system conditions. This new information does not come without a cost, however, and one potential barrier to the effective utilization of this new data source is the increased...
The paper compares three different methods of inclusion of current phasor measurements by phasor measurement units (PMUs) in the conventional power system state estimator. For each of the three methods, comprehensive formulation of the hybrid state estimator in the presence of conventional and PMU measurements is presented. The performance of the state estimator in the presence of conventional measurements...
Calculating the reliability of the power grid is difficult because it is made up of thousands of components and even though the failure mode of each component may be known, they are not independent of each other. Thus the models required to conduct reliability analysis are difficult to develop and are often complex enough to make the techniques for analysis very cumbersome. Usually controllers like...
Phasor measurement units (PMUs) were installed in an industrial distribution network and synchronized measurements taken from the PMU at medium and low voltage during different system states were analyzed. Two cases of system operation were investigated, normal and abnormal operation. Results from up to six PMUs were compared and analyzed for each case.
With growing applications for protection, control, monitoring and measurement systems for power system applications, the necessity for very reliable and accurate frequency and phase angle measurement of the power system voltage is also growing. This paper describes a linear phase locked loop for three phase systems for precise measurement of the frequency and phase angle of the line voltage. However,...
This paper describes research in progress for a panel session presentation on how phasor measurement unit (PMU) values can be used to improve power system operations beyond their use in state estimation.
Smart grid technologies for the high voltage power grid usually refer to (1) the new sensors that can sample voltages and currents at very fast rates and calculate their phase relationships by coordinating with aGPS time signal, (2) the high bandwidth communications that can move this voluminous measurement data to monitoring and control stations, and (3) fast controllers like breakers and power electronic...
With the advancement of sensor, communication and information technologies, Wide Area Monitoring, Protection and Control (WAMPAC) systems have been identified as the new generation of solutions to improve power system planning, operation, and maintenance. With huge amount of real-time data collected through distributed sensors deployed in a wide area, effective information presentation has become...
Synchronized measurements offer an opportunity for the wide area monitoring of power systems. There is an international trend in installing synchronized measurement devices and attempting to incorporate them in operational practices. This panel addresses international developments and research activities in the installation and use of synchronized measurement devices in power systems. The views of...
In this paper we report on the preliminary results of a collaborative investigation effort between researchers in North America and Europe aiming to baseline the electromechanical modes and mode shapes of the Nordic system from synchronized phasor measurement data. We provide an overview on the Danish power grid and its interconnections, and describe the features of an experimental phasor measurement...
This paper presents some comparisons between the trends in electricity infrastructure growth in the United States and Brazil, and attempts to identify commonalities and differences on grid modernization efforts in these two countries using the Smart Grid Initiative as a template.
This paper presents the idea and initial results of building decision trees (DTs) for detecting and identifying various transient dynamic events using the characteristic ellipsoid method. In this paper, the objective is to determine fault types, fault locations and clearance times in the system using DTs based on ellipsoids surrounding system transient responses in the system operating parameter space...
The instrument transformer is the necessary equipment which connects the primary power system and PMU. Therefore, the measurement accuracy of PMU is directly affected by the transfer accuracy and the transient response of instrument transformer. In this paper, the dynamic signal models are abstracted from the phenomena of practical power systems. Under such kinds of dynamic signal models, the impact...
In this paper, an Artificial Neural Network (ANN) based method is developed for quickly estimating the long-term voltage stability margin. The investigation presented in the paper showed that node voltage magnitudes and the phase angles are the best predictors of voltage stability margin. Further, the paper shows that the proposed ANN based method can successfully estimate the voltage stability margin...
Preliminary results from an investigation on the application of dynamic power flow controllers to a stretch of the Qatar Transmission System (QTS) along the western coast of Qatar. The main objective of applying the power flow controller is to maintain balance of power flow between the networks or lines that supply to this weaker region of the QTS, and in turn support network security should the demand...
In this paper, data acquired by synchronized phasor measurement systems are used for the system wide validation of models and data of the Brazilian Interconnected Power System (BIPS). Data acquired by two prototypes, the LVPMS, with PMUs (Phasor Measurement Units) installed in nine universities throughout Brazil and the HVPMS, with PMUs installed at four substations in a transmission utility, were...
This paper describes a new approach that led to the development of a fully distributed state estimator, named the SuperCalibrator (SC). The SC is a three-phase state estimator that operates at the substation level and requires at least one PMU at each substation. The computed substation state estimate is transferred to the control center where the overall system state is synthesized from the substation...
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