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State estimation is a critical functionality of energy management system (EMS) to provide power system states in real-time operations. However, problems such as failure to converge, prone to failure during contingencies, and biased estimates while system is under stressed condition occur so that state estimation results may not be reliable. The unreliable results further impact downstream network and market applications, such as contingency analysis, voltage stability analysis, transient stability analysis, system alarming, and unit commitment. Thus, operators may lose the awareness of system condition in EMS. This paper proposes a fully independent and one-of-a-kind system by integrating linear state estimator into situational awareness applications based on real-time synchrophasor data. With guaranteed and accurate state estimation solution and advanced real-time data analytic and monitoring functionalities, the system is capable of assisting operators to assess and diagnose current system conditions for proactive and necessary corrective actions. The architecture, building components, and implementation of the proposed system are explored in detail. Two case studies with simulated data from the subsystems of Electric Reliability Council of Texas (ERCOT) and Los Angeles Department of Water and Power (LADWP) are presented. The test results show the effectiveness and reliability of the system, and its value for realtime power system operations.

In this paper, a series of interface tests on interaction approach for the generation of geometric shape designs via multi-sensory user interface of a Virtual Reality (VR) based System is presented. The goal of these interface tests is to identify an effective user interface for VR based Computer-Aided Design (CAD) system. The intuitiveness of the VR based interaction approach arises from the use of natural hand movements/gestures, and voice commands that emulate the way in which human beings discuss geometric shapes in reality. In order to evaluate the proposed interaction approach, a prototypical VR-CAD system is implemented. A series of interface tests were performed on the prototypical systems to determine the relative efficiency of a set of potential interaction approach with respect to specific fundamental design tasks. The interface test and its results are presented in this paper.

SynchroPhasor measurement provides high resolution and time-synchronized data, which exposes the complex dynamics of the power systems across wide areas. Taking advantage of this technology, the Real-Time Dynamics Monitoring System (RTDMS ® ) Platform for on-line wide area dynamics monitoring has been developed by Electric Power Group. The platform utilizes an open and modular architecture and offers a suite of applications for real-time reliability monitoring, analysis and alarming. This paper provides an overview of the developed platform including system architecture, application function and visualization features.Index Terms-Phasor measurement units, power system dynamics, power system reliability, wide area measurement system.

Design For Assembly/disassembly (DFA) allows systematic evaluations and analysis of product assembly and disassembly during the product design stage with the goal of reducing assembly costs, improving quality and shortening time to market. These evaluations include assemblability, disassemblability, part accessibility, and part layout [1]. With the growing availability and widespread use of high bandwidth network and Virtual Reality (VR) technologies, the issues involved with product assembly, disassembly may be addressed and resolved effectively in a collaborative virtual environment over the Internet. In this paper, an analysis on the framework and definition of a collaborative virtual assembly and disassembly system, called Motive3D [2, 3], is introduced and examined using Unified Modeling Language (UML) [4]. UML is an Object Management Group’s (OMG) standard for object-oriented analysis and software design method, which allows specifying, constructing, visualizing, and documenting a distributed software-intensive system. Carrying out systematic analysis on the Motive3D system using UML, we believe that it expedites system development and will be possible to expedite the product design cycle and enable the assembly and disassembly process over Internet, and thus reduce the assembly and disassembly process bottlenecks.

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The Real Time Dynamics Monitoring System (RTDMS) has been developed to enable utilization of time-synchronized phasor measurements for reliability management with the overall objective of accelerating the adoption and fostering greater use of the technology within North America. Since 2003, it has been serving as a platform to translate research concepts and algorithms into actual applications for power system operators, reliability coordinators, and operating engineers both within the Eastern and Western Interconnections. The system supports an open, scalable and modular system design that adheres to a Server-Client architecture offering a suite of applications for wide-area real time visibility, monitoring and alarming on key metrics related to grid stress, dynamics, and the power systems proximity to instability, and performing offline forensic event analysis and baselining functions on normal operating conditions, limits and alarms. This paper provides an overview of the RTDMS system: its system architecture functionalities and applications.

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