ICT Architecture Impact on Wide Area Monitoring and Control Systems' Reliability

IEEE Transactions on Power Delivery (Impact Factor: 1.73). 10/2011; 26(4):2801-2808. DOI: 10.1109/TPWRD.2011.2160879


Timely and accurate data with high resolutions holds great promise for more responsible and advanced power grid operations. The research has been focusing on design of monitoring and control scheme given the assumptions that the supporting information and communication technology (ICT) systems are capable of providing data and perform control with sufficient quality. A relatively less addressed aspect is the depen- dency of wide-area monitoring and control (WAMC) systems on their supporting ICT architecture which is usually a compromise between various concerns, such as data quality, interoperability, or security. Without an appropriate ICT architecture design, the projected WAMC system functionalities run the risk of being jeopardized. This paper begins with a presentation about pos- sible delays brought by complex data-transfer and processing processes. Analytical experiments are conducted with purposes to quantify the maximum delay and input signal's sensitivity toward delay on a typical WAMC application where the control of static var compensation (SVC) is coordinated with generator excitations using phasor measurements. Given the characteristics of this particular control scheme, two possible ICT architectures that provide data with different qualities are compared concerning the reliability of this WAMC application. This paper concludes by proposing a generic ICT architecture, enabling efficient WAMC systems implementation in terms of data quality.

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Available from: Kun Zhu, Sep 09, 2015
    • "Such a suggestion was made by simplifying the entire supporting ICT system as a router. In [3], the PMU communication delay profile was instead approximated by a normal distribution to illustrate the dependency of the control functionality on the capabilities of the underlying ICT systems. "
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    • "A similar work in [4] improves the synchronization mechanism based on DEVS formalism and integrated with NS2. Authors in [5] make an effort by integrating MATLAB Simulink and OPNET to study the reliability of wide area measurement system (WAMS) under information and communication architecture. An integration of virtual test bed software and OPNET in [6] is proposed to simulate distributed power electronic devices in a small-scale application. "
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    • "Dynamic simulation for WAMS applications PSCAD, PSLF, NS2 Time-stepped Good for large system No ADEVS[14] Dynamic simulation for WAMS applications Adevs, NS2 DEVS Limited, have to rewrite codes for different systems No [15] "
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    ABSTRACT: The vision of a smart grid is predicated upon pervasive use of modern digital communication techniques to today's power system. As wide area measurements and control techniques are being developed and deployed for a more resilient power system, the role of communication network is becoming prominent. Power system dynamics gets influenced by the communication delays in the network. Therefore, extensive integration of power system and communication infrastructure mandates that the two systems be studied as a single distributed cyber-physical system. This paper proposes a power system and communication network co-simulation framework (GECO) using a global event-driven mechanism. The accuracy is tunable based on the time-scale requirements of the phenomena being studied. This co-simulation can improve the practical investigation of smart grid and evaluate wide area measurement and control schemes. As a case study, a communication-based backup distance relay protection scheme is co-simulated and validated on this co-simulation framework.
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