ICT Architecture Impact on Wide Area Monitoring and Control Systems' Reliability
ABSTRACT 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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ABSTRACT: Todays electric power distribution systems are very complex and power systems restructuring also has introduced new complexities in controlling of these systems. Multi agent systems (MAS) are one of the popular approaches to improve the efficiency, reliability and safety through automated distributed control and modern communication technologies in power systems. A multi agent system structure could be centralized, hierarchical or distributed and communication system plays a key role in establishing any control strategy using multi agent systems. This paper presents a comparison between wired and wireless communication media performance in self-healing power distribution systems. Power systems dynamics gets influenced by the communication delays in the network and the purpose of this work is to study the effect of communication media on different multi agent system structures used in literature, in order to determine the suitable MAS and media choices for power distribution networks. The comparison criteria are delay (latency) and reliability of each communication media. In this study an existing Mon Power circuit is used as test network. Matlab® Simulink software and S-functions (user-defined functions) are used to integrate the power system and communication network models and build a co-simulation framework for this study.Energytech, 2013 IEEE; 01/2013
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ABSTRACT: With the advent of the concept of smart-grid, the power system infrastructure is being equipped with high-bandwidth data communication and embedded computing infrastructure. The communication infrastructure has gained importance in the transmissions subsystems due to increasing use of the wide area measurement and monitoring using Phasor measurement units (PMUs). The amount of data collected by PMUs is large and they need to be transferred to regional and global data centers where real-time state estimation, and protection, stabilization decisions are made. As a result, having sufficient bandwidth in the communication infrastructure as well as proper delay characteristics will matter in the correct operation of these various wide area measurement system (WAMS) based control schemes. We have created a communication and power system co-simulation infrastructure called GECO which allows us to co-simulate power systems dynamics along with the communication network activities in a more realistic manner than past simulation environment. In this paper, we consider the effect of the appropriate network topology, bandwidth, delay etc. on two PMU based WAMS applications, namely All-PMU monitoring, and out-of-step protection. These experiments not only show the efficacy of the GECO framework in planning the smart grid communication infrastructure, it also provides case studies on how to go about using GECO in smart-grid design activities.Power and Energy Society General Meeting, 2012 IEEE; 01/2012
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ABSTRACT: A reliable and adequate communication network is crucial for smart grid applications. It is important to evaluate the performance of network infrastructure with respect to the diverse requirements imposed by various smart grid applications to ensure system reliability. Due to the complex dynamics involving communication and electrical systems, analytical study on smart grid faces challenges. As a result, comprehensive simulation platforms are needed for the study of interdependency between the heterogeneous systems. In this paper, we discuss the design of our smart grid co-simulation platform which combines power system simulator PSCAD/EMTDC with network simulator OPNET. In addition, we report a case study on Vehicle-to-Grid (V2G) voltage support application with respect to WiMAX / WiFi vehicle-to-infrastructure scenarios.Smart Grid Communications (SmartGridComm), 2013 IEEE International Conference on; 01/2013