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.
- SourceAvailable from: Lamine Mili[Show abstract] [Hide abstract]
ABSTRACT: In this paper, we describe our global event-driven co-simulation framework GECO that we developed to co-simulate power systems dynamics with data network activities. The GECO framework utilizes global event scheduling across two different simulators with distinct simulation disciplines --to eliminate common synchronization errors often found in federated simulation platforms. We also illustrate the use of the GECO framework on two PMU-based WAMS applications: cyber-attacks impacts analysis on all-PMU state estimation, and PMU-based out-of-step protection. The experimental results described in this paper not only show the efficacy of the GECO framework but also illustrate the utility of GECO in WAMS modeling and simulation.Workshop on Modeling and Simulation of Cyber-Physical Energy Systems 2013, Berkeley, CA; 05/2013
- [Show abstract] [Hide abstract]
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.IEEE Transactions on Smart Grid 09/2012; PP(3-99):1 -13. DOI:10.1109/TSG.2012.2191805 · 4.33 Impact Factor
- [Show abstract] [Hide abstract]
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