ICIIS 2021

11th December 2021 at 8.30 am (Sri Lanka time)

Abstract of the workshop: The nature of modern power grids is changing to incorporate growing number of embedded power electronic devices resulting in low system inertia and various control interactions, often making them more susceptible to catastrophic power failures. Thus, advanced monitoring, protection and control systems are required to ensue secure, safe, and reliable grid operation. Synchrophasor technology uses monitoring devices, called phasor measurement units, which take high-speed measurements of phase angles, voltage and frequency that are time stamped with high-precision clocks. The technology offers great advantages in deploying wide-area measurement bases control and monitoring of the grid and helps detection of the problems in the network in the early stages. This workshop provides brief introduction to the technology and highlights several examples of monitoring, protection, and control applications with some discussion on implementation challenges and potential solutions.

Resource person 1: Prof. Athula Rajapakshe, University of Manitoba, Canada
Title of the talk: Wide-area monitoring, protection, and control with synchrophasor technology
Abstract: Synchronized phasor measurement technology allows the development of Wide Area Monitoring, Control and Protection applications that improve the security and reliability of power systems that are evolving to be heavily dependent on renewable energy generation. This tutorial will provide introduction to the basic definitions and different elements in a synchrophasor networks including Phasor Measurement Units (PMU), Phasor Data Concentrators (PDC), and communication systems. Various standards related to the synchrophasor measurements and communication will be briefly discussed and a few potential applications of wide area synchrophasor measurements will be presented.
Biography: Dr. Athula Rajapakse is a professor at the Department of Electrical and Computer Engineering of the University of Manitoba, Canada, and leads the Intelligent Power Grid Laboratory. He obtained a B.Sc. (Eng.) degree from the University of Moratuwa, Sri Lanka, an M.Eng. degree from the Asian Institute of Technology, Bangkok, Thailand, and a Ph.D. degree from the University of Tokyo, Japan. His research interests include power system protection, wide area protection and control, protection of future HVDC grids, and grid integration of renewable energy. He is a senior member of IEEE, a registered Professional Engineer in the province of Manitoba, Canada, and a Fellow of Engineers, Canada. Dr. Rajapakse is a member of several IEEE and the Cigre Working Groups, and currently serve as the convener of Cigre/IEEE joint working group C4/C2.62 on review of advancements in synchrophasor technology and applications.
Resource person 2: Dr. Prasad Wadduwage, University of Moratuwa, Sri Lanka
Title of the talk: Power System Oscillations Monitoring using PMU
Short abstract: Presence of oscillations subjected to disturbances is a characteristic of a dynamic system. Power systems also exhibit oscillations subsequent to disturbances in the range of low-frequency inter-area oscillations to sub-synchronous and even super-synchronous oscillations. The Synchrophasor data facilitates the monitoring of these oscillations at a central location allowing the system operator to see the present status and initiate preventive control actions whenever necessary. A brief overview of power system oscillations, the use of Synchrophasor data to monitor those and the associated challenges will be presented during this discussion.  
Biography: Dr. W. D. Prasad received the B.Sc.Eng. and the M.Phil. degrees in electrical engineering from the University of Moratuwa, Moratuwa, Sri Lanka, in 2005 and 2007, respectively, and the Ph.D. degree from the University of Manitoba, Winnipeg, MB, Canada, in 2016. He is currently a Senior Lecturer with the Department of Electrical Engineering, University of Moratuwa. His research interests include power system stability and control, power system modeling, and applications of phasor measurement units in power systems.  
Resource person 3: Prof. Prof. Anil Kulkarni, IIT Bomday, India
Title of the talk: Wide-Area Damping Control in Power Systems
Abstract: With the advent of better communication and time-synchronization, the use of wide-area measurements for feedback controllers and system protection schemes can be contemplated. One motivation for using wide-area measurements is the possibility of synthesizing signals in which the targeted modes are near-exclusively observable. However, unlike schemes which use local feedback signals, wide-area schemes are prone to communication delays and reliability issues. In this talk, some closed-loop schemes will be presented, and the prospects and challenges in their application will be brought out.
Biography: A.M.Kulkarni a Professor in the Electrical Engineering Department, IIT Bombay India. He obtained his BE degree in Electrical Engineering from the University of Roorkee, India in 1992, and his ME and PhD degrees in 1994 and 1998 respectively, from the Indian Institute of Science, Bangalore. His broad areas of interest are in Power System Dynamics, HVDC and FACTS. Recently, he has focused on Wide Area Measurement Systems (WAMS). He has worked closely with utilities in India on several projects, including the PSS tuning exercise in the Eastern and Western regional grids and Sub-synchronous resonance studies. His current focus is on the use of WAMS for stability and control.
Resource person 4: Dr. Anton Hettiarachchige-Don, SLIIT, Sri Lanka
Title of the talk: The problem with PMU parameter estimation.
Abstract: The worldwide push for a “smarter” power grid has motivated utilities into investing heavily in a range of next-generation grid monitoring technologies. In the transmission space, this advancement is predominantly in the use of Synchrophasor Measurement Units (PMUs) that provide “near-real-time” observability of transmission lines. For their basic functionality, PMUs operate as expected. However, attempts by utilities to extrapolate additional information, such as highly valuable line resistance estimations, from the received PMU data have proven to be largely unsuccessful. This is due to the inherent errors introduced by PMU devices in the form of Total Vector Error (TVE) and their hidden effect on calculations made using PMU data. A wide verity of techniques, with varying degrees of success, have been proposed in literature to overcome this issue. However, due to the randomness of the effect, purely statistical approaches have been proven to be insufficient. Therefore, newer, machine learning based approaches are now finally making some headway in this effort. Availability of accurate resistance estimations as well as other system parameters using PMU data would allow utilities to have greater observability over their networks and enable real-time decision making with greater confidence. In short, it would allow utilities to compound the benefits of their investment into PMUs.
 Biography: Anton Hettiarachchige-Don is currently a Senior Lecturer at SLIIT in the electrical and electronic engineering department. He graduated with a Ph.D. in electrical engineering from Wichita State University in Kansas USA. He completed his Bachelors in Engineering Technology at Southeast Missouri State University and his Masters in Electrical Engineering also at Wichita State University. His area of research is in advanced wide area monitoring of the electric grid system using new age measurement technologies and algorithms.