International Experiences in synchrophasor applications

Date: Wednesday, May 26                              Time:

Name of the organizer: Mladen Kezunovic, Regents Professor


Organisation: Texas A&M University, USA

Short biography of the chair: Mladen Kezunovic (S’77–M’80–SM’85–F’99– LF’17) received the Dipl. Ing. from University of Sarajevo, Sarajevo, Bosnia, and M.Sc. and Ph.D. degrees in electrical engineering from University of Kansas, Lawrence, KS, in 1974, 1977, and 1980, respectively. He has been with Texas A&M University, College Station, TX, USA since 1986, where he is currently Regents Professor, Eugene E. Webb Professor, and the Site Director of “Power Engineering Research Center” consortium. For over 25 years he has been the Principal Consultant of XpertPower Associates, a consulting firm specializing in power systems data analytics. His expertise is in protective relaying, automated power system disturbance analysis, computational intelligence, data analytics, and smart grids. He has authored over 600 papers, given over 120 seminars, invited lectures, and short courses, and consulted for over 50 companies worldwide. Dr. Kezunovic is a CIGRE Fellow, Honorary and Distinguished member. He is Registered Professional Engineer in Texas.

Abstract: Deployment of phasor measurement units (PMUs) in the US grid has surpassed 3,000. Other countries such as China, Russia and India are deploying PMUs at a rapid pace widely as well. Combined, the mentioned countries have deployed or are planning to deploy over 10,000 PMUs so far. This panel will be focused on the discussions of how the synchropahsor systems are used today to monitor, control and protect power system. The representatives from the USA, China, Russia and India will discuss their experiences and share the lessons learned.

Panelist 1:

Name: Dmitry Dubinin

Organisation: System Operator of United Power System of Russia – Head of the Wide Area Monitoring Division, Russia

Title of presentation: Synchrophasor application experience in Russia

Abstract: The presentation describes the creation and current deployment of WAMS in Russia. The implementation of the automated PMU data acquisition system in 22 control centers of the System operator will be considered. The following issues will also be discussed: a) deployment in control centers of synchrophasor applications: online low frequency oscillation monitoring, System for Monitoring the Operation of System Regulators, b) 3D-visualization, data quality monitoring, c) PMU&PDC certification procedures in Russia; d) prospects for the development of new synchrophasor applications.

Panelist 2:

Name: Huafeng Zhou

Organisation: China Southern Power Grid, Power Dispatching & Control Center – Vice Director of Automation Division, China

Title of presentation: Experiences and future development for synchrophasor technology

Abstract: The presentation will discuss: (1) State-of-the-art Experiences: a) Online monitoring: Voltage stability monitoring, Hybrid state estimation, Oscillation detection & wide area monitoring, Frequency disturbance event detection, Islanding detection, b) Parameter identification: Generator model validation, Load model validation, Network validation and topology estimation, c) Post-event analysis: Low frequency oscillation analysis, Accurate fault positioning and restoration, and d) Application in distribution network: Integrating renewable and distributed resources, Automatic controls of demand response, Automatic fault positioning of distribution network, Power quality analysis; and (2) Future development: a) Power system wide-frequency measurement technology: Able to monitor and measure low frequency oscillation, subsynchronous oscillation, hyper-synchronous oscillation and 100-300Hz wide-frequency oscillation, b) Multi-functional measurement and control device: A multi-functional device which integrates PMU, metering unit, measurement and control unit, and c) 5G and PMU: Using 5G mobile network for high speed, high frequency and high precision PMU data transmission.

Panelist 3:

Name: Teboho Machabe

Organisation: Transmission System Operator, ESKOM – Senior Engineer, South Africa

Title of presentation: The Advantages of PMU Data Analytics in Power Systems with High Renewable Energy Penetration

Abstract: Renewable energy sources are mostly inverter based generators that harness either the solar radiation or the energy in the wind for the production of electrical energy. Inverter based energy sources have very little inertial response and thus inherently contribute very little to the system inertia. This implies that the displacement of synchronous generators to accommodate the renewable energy sources will result in low system inertia. The change in the system inertia may result in an increase or decrease in the number of dominant modes of the power system. The frequency range of the oscillation may increase from the traditional known range of 0.2 Hz to 3 Hz. It therefore becomes important for the operator of the power system to be able to have full visibility of the dynamic system behavior. The traditional Supervisory Control and Data Acquisition (SCADA) visualization tool of the power system becomes inadequate as it does not show the transient behavior of the power system due to its inherent low data resolution. PMU based visualisation tool is better equipped to monitory the dynamic instabilities of the power system.

Panelist 4:

Name: Rajiv Porwal

Organisation: Power System Operation Corporation Limited (POSOCO) – Chief General Manager, India

Title of presentation: Synchrophasor Applications in Indian Power System

Abstract: India started deploying Wide Area Monitoring System (WAMS) as a pilot since 2010 for improving Situational Awareness (SA) of the power system with a high resolution data availability at control centres. The number of phasor measurement units (PMUs) available in the system at present has increased to more than 1400. This Synchrophasor technology is being utilized by power system operators as an analytical tool for better system operation such as monitoring of frequency, Rate of change of frequency, Voltage, Power flows and Angle differences. The different applications at control centre are fault identification, islanding, stress on the transmission system, intra and inter area oscillation detection, voltage imbalances, model validation, linear state estimation. These synchrophasors have also been used in post-dispatch analysis of events. These aspects and some of the applications of synchrophasor displays and data as used in Indian power system operation would be discussed.