- AG C4.1: Strategic Directions
- AG C4.2: Institutional Liaison
- AG C4.3: Tutorials and Conferences
- JWG A1/C4.52 Wind generators and frequency-active power control of power systems
- JWG A2/C4.309 Electrical Transient Interaction between Transformers and the Power System
- JWG A2/C4.52 High-frequency transformer and reactor models for network studies
- JWG A3/B5/C4.37 System conditions for and probability of Out-of-Phase
- JWG B4/B1/C4.73 Surge and extended overvoltage testing of HVDC Cable Systems
- JWG C1/C4.36 Review of Large City & Metropolitan Area power system development trends taking into account new generation, grid and information technologies
- JWG C2/C4.37 Recommendations for Systematic Framework Design of Power System Stability Control
- JWG C4.24/CIRED Power Quality and EMC Issues Associated with Future Electricity Networks
- JWG C4.31/CIRED EMC between Communication Circuits and Power Systems
- JWG C4.40/CIRED Revisions to IEC Technical Reports 61000-3-6, 61000-3-7, 61000-3-13, and 61000-3-14
- JWG C4.42/CIRED Continuous assessment of low-order harmonic emissions from customer installations
- JWG C4/B4.38 Network Modelling for Harmonic Studies
- JWG C4/B4/C1.604 Influence of Embedded HVDC Transmission on System Security and AC Network Performance
- JWG C4/B5.41 Challenges with series compensation application in power systems when overcompensating lines
- JWG C4/C6.29 Power Quality Aspects of Solar Power
- JWG C4/C6.35/CIRED Modelling and dynamic performance of inverter based generation in power system transmission and distribution studies
- WG C4.111 Review of LV and MV Compatibility Levels for Voltage Fluctuation
- WG C4.112 Power Quality Monitoring in Flexible Power Networks
- WG C4.206 Protection of the High Voltage Power Network Control Electronics Against Intentional Electromagnetic Interference (IEMI)
- WG C4.207 EMC with communication circuits, low voltage systems and metallic structures
- WG C4.208 EMC in HV Substations and Generating Stations
- WG C4.23 Guide to Procedures for Estimating the Lightning Performance of Transmission Lines
- WG C4.25 Issues related to ELF Electromagnetic Field exposure and transient contact currents
- WG C4.26 Evaluation of Lightning Shielding Analysis Methods for EHV and UHV DC and AC Transmission-lines
- WG C4.27 Benchmarking of Power Quality Performance in Transmission Systems
- WG C4.28 Extrapolation of measured values of power frequency magnetic fields in the vicinity of power links
- WG C4.30 EMC in Wind Generation Systems
- WG C4.303 Pollution and Environmental Influence on Electrical Performance
- WG C4.305 Practices in Insulation Coordination of Modern Electric Power Systems Aimed at the Reduction of the Insulation Level
- WG C4.306 Insulation Coordination of UHV AC systems
- WG C4.307 Resonance and Ferroresonance in Power Networks and Transformer Energization Studies
- WG C4.32 Understanding of the Geomagnetic Storm Environment for High Voltage Power Grids
- WG C4.33 Impact of Soil-Parameter Frequency Dependence on the Response of Grounding Electrodes and on the Lightning Performance of Electrical Systems
- WG C4.34 Application of Phasor Measurement Units for monitoring power system
- WG C4.36 Winter Lightning – Parameters and Engineering Consequences for Wind Turbines
- WG C4.37 Electromagnetic Computation Methods for Lightning Surge Studies with Emphasis on the FDTD Method
- WG C4.39 Effectiveness of line surge arresters for lightning protection of overhead transmission lines
- WG C4.407 Lightning Parameters for Engineering Applications
- WG C4.408 Lightning Protection of Low-Voltage Networks
- WG C4.409 Lightning Protection of Wind Turbine Blades
- WG C4.410 Lightning Striking Characteristics to Very High Structures
- WG C4.43 Lightning problems and lightning risk management for nuclear power plants
- WG C4.44 EMC for Large Photovoltaic Systems
- WG C4.45 Measuring techniques and characteristics of fast and very fast transient overvoltages in substations and converter stations
- WG C4.501 Numerical Electromagnetic Analysis and Its Application to Surge Phenomena
- WG C4.502 Power system technical performance issues related to the application of long HVAC cables
- WG C4.503 Numerical techniques for the computation of power systems, from steady-state to switching transients
- WG C4.603 Analytical Techniques and Tools for Power Balancing Assessments
- WG C4.605 Modelling and aggregation of loads in flexible power networks
WG C4.34 Application of Phasor Measurement Units for monitoring power system
The state of the art in the application of Phasor Measurement Units (PMUs) for the monitoring power system dynamics and the preliminary investigations into applying widearea control and protection of power systems was reported in 2007 in a Technical Brochure on Wide Area Monitoring and Control For Transmission Capability Enhancement. This work was the result of one of the tasks of CIGRE WG C4.601 on Power System Security Assessment. The Technical Brochure concluded that the expectations for Wide Area Monitoring and Control Systems are high and a growing community of researchers and utility experts are working on practical applications and installations of this technology around the globe. It also stated that the technology is promising, but it was still a long way away from seeing applications. It was also reported that an increasing number of transmission system operators are running application studies to evaluate the benefits of this technology or even execute implementation projects at the time of writing the Technical Brochure. The purpose of this proposed Working Group is to survey and report the recent developments in this fast advancing technology. The past two to three years saw a large number of Phasor Measurement Units installed on North American, European and other power systems across the world. Preliminary deployment of PMUs are also appearing in distribution networks with large penetration of distributed generation as PMUs are expected to enable both real-time observability and control of these networks. Major relay manufacturers are facilitating the measurements from PMUs to be received and utilized within their devices. The development of common communication protocols has also advanced in the recent years. There is a major move towards adopting the IEC 61850 as the common protocol. In addition, parallel developments have also been taking place on new tools to utilize the data obtained from PMUs to monitor power systems. Such applications will enhance the security of the power system. At research and development level, efforts of closing the loop by using the PMU measurements as input signals to controllers and protective relays have also been reported recently. Another branch of research being reported is to use the PMU measurements as supplemental signals to State Estimation in Energy Management Systems.
The main scope of this WG will be the assessment of the maturity of technology of Page 2 / 3 synchrophasor measurements and its applications for enhancing the power system technical performance. The main activities will include:
- Overview of the synchrophasor technology including its capability and robustness against latency and missing data.
- Overview of the common communication protocol and data security.
- Differentiation of PMU accuracy requirements for transmission and distribution networks applications.
- Collection and description of applications relevant to system technical performance enhancement for both transmission and distribution networks.
- Identify and describe the need for new applications and analysis tools based on existing knowledge.
- Recommend areas for further research and development to gain new knowledge and to identify new and valuable applications of PMU data.
In the course of this work, consideration will be given to and a review made of related recent publications such as the IEEE Standard C37.118.1-2011 "IEEE Standard for Synchrophasor Measurements for Power Systems".
Report to be published in Electra or technical brochure with summary in Electra
Convener : U. D. Annakkage (Canada)