Smart Transmission Grid: Vision and Framework

Presented by:Guided By:

ContentsIntroductionChallenges and need for future smart

transmission gridFramework and Characteristics of Smart

Transmission GridsSmart Control CentersSmart transmission NetworkSmart substationIntegration FrameworkConcluding remarksReferences

INTRODUCTIONThe development of human society and

economic needs was the catalyst that drove the revolution of transmission grids stage-by-stage with the aid of innovative technologies.

As the backbone used to deliver electricity from points of generation to the consumers, the transmission grid revolution needs to recognize and deal with more diversified challenges than ever before.

Challenges and need for future smart transmission grid Environmental challenges-coal

based ,natural disaster, space Market/consumer needs-power quality, full

fledged, communication with grid Infrastructure challenges-fast aging

devices, wide area monitoring, online assessment fast and accurate measurement

Innovative technologies-are not mature enough or not available, lack compatibility to accommodate spearhead technologies

Framework and Characteristics of Smart Transmission Grids Digitalization-unique platform for fast and

reliable sensing, measurement, communication, computation, control, protection, visualization, and maintenance of the entire transmission system.

Flexibility- Expandability, Adapatibility,multiple control

strategies to coordinate,compability to accommodate

Intelligence-intelligent technologies and human expertise will be incorporated

Resiliency-Self healing capability to reconfigure it self online computation and analysis.

Sustainability-sufficiency, efficiency and environment friendly

Customization-tailored for the demand of operators covenience

Enabling technologies

New materials and alternative clean energy resources

Advanced power electronics and devices-qualityCommunications-serve the basis for

computing,control and intelligenceAdvanced computing and control

methodologies-distributed copu will help in real time modelling and simulation.

Mature power market regulation and policiesIntelligent technologies-knowledge

discovery,self learning

SMART CONTROL CENTERS Monitoring/Visualization

phasor measurement units for voltage angles,GIS,interfacing

Analytical Capability

The present analysis is based on predefined generator and transmission models. This does not represent the real-time dynamic characteristics of the system. Therefore, the future online analysis in the control center shall perform dynamic model update and validation. The updated and validated data will be used for the online stability analysis

Controllability

Real time action, coordinate capability

Interactions with Electricity Market

Should able to include to alternate sources

SMART TRANSMISSION NETWORKS

High-Efficiency and High-Quality Transmission Networks-

long-distance transmission is accomplished by using controllable high-capacity ac and dc facilities, ., 6- or 12-phase transmission line configurations, allow for greater power transmission, Advanced conductors

Flexible Controllability, Improved Transmission Reliability and Asset Utilization Through the use of Advanced Power Electronics-

facts devices to relieve congestion,integration with the help of HVDC,Solid state circuit breakers

Self-Healing and Robust Electricity Transmission Monitoring system for transformer and circuit breaker

Advanced Transmission Facility Maintenance

live line maintenance, prevention programmers can save from catastrophic failures

Extreme Event Facility Hardening System

Identify potential extreme contingencies

Smart substation It should enable more reliable and efficient monitoring,

operation, control, protection, and maintenance of the equipment and apparatus installed in the substations. major characteristics –

Digitalization- compatible platform for fast and reliable sensing, measurement, communication, control, protection,

Autonomy- The operation of the smart substation does not depend upon the control centers and other substations

Coordination- find it easy to communicate and coordinate with other substations and control centers.

Self-healing- is able to reconfigure itself dynamically to recover from attacks, natural disasters, blackouts, or network component failures.

Main functions-

Smart Sensing and Measurement- all measurement signals will be time stamped with high accuracy by using a global positioning system (GPS) signal. The RTU function will be replaced by a PMU in the future.

Communication-LAN,IEC61850Autonomous Control and Adaptive ProtectionData Management and VisualizationMonitoring and AlarmingDiagnosis and PrognosisAdvanced Interfaces with Distributed Resources Real-Time Modeling

Layout of smart substation

INTEGRATION FRAMEWORK

The backbone of the integration is the distributed intelligence at the smart transmission networks and substations

which can assist with making decisions based on local information to reduce the work load of the control center.

Integration Framework

Concluding remarksThis presention has presented a unique vision of

the next-generation smart transmission grids. It aims to promote technology innovation to achieve an affordable, reliable, and sustainable delivery of electricity. With a common digitalized platform, the smart transmission grids will enable increased flexibility in control, operation, and expansion; allow for embedded intelligence, essentially foster the resilience and sustainability of the grids; and eventually benefit the customers with lower costs, improved services, and increased convenience.

REFERENCES

  Base paper Smart Transmission Grid: Vision and Framework Flanging Li, Senior Member,

IEEE, Wei Xiao, Member, IEEE, Hong bin Sun, Member, IEEE, Hui Wan, Member, IEEE, Jiamusi Wang, Member, IEEE, Yan Xia, Member, IEEE, Zhao Xu, Member, IEEE, and Pei Zhang, Senior Member, IEEE

  2. G. Lu, J. Liu, and C. Zhang, “The technology development of substation digitization,” (in

Chinese) Power Syst. Technol., vol. 30, Suppl., pp. 499–504, Oct. 2006.  3. J. R. Ron cero, “Integration is key to Smart Grid management,” in Proc. IET-CIRED Seminar

Smart Grids for Disturb., Jun. 23–24, 2008, pp.1–4.  4. R. Cosse, Jr., J. E. Bowen, H. T. Combs, D. G. Dunn, M. A. Hildreth, and A. Pilcher, “Smart

industrial substations,” IEEE Ind. Appl. Mag., vol. 11, no. 2, pp. 12–20, Mar.–Apr. 2005.  5. The transmission smart grid imperative Developed for the U.S. Department of Energy

Office of Electricity Delivery and Energy Reliability by the National Energy Technology Laboratory September 2009

  6. F. F. Wu, K. Moslehi, and A. Bose, “Power system control centers: Past, present, and future,”

Proc. IEEE, vol. 93, no. 11, pp. 1890–1908, Nov. 2005.