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McGill University 1 Chapter 5: Smart Grid Communications Networks: WirelessTechnologies, Protocols, Issues and Standards Quang-Dung Ho and Tho Le-Ngoc.

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Presentation on theme: "McGill University 1 Chapter 5: Smart Grid Communications Networks: WirelessTechnologies, Protocols, Issues and Standards Quang-Dung Ho and Tho Le-Ngoc."— Presentation transcript:

1 McGill University 1 Chapter 5: Smart Grid Communications Networks: WirelessTechnologies, Protocols, Issues and Standards Quang-Dung Ho and Tho Le-Ngoc ECE Dept., McGill University, Montreal, Canada HANDBOOK ON GREEN INFORMATION AND COMMUNICATION SYSTEMS

2 McGill University 2 Contents Introduction to Smart Grid Smart Grid Communications Network (SGCN) Communications Traffic and Required Quality of Services (QoSs) Wireless Communications Technologies for SGCN Neighbor Area Network (NAN) and Open Research Issues Smart Grid Standards Summary References

3 McGill University 3 a new digital meter on your breaker panel? a wireless network that reads those meters remotely or the data management system that processes the information? some solar panels on the roof? a load-controller on the heating, ventilation, and air conditioning system? Smart Grid is the inclusion of all of these things Smart Grid

4 McGill University 4 Smart Grid an automated, widely distributed energy delivery network characterized by a two-way flow of electricity and information, capable of monitoring and responding to changes in everything from power plants to customer preferences to individual appliances [1] the electricity delivery system (from point of generation to point of consumption) integrated with communications and information technology for enhanced grid operations, customer services, and environmental benefits (Funding for Smart GriFunding Grid Activities, US Department of Energy, 2009, link:

5 McGill University 5 Smart Grid Can Identify and resolve faults on electricity grid Automatically self-heal the grid Monitor power quality and manage voltage Identify devices or subsystems that require maintenance Help consumers optimize their individual electricity consumption (minimize their bills) Enable the use of smart appliances that can be programmed to run on off-peak power

6 McGill University 6 SG Comm. Network (SGCN) The key to achieving these potential benefits of SG is to successful build up Smart Grid Communications Network (SGCN) that can support all identified SG functionalities –Advanced Metering Infrastructure(AMI), –Demand Response (DR), –Electric Vehicles (EVs), –Wide-Area Situational Awareness (WASA), –distributed energy resources and storage, –distribution grid management, etc.

7 McGill University 7 SG Comm. Network (SGCN) Neighbor Area Network (NAN) Home Area Network (HAN) Power Generation Power Transmission Grid Power Distribution Grid Power Consumption Smart Meter Substation Customer Microgrid (a) Power System Layer (b) Communications Layer Wireless Backhaul Base Station Control Center Wired Backhaul Network Wide Area Network (WAN) Smart Meter Data Aggregation Point (DAP) Electric Vehicle Solar EnegyWind Enegy Non-renewable Enegy Concentrator Smart Home Device The overall layered architecture of SG

8 McGill University 8 Traffic and Required QoSs Traffic TypesDescriptionBandwidthLatency AMI Networks Meter Reads Meters report energy consumption (Ex: the 15-min interval reads are usually transferred every 4 hours) Up to 10kbps2 to 10sec Demand Response (DR) Utilities to communicate with customer devices to allow customers to reduce or shift their power use during peak demand periods Low500ms ~ min Connects and Disconnects Connects/disconnect customers to/from the gridLowA few 100ms, a few minutes Substation Networks Synchrophasor The major primary measurement technologies deployed for Wide-Area Situational Awareness (WASA) A few 100kbps20ms to 200ms Substation SCADA 4-sec interval polling by the master to all the intelligent electronic devices inside the substation 10 to 30kbps2 ~ 4sec Inter-substation Communications Emerging applications such as DER might warrant GOOSE communications outside substation --12ms ~ 20ms Surveillance Video site surveillanceA few MbpsA few sec Distribution Network Fault Location, Isolation and Restoration (FLIR) To control protection/restoration circuits10 to 30kbpsA few 100ms Optimization volt/var optimization and power quality optimization on distribution networks2 ~ 5Mbps25 ~ 100ms Workforce Access Provides expert video, voice access to field workers250kbps150ms Asset Management For predictively and pro-actively gathering and analyzing non-operational data for potential asset failures -- Microgid Protection To response to faults, isolate them and ensure loads are not affected--100ms ~ 10sec Operation Optimization Monitors and controls the operations of the whole MG in order to optimize the power exchanged between the MG and the main grid --100ms ~ min

9 McGill University 9 Wireless Comm. Technologies TechnologyAdvantageDisadvantageApplication Zigbee (IEEE , ZigBee Alliance) Low-cost, low power, wireless mesh standard for wireless home area networks (WHANs) or wireless personal area networks (WPANs) Very low cost - inexpensive consumer devices; Low power consumption - years of battery life; Self- organizing, secure, and reliable mesh network; Network can support a large number of users; Smart energy profile for HANs is available Very short range; Does not penetrate structures well; Low data rates; Developers must join ZigBee Alliance HANs for energy management and monitoring; Unlikely to be used in NANs Wi-Fi (IEEE b/g/n) Indoor wireless local area networks (WLANs), wireless mesh networks Low-cost chip sets - inexpensive consumer devices; Widespread use and expertise; Low- cost application development; Stable and mature standards Does not penetrate cement buildings or basements; Small coverage and short distances limit wide spread use; Security issues with multiple networks operating in same locations Could be used for HANs, MGANs, and NANs 3G Cellular (UMTS, CDMA2000, EV-DO, EDGE) Wide-area wireless networks for voice, video, and data services in a mobile environment Expensive infrastructure already widely deployed, stable and mature; Well standardized; Equipment prices keep dropping; Readily available expertise in deployments; Cellular chipset very inexpensive; Large selection of vendors and service providers Utility must rent the infrastructure from a cellular carrier for a monthly access fee; Utility does not own infrastructure; Technology is in the transition phase to LTE deployment; Public cellular networks not sufficiently stable/secure for mission critical/utility applications; Not well- suited for large data/high bandwidth applications AMI Backhaul, Field Area Network (FAN) LTE Enhancements to 3G Universal Mobile Telecommunications System (UMTS) mobile networking, providing for enhanced multimedia services Low latency, high capacity; Fully integrated with 3GGP, compatible with earlier 3GPP releases; Full mobility for enhanced multimedia services; Carrier preferred protocol; Low power consumption Utility must rent the infrastructure from a cellular carrier for a monthly access fee; Utility does not own infrastructure; Not readily available in many markets/still in testing phases in others; Equipment cost high; Vendor differentiation still unclear; Lack of expertise in designing LTE networks; Utilities access to spectrum AMI Backhaul, SCADA Backhaul, Demand Response, FAN, Video Surveillance WiMAX (IEEE ) Wireless metropolitan area network (MAN) providing high- speed fixed/mobile Internet access Efficient backhaul of data – aggregating 100s access points; QoS supports service assurance; Battery-backup improves reliability and security; Simple, scalable network rollout and customer- premises equipment (CPE) attachment; Faster speeds than 3G cellular; Large variety of CPE and gateway/ base station designs Limited access to spectrum licenses in the US; Trade off between higher bit rates over longer distances; Asymmetrical up and down link speeds; User shared bandwidth; Competing against future 4G cellular AMI Backhaul, SCADA Backhaul, Demand Response, FAN, Video Surveillance

10 McGill University 10 Neighbor Area Network (NAN) Gathers a huge volume of various types of data and distributes important control signals from and to millions of devices installed at customer premises The most critical segment that connects utilities and customers in order to enable primarily important SG applications

11 McGill University 11 Characteristics of NAN To support a huge number of devices that distribute over large geographical areas Must be scalable to network size and self- configurable Heterogeneous and location-aware Link condition and thus network connectivity are time-varying due to multipath fading, surrounding environment, harsh weather, electricity power outage, etc.

12 McGill University 12 Characteristics of NAN Deployed outdoor, thus must be robust to node and link failures Carries different types of traffic that require a wide range of QoSs Needs QoS awareness and provisioning Mainly supports Multi-Point-to-Point (MP2P) and Point-to-Multiple-Point (P2MP) traffic Very vulnerable to privacy and security

13 McGill University 13 Wireless Routing Overview Flooding-based Location-based Self-organizing Cluster-based Simple Message implosion, resource-blind, mainly for P2P Simple, exploits location infor. Loops, distance not represents link quality Adapts well to link quality, supports MP2P and P2MP, supports QoSs Complicated, needs more signalings Resource-efficient, supports security Complicated, less dynamic to link conditions Routing protocols for wireless networks

14 McGill University 14 Candidate Routing Protocols for NAN Greedy Geographic routing (GEO) [40] Routing Protocol for Low Power and Lossy Networks (RPL) [41 46] IEEE s Hybrid Wireless Mesh Protocol (HWMP) [47 49]

15 McGill University 15 Open Issues in NAN Downlink Communications QoS Differentiation and Provisioning Network Self-healing Multicasting Cluster-based Routing Optimal Network Design

16 McGill University 16 Smart Grid Standards Inter-operability: the ability of two or more systems or components to exchange information and to use the information that has been exchanged The overall SG system is lacking widely accepted standards

17 McGill University 17 Smart Grid Standards Standards Development Organizations (SDOs): –National Institute of Standards and Technology (NIST), –American National Standards Institute (ANSI), –International Electrotechnical Commission (IEC), –Institute of Electrical and Electronics Engineers (IEEE), –International Organization for Standardization (ISO), International Telecommunication Union (ITU), –etc. Alliances: –ZigBee Alliance, Wi-Fi Alliance, HomePlug Powerline Alliance, Z-Wave Alliance, etc.

18 McGill University 18 NIST Activities primary responsibility to coordinate development of a framework that includes protocols and model standards for information management to achieve inter-operability of smart grid devices and systems... (Energy Independence and Security Act of 2007, Title XIII, Section 1305) Specific activities: –(i) identifying existing applicable standards –(ii) addressing and solving gaps where a standard extension or new standard is needed and –(iii) identifying overlaps where multiple standards address some common information

19 McGill University 19 NIST Activities NIST Framework and Roadmap for Smart Grid Inter-operability Standards, Release 1.0 [52] –25 relevant standards (and additional 50 standards for further review) NIST Framework and Roadmap for Smart Grid Inter-operability Standards, Release 2.0 [53] –34 reviewed standards (and additional 62 standards for further review)

20 McGill University 20 NIST Activities Priority Action Plans (PAPs), each addresses one of the following situations: –a gap exists, where a standard extension or new standard is needed; –an overlap exists, where two complementary standards address some information that is in common but different for the same scope of application

21 McGill University 21 NIST Activities PAPs identified by NIST

22 McGill University 22 Representative SG Standards C12.18 C12.19 C12.22 M-Bus Zigbee Wi-Fi SAE J2293 SAE J2836 SAE J2847 IEEE P2030 BACnet OpenADR DRBizNet IEC DNP3 Distributed Energy Resources IEC IEEE 1547 Commercial user Residential user PHEV Wind farm IEC Smart meter Wi-Fi SUN 3G/4G Cellular Substation Wide Area Network Home Area Network Neighbor Area Network 3G/4G Cellular Wi-Fi SONET WiMAX IEC DNP3 CIM Control center

23 McGill University 23 Summary This chapter gives an insight view of the Smart Grid Communications Network (SGCN) by presenting –its layered architecture, –typical types of traffic that it may carry and associated quality of service requirements, –as well as candidate wireless communications technologies that can be employed for its implementation Networking issues that the Neighbor Area Network (NAN) segment of SGCN needs to tackle are highlighted by –exploring characteristics and requirements of this network segment –identifying important gaps that existing wireless routing protocols need to cover for their applicability into NAN This chapter also reviews a number of standards for smart grid inter-operability

24 McGill University 24 References

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