The use case approach, key for Smart Energy requirements collection

Smart Grid is a means to support a set of applications, and standards are there to enable applications to be deployed. This means that the standardization process should offer a formal path between the application as “requested” by Smart Grid and the standards themselves, i.e. a “top-down” process.

For many reasons (including historical, organisational, technology maturity), in many cases, this path has not been the one implemented, leading to inconsistencies between standards, gaps and overlaps, or was partly implemented but with weak leak with other domains of expertise.

The challenge of IEC is to progressively promote this approach to all concerned TCs, but also provide guidance, technical framework, processes and tools to support it, and reach the expected consistency. This is one of the main challenges of the IEC System Committee.

This leads to the formalization of functional requirements, in a way which is independent from the body in charge of defining a standard, and which will ensure consistency within the smart grid system, i.e.:

• a single repository, where such definitions of functional requirements are hosted in a way that collaboration is supported, while different groups from different domains can work separately;

• a single glossary harmonized with IEC’s terminology database(s);

• a single list of actors and roles for each domain;

• a single method.

A use case-driven approach is necessary for a top-down development of standards. From a use case perspective actors and deliverables are identified and requirements are derived. This is the base for future system approach in standardization.

Here is the list of available and coming standards.


Available standards

Layer/Type

Standard

Comments

General

IEC 60050 series

International Electrotechnical Vocabulary also available on www.electropedia.org

General

IEC 61360 series

Database standards – may be a good support for incremental approach of the Smart grid (example : Actors list or use cases management)

Function

IEC/PAS 62559

Template for specifying Energy systems–related use cases

General

IEC 62559-2

Use case methodology. Part 2: Definition of use case template, actor list and requirement list

Coming standards

Layer/Type

Standard

Comments

General

IEC 62559-1

Use case methodology – Part 1: Concept and processes in standardization

General

IEC 62559-3

Use case methodology – Part 3: Definition of use case template artefacts into an XML serialized format

General

IEC TS 62913-1

Generic Smart Grid Requirements – Part 1: Specific application of Method and Tools for defining Generic Smart Grid Requirements

Business/Function

IEC TS 62913-2-1

Generic Smart Grid Requirements – Part 2-1: Grid related Domains

Business/Function

IEC TS 62913-2-2

Generic Smart Grid Requirements – Part 2-2: Market related Domain

Business/Function

IEC TS 62913-2-3

Generic Smart Grid Requirements – Part 2-3: Resources connected to the Grid Domains

Business/Function

IEC TS 62913-2-4

Generic Smart Grid Requirements – Part 2-4: Electric Transportation Domain

System Capabilities list

System capabilities express the first level of functional assessment of Use cases supported by a given system. The list below sums-up the system capabilities for all the systems presented in the system break down of the Smart Energy domain

Cluster

System Capabilities

Access Control (Substation Remote Access Example)

Local access to devices residing in a substation, with higher level support (e.g. control centre) for authentication and authorization

Local access to devices residing in a substation, with substation local authentication and authorization

Remote access to devices residing in a substation, with higher level support (e.g. control centre) for authentication and authorization using a separate VPN

Remote access to devices residing in a substation, with higher level support (e.g. control centre) for authentication and authorization using a communication protocol inherent security means

Remote access to devices residing in a substation, with substation local authentication and authorization using a separate VPN

Remote access to devices residing in a substation, with substation local authentication and authorization using a communication protocol inherent security means

(AMI) Billing

Obtain scheduled meter reading

Set billing parameters

Add credit

Execute supply control

Billing

Obtain meter reading data

Support prepayment functionality

Manage tariff settings on the metering system

Consumer move-in/move-out

Supplier change

Blackout management

Blackout prevention through WAMS

Provision of black start facilities for grid restoration

Restore power after blackout

Shedding loads based on emergency signals

Under frequency shedding

(AMI) Collect events and status information

Manage supply quality

(AMI) Configure events, statuses and actions

Configure meter events and actions

Manage events

Retrieve AMI component information

Check device availability

Connect an active actor to the grid

Managing generation connection to the grid

Managing micro-grid transitions

Controlling the grid (locally/ remotely) manually or automatically

Enable multiple concurrent levels of control (local-remote)

Feeder load balancing

Switch/breaker control

Customer

Change of transport capacity responsible

Change of balance responsible party

Change of metered responsible

Change of supplier

End of metered data responsible

End of supply

Notify meter point characteristics

Query metering point characteristics

Request metering point characteristics

(AMI) Customer information provision

Provide information to consumer

Demand and production (generation) flexibility

Generation forecast

Load forecast

Load forecast of a bunch of prosumers in a DR program (from remote)

Managing energy consumption or generation of DERs via local DER energy management system bundled in a DR program

Managing energy consumption or generation of DERs and EVSE via local DER energy management system to increase local self-consumption

Participating in the electricity market

Receiving metrological or price information for further action by consumer or CEM

Registration/deregistration of customers in DR program

Registration/deregistration of DER in DR program

(AMI) Energy market events

Manage consumer moving in

Manage customer gained

Manage customer lost

Manage customer moving out

Exchange of metered data

Measure collected data

Measure for imbalance settlement

Measure for labelling

Measure for reconciliation

Measure, determine meter read

Measure, determine meter read for switch

Flexibility markets

Operate flexibility markets

Generation Maintenance

Commissioning and Maintenance strategy (CMMS) definition

Collection of additional maintenance counters for Boiler and Steam Turbine stress

Collection of switching cycles and operating hours (maintenance counters)

Condenser maintenance optimization

Condition based operational advisories

Field alarms collection for maintenance

Field data collection for corrective and reactive maintenance

Field data collection for predictive or condition based maintenance

Field data collection for preventive maintenance

Risk assessment

Generation Operation Scheduling

Ancillary services and reserve products control

Day-ahead fleet scheduling

Day-ahead hydro plant valley scheduling

Fuel and other resources allocation, cogeneration and other by-products production

Intra-day fleet scheduling

Plant scheduling

Generation Transverse

Emissions compliance assessment

Emissions reporting

Equipment actual availability monitoring

Performance monitoring

Permit to work management

Plant capability estimation

Production reporting

Grid reliability using market-based mechanisms

Manage (auction/resale/curtailment) transmission capacity rights on interconnectors

Consolidate and verify energy schedules

Operate (register/bidding/clearing/publishing) Ancillary Services Markets

Solve balancing issues through Balancing Market

Solve grid congestion issues through Balancing Market

Grid stability

Monitoring and reduce harmonic mitigation

Monitoring and reduce power oscillation damping

Monitoring and reduce voltage flicker

Stabilizing network by reducing sub-synchronous resonance (Sub synchronous damping)

Stabilizing network after fault condition (Post-fault handling)

(AMI) Installation and configuration

AMI component discovery and communication setup

Clock synchronization

Configure AMI device

Security (Configuration) Management

Maintaining grid assets

Archive maintenance information

Monitoring assets conditions

Optimize field crew operation

Supporting periodic maintenance (and planning)

Manage commercial relationship for electricity supply

Further from ESMIG

Further suggestions to market

Invoicing customers

Registration/deregistration of customers

Managing power quality

Frequency support

Voltage regulation

VAR regulation

Market Settlements

Perform measurement and validation (M and V)

Perform settlements

Monitor AMI event

Install, configure and maintain the metering system

Manage power quality data

Manage outage data

Manage the network using metering system data

Manage interference to metering system

Enable and disable the metering system

Display messages

Facilitate DER for network operation

Facilitate demand response actions

Interact with devices at the premises

Manage efficiency measures at the premises using metering system data

Demand side management

Monitoring the grid flows

Archive operation information

Capture, expose and analyse disturbance events

Monitoring electrical flows

Monitoring power quality for operation (locally)

Producing, exposing and logging time-stamped events

Supporting time-stamped alarms management at all levels

Operate DER(s)

Aggregate DER as commercial VPP

Aggregate DER as technical VPP

DER performance management

DER process management

DER process management with reduced power output

DER remote control (dispatch)

Registration/deregistration of DER in VPP

Store energy from the grid

Operate wholesale electricity market

Receive energy offers and bids

Clear day-ahead market

Clear intraday market

Clear real-time market

Publish market results

Protecting the grid assets

Perform networked protection logic (Intertripping, logic selectivity, etc.)

Perform networked security logic (Interlocking, local/remote)

Protect a single equipment (Incomer/feeder, Transformer, Generator)

Protect a zone outside of the substation boundary

Set/change protection parameters

Provide and collect contractual measurements

Collect metered data (for revenue purpose)

Cross border transmission systems

Measuring and exposing energy flows for revenue purpose (smart meter)

Measuring and exposing power quality parameters for revenue purpose (smart meter)

Transmission system/ distribution borders

Reconfiguring the network in case of fault

Supporting automatic FLISR

Supporting reclosing sequence

Supporting source switching

Secure adequacy of supply

Operate capacity markets

System and security management

User management

Role management

Rights/privileges management

Key management

Events management

Configure newly discovered device automatically to act within the system

Discover a new component in the system

Distributing and synchronizing clocks

Trading front office operation

Bid into energy markets

Compute optimized assets schedules to match commercial contracts

Send assets schedules to operation systems

Bid into ancillary services markets

Purchase transmission capacity rights

Nominate schedules to system operator

Send market schedules to operation systems

Publish market results

Perform M and V

Perform shadow settlements

Weather condition forecasting and observation

Wind forecasting

Solar forecasting

Temperature forecasting

Providing weather observations

Situational alerting

Connecting industry grid users

Facility and smart grid obtain current and past energy information

Facility provides energy consumption and supply plan to smart grid

Smart grid provides stable (long term) price schedule to facility

Smart grid provides dynamic (short term) pricing to facility

Facility informs smart grid about upcoming consumption and supply

Smart grid informs facility of blackout notice

Smart grid requests facility to alter consumption or supply

Facility and smart grid negotiate price schedule