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Technical scope

TECHNICAL COMMITTEE CHAIR: Pierre Mallet, France

 

SESSION 1: NETWORK COMPONENTS

Chair: Christophe Boisseau (France)
Rapporteurs: Arnaud Allais (France), François Gentils (France)

Session 1 deals with all aspects related to the components used in the electricity distribution networks: cables, overhead lines, primary and secondary substations, transformers, switchgear plus their control, protection and monitoring systems, new active power electronics devices.

It covers topics related to the life cycle optimisation of assets from design through installation, operation and maintenance, monitoring and diagnosis, to end of life management, including new techniques such as Big Data and Artificial Intelligence. The session also covers environmental aspects including eco-design and life cycle analysis, standardisation, ergonomics and safety.

It aims to provide an overview of the state-of-the-art in component design and proposals for future components, including the ones needed for smartgrids, e-mobility, smart cities and microgrids. This session is an opportunity for Distribution System Operators (DSOs) and manufacturers to share their objectives.

COMPONENTS FOR SMART DISTRIBUTION GRIDS

  • Components incorporating local data acquisition, intelligent information generation and communication capability
  • Smart secondary substations
  • Components and sensors for voltage control and power flow management
  • Communication components and infrastructures
  • Power electronics-based grid components
  • Components for DC networks and AC/DC hybrid networks
  • Components for the integration of distributed generation
  • Storage devices
  • Components for e-mobility

COMPONENTS RELIABILITY, DIAGNOSIS AND MAINTENANCE STRATEGY

  • Condition assessment, ageing models, lifetime assessment
  • Diagnostics of network components
  • Online monitoring of distribution system assets, including underground cables
  • Life extension, upgradeability, reparability
  • Use of new solutions like digital tools, big data, artificial intelligence, drones for diagnostics and maintenance
  • Reliability and lifetime assessment of smart components and their integration in existing systems
  • Impact of climate change on network components

COMPONENTS FOR LARGE CITIES DISTRIBUTION NETWORKS

  • Compact substations
  • Modular components for fast installation and extensibility
  • High reliability solutions
  • Short circuit current mitigation
  • Components with increased power transfer capabilities
  • Components for large scale underground cabling

COMPONENTS FOR RURAL AREAS

  • Components for more resilient networks in case of high impact-low probability events
  • Innovative solutions for maintenance and life extension of overhead lines
  • Components and solutions for the disconnection and reconnection of microgrids

TOWARDS “GREEN COMPONENTS”

  • Eco-design
  • Life-cycle analysis
  • Use of bio-sourced and recycled materials
  • Reduction of losses
  • Management of hazardous substances
  • Limitation of visual and noise impact

INNOVATION IN DESIGN OF COMPONENTS

  • Modelling
  • Testing
  • New materials
  • Ergonomics and usability
    ● Evolution of standards
  • Functional specifications
  • Safety aspects

SESSION 2: POWER QUALITY AND ELECTROMAGNETIC COMPATIBILITY

Chair: Britta Heimbach (Switzerland)

Rapporteurs: Jan Desmet (Belgium), Jan Meyer (Germany), Herwig Renner (Austria)

Session 2 deals with all phenomena related to power quality (PQ). This includes flicker, unbalance and distortion in the frequency range up to 500 kHz.

The session covers all aspects of electromagnetic compatibility (EMC) including emission, immunity and its coordination and standardisation. Conducted and radiated electromagnetic interferences as well as electric and magnetic fields (EMF) issues are also addressed. Specific focus is put on the PQ characteristic of modern power electronic devices and PQ challenges related to the operation of distribution grids with very high share of power electronics.

Furthermore, new measurement techniques, analysis of big PQ data and the management of PQ at the interface between Distribution System Operators (DSOs) and Transmission System Operators (TSOs) are important topics for Session 2. Beside application examples and case studies, new modelling approaches and system simulation studies are covered.

POWER QUALITY

  • Issues related to modern power electronic equipment, like storage systems and distributed energy resources, electric vehicle charging, lighting devices, etc.
  • Issues related to future grids with very high share (up to 100%) of power electronics, including smart transformers
  • Challenges related to DC grids and microgrids, including islanded operation
  • PQ requirements for advanced distribution automation schemes
  • Impact of power electronics on resonances and frequency-dependent network impedance in the frequency range up to 500 kHz
  • Calculation, estimation and assessment of emission limits
  • Novel modelling approaches and simulation studies on PQ
  • Strategies to include PQ management in network planning and operation
  • Mitigation techniques for PQ phenomena
  • Needs for the revision of PQ standards and EMC concepts driven by energy transition and climate change
  • Aspects of PQ regulation and benchmarking

CONTINUITY OF SUPPLY

  • Outages, interruptions and dips (statistics, indices, etc.)
  • Voltage dip immunity and ride through capability of grid-interactive inverters and converters
  • Ride through solutions using new concepts (e.g. synthetic inertia)
  • Voltage and frequency stability in islanded microgrids

PQ MONITORING AND ANALYTICS

  • New measurement techniques and indices, covering the frequency range DC to 500 kHz
  • Integration of PQ functionalities into secondary equipment, including smart meter, protection devices, etc.
  • Efficient design and implementation of PQ monitoring campaigns
  • Strategies for handling large amounts of PQ data
  • Data mining and data analytics for PQ related data, including the application of AI techniques
  • Novel techniques for PQ data visualisation
  • Standards for PQ data format and data interchange

ELECTRIC AND MAGNETIC FIELDS, IMMUNITY AND SAFETY ISSUES

  • Low frequency electromagnetic interference, impact on metallic installations (pipelines, communication and powerlines)
  • Immunity issues related to smart meters, power line communication, ripple control systems and smart electronic devices
  • Impact of PQ on life time of equipment
  • Standardisation aspects of immunity
  • Novel developments in EMF including simulation, monitoring and standardization
  • Mitigation techniques (shielding, active compensation)
  • Lightning and switching overvoltages and related protection
  • Earthing systems, step and touch voltages, neutral grounding practices, risk evaluation
  • Safety issues in microgrids including islanded operation

PQ ISSUES AT THE INTERFACE BETWEEN DISTRIBUTION AND TRANSMISSION GRIDS

  • PQ management at the interface between DSO and TSO, including coordination of planning levels and emission limits
  • Interactions related to large windfarms, PV farms, HVDC, FACTS etc.
  • Resonances related to long AC cables and increased cabling
  • Specific modelling and simulation issues, e.g. grid equivalents for harmonic studies

SESSION 3: OPERATION, CONTROL AND PROTECTION

Chair: Markus Zdrallek (Germany)

Rapporteurs: Andreas Abart (Austria), Carsten Böse (Germany), Ignaz Hübl (Austria)

Session 3 traditionally deals with the operation of distribution networks, including control technology and system protection, which is a more and more challenging topic in the emerging environment of digitalisation, smart grids, distributed generation and e-mobility.

The relevant technical and economic targets of distribution grid operators, the expectations and requirements of stakeholders, as well as solution strategies of scientists and manufacturers’ new products will be presented and discussed in Session 3.

Both recent practical experiences and the results from current research as the basis of future developments are very welcome.

OPERATION

  • Workforce management tools and techniques to improve operation efficiency
  • Maintenance strategies and condition assessment
  • Data demand, data management and documentation
  • Organisation strategies and schemes for grid operators
  • Blackout, restoration strategies and crisis management
  • Impact of decentralised generation and virtual power plants on grid operation
  • Operation of industry grids
  • New applications in grid operation (Artificial Intelligence, augmented reality, drones, etc.)

CONTROL AND COMMUNICATION

  • Concepts for SCADA systems in a developing environment
  • Centralised versus decentralised control strategies
  • TSO/DSO-Interface, providing system services and flexibility on distribution level
  • Automation on distribution level and self-healing grids
  • Voltage control in MV- and LV-grids
  • IT-Security and resilience aspects of information access and information exchange
  • Convergence of power grids and communication grids
  • Communication standards techniques and protocols for smart grids and smart metering
  • Experience with multi-vendor solutions and interoperability
  • Practical experience with grid islanding - detection, control and protection
  • Management strategies for flexible loads (E-vehicles, heat pumps)
  • 5G- and IoT-Applications

PROTECTION

  • New protection schemes and functions for up-to-date grid structures
  • Protection simulation models, tools and new functions
  • Refurbishment strategies for protection systems
  • Impact of distributed generation on traditional protection systems
  • Protection management considering remote access and IT security
  • Reliability aspects of IEC 61850 based protection
  • Protection concepts in grids with low short circuit current
  • Fault location, analyses and records
  • Testing of protection relays, functions and systems

SESSION 4: DISTRIBUTED ENERGY RESOURCES AND EFFICIENT UTILISATION OF ELECTRICITY

Chair: Simon Terry (UK)

Rapporteurs: Helfried Brunner (Austria) Ricardo Prata (Portugal) Goran Strbac (UK)

Session 4 deals with the challenges of adapting distribution networks to facilitate the efficient integration of low carbon, renewable and Distributed Energy Resources (DER), from the integration perspective.

These include Distributed Generation (DG), energy storage, new loads (e.g. electric heating and Electric Vehicles (EVs)), active demand and aggregation of DER (e.g. Virtual Power Plants). DER integration challenges are likely to feature across all CIRED sessions so Session 4 specifically focuses on emerging technologies and solutions, results from research, development or demonstration programmes with results from network and system integration trials being particularly valued.

Session 4 papers will highlight the integration of DER within distribution networks through technical, commercial and regulatory solutions. Papers may describe developments in network management, demand side response, energy storage integration, efficient utilisation of electricity, network monitoring, telecommunications and data analytics and the role of DER in wider DSO business operations.

Also within the scope of Session 4 is whole energy system optimisation (including integration across other infrastructure systems and energy vectors), efficient management of network losses and the results from the larger smart grid demonstration projects.

NEW DER TECHNOLOGIES AND CONCEPTS

  • New DER assets and technologies including energy storage, demand side management and control solutions
  • Innovative telecommunications, data and control solutions for DER (e.g. IoT, web of cells)
  • Development of control algorithms and philosophies
  • Innovative DER asset monitoring technology and network state estimation approaches
  • DC network trials
  • Technical reliability and performance of Demand Response
  • DER data protocols and profiles for TSO/DSO coordination
  • Network islanding and resynchronisation capabilities

INTEGRATING AND MANAGING DER IN DISTRIBUTION NETWORKS

  • Management of power flow, voltage, fault level and stability
  • Larger scale DER integration data analytics and intelligence for distribution network management
  • DSO challenges and benefits
  • Flexibility services: identification of requirement, procurement and use
  • Interoperability and development of standards
  • Larger scale DER integration impact on network assets
  • Managing high volumes of DER including clustering of low carbon technologies
  • Flexibility commercial arrangements for DER and active customers
  • Integration and control of energy storage and effect on demand profiles
    ● Network codes and requirements associated with the integration of storage technologies in distribution networks
  • Challenges associated with the integration of new DER assets and technologies, including energy storage, demand side management and control solutions in distribution networks (including the challenges associated with LV networks)

DER ROLES IN NETWORK AND SYSTEM OPERATION

  • Coordinating and managing DER and active customer activities across TSO-DSO interface
  • Technical findings from trials relating to stability,protection and system reliability
  • Benefits of energy storage and related control approaches
  • Active control of DER for whole system optimisation, efficiency and security
  • Resilience of smart grid solutions when deployed at scale (including consideration of IT/telecoms requirements and common mode failures) and consideration of the impact on network planning standards
  • Managing new energy profiles and harnessing flexibility of different DER and customer types
  • Optimisation of DER across energy systems including transport, gas and heat
  • The role of distribution networks in delivering low carbon, sustainable energy supplies
  • Reducing network losses
  • The role of energy efficiency
  • Contribution of DG to network and system security

SESSION 5: PLANNING OF POWER DISTRIBUTION SYSTEMS

Chair: Fabrizio Pilo (Italy)

Rapporteurs: Riccardo Lama (Italy) Giovanni Valtorta (Italy)

Session 5 deals with all aspects related to the short and long term development of high, medium and low voltage distribution networks, with reference to the changing requirements for electricity distribution including, but not limited to, smart grids and active distribution networks, electric vehicles, storage, active demand and distributed energy resources integration, present and future customer quality of supply requirements, and optimum asset utilisation techniques and strategies.

There is increasing interest in strategies designed to meet the rapidly changing level of demand in both rural and urban areas, the extension of electrification in rural areas requiring a high quality of supply, and development strategies intended to increase resiliency against low probability high risk extreme events.

DEMAND AND GENERATION FORECAST

  • Artificial intelligence for load and generation forecast
  • Evolution of the demand characteristics (e.g. load profiling and segmentation)
  • Methodologies for demand forecast in an assigned area
  • Electric vehicle impact on the electrical demand
  • Ways to regulate the impact of electrical vehicles in demand
  • Vehicle-to-grid strategies
  • Renewable energy sources generation forecast

PERFORMANCE REQUIREMENTS, RESULTS, AND BENCHMARKING

  • Economical versus technical performance
  • System reliability and degree of adequacy
  • Methods for performance assessment
  • Results of performance evaluation and benchmarking R Evaluation of technical and non-technical losses
  • Satisfaction of customers and other stakeholders
  • Predictive assessment of power quality
  • Reliability assessment in smart grids
  • Increasing resiliency against low probability high risks extreme events
  • Microgrids and local energy communities to provide security of supply beyond the parameters associated with the DSO
  • New service providers (e.g. aggregators, consumers/producers, smart districts, smart buildings, etc.) assessment and benchmark

NETWORK SCHEMES AND DESIGN CRITERIA

  • Advanced network schemes for the best exploitation of distributed generation, energy storage and electric vehicles
  • Design of active networks and smart grids
  • Distribution systems for offshore wind farms
  • Low-losses design
  • Dependence on local environment
  • Co-existence and synergy with other infrastructures
    ● Distribution network design criteria for increasing resiliency
  • Distribution network schemes for developing countries
  • Assessment of the impact on network architecture and system development of services offered by microgrids and local energy communities (e.g., increasing of hosting capacity, resiliency, flexibility, investment deferment)
  • Schemes for the connection of electric vehicles in car parks, public or private buildings, and regulatory/standardisation framework
  • DC distribution

NETWORK PLANNING

  • Planning techniques with flexibility and system services from DERs
  • Integrated planning of multi-energy/multi-services (e.g. electricity, heat, cold, and gas, transportation, water, waste, etc.)
  • Integrated TSO/DSO planning with the flexibility and system services from DERs
  • Improving efficiency in distribution networks
  • Optimal integration of distributed energy resources
  • Storage and reactive power compensation systems planning
  • Planning criteria for electrification in low load density areas
  • Integration of EV fast charging installations in the network
  • Models and tools for including microgrids and local energy communities in development studies
  • Impact of Peer-to-peer transactions in planning

INVESTMENT STRATEGIES

  • Cost benefit analysis and decision making for smart grid development plans
  • Least cost investment plans
  • Financial planning and cash flow for investment
  • Network aging
  • Risk analysis and asset management implications
  • Non-network solutions for ancillary services
  • Obsolescence: shorter life-cycles due to automation and ICT technologies

Session 6: DSO CUSTOMERS, REGULATION AND BUSINESS MODELS

Chair: Peter Söderström (Sweden)

Rapporteurs: Peter Kjaer Hansen (Denmark) Dag Eirik Nordgård (Norway)

Session 6 focuses on a future electrical system with new business models, active customers, flexibility, risk management and digitalisation as key parts of the energy transition.

Future regulation needs to foster and enable R&D and investments in new marketplaces and network services, when microgrids and energy communities open the door for e.g. the mass-roll-out of e-mobility, local energy optimisation and local markets. Security and privacy by design must have high priority in the light of ongoing digitalisation, where security of supply, customer data, new data platforms and IoTs are being challenged by the cyber threat.

At the same time the asset/risk management and business optimisation is still key for the DSO. Ageing networks need to be replaced in the near future. But what impacts, strategic choices, options and limitations are crucial for the DSO to understand and handle when the future is changing?

REGULATION ENABLING FLEXIBILITY AND NEW BUSINESS MODELS

  • Sufficient regulation (roles/business model/income) for the DSO to support the energy transition
  • TSO/DSO cooperation and information exchange
  • New market concepts and roles
  • Experience from implementing Clean Energy Package and Network Codes
  • Dialogue based regulation
  • New tariff structures
  • Quality regulation benchmark
  • New aspects in regulation (storage/charging/local markets)
  • Estimating and enabling flexibility potential
  • Incentives for reducing losses, improving energy efficiency and increasing network utilisation

DSO RISK MANAGEMENT IN A DISRUPTIVE ENVIRONMENT

  • Business steering through risk management
  • Information management and cyber security
  • Adapting to increased climate risk
  • Handling GDPR within the DSO responsibility
  • Securing necessary (new) skills and competences
  • Balance investment timing vs risk
  • Use of risk standards to improve business performance

ELECTRIFICATION, ACTIVE CUSTOMERS AND LOCAL ENERGY COMMUNITIES

  • Engaging the customer
  • New customer demands and future of prosumers
  • Coping with electrification of transport
  • Local energy optimisation (electric, heating, cooling)
  • Implementing Citizen Energy Communities (CEC)
  • Different solutions for local markets
  • Smart Cities
  • Experience with demand response
  • Integrating markets and implementing local markets
  • How DSOs support sustainability
  • Off-grid; a real alternative?

INFORMATION AND DIGITALISATION DRIVING THE FUTURE DSO BUSINESS

  • Usage of smart meter information
  • Information platforms and data hubs
  • Access to data, exchange/sharing of data
  • Analytics & AI case studies
  • Demand prognosis
  • Added value through additional data sources like GIS, weather, statistical etc.