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topics:grid [2026/03/19 22:08] – admintopics:grid [2026/03/19 23:33] (current) – Status updated to development admin
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 sensitivity: low sensitivity: low
 ai-disclosure: Claude Sonnet 4.6 (Anthropic) assisted with research synthesis and section drafting; all sources independently verified. ai-disclosure: Claude Sonnet 4.6 (Anthropic) assisted with research synthesis and section drafting; all sources independently verified.
-status: draft+status: development
 short-desc: Architecture, layers, and governance configurations of electricity transmission and distribution networks, including smart grid architectural frameworks. short-desc: Architecture, layers, and governance configurations of electricity transmission and distribution networks, including smart grid architectural frameworks.
 </WRAP> </WRAP>
  
 <WRAP intro> <WRAP intro>
-The grid refers to the interconnected network of transmission and distribution infrastructure through which electricity flows from generation sources to end-users, increasingly also in reverse.+The grid refers to the interconnected network of transmission and distribution infrastructure through which electricity flows from generation sources to end-users.
 </WRAP> </WRAP>
  
-Smart grid transitions are reconfiguring grid architecture at multiple levels. At the transmission level, new interconnectors and grid-forming inverters are changing how system inertia and frequency regulation work. At the distribution level, the proliferation of rooftop solar, batteries, and electric vehicles is turning networks designed for one-way power flow into active systems with bidirectional flows. The concept of the grid is expanding to include communication infrastructure, data platforms, and logical coordination layers alongside the physical wires and transformers.+Smart grid transitions are reconfiguring grid architecture at multiple levels. At the transmission level, new interconnectors and grid-forming inverters are changing how system inertia and frequency regulation work. At the distribution level, the proliferation of rooftop solar, batteries, and electric vehicles is turning networks designed for one-way power flow into active systems with bidirectional flows. The concept of the grid is expanding to include communication infrastructure, data platforms, and logical coordination layers alongside the physical wires and transformers.((Farhangi, H. (2010). The path of the smart grid. //IEEE Power and Energy Magazine//, 8(1), 18–28. https://doi.org/10.1109/MPE.2009.934876))
  
 ===== A shared definition ===== ===== A shared definition =====
  
-The grid encompasses the physical infrastructure of electricity transmission and distribution — lines, cables, transformers, substations, and switching equipment — together with the communication systems, control architectures, and logical coordination functions that manage power flows across it. In the context of smart grid transitions, "grid" is often used to denote the full socio-technical system: not just the wires, but also the standards, ownership arrangements, operational rules, and data flows that determine how the physical network behaves.+The grid encompasses the physical infrastructure of electricity transmission and distribution — lines, cables, transformers, substations, and switching equipment — together with the communication systems, control architectures, and logical coordination functions that manage power flows across it. In smart grid contexts, "grid" often denotes the full socio-technical system: not just the wires, but also the standards, ownership arrangements, operational rules, and data flows that determine how the physical network behaves.
  
-A useful distinction separates the **transmission system** — high-voltage, long-distance, interconnected at national or regional scale — from the **distribution system** — medium and low voltage, reaching end-users, historically passive and radial in design. Smart grid development is most pronounced at the distribution level, where new actors, devices, and services are creating coordination challenges the original architecture was not designed for.+A useful distinction separates the **transmission system** (high-voltage, long-distance, interconnected at national or regional scale) from the **distribution system** (medium and low voltage, reaching end-users, historically passive and radial in design). Smart grid development is most pronounced at the distribution level, where new actors, devices, and services create coordination challenges the original architecture was not designed for.
  
 ===== Grid architecture: layers and domains ===== ===== Grid architecture: layers and domains =====
  
-Several reference frameworks have been developed to describe smart grid architecture systematically, supporting interoperability planning, standards development, and the design of new grid services. Three frameworks are in widespread use internationally.+Several reference frameworks have been developed to describe smart grid architecture systematically, supporting interoperability planning, standards development, and the design of new grid services.
  
 ==== Smart Grid Interoperability Reference Model (SGIRM) ==== ==== Smart Grid Interoperability Reference Model (SGIRM) ====
  
-The SGIRM, originally developed in IEEE Std 2030-2011 and updated in IEEE 2030.4-2023, organises smart grid architecture around three integrated architectural perspectives (IAPs) and three physical domains.((IEEE (2023). //2030.4-2023 — IEEE Guide for Control and Automation Installations Applied to the Electric Power Infrastructure//. IEEE.))+The SGIRM, originally developed in IEEE Std 2030-2011 and updated in IEEE 2030.4-2023, organises smart grid architecture around three integrated architectural perspectives (IAPs) and three physical domains.((IEEE (2023). //2030.4-2023 — IEEE Guide for Control and Automation Installations Applied to the Electric Power Infrastructure//. IEEE. https://ieeexplore.ieee.org/document/10326147/))
  
-The three IAPs cover, respectively: components and functions (physical assets including generation, storage, loads, and transmission and distribution infrastructure, together with their built-in control functions); information and communications (data models and communication systems supporting asset control, protection, and intelligent functions); and business and economics (market structures, fleet management, aggregation platforms, grid services transactions, tariffs, and regulatory and environmental considerations). The business and economics perspective was added in the 2023 revision to reflect the growing role of distributed energy resources (DER) and market-based coordination.+The three IAPs cover: components and functions (physical assets including generation, storage, loads, and transmission and distribution infrastructure, together with their built-in control functions); information and communications (data models and communication systems supporting asset control, protection, and intelligent functions); and business and economics (market structures, fleet management, aggregation platforms, grid services transactions, tariffs, and regulatory and environmental considerations). The business and economics perspective was added in the 2023 revision to reflect the growing role of distributed energy resources and market-based coordination.
  
-The three physical domains are: generation, storage and DER; transmission and distribution; and load/end-use (including EV charging, demand response, and HVAC). Three physical location zones cut across these domains: grid-edge (load/customer end), field/substation, and enterprise/cloud.+The three physical domains are: generation, storage, and DER; transmission and distribution; and load/end-use (including EV charging, demand response, and HVAC). Three physical location zones cut across these domains: grid-edge (load/customer end), field/substation, and enterprise/cloud.
  
 ==== GridWise Transactive Energy Framework (GWAC) ==== ==== GridWise Transactive Energy Framework (GWAC) ====
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 The GridWise Architecture Council's Transactive Energy Framework provides a conceptual architecture for designing systems that use economic and control techniques together to improve grid reliability and efficiency.((GWAC (2019). //GridWise Transactive Energy Framework, Version 1.1//. GridWise Architecture Council. https://gridwiseac.org/pdfs/pnnl_22946_gwac_te_framework_july_2019_v1_1.pdf)) The GridWise Architecture Council's Transactive Energy Framework provides a conceptual architecture for designing systems that use economic and control techniques together to improve grid reliability and efficiency.((GWAC (2019). //GridWise Transactive Energy Framework, Version 1.1//. GridWise Architecture Council. https://gridwiseac.org/pdfs/pnnl_22946_gwac_te_framework_july_2019_v1_1.pdf))
  
-The GWAC Stack organises interoperability across three broad groupings: technical (basic connectivity, network interoperability, syntactic interoperability); informational (semantic understanding, business context, business procedures); and organisational (business objectives, economic/regulatory policy). Transactive energy spans all three groupings, linking physical and cyber infrastructure at the lower levels with business models, market structures, and regulation at the upper levels. A conceptual architecture defines the abstract components and their relationships; logical and physical architectures specify how those components are structured and instantiated.+The GWAC Stack organises interoperability across three broad groupings: technical (basic connectivity, network interoperability, syntactic interoperability); informational (semantic understanding, business context, business procedures); and organisational (business objectives, economic and regulatory policy). Transactive energy spans all three groupings, linking physical and cyber infrastructure at the lower levels with business models, market structures, and regulation at the upper levels.
  
-{{:topics:grid_gwac_stack.png|Figure: GWAC Stack with strata of transactive energy. Source: GridWise Architecture Council (2019).}}+[Figure: GWAC Stack with strata of transactive energy. Source: GWAC (2019).]
  
 ==== Smart Grid Architecture Model (SGAM) ==== ==== Smart Grid Architecture Model (SGAM) ====
  
-The SGAM, developed by the CEN-CENELEC-ETSI Smart Grid Coordination Group and adopted as the reference architecture for EU smart grid standardisation, represents grid architecture as a three-dimensional model.((CEN-CENELEC-ETSI Smart Grid Coordination Group. //Smart Grid Architecture Model (SGAM)//.  https://digital-strategy.ec.europa.eu/en/policies/eu-policy-digitalisation-energy))+The SGAM, developed by the CEN-CENELEC-ETSI Smart Grid Coordination Group and adopted as the reference architecture for EU smart grid standardisation, represents grid architecture as a three-dimensional model.((CEN-CENELEC-ETSI Smart Grid Coordination Group. //Smart Grid Architecture Model (SGAM) Framework//. https://digital-strategy.ec.europa.eu/en/policies/eu-policy-digitalisation-energy))
  
-The three axes are: **Domains** (the physical energy conversion chain: generation, transmission, distribution, DER, customer premises); **Zones** (operational hierarchy from process to field, station, operation, enterprise, and market); and **Interoperability Layers** (component, communication, information, function, and business). Use cases are mapped into this three-dimensional space, making explicit which domains, zones, and layers a given smart grid function involves and where interoperability requirements arise.+The three axes are: **Domains** (the physical energy conversion chain: generation, transmission, distribution, DER, customer premises); **Zones** (operational hierarchy from process to field, station, operation, enterprise, and market); and **Interoperability layers** (component, communication, information, function, and business). Use cases are mapped into this three-dimensional space, making explicit which domains, zones, and layers a given smart grid function involves and where interoperability requirements arise.
  
-{{:topics:grid_sgam_3d.png|Figure: Smart Grid Architecture Model (SGAM) — three-dimensional representation across Domains, Zones, and Interoperability Layers. Source: CEN-CENELEC-ETSI Smart Grid Coordination Group.}}+[Figure: SGAM three-dimensional representation across Domains, Zones, and Interoperability Layers. Source: CEN-CENELEC-ETSI Smart Grid Coordination Group.]
  
 ===== Network architecture and governance ===== ===== Network architecture and governance =====
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 Beyond technical architecture, the configuration of a grid network has governance implications. A WG7 analytical framework developed by Klaus Kubeczko maps the relationship between network architecture (the hardware, software, orgware, and spatial configuration of the network) and two further dimensions: the logical layer (algorithms and ledger systems), and the policy layer (decision power over the rules of the system).((Kubeczko, K. (2017). //Die Rolle von Smart Grids in der Transition zu nachhaltigen Energiesystemen//. Keynote, IEA Vernetzungstreffen, Salzburg, 12 October 2017.)) Beyond technical architecture, the configuration of a grid network has governance implications. A WG7 analytical framework developed by Klaus Kubeczko maps the relationship between network architecture (the hardware, software, orgware, and spatial configuration of the network) and two further dimensions: the logical layer (algorithms and ledger systems), and the policy layer (decision power over the rules of the system).((Kubeczko, K. (2017). //Die Rolle von Smart Grids in der Transition zu nachhaltigen Energiesystemen//. Keynote, IEA Vernetzungstreffen, Salzburg, 12 October 2017.))
  
-The resulting cross-tabulations — network architecture against logical configuration, and network architecture against governance/policy configuration — reveal how different combinations produce structurally distinct grid types, from centralised national monopolies to distributed locally co-owned grids.+Cross-tabulating network architecture against logical and governance configurations reveals how different combinations produce structurally distinct grid types, from centralised national monopolies to distributed locally co-owned grids.
  
-**Network architecture and logical layer**+**Network architecture × logical layer**
  
-^ Logical (algorithms / ledger system) ^^ Network Architecture ^^^ +^ Logical layer ^^ Network architecture ^^^ 
-^ ^ ^ Centralised ^ Decentralised ^ Distributed ^ +|  |  | Centralised | Decentralised | Distributed | 
-| Centralised || Trusted National TSO | Smart Meter national ledger (Sweden) | Blockchain ledger for direct interaction | +| Centralised |  | Trusted National TSO | Smart Meter national ledger (e.g. Sweden) | Blockchain ledger for direct interaction | 
-| Decentralised || Markets and market institutions | Markets and market institutions; Smart Meter ledger by DSOs | Markets and market institutions | +| Decentralised |  | Markets and market institutions | Markets and market institutions; Smart Meter ledger by DSOs | Markets and market institutions | 
-| Distributed || Bilateral contract solutions | Bilateral contract solutions | Bilateral contract solutions |+| Distributed |  | Bilateral contract solutions | Bilateral contract solutions | Bilateral contract solutions |
  
-**Network architecture and policy layer**+**Network architecture × policy layer**
  
-^ Policy (decision power for rules) ^^ Network Architecture ^^^ +^ Policy layer ^^ Network architecture ^^^ 
-^ ^ ^ Centralised ^ Decentralised ^ Distributed ^ +|  |  | Centralised | Decentralised | Distributed | 
-| Centralised || Transmission Grid (national monopoly) | Super-Grid (global oligopoly) | Publicly owned local grids with local RES feed-in | +| Centralised |  | Transmission Grid (national monopoly) | Super-Grid (global oligopoly) | Publicly owned local grids with local RES feed-in | 
-| Decentralised || Private monopolies and oligopolies of multinationals | Distribution Grid (local monopoly); suppliers on market | Linked Mini-Grids; local grid with local RES (e.g. cooperative) | +| Decentralised |  | Private monopolies and oligopolies of multinationals | Distribution Grid (local monopoly); suppliers on market | Linked Mini-Grids; local grid with local RES (e.g. cooperative) | 
-| Distributed || People as shareholder; public voting | Local shareholders in monopoly | Linked Local Grids (locally co-owned, e.g. cooperatives, Energy Communities) |+| Distributed |  | People as shareholder; public voting | Local shareholders in monopoly | Linked Local Grids (locally co-owned, e.g. cooperatives, Energy Communities) |
  
 ===== Key terms ===== ===== Key terms =====
  
-; Transmission system +^ Term ^ Definition ^ 
-: High-voltage, long-distance network connecting large generation sources and bulk consumers across national or regional geographies. +| **Transmission system** | High-voltage, long-distance network connecting large generation sources and bulk consumers across national or regional geographies. | 
-; Distribution system +| **Distribution system** | Medium and low-voltage network delivering electricity to end-users; historically radial and passive, increasingly active with distributed generation and flexible loads. | 
-: Medium and low-voltage network delivering electricity to end-users; historically radial and passive, increasingly active with distributed generation and flexible loads. +| **Domain** | In SGAM, a segment of the physical energy conversion chain: generation, transmission, distribution, DER, and customer premises. | 
-; Domain +| **Zone** | In SGAM, a level of the operational hierarchy, from the physical process layer through field, station, operation, enterprise, and market. | 
-: In SGAM, a segment of the physical energy conversion chain (generation, transmission, distribution, DER, customer premises). +| **Interoperability layer** | In SGAM, one of five levels at which components, systems, or organisations must exchange meaningful information: component, communication, information, function, or business. | 
-; Zone +| **Transactive energy** | A control and coordination approach combining economic signals with physical control to balance supply, demand, and network constraints across distributed grid actors. | 
-: In SGAM, a level of the operational hierarchy, from physical process to enterprise and market. +| **Grid-edge** | Devices and systems at the load/customer end of the distribution network, including smart meters, inverters, EV chargers, and building energy management systems. |
-; Interoperability layer +
-: In SGAM, one of five levels at which components, systems, or organisations must be able to exchange meaningful information: component, communication, information, function, or business. +
-; Transactive energy +
-: A control and coordination approach combining economic signals with physical control to balance supply, demand, and network constraints across distributed grid actors. +
-; Grid-edge +
-: Devices and systems at the load/customer end of the distribution network, including smart meters, inverters, EV chargers, and building energy management systems.+
  
 ===== Distinctions and overlaps ===== ===== Distinctions and overlaps =====
  
-**Grid and network.** "Grid" in the electricity sector typically refers to the physical infrastructure of lines, cables, and transformers, together with its control and communication overlay. "Network" is used both in this technical sense and more broadly to describe actor-networks, communication networks, or logical coordination structures. The two overlap substantially in smart grid discourse, where the physical grid and its digital overlay are increasingly inseparable.+**Grid and network.** In electricity sector usage, "grid" typically refers to the physical infrastructure together with its control and communication overlay. "Network" covers this same technical meaning and also the broader sense of actor-networks and logical coordination structures. The two overlap substantially in smart grid discourse, where physical and digital layers are increasingly inseparable.
  
-**Grid architecture and grid operation.** Architectural frameworks such as SGAM, SGIRM, and GWAC describe the structural composition of the grid, the layers it contains, and the interfaces between them. Grid operation — frequency regulation, voltage control, balancing, ancillary services — concerns how that structure performs in real time. The two are related but distinct: architectural choices constrain and enable operational possibilities, but operational functions are treated separately in the [[topics:operability|Operability]] topic.+**Grid architecture and grid operation.** Architectural frameworks such as SGAM, SGIRM, and GWAC describe the structural composition of the grid: the layers it contains and the interfaces between them. Grid operation covers how that structure performs in real time, including frequency regulation, voltage control, and balancing. Architectural choices constrain and enable operational possibilities, but operational functions are treated separately in the [[topics:operability|Operability]] topic.
  
 **Centralised, decentralised, and distributed.** These terms describe both physical network topology and governance logic. A centralised physical network is not the same as centralised governance, and combinations of the two produce structurally distinct system types with different implications for ownership, participation, and resilience. See [[topics:decentralization|Decentralisation]]. **Centralised, decentralised, and distributed.** These terms describe both physical network topology and governance logic. A centralised physical network is not the same as centralised governance, and combinations of the two produce structurally distinct system types with different implications for ownership, participation, and resilience. See [[topics:decentralization|Decentralisation]].
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 ===== Related topics ===== ===== Related topics =====
  
-[[topics:infrastructure|Infrastructure]], [[topics:digitalization|Digitalisation]], [[topics:decentralization|Decentralisation]], [[topics:grid_edge|Grid Edge]], [[topics:grid_ownership|Grid Ownership]], [[topics:systems|Systems]], [[topics:energy_logistics|Energy Logistics]], [[topics:service|Service]]+[[topics:infrastructure|Infrastructure]], [[topics:digitalization|Digitalisation]], [[topics:decentralization|Decentralisation]], [[topics:grid_edge|Grid Edge]], [[topics:grid_ownership|Grid Ownership]], [[topics:energy_logistics|Energy Logistics]], [[topics:operability|Operability]]
  
 ===== References ===== ===== References =====
- 
-CEN-CENELEC-ETSI Smart Grid Coordination Group. //Smart Grid Architecture Model (SGAM) Framework//. https://digital-strategy.ec.europa.eu/en/policies/eu-policy-digitalisation-energy 
- 
-Farhangi, H. (2010). The path of the smart grid. //IEEE Power and Energy Magazine//, 8(1), 18–28. https://doi.org/10.1109/MPE.2009.934876 
- 
-GWAC (2019). //GridWise Transactive Energy Framework, Version 1.1//. GridWise Architecture Council. https://gridwiseac.org/pdfs/pnnl_22946_gwac_te_framework_july_2019_v1_1.pdf 
- 
-IEEE (2023). //2030.4-2023 — IEEE Guide for Control and Automation Installations Applied to the Electric Power Infrastructure//. IEEE. 
- 
-Kubeczko, K. (2017). //Die Rolle von Smart Grids in der Transition zu nachhaltigen Energiesystemen//. Keynote, IEA Vernetzungstreffen, Salzburg, 12 October 2017. 
- 
-NIST (2021). //Framework and Roadmap for Smart Grid Interoperability Standards, Release 4.0//. National Institute of Standards and Technology. https://www.nist.gov/ctl/smart-connected-systems-division/smart-grid-group/smart-grid-framework