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topics:grid [2026/03/19 23:32] – Status updated to published admintopics:grid [2026/04/18 01:25] (current) – vso_vso
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-<WRAP catbadge slate>Technology & Infrastructure</WRAP>+<WRAP catbadge slate>Technology and Infrastructure</WRAP>
  
 ====== Grid ====== ====== Grid ======
  
 <WRAP meta> <WRAP meta>
-lead-authors: [Name] +lead-authors: 
-contributors: [Names] +contributors: 
-reviewers: [Names] +reviewers: 
-version: 2.0 +version: 0.5 
-updated: 19 March 2026+updated: 26 March 2026
 sensitivity: low sensitivity: low
-ai-disclosure: Claude Sonnet 4.6 (Anthropic) assisted with research synthesis and section drafting; all sources independently verified. +ai-use: Claude Sonnet 4.6 (Anthropic) was used to split and restructure content from the combined grid/architecture draft; reviewed by Vitaliy Soloviy, 26 March 2026 
-status: published +status: draft
-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.+The grid is the interconnected network of transmission and distribution infrastructure through which electricity flows. Smart grid transitions are reconfiguring it at both levels: at transmission level, new interconnectors and grid-forming inverters are changing how system inertia and frequency regulation work; at distribution/local level, rooftop solar, batteries, and electric vehicles are turning networks designed for one-way power flow into active systems with bidirectional flows.((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))
 </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.((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))+===== Why this matters =====
  
-===== A shared definition =====+Grids were designed around a simple logic: large generators at one end, passive consumers at the other, with transmission and distribution as the delivery pipe. Smart grid transitions break this logic at every point. Generation is now distributed across millions of small sites. Demand is increasingly flexible and, with storage and EVs, can feed back into the grid. The distribution network, which was never designed for two-way flows, becomes a coordination challenge.
  
-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.+<WRAP callout> 
 +Grid ownership, operation and regulation shape which transitions are possible and who can participate in them. 
 +</WRAP>
  
-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.+===== Shared definitions =====
  
-===== Grid architecture: layers and domains =====+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, the 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.
  
-Several reference frameworks have been developed to describe smart grid architecture systematically, supporting interoperability planning, standards development, and the design of new grid services.+^ Term ^ Definition ^ 
 +| **Transmission system** | High-voltage, long-distance network connecting large generation sources and bulk consumers across national or regional geographies | 
 +| **Distribution system** | Medium and low-voltage network delivering electricity to end-users; historically radial and passive, increasingly active with distributed generation and flexible loads | 
 +| **Grid-edge** | Devices and systems at the load and customer end of the distribution network, including smart meters, inverters, EV chargers, and building energy management systems | 
 +| **Bidirectional flow** | Power flowing both from the grid to the customer and from the customer back to the grid, enabled by distributed generation and storage | 
 +| **Grid code** | The set of technical and operational standards that define how generators, operators, and other parties must interact with the grid |
  
-==== Smart Grid Interoperability Reference Model (SGIRM) ====+===== Perspectives =====
  
-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/))+<WRAP perspectives> 
 +==== Actors and stakeholders ====
  
-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 grid involves a structured set of actors with distinct mandates: transmission system operators managing high-voltage bulk transfer and frequency stability; distribution system operators managing local delivery and increasingly active coordination of distributed resources; generators and storage operators deciding when to inject or withdraw power; and users at the grid edge whose collective behaviour is increasingly shaping local network conditions. Ownership and operation of grid assets are often separated under unbundling rules, and the clarity of role definitions between entities shapes how investment decisions are made.
  
-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.+@@GAP@@ Case examples needed: one case illustrating a specific actor coordination challenge as the distribution network becomes more active (e.g. a jurisdiction where DSO and TSO responsibilities overlap or conflict); one non-EU case.
  
-==== GridWise Transactive Energy Framework (GWAC) ====+==== Technologies and infrastructure ====
  
-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 physical grid comprises conductors, transformers, switchgear, and protection systems operating across voltage levels from extra-high-voltage transmission lines to low-voltage distribution feeders. Smart grid transitions add communication and sensing layers to this physical infrastructure: smart meters, phasor measurement units, distribution automation systems, and SCADA platforms give operators visibility and control that was not possible in purely analogue networks. Inverter-based resources — solar, wind, and batteries — interact with the grid differently from rotating generators, changing how frequency and voltage are maintained.
  
-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.+@@GAP@@ Case examples needed: one case illustrating a specific physical grid challenge introduced by high penetration of distributed generation (e.g. voltage rise, reverse flows, protection coordination); one case from outside Europe.
  
-[Figure: GWAC Stack with strata of transactive energy. Source: GWAC (2019).]+==== Institutional structures ====
  
-==== Smart Grid Architecture Model (SGAM) ====+Grid ownership and regulatory design vary substantially across jurisdictions. Some grids are publicly owned natural monopolies; others are privately owned and regulated; some involve cooperative or municipal ownership structures particularly at distribution level. Unbundling rules separate network ownership from generation and retail in many regulatory frameworks, but the degree of separation and its effect on investment incentives differs widely. Grid codes specify the technical interface rules that govern how all actors connect and operate within the system.
  
-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))+@@GAP@@ Case examples needed: one case contrasting ownership models and their effect on grid investment or transition capacity; one non-European case.
  
-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. +</WRAP>
- +
-[Figure: SGAM three-dimensional representation across Domains, Zones, and Interoperability Layers. Source: CEN-CENELEC-ETSI Smart Grid Coordination Group.] +
- +
-===== Network architecture and governance ===== +
- +
-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.)) +
- +
-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 × logical layer** +
- +
-^ Logical layer ^^ Network architecture ^^^ +
-|  |  | Centralised | Decentralised | Distributed | +
-| 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 | +
-| Distributed |  | Bilateral contract solutions | Bilateral contract solutions | Bilateral contract solutions | +
- +
-**Network architecture × policy layer** +
- +
-^ Policy layer ^^ Network architecture ^^^ +
-|  |  | Centralised | Decentralised | Distributed | +
-| 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) | +
-| Distributed |  | People as shareholder; public voting | Local shareholders in monopoly | Linked Local Grids (locally co-owned, e.g. cooperatives, Energy Communities) | +
- +
-===== Key terms ===== +
- +
-^ Term ^ Definition ^ +
-| **Transmission system** | High-voltage, long-distance network connecting large generation sources and bulk consumers across national or regional geographies. | +
-| **Distribution system** | 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. | +
-| **Zone** | In SGAM, a level of the operational hierarchy, from the physical process layer through field, station, operation, enterprise, and market. | +
-| **Interoperability layer** | In SGAM, one of five levels at which components, systems, or organisations must 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.** 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.+<WRAP distinction> 
 +**Grid vs network**\\ 
 +In electricity sector usage, grid typically refers to physical infrastructure together with its control and communication overlay. Network covers the same technical meaning and also broader actor-networks and logical coordination structures. The two overlap substantially in smart grid discourse, where physical and digital layers are increasingly inseparable. 
 +</WRAP>
  
-**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.+<WRAP distinction> 
 +**Grid vs grid architecture**\\ 
 +Grid refers to the physical network and its operation. Grid architecture refers to the conceptual frameworks — SGAM, SGIRM, GWAC — used to map the layers and domains of that system for purposes of standards development, interoperability planning, and governance analysis. The two are related but distinct: one is the thing, the other is the map. See the [[topics:grid_architecture|Grid architecture]] topic. 
 +</WRAP>
  
-**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]].+<WRAP distinction> 
 +**Transmission vs distribution**\\ 
 +These two sub-systems differ in voltage level, geographic scale, physical topology, operator mandate, and the nature of the coordination challenge. Transmission is meshed, high-voltage, and designed for bulk transfer between large nodes. Distribution is radial (or weakly meshed), lower voltage, and designed for final delivery — a design that is under pressure as distributed resources proliferate. 
 +</WRAP>
  
 ===== Related topics ===== ===== Related topics =====
  
-[[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]] +[[topics:grid_architecture|Grid architecture]] · [[topics:grid_edge|Grid edge]] · [[topics:grid_ownership|Grid ownership]] · [[topics:operator|Operator]] · [[topics:energy_logistics|Energy logistics]] · [[topics:operability|Operability]] · [[topics:resilience|Resilience]]
- +
-===== 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+===== Topic notes =====
  
-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/+Split from combined grid/architecture draft on 26 March 2026. This file covers the physical network concept. Architecture frameworks (SGIRM, GWAC, SGAM) and the tables are in grid_architecture.dokuwiki.
  
-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+~~DISCUSSION|Discussion~~