Smart Grids

Battery Energy Storage Systems

Defining and Describing Smart Grids

Smart grids turn the electricity network from a one-way delivery system into a responsive, data-enabled system that can coordinate supply, demand, storage, and distributed generation. ^{[1] [2]}

A smart grid is an electricity network that combines digital communication, sensors, automation, and real-time data with conventional power infrastructure. ^{[1] [2]} It supports two-way flows of electricity and information, enabling utilities and customers to respond more precisely to changing demand, system conditions, and renewable generation. ^{[1] [2]} The concept applies across transmission, distribution, buildings, campuses, industrial sites, neighborhoods, and microgrids. ^{[3] [2]} Its importance lies in improving reliability, integrating distributed energy resources, supporting demand response, and allowing local systems to operate independently during disruptions. ^{[3] [2]}

flowchart LR
G["Central generation"] --> T["Transmission network"]
R["Renewable generation"] --> D["Distribution network"]
T --> D
D --> H["Homes and businesses"]
D --> M["Microgrids"]
S["Energy storage"] --> D
H -->|"Uses and supplies electricity"| D
M -->|"Can operate independently"| D
H -->|"Sends data and status"| C["Control and communications"]
M -->|"Sends data and status"| C
D -->|"Sends measurements"| C
C -->|"Sends control signals"| D

Uses in Context

• Grid modernization: “Smart grid” describes the modernization of electricity infrastructure through digital monitoring, communications, automation, and control. ^{[1] [2]}

• Demand response: The term is invoked when consumers or automated systems change electricity use in response to prices or grid conditions, helping reduce peaks and improve reliability. ^[4]

• Renewable integration: Smart-grid language commonly describes the coordination of intermittent solar and wind generation with storage, flexible demand, and distributed controls. ^{[3] [2]}

• Microgrids and resilience: A smart grid may refer to local systems that combine distributed generation, storage, controls, and islanding capability to maintain service during a main-grid outage. ^{[3] [2]}

• Energy management: In research and engineering, the term encompasses real-time optimization of generation, storage, loads, and electricity flows. ^{[5] [6]}

• Digital transformation of utilities: The concept is used to signal a shift from passive infrastructure toward networks that continuously measure conditions and act on operational data. ^{[1] [2]}

History of Use

Origins

• The modern smart-grid formulation is strongly associated with S. Massoud Amin and Bruce F. Wollenberg’s 2005 article, Toward a Smart Grid: Power Delivery for the 21st Century, published in IEEE Power & Energy Magazine. ^{[7] [8]}

• The article framed smart grids as a response to the needs of twenty-first-century power delivery, linking electricity infrastructure with advanced information and communications technologies. ^{[2] [7]}

• The concept did not represent a wholly new electrical network; rather, it described the digital enhancement of an existing grid through sensing, communications, automation, and coordinated control. ^{[1] [2]}

Evolution

• 2005 — Digital power-delivery framework: Amin and Wollenberg helped establish “smart grid” as a recognized term for applying advanced information and communications technologies to electricity delivery. ^{[2] [7]}

• 2007 — Benefits and modernization agenda: U.S. Department of Energy modernization work broadened the concept toward reliability, efficiency, resilience, customer participation, and the integration of emerging energy resources. ^[9]

• 2020s — Distributed and autonomous flexibility: Smart-grid research increasingly focuses on microgrids, real-time pricing, electric-vehicle interaction, machine learning, energy communities, and coordinated distributed generation and storage. ^{[2] [5] [6] [4]}

Best Real-World Examples

• Bronzeville Community Microgrid — A Chicago microgrid serving more than 1,000 customers and combining solar PV, battery storage, and natural-gas generation. ^[3]

• PVZEN Microgrid Laboratory — A Politecnico di Torino research facility using near-real-time control of photovoltaic panels, lithium batteries, inverters, and prosumer flexibility. ^[5]

• Orcas Center Community Microgrid — An island system combining solar, storage, and generators for grid-connected and islanded operation. ^[10]

• Commercial-building hierarchical microgrid — A microgrid implementation using centralized hierarchical control that reduced electricity costs for connected loads by 19.5%. ^[11]

• University of the Free State QwaQwa campus system — A solar-diesel hybrid system designed to continue operating through frequent grid interruptions. ^[12]

• Barbados Light & Power demand-response pilot — A pilot using automated tertiary-level demand response to shift non-critical loads during outages or generator-only operation. ^[12]

• Togolese telecom microgrid — An AI-optimized solar microgrid for telecommunications and local loads that reportedly achieved approximately 98.9% solar utilization. ^[1]

Case Studies

Bronzeville Community Microgrid, Chicago. ComEd developed the grid-connected Bronzeville Community Microgrid in Chicago as a local resilience and distributed-energy project. ^[3] The system serves more than 1,000 customers, including schools, senior housing, and emergency services. ^[3] Its reported assets include 750 kilowatts of solar PV, 500 kilowatts/2 megawatt-hours of battery storage, and 5 megawatts of natural-gas generation. ^[3] The project shows how smart-grid ideas become operational at neighborhood scale: local generation, storage, monitoring, and controllability are combined to support critical loads and improve resilience. ^[3]

Orcas Center island microgrid. A community-driven island project at Orcas Center combines solar generation, energy storage, and backup generation for both grid-connected and islanded operation. ^[10] The system is designed to offset an estimated 87% of annual electricity demand and provide as much as 56 hours of resilience in darker winter conditions. ^[10] In sunnier periods, the project is intended to support near-continuous islanded operation. ^[10] The case illustrates the value of smart-grid architecture in locations where fuel logistics, outage exposure, and limited interconnection capacity make local flexibility especially valuable. ^[10]

PVZEN Microgrid Laboratory, Politecnico di Torino. Researchers at Politecnico di Torino implemented a flexibility-management system operating at approximately 30-second intervals. ^[5] The system coordinates real photovoltaic panels, lithium batteries, inverters, a prosumer, and an energy community to manage power deviations and behind-the-meter flexibility. ^[5] Unlike a purely conceptual simulation, the laboratory uses physical equipment and real operating behavior. ^[5] The case demonstrates the research direction of smart grids: increasingly fine-grained measurement and control, coordinated distributed resources, and active participation by electricity users rather than passive consumption. ^[5]

Sources