SDG&E's state of the art energy storage and microgrid systems [WEBINAR] - 1/29/20

SDG&E's state of the art energy storage and microgrid systems [WEBINAR] - 1/29/20

by Kirsten Petersen (SDG&E) · View the channel on PSI

Applied Sciences & Engineering Energy THEnergy technology and engineeringTHYEnergy, power generation, distribution and storage
🎙 Kirsten Petersen (SDG&E) 👥 249 📅 January 30, 2020 ⏱ 64 min 👁 287 📄 expert opinion 🧭 2026-10-10
Available in: English (current) Français

Keywords

microgridenergy storageSDG&Elithium-ionvanadium redox flow batteryresiliencerenewable integrationCalifornia policies

Summary

This webinar, presented by Kirsten Petersen of San Diego Gas & Electric (SDG&E), provides an overview of the utility’s energy storage and microgrid systems. Petersen, a senior engineer in the distributed energy resources group, walks viewers through three specific installations: the Carmel Valley Energy Storage System, the Borrego Springs Microgrid, and the Miguel Energy Storage System. The Carmel Valley system uses lithium-ion batteries to seamlessly island a critical load (a school gymnasium used as an evacuation center). The Borrego Springs Microgrid, operational since 2010, serves an isolated desert community and can operate independently using a combination of batteries, solar, and a diesel generator (being phased out). The Miguel system features a vanadium redox flow battery, a non-combustible technology with long lifespan, provided by Sumitomo Electric in a demonstration project. Petersen also discusses regulatory drivers like Senate Bill 100 and CPUC mandates, as well as technical benefits such as PV smoothing, frequency regulation, and outage mitigation. The presentation includes technical details on system topologies, control systems, and integration with the CAISO market.

171 words

Critical Evaluation

Value of the Information & Strength of the Argument

The information presented has high practical value as it comes directly from an engineer involved in the design and operation of these systems. The speaker provides detailed insights into the unique features of each project, including specific capacities, chemistries, and control strategies. The argumentation is coherent and factual, based on real-world deployments and operational data. However, the presentation is naturally biased towards showcasing SDG&E’s achievements and does not critically discuss limitations or failures. The technical depth is moderate, suitable for a professional audience but not for deep technical specialists.

Scientific Rigor, Source Quality, Title Accuracy

The rigour is moderate; the presenter cites regulatory mandates and mentions a partnership with Japanese organizations (NEDO and Sumitomo Electric) but does not provide external references. The title accurately reflects the content, which is a tour of three specific installations. The webinar is more of an informational/educational talk than a rigorous scientific study. The lack of peer-reviewed sources and independent validation reduces the scientific rigour. The description includes a link to slides, which is a useful resource.

181 words

Title / Content Match

The title accurately reflects the content: a presentation on SDG&E's energy storage and microgrid systems, including specific examples.

Quality & Reliability

7/10

Presentation by a senior engineer from a major utility, based on real projects and operational experience. However, it is a promotional/educational webinar without peer review or independent verification. Details are factual but rely on company data.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

Concurring Sources

Dissenting Sources

  • No discordant sources mentioned — The video does not present conflicting information from other sources.

Contribution & Novelties

The webinar provides a firsthand account of specific utility-scale energy storage and microgrid projects, offering practical insights into their design, operation, and challenges. It highlights the integration of different battery chemistries (lithium-ion and vanadium redox flow) and the use of microgrids for resilience against planned and unplanned outages. The discussion of PV smoothing and the role of community energy storage is particularly informative.

Pour aller plus loin :

  • Microgrid — General concept of microgrids and their applications.
  • Vanadium redox battery — Detailed explanation of the vanadium redox flow battery technology.
  • Senate Bill 100 (California) — Overview of California’s clean energy goals.
  • CAISO — Information on the California Independent System Operator and market participation.

113 words

Radar Profile

The radar profile shows high quantity of information and moderate quality and technical level, with a slightly lower reliability score, reflecting the promotional nature of the webinar but the factual basis of the content.

Reliability 6/10