ALPSS: Fast, Transparent Power Grid Intelligence Tools

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Prototype scenarios, stress-test decisions, and plan with confidence using a lightweight, open, and fast analytics platform.

A New Category of Power Grid Intelligence

North America’s power sector is evolving faster than traditional power grid modeling tools can keep up. Increased electricity demand from data centers, onshoring of manufacturing, electric vehicles adoption, distributed energy resource (DER) growth, rising reliability expectations, and regulatory changes demand a more agile way to plan.

ALPSS (Accessible, Lightweight Power Sector Simulation Model) is RTI’s next-generation platform built for today’s grid realities:

Fast, lightweight modeling for rapid scenario testing
Transparent, open-source architecture trusted by regulators and the private sector
Easy access through a free browser-based interface (Beta)
Enables impact analysis that balances performance with community and environmental concerns

ALPSS is designed to democratize power grid planning, accelerate innovation, and make uncertainty manageable. Go to ALPSS.

What Makes ALPSS Different

Fast, Lightweight Scenario Prototyping

ALPSS delivers capacity expansion and production cost modeling using reduced-form linear optimization, enabling users to run dozens or hundreds of scenarios in the time legacy tools solve one. Ideal for exploring uncertainties across:

Electric vehicle (EV) adoption
Distributed solar and storage uptake
Policy shifts and implications
Transmission constraints
Load growth and DER saturation

Utilities and energy companies can quickly test ideas, compare futures, and de-risk decisions before investing in PROMOD, Plexos, or EnCompass.

Accessible Tools for the Whole Energy Ecosystem

Unlike high-cost platforms, ALPSS offers a free, browser-based interface in Beta, making sophisticated planning available to:

Smaller municipal and cooperative utilities
State agencies and public advocates
Corporate energy buyers exploring 24/7 carbon-free energy strategies
Consulting firms that need a flexible, customizable engine

ALPSS removes barriers to entry and enables broader participation in power grid planning.

Open, Transparent, and Stakeholder Ready

ALPSS eliminates the black-box problem. Assumptions are clear, modifiable, and easy to communicate. This transparency is uniquely valuable for:

Regulators seeking defensible, auditable modeling
Corporate buyers wanting unbiased emissions accounting
Developers and original equipment manufacturers needing evidence for filings
Community and stakeholder groups assessing distributional impacts

ALPSS builds trust in power grid modeling, which is critical in contested dockets, integrated resource plans, rate cases, policymaking and community engagement settings.

Unmatched Insight into Electrification and Community Impacts

ALPSS is uniquely engineered to quantify distributional impacts, including:

Load shifts from increased charging demand during peak generation
Community exposure
Fossil fallback risks
Spatial variations in grid decarbonization

ALPSS integrates community and system-level emissions analysis as a core feature.

See ALPSS in Action

Transportation Electrification: What's the Cost?

ALPSS shows how transportation electrification affects the power grid and emissions—quickly and transparently. Modeling with ALPSS demonstrates that even large increases in electricity demand from electric vehicles add only modest power-sector emissions while delivering major transportation-sector reductions. It also helps planners test different grid futures and confirm that a renewables-heavy system can support electrification without shifting pollution to nearby communities.