R2X

Translation plugins for power system models.
ReEDS, PLEXOS, Sienna

Installation · Quick Start · Architecture · Plugins · Ecosystem · Compatibility · Docs · Contributing

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This repo houses the translation plugins for the r2x ecosystem. The r2x-cli is the orchestrator for all r2x plugins — parsers, transforms, translations, and exporters. It discovers installed plugins, chains them into pipelines, and manages Python environments.

The plugins in this repo handle the translation step: converting a parsed source system into a target format. They sit between parsers (like reeds-parser or sienna-parser) and exporters (like plexos-parser or sienna-exporter), all of which are separate packages the CLI can chain together.

Translations are driven by declarative JSON rules that map source components to target components, with @getter-decorated functions handling any derived values.

Installation

Prerequisites

• Python 3.11, 3.12, or 3.13
• The r2x-cli

Install the CLI

See the r2x-cli README for install instructions. The CLI manages its own Python environment and handles plugin installation.

Install a translation plugin

Each plugin is published independently on PyPI. The CLI pulls in any required dependencies (model packages, r2x-core, etc.) automatically:

# Install via the CLI (recommended)
r2x install r2x-reeds-to-plexos
r2x install r2x-sienna-to-plexos

# Or install directly if managing your own environment
pip install r2x-reeds-to-plexos

Available plugins:

Plugin	PyPI
r2x-reeds-to-plexos
r2x-reeds-to-sienna
r2x-plexos-to-sienna
r2x-sienna-to-plexos

Tip

We recommend uv if you are managing Python environments yourself.

Quick Start

Using the CLI

The r2x CLI discovers all installed plugins automatically:

# List every plugin the CLI can see (parsers, transforms, translations, exporters)
r2x list

# Scaffold a pipeline template
r2x init

# Run a named pipeline
r2x run pipeline.yaml my-pipeline

# Preview without writing output
r2x run pipeline.yaml my-pipeline --dry-run

# Run a single plugin directly
r2x run plugin reeds-parser --show-help

A pipeline.yaml chains plugins from across the ecosystem. Parsers, translations, and exporters can all live in the same pipeline — the CLI pipes each step's output into the next:

variables:
  run_folder: /path/to/reeds/run
  output_dir: output

pipelines:
  reeds-to-plexos:
    - r2x-reeds.reeds-parser           # from r2x-reeds
    - r2x-reeds-to-plexos.translation  # from this repo
    - r2x-plexos.plexos-exporter       # from r2x-plexos

config:
  reeds-parser:
    run_folder: ${run_folder}
    solve_year: 2050
    weather_year: 2012
  plexos:
    output: ${output_dir}

Using the Python API

Each translation plugin exposes a perform_translation function that takes a PluginContext and returns a translated System:

import json
from importlib.resources import files

from r2x_core import PluginContext, Rule, System, apply_rules_to_context
from r2x_core.logger import setup_logging

setup_logging(level="INFO")

# Build a context with your source system and config
context = PluginContext(config=my_config)
context.source_system = source_system  # parsed ReEDS/PLEXOS/Sienna system

# Load and apply translation rules
rules_path = files("r2x_reeds_to_plexos.config") / "rules.json"
context.rules = Rule.from_records(json.loads(rules_path.read_text()))

# Run the rule engine
result = apply_rules_to_context(context)
result.summary()  # prints a rich table of per-rule results

translated_system = context.target_system

See each plugin's README under packages/ for complete examples.

Architecture

graph LR
    subgraph "r2x-cli · Rust"
        CLI[Pipeline Runner]
    end

    subgraph "Parsers"
        RP[reeds-parser]
        PP[plexos]
        SP[sienna-parser]
    end

    subgraph "Transforms"
        TR[add-ccs-credit<br/>add-imports<br/>break-gens<br/>...]
    end

    subgraph "Translations · this repo"
        T1[reeds-to-plexos]
        T2[reeds-to-sienna]
        T3[plexos-to-sienna]
        T4[sienna-to-plexos]
    end

    subgraph "Exporters"
        EP[plexos]
        ES[sienna-exporter]
    end

    CLI --> RP & PP & SP
    CLI --> TR
    CLI --> T1 & T2 & T3 & T4
    CLI --> EP & ES

Loading

The CLI runs any package that registers plugins via the r2x_plugin entry point. It discovers them with r2x list and re-scans with r2x sync.

A typical pipeline flows through three stages:

1. Parse — a parser plugin reads source data and produces an r2x_core.System (e.g. reeds-parser from r2x-reeds).
2. Translate — a translation plugin (this repo) applies JSON rules that map source components to target components, with @getter functions for computed fields.
3. Export — an exporter plugin writes the translated System to the output format (e.g. plexos from r2x-plexos).

Transform plugins (like add-ccs-credit or break-gens from r2x-reeds) can be inserted anywhere in the pipeline to modify a system in place.

Translation Plugins

Package	Direction	Rules
r2x-reeds-to-plexos	ReEDS → PLEXOS	34
r2x-reeds-to-sienna	ReEDS → Sienna	—
r2x-plexos-to-sienna	PLEXOS → Sienna	21
r2x-sienna-to-plexos	Sienna → PLEXOS	44

Each plugin contains:

• translation.py — perform_translation(context) entry point
• config/rules.json — source → target component mappings
• getters.py — @getter-decorated functions for computed fields
• plugin.py — registers the plugin via PluginManifest

Example rule (ReEDS thermal generator → PLEXOS generator)

{
  "source_type": "ReEDSThermalGenerator",
  "target_type": "PLEXOSGenerator",
  "version": 1,
  "field_map": {
    "name": "name",
    "max_capacity": "capacity",
    "fuel_price": "fuel_price",
    "heat_rate": "heat_rate"
  },
  "getters": {
    "units": "get_component_units",
    "commit": "get_commitment_status",
    "forced_outage_rate": "forced_outage_rate_percent"
  },
  "defaults": {
    "category": "thermal",
    "start_cost": 0.0
  }
}

Ecosystem

The r2x ecosystem is a set of independently published packages. The CLI orchestrates them; r2x-core provides the shared plugin framework; model packages supply parsers, exporters, and data models; and this repo provides translation plugins.

Package	Description
r2x-cli	Rust CLI that discovers, installs, and runs any r2x plugin. Chains plugins into pipelines and manages Python environments
r2x-core	Shared plugin framework: PluginContext, Rule, System, @getter registry, Result[T, E] via rust-ok
r2x-reeds	ReEDS parser, transform plugins (add-ccs-credit, break-gens, etc.), and component models
r2x-plexos	PLEXOS parser/exporter and component models, built on plexosdb
r2x-sienna	Sienna parser/exporter and PowerSystems.jl-compatible models
infrasys	Foundational System container, time series management, and component storage used by all model packages
plexosdb	Standalone PLEXOS XML database reader/writer

Model Compatibility

R2X Version	Supported Inputs	Supported Outputs
2.0	ReEDS (v2024.8.0)	PLEXOS (9.0, 9.2, 10, 11)
	Sienna (PSY 4.0)	Sienna (PSY 4.0, 5.0)
	PLEXOS (9.0, 9.2, 10, 11)

Documentation

Full docs, API reference, and how-to guides: natlabrockies.github.io/R2X

Roadmap

• Active issues: Currently in progress.
• Prioritized backlog: Up next.
• Nice-to-have: Community contributions welcome.
• Ideas: Future directions for R2X.

Contributing

Contributions are welcome! See the documentation for coding standards and PR guidelines.

git clone https://github.com/NatlabRockies/R2X.git
cd R2X
uv sync --dev
uv run pytest

License

R2X is released under the BSD 3-Clause License.

Developed under software record SWR-24-91 at the National Renewable Energy Laboratory (NREL).