Are there any forecasting software platforms that handle time-series forecasting for load and generation with interconnection constraints?

Yes. There are several forecasting platforms and energy-system software suites that can handle time-series forecasting for load and generation, and some can also model interconnection constraints or feed forecasts into constraint-aware dispatch/optimization workflows.

Categories to look at

1) Utility/ISO planning and EMS platforms

These often support:

• load forecasting
• renewable generation forecasting
• network or tie-line/interconnection constraints
• operational scheduling and dispatch

Examples:

• Siemens Spectrum Power
• GE Vernova GridOS / Energy Management System tools
• Hitachi Energy Network Manager
• OSI (Open Systems International) Monarch
• ABB/Hitachi energy management and market operation tools

These are usually not “forecasting-only” products; they combine forecasting with grid operations and constraint management.

2) Optimization and simulation tools with forecasting inputs

These are useful if you want to forecast load/gen and then optimize under interconnection limits:

• PLEXOS
• Energy Exemplar Aurora / PLEXOS ecosystem
• GE MAPS
• AURORA
• PSSE / PowerWorld / DIgSILENT PowerFactory for network studies, often paired with forecasting engines

They can incorporate forecasts and system constraints, though the forecasting itself may be external or module-based.

3) Cloud/data science platforms customized for power forecasting

These are flexible if you need a custom model that explicitly includes interconnection constraints:

• AWS Forecast + custom optimization layer
• Azure Machine Learning
• Databricks
• Google Vertex AI
• Dataiku
• H2O.ai

These platforms don’t usually “natively” understand interconnection constraints in the power-system sense, but you can build that logic into the pipeline.

4) Specialized renewable forecasting vendors

Some vendors focus on solar/wind/load forecasting and may integrate grid constraints through API/EMS connections:

• Vaisala
• The Weather Company / IBM weather-based forecasting solutions
• DTN
• Meteomatics
• Renewables.ninja-style analytic platforms
• Various wind/solar power forecast providers used by ISOs and utilities

Important distinction

If by “interconnection constraints” you mean:

• tie-line capacity
• POI export limits
• generator interconnection limits
• network congestion constraints

then many forecasting tools alone won’t fully handle those internally. Usually you need:

1. a forecasting engine, and
2. a network/dispatch optimization or power-flow model that enforces the constraints.

Best-fit choices depend on your use case

• Utility/ISO operations: EMS/SCADA/market tools like Siemens, GE, Hitachi, OSI
• Resource planning and market simulation: PLEXOS, Aurora, MAPS
• Custom forecasting + constraint-aware optimization: Python/R + ML platform + optimizer such as Gurobi/CPLEX/Pyomo
• Renewables-specific operational forecasting: Vaisala, DTN, Meteomatics, IBM weather-integrated solutions

If you want, I can also give you:

1. a shortlist by budget/company size,
2. a comparison table, or
3. a recommended architecture for load/gen forecasting with interconnection constraints.