Feature request: also show generation/load per Node - and Load Flow per HV Line section

[MaykThewessen]

is there a more recent alternative GUI / interface / Dashboard / analysis tool for finished PyPSA runs?

The PyPSA-App already provides a strong basis for exploring PyPSA networks, but it is currently difficult to understand what is physically happening at the node and line level.

I would like to request functionality to display generation, load, and power flow per node and per HV line section in the web UI.

1. Node-level balances
   For each bus/node, show:
   • Total generation (MW)
   • Total load (MW)
   • Net injection (generation − load)
   • Optional: storage charge/discharge
   • Optional: curtailed generation

This should be visible:
• In the node tooltip
• In a side panel when clicking a node
• As a color scale on the map (e.g. net injection/export vs import)

This makes it possible to immediately see:
• Which nodes are exporters vs importers
• Where congestion and balancing stress arises
• Whether local generation is actually serving local demand

2. HV line / link load flow
   For each transmission line or link:
   • Actual power flow (MW)
   • % of thermal limit
   • Direction of flow

This should be visualized:
• As line thickness (MW)
• As color (loading %, or congestion)
• With arrows for flow direction
• With detailed values on hover / click

This is essential for:
• Congestion analysis
• Grid reinforcement studies
• BESS placement and curtailment diagnostics
• Understanding dispatch results

3. Time-step support
   These metrics should update when:
   • The user changes the selected snapshot
   • Or scrubs through time

So the app becomes a true grid playback & diagnosis tool, not just a static network viewer.

Why this matters
Without node-level balances and line-level flows, PyPSA-App is mainly a topology viewer.
With these features, it becomes a proper power system analysis cockpit, suitable for:
• Market & dispatch debugging
• Congestion analysis
• Storage & grid expansion planning
• Education and stakeholder communication

This would be a major step toward turning PyPSA-App into a serious operational and planning frontend for PyPSA models.