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Connections

Connections define how power flows between elements in your network.

Overview

A connection represents a power flow path from a source element to a target element, with optional power limits.

Configuration

Source

The element where power comes from.

Target

The element where power goes to.

Min Power (Optional)

Minimum power flow (kW). Can be negative for bidirectional flow.

Max Power (Optional)

Maximum power flow (kW).

Examples

Bidirectional Connection

Grid ↔ Battery:

Source: Grid
Target: Battery
Min Power: -10 kW # Can flow either direction
Max Power: 10 kW

Unidirectional Connection

Solar → Net:

Source: Solar
Target: Net
Min Power: 0 kW # One-way only
Max Power: None # Unlimited

Network Topology

graph LR
    Grid[Grid] <-->|±10kW| Net[Net]
    Battery[Battery] <-->|±5kW| Net
    Solar[Solar] -->|→| Net
    Net -->|→| Load[Load]

Troubleshooting

See troubleshooting guide for connection issues.

Modeling Hybrid Inverters

Hybrid inverters (AC-DC converters) can be modeled as connections between nodes:

graph LR
    subgraph DC Side
        Battery[Battery] --> DC_Net[DC Net]
        Solar[Solar] --> DC_Net
    end

    subgraph AC Side
        Grid[Grid] <--> AC_Net[AC Net]
        AC_Net --> Load[Load]
    end

    DC_Net <-->|Inverter<br/>Connection| AC_Net

Configuration

Create two net nodes (DC and AC) and connect them with power limits:

Source: DC Net
Target: AC Net
Min Power: -5 kW # 5kW charging (AC→DC)
Max Power: 5 kW # 5kW discharging (DC→AC)

The connection limits represent the inverter's power rating.

Power Limits: Elements vs Connections

  • Element limits (battery charge/discharge rates) represent device capabilities.
  • Connection limits (inverter ratings) represent power flow constraints.

Both are respected during optimization.

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