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The motorway of the gas system — the high-pressure pipelines and compressor stations that move bulk gas from entry points to power, industry and the city gates. A regulated or contracted monopoly that earns a return on its asset base, decoupled from how much gas flows. Pick a real network below and follow it through the pipeline, the model and a working returns model.
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Drag the sliders to see what earns the revenue — the asset base and the allowed return, not how much gas flows.
A gas transmission network is a natural monopoly, so it doesn't charge a market price — its revenue is either set by a regulator on a Regulated Asset Base or fixed by long-term capacity contracts. Either way the building blocks are the same: a return on the asset base at an allowed/agreed cost of capital; recovery of depreciation; an opex allowance; and incentives. Capacity is booked ship-or-pay / take-or-pay, so the revenue is decoupled from how much gas flows — and the asset base is inflation-protected and grows with capex (security of supply, hydrogen repurposing).
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See also the standalone gas transmission (RAB) simulation and the Cash-flow & DCF model.