Stranded Generation
- Page status
- Working page
- Updated
- 2026-07-10
Summary
Stranded generation is the condition where a power plant could produce, but the grid cannot absorb or move its electricity—so water is spilled, output is reduced or a dispatch instruction stops generation. In Nepal, the mechanism is plausible in a run-of-river system with constrained transmission and export paths, but the public source corpus does not provide a national, plant-level curtailment series to measure its scale.
Simple Explanation
Nepal can add hydropower faster than the lines, substations, domestic demand and cross-border access needed to use it. During high-flow periods, that can leave available generation without an outlet. A low annual generation figure alone is not proof of curtailment: it can also reflect hydrology, maintenance, forced outage, transmission failure or plant availability.
What the Current Evidence Establishes
During wet-season peaks, run-of-river output, domestic demand, export access and internal transmission capacity can diverge (see Seasonal Mismatch). The NEA annual report is an essential system snapshot, but it does not publish the plant-by-plant available energy, dispatch instruction, rejected MWh or reason code needed to quantify national curtailment.
As checked on 10 July 2026, NEA's Generation Directorate public
operational-report page was marked Coming soon, while its Transmission
Directorate published daily aggregate system reports. Neither public
surface supplies the plant-level availability and dispatch-event fields
needed for a curtailment series. See
NEA Operational-Reporting Portals (2026).
The Likhu cascade is the best-documented corridor case in the current corpus. A research compilation attributes Likhu-2's FY 2023/24 underperformance to the New Khimti transformer constraint and records improved performance after an upgrade. This is useful evidence of a specific bottleneck mechanism, not a national curtailment rate or a representative sample. See Buildability for the delivery-risk context.
The public evidence supports a transmission-and-market risk, not a precise current daily spill figure. Installed capacity, exports and annual sales cannot be subtracted from one another to obtain curtailment, because they use different time bases and omit hydrology, availability, imports, storage, losses and dispatch constraints.
Contract Exposure Is Distinct From Observed Losses
Secondary analysis of standard NEA PPA clauses identifies a possible contractual exposure where dispatch curtailment is not treated as a compensable deemed-generation event. It does not provide a signed-PPA corpus, a dispatch-order log or adjudicated outcomes. The effect on individual IPPs therefore remains a question for contract and plant-level evidence, rather than a fact established by the current page.
Minimum Disclosure Needed to Measure the Problem
An auditable monthly public dataset should publish, for each generator or an appropriately anonymised cohort:
| Field | Why it is required |
|---|---|
| Available generation (MWh) and actual accepted generation (MWh) | Separates physical availability from accepted output |
| Curtailment MWh and timestamp | Makes the amount and system period measurable |
| Reason code | Distinguishes transmission, system-security, market, maintenance and hydrology causes |
| Affected transmission node/corridor | Connects a loss to an investment or operating constraint |
| Dispatch instruction and restoration time | Establishes whether curtailment was ordered and for how long |
| Contractual treatment and compensation status | Separates physical curtailment from the resulting financial loss |
Until that data exists, project-level reports should be labelled as individual research leads, not combined into a national total. This is the highest-priority operational-data request in Unresolved Questions.
Common Misunderstandings
- "Stranded generation means plants are broken." It may instead be a grid, market or dispatch constraint; the reason must be observed.
- "More generation automatically solves supply needs." Generation without transmission, demand and usable market access can increase the risk of unavailable output in particular hours or seasons.
- "Annual energy reveals curtailment." It cannot do so without an availability baseline and dispatch-cause data.
Analytical Links
Stranded energy is the physical mirror of Seasonal Arbitrage Trap: surplus energy without priced scarcity, dispatchable demand or firm export paths does not necessarily become useful electricity. The institutional counterpart is whether Nepal Electricity Authority (NEA) and regulators can align incentives so that installed MW stops diverging from delivered MWh.