Abstract
With rapid declines in solar photovoltaic (PV) and energy storage costs, futures with PV penetrations approaching or exceeding 50% of total annual US generation are becoming conceivable. The operational merits of such a national-scale system have not been evaluated sufficiently. Here, we analyze in detail the operational impacts of a future US power system with very high annual levels of PV (>50%) with storage. We show that load and operating reserve requirements can be met for all hours while considering key generator operational constraints. Storage plays an active role in maintaining the balance of supply and demand during sunset hours. Under the highest PV penetration scenario, hours with >90% PV penetration are relatively common, which require rapid transitions between predominately conventional synchronous generation and mostly inverter-based generation. We observe hours with almost 400 GW (over 40%) of economic curtailment and frequent (up to 36%) hours with very low energy prices.
Original language | American English |
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Pages (from-to) | 436-447 |
Number of pages | 12 |
Journal | iScience |
Volume | 21 |
DOIs | |
State | Published - 22 Nov 2019 |
Bibliographical note
Publisher Copyright:© 2019 The Author(s)
NREL Publication Number
- NREL/JA-6A20-71948
Keywords
- curtailment
- energy prices
- energy storage
- net load
- photovoltaic generation
- production cost modeling
- ramping
- renewables
- solar energy
- thermal cycling