Hosting Capacity Approach Implications
This paper revisits the generation hosting capacity (HC) calculation approach to account for grid operational flexibility--the ability to reconfigure the system safely. In essence, the generation hosting capacity is determined against the set of limiting factors--voltage, thermal (conductor loading)...
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Zusammenfassung: | This paper revisits the generation hosting capacity (HC) calculation approach
to account for grid operational flexibility--the ability to reconfigure the
system safely. In essence, the generation hosting capacity is determined
against the set of limiting factors--voltage, thermal (conductor loading),
reverse flow (at the feeder head, station transformer, or substation), and
change in the voltage (due to sudden change in generation output)). Not that
long ago, California Investor-Owned Utilities (IOUs) added a new criterion that
does not allow reverse flow at the supervisory control and data acquisition
(SCADA) points that can change the system configuration, aiming to prevent the
potential transfer of reverse flow to an adjacent feeder. This new criterion
intended to capture operational constraints as part of hosting capacity-known
as hosting capacity with operational flexibility (OpFlex). This paper explores
the shortfalls of such an approach and proposes performing actual transfer
analysis when determining hosting capacity rather than implementing the OpFlex
approach. Furthermore, we discuss the need for transition to determining
hosting capacity profile (all intervals) rather than a flat line (one, worst
performing interval) hosting capacity. A hosting capacity profile would inform
the developers of interval-by-interval limits and opportunities, creating new
opportunities to reach higher penetration of DERs at a lower cost. With
technological and computational advancements, such an approach is neither out
of implementation reach nor that computationally expensive. In return, far more
DER can be interconnected once programmed not to violate certain generation
profiles as part of the interconnection requirement, and utilities would be
better informed of their actual operational flexibility, benefiting society
overall. |
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DOI: | 10.48550/arxiv.2110.10551 |