Data-Driven PPA Risk Management

PPA Source Specifics

Power Purchase Agreement
Oversight and Risk Management

Individual Treatment

Each generation source requires unique oversight due to:

Differences in variability
and load service role
Regulation
Fundamental mechanics (turbines, panel tracking)
Site specific considerations (terrain, weather)
Seasonal impacts on Capacity Factor
Cost

ASCE provides the expertise to understand the nuances of each source, and provide early warning when projects have issues. This helps avoid disputes by catching issues early, and supports speedy and data-backed resolution should disputes arise.

We work with counterparties to review single line diagrams for each plant. We then determine the viability and reliability of data sources and note this for future consideration within our systems.

Hybrid Plants

Renewables projects of the near future are hybrid plants, coupling one source with another, often storage. A limited number of plants are hybrid today. We have experience with hybrid plants and their unique considerations.

Oversight of hybrid plants is more complex because of challenges the mix of gen sources presents. Are you ever sold storage due to grid arbitrage by the operator? With this additional gen source how often does output exceed nameplate or PPA Max? Does the operator exceed tie line constraint or contractual agreement? Does the PPA allow any of this? Does this risk future carbon credit viability?

Geothermal

We work with more than 10% of US geothermal plants. Geothermal is a unique base load resource, with high aux use, drawdown considerations, and extreme seasonal and ambient variance that impacts the value of a PPA. ASCE will work with you to implement metrics around your geothermal resources, to show how geothermal behaves within your portfolio.

Solar

Our platform shows changes in plant output when solar is coupled with storage, and catches dips that indicate panel tracking issues. See curtailment management for more information.

Wind

There's much more to wind than seasonal variance. Each year is unique, with YOY variance that impacts planning. The possibility of shortfalls in production is a key driver when assuring full-year min PPA MWh are met.

Using proprietary algorithms we show wind speed to MW on an ongoing basis. This insight gives a visual representation of when operations are on track, or turbines are offline unexpectedly.

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