Sustainability, Risk, and Reporting
Marginal emissions estimate the emissions from the generating resource that changes output because of an incremental change in load. It is useful for operational carbon decisions but more complex than average regional emissions factors.
Affected system is a neighboring or related electric system that may be impacted by a project even if it is not the direct interconnecting provider. Affected-system studies can add cost, timing, and uncertainty to large-load or generation projects.
Read definition →Reactive power supports electric and magnetic fields in AC systems and is typically measured in kVAR or MVAR. It does not perform useful work like kW, but it is essential for voltage control and can materially affect grid studies and power factor penalties.
Read definition →Power Usage Effectiveness is total data center facility energy divided by IT equipment energy. A PUE closer to 1.0 indicates less non-IT overhead, but comparisons require consistent boundaries, metering, climate context, utilization, and reporting periods.
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