OP OPUC C HO HOSTING ING CAP APACI ACITY TY OV OVERVIEW ERVIEW MA MAY 6, 2020 20
BACKGROUND ON KEVALA San Francisco based data and analytics firm founded in 2014 Provides data & analytics services to utilities, regulators, IPPs, & mobility sector Services include: Non-Wires Alternatives and DER valuation analysis Hosting capacity and interconnection optimization DER and EV grid impact analysis 2
HOSTING CAPACITY OVERVIEW The first rule of hosting capacity is that there are no rules about hosting capacity. (or at least there is no single “right way” to do it.) Every implementation is unique and the best practices are continuously evolving. Hosting capacity doesn’t have to mean “solar hosting capacity” 3
EXAMPLE HOSTING CAPACITY DEFINITIONS “Amount of PV generation that can interconnect w/o violating power quality criteria (regardless of location).” (HECO) “Amount of DER that can be accommodated anywhere without adversely impacting power quality or reliability under current configurations and without requiring infrastructure upgrades” (EPRI) “How much DER hosting capacity may be available on the distribution network down to the line section or node level with no significant upgrades” (PG&E) 4
GRANULARITY OF HOSTING CAPACITY VALUES Geographic Circuit vs. line segment Primary vs. secondary Temporal Peak vs. Hourly Refresh rate Annual Daily 5
USERS OF HOSTING CAPACITY ANALYSIS Utility interconnection engineers Streamlined interconnection study process Independent Power Producers Circuits to target for utility scale development Retail customers Speed and cost/feasibility of getting solar Solar installers and financers Where to focus marketing efforts 6
HOSTING CAPACITY VARIABILITY EXAMPLE 7
HOSTING CAPACITY VARIABILITY EXAMPLE 8
HOSTING CAPACITY VARIABILITY EXAMPLE 9
FACTORS THAT GENERALLY AFFECT HOSTING CAPACITY (AKA things that cause Thermal, Voltage, Protection, and Power quality violations) Importance Radial vs. Load and Grounding Short circuit Feeder length Nominal Circuit mesh other and line strength voltage protection network generation geometry location topography 1 0
EXAMPLES OF HOSTING CAPACITY EFFICIENCIES Creating simple, data driven estimates of load, generation, and interconnection costs can produce nearly instantaneous estimates of when and where violations are likely to occur without full interconnection studies or power flow analysis. 1 1
POTENTIAL WORKING DEFINITION HOSTING CAPACITY “A quantification of the likely costs and time requirements for interconnecting a specified amount and type of DER at a given location on the grid in the absence of the ability to otherwise provide that information instantaneously and at no cost to the requestor.” Potentially a signal for where interconnection costs and/or delays can be minimized if a resource modifies its probable behavior in specified ways. 1 2
KEY TAKEAWAYS A hosting capacity analysis should be designed to reduce the burden on both utilities and developers. Hosting capacity analysis should aspire to instantaneously and at negligible cost replicate the outcomes of interconnection studies until such a time that interconnection studies can be performed instantaneously and at negligible cost. 1 3
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