Overview and Status of Distributed Energy
Resources Policy DocketJay Griffin, Chief of Policy and Research
Hawaii Public Utilities CommissionAugust 4, 2015
1Hawaii Public Utilities Commission
2Hawaii Public Utilities Commission
Dr. James “Jay” Griffin is the Chief of Policy and Research at the Hawaii Public Utilities Commission. He leads the PUC’s team of researchers and economists that support Commission decision-making with energy policy research and analysis. Joining the PUC over two years ago through an intergovernmental agreement, Jay is on leave as a faculty member at the Hawaii Natural Energy Institute (HNEI) which is an independent research unit at the University of Hawaii supporting the state’s efforts to develop indigenous renewable energy sources and reduce dependence on imported fossil fuels. While at HNEI, Jay worked on the research team for several renewable grid integration studies and led a Department of Energy-funded smart grid demonstration project on Maui.
Jay Griffin
Chief of Policy and ResearchHawaii Public Utilities Commission
Hawaii – Becoming World Leader in Solar PV Adoption
Hawaii leads the nation in the penetration of residential rooftop solar PV systems and as a result, is at the forefront of the integration challenges associated with high solar PV penetration levels.
At the same time, Hawaii is on track by 2017 to become a world leader in the utilization of solar PV resources – both distributed and utility-scale – with installed solar PV capacity penetration levels exceeding 75% of typical daytime gross system loads likely on several island electric grids.
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Hawaii Electric Systems -- 4 Electric Utilities; 6 Separate Grids
Oʻahu
Molokaʻi
Maui
HawaiʻiLanaʻi
Kauai Island Utility Cooperative34 MW PV (12 MW in development)System Peak: 72 MWCustomers: 32,700
Hawaiian Electric283 MW PV / 100 MW Wind /69 MW WTESystem Peak: 1,144 MWCustomers: 300,000
Maui Electric Maui: 52MW PV / 72MW WindSystem Peak: Maui 190 MWLana’i: 1MW PVSystem Peak: Lana’i: 5 MWMoloka’i: 2 MW PVSystem Peak: Moloka’i: 5.5 MWCustomers: 68,000
Hawaii Electric Light52 MW PV / 30 MW Wind / 34 MW Geothermal / 16 MW HydroSystem Peak: 190 MWCustomers: 81,000 4
34%
15%
17%
47%
Hawaii’s Distributed Solar PV Growth has Pushed Interconnection and System Integration Boundaries
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2005 2006 2007 2008 2009 2010 2011 2012 2013 20140
50
100
150
200
250
300
350
400
1.8 2.4 4.7 1224
40
71
171
301
389
Hawaiian Electric Companies
Cum
ulati
ve In
stal
led
Capa
city
(MW
s)
PUBLIC UTILITIES COMMISSION 6
Growth of Distributed PV has Pushed Interconnection Boundaries
Source: Hawaiian Electric Co.
PUBLIC UTILITIES COMMISSION 7
Source: Hawaiian Electric Co.
• Over last 2 years utility has increased distribution circuit screen levels to interconnect additional PV
• Aggregate growth has raised system-level integration challenges
Growth of Distributed PV has Pushed Interconnection Boundaries
8Hawaii Public Utilities Commission
Hawaii’s High Renewable Grids are Encountering New Technical, Economic, and Policy Challenges First
Source: Maui Electric Co. “Renewable Watch”, August 1, 2015
60% Daytime Load supplied by
Wind and DG
9Hawaii Public Utilities Commission
CAISO @ 23% daytime loadsimilar to Oahu today
Maui, Hawaii Island, and Kauai regularly > 50%
w/ Oahu to follow soon
Hawaii’s High Renewable Grids are Encountering New Technical, Economic, and Policy Challenges First
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March 31 PUC Orders Address DER Interconnection and New Customer Options
Interconnection of Energy Storage Systems (Docket No. 2014-0130)
• Storage systems will be reviewed for safety and reliability• Resolution of further technical issues moved to DER docket
Distributed Energy Resources Policy Docket (Docket No. 2014-0192)
• Established to investigate technical, economic, and policy issues• Opening order highlighted 3 key objectives:
1) Clear interconnection backlog2) Enable DER market growth3) Create new DER market choices
• Included Staff Paper and Proposal• Continues work started by stakeholders in the Reliability Standards
Working Group (RSWG)Hawaii Public Utilities Commission
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Overview of Staff Report and Proposal
• Focused discussion and collaboration among parties will resolve high priority issues more quickly
• Document divided into 3 sections:1) Overview of Recent Trends in Hawaii Solar PV Market2) Near-Term Technical and Economic Challenges and Proposed
Solutions for the Evolution of Hawaii’s DER Market3) Proposed DER Policy Docket Issues and Work Scope
• Summarizes near-term integration challenges • Includes DER Advanced Technology Roadmap• Proposes work scope for near-term and mid-term solutions
Hawaii Public Utilities Commission
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Staff Paper Summarizes DER Priority Technical Challenges
Examples of Technical Integration Challenges
Steady State Operations Contingency Events
System-level
Over-generation and increasing variability in generation resulting in: Curtailment of other renewable
generation Frequency regulation and ramping
challenges for central generation
Behavior of aggregate DER fleet may exacerbate grid instability during emergencies: Need grid-supportive frequency
and voltage trip and ride through settings
Circuit-level
Over-generation resulting in: Approaching or exceeding
distribution system equipment capacity limitations
Behavior of DER systems during circuit-level contingencies may result in: Unintentional islanding Temporary load rejection
overvoltage
Hawaii Public Utilities Commission
Source: Table 2, Staff Report and Proposal, Docket No. 2014-0192, March 31, 2015
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Proposed Market Options to Address Integration Challenges
Hawaii Public Utilities Commission
CustomerDER Development
Options
CustomerSelf-Supply
Option
CustomerGrid-Supply
Option
Non-participant customers held harmless, or benefit, from both customer solar PV development options
Customer choice -- non-export option to serve customer energy requirements
Grid power supply – export option to supply wholesale energy
Source: Staff Report and Proposal, Docket No. 2014-0192, March 31, 2015
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Next Steps in DER Docket
• Phase 1: Collaborative process with focus on clearing interconnection backlog, enabling continued DER market growth, and creating new DER market choices
• Parties filed Final Statements of Position – June 29, 2015
• Resolution of Phase 1 issues and Phase 2 scope currently under Commission consideration
Hawaii Public Utilities Commission