Transcript Hosting Capacity - The Joint Utilities of New York

Distribution System Planning Engagement Group
August 18, 2016
Summary of Stakeholder Engagement Group Meetings
Hosting Capacity
1
Distribution System Planning Engagement Group Charter
(updated draft 05/23/2016)
Purpose: Explore common ground in approaches regarding the evolution in planning the distribution system in
New York as Distributed Energy Resource (DER) penetration increases and as the market evolves, in order meet
customers’ needs and public policy goals. Will include a uniform methodology for calculating hosting capacity
and to increase hosting capability, a move toward probabilistic planning, a plan for optimization improvements
that will result in a more efficient interconnection process.
Topics and Scope: Suitability Criteria for Non-Wires Alternatives (NWAs); Hosting Capacity
Suitability Criteria for Non-Wires Alternatives
Hosting Capacity
• Determine a set of appropriate criteria for project
applicability including risk and design standards
• Discuss methodological approaches and data inputs for
determining hosting capacity, and which are
appropriate for which systems in New York.
• Discuss which types of needs (examples: load relief,
reliability) can best be met through NWA solutions,
and which may present less opportunity for DER-led
solutions.
o Understand the what and why of grid needs
o Describe how these factors, project
characteristics and timelines to completion affect
NWA suitability.
• Explore the dimensions of projects, including
traditional and alternative cost and fit parameters,
and whether there are threshold levels that indicate
NWA suitability.
o Describe how these answers differ for radial and
network systems.
o Discuss the potential evolution of methodology in
terms of modeling and data requirements, the
outputs that can be derived from the analysis, and
the uses of those outputs.
• Review different models and approaches to calculate
and publish hosting capacity
• Discuss potential solutions to increasing hosting
capacity (e.g. storage)
• Develop timeline to implement.
2
Hosting Capacity Schedule
7/11
7/18
7/25
8/1
Distribution System Planning
Webinar 7/27 on NWA
Suitability and System Data
Hosting
Capacity
7/14 Initial
Meeting
7/21 Webinar
7/28
Face to Face
Albany
8/4
Phone / Webinar
8/8
8/15
8/18
Stakeholder Engagement
8/11
Final Face-to-Face
Invitation-only
Roundtable 7/29
3
Hosting Capacity
Presentations on hosting capacity received from:
•
•
•
•
•
•
•
Advanced Microgrid Solutions
Borrego Solar
Enbala
EPRI
IREC
NY-BEST
Smarter Grid Solutions
4
Hosting Capacity Stakeholder Discussion
Develop an understanding of:
• Who will utilize hosting capacity information and how
the information will be applied
• For planning
• For facilitating construction of DERs
• What hosting capacity data is needed
• Inputs: Utility data – metering data, asset
information, etc.
• Outputs: Data and format to be published for
developers
• Near term vs. longer term requirements (Roadmap)
• How often information requires updating
• Considerations for increasing hosting capacity
• innovative solutions include smart inverters, storage,
analytics, and bilateral arrangements
5
Scope of Hosting Capacity
Interconnection Policy
Working Group
(IPWG) and
Ombudsman Group
“Near Term Policy and
Process Issues”
Hosting Capacity
Supplemental DSIP
“Hosting Capacity:
Definition, Use Cases,
and Expansion”
•
Queue management
• Common definition and roadmap
•
Dispute resolution
• Methodologies to increase
hosting capacity
•
Cost/cost allocations
Interconnection
Technical Working
Group (ITWG)
“Near-Term Technical
Issues”
• Transparency and consistency
related to utility system upgrades
• Technical whitepapers and
matrix
• Developer and utility use cases
•
Process issues within the
Standardized Interconnection
Requirements (SIR)
• Technical issues within the
Standardized Interconnection
Requirements (SIR)
• In-depth Engineering studies
6
Hosting Capacity Themes
• Continue to develop interconnection process (out of scope for Distribution
Planning)
• Continue to improve tools that communicate hosting capacity
• Expand capabilities to increase hosting capacity as experience is gained and
technology evolves
• Develop timeline and roadmap
7
Hosting Capacity Implementation Roadmap
*Efforts to increase hosting capacity completed in parallel
with Hosting Capacity Evaluations
Stage 1 –
Distribution
Indicators
Stage 2 –
Hosting
Capacity
Evaluations
Stage 3 –
Advanced
Hosting
Capacity
Evaluations
Stage 4 – Fully
Integrated DER
Value
Assessments
Increasing effectiveness, complexity, and data requirements
8
Defining a Roadmap for
Successful
Implementation of a
Hosting Capacity
Method for NY
Jeff Smith, Manager
Power System Studies,
[email protected]
Lindsey Rogers, Technical Lead
Distributed Renewables
[email protected]
Joint Utility Workshop, Distribution System Planning
– Hosting Capacity
Thursday, August 18, 2016
Defining a Roadmap for Successful
Implementation of a Hosting Capacity
Method for New York State, EPRI, Palo
Alto, CA: 2016. 3002008848
© 2016 Electric Power Research Institute, Inc. All rights reserved.
What is Hosting Capacity and Why is it So Important?
 Definition:
– Hosting Capacity is the amount of DER that can be accommodated
without adversely impacting power quality or reliability under current
configurations and without requiring infrastructure upgrades.
 Hosting Capacity is
– Location dependent
– Feeder-specific
– Time-varying
Hosting Capacity can be used to inform
utility interconnection processes and to
support DG developer understanding of
more favorable locations for interconnection
 Hosting capacity considers DER interconnection without allowing
–
–
–
–
Voltage/flicker violations
Protection mis-operation
Thermal overloads
Decreased safety/reliability/power quality
 Hosting capacity evaluations require precise models of entire
distribution system
A feeder’s hosting capacity is not a single value, but a range of values
10
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Comprehensive Criteria for Hosting Capacity Evaluations
Power System
Criteria
Thermal
Power
Quality/Voltage
Protection
Reliability/Safety
Substation
transformer
Sudden (fast)
voltage change
Relay reduction
of reach
Unintentional
islanding
Primary
conductor
Steady-state
voltage
Sympathetic
tripping
Operational
flexibility
Service
Transformer
Line regulator or
substation LTC
Element fault
current
Secondary
Conductor
Capacitor
switching
Reverse power
flow (backfeed)
11
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Detailed Implementation of Hosting Capacity Assessments
Method Overview
 Select specific locations for DER
– Accurate
– Time-consuming/data intensive
– Applicable to specific scenarios
 “Iterate” through each case
 Solve 1000’s of load flows
 Difficult to consider range of possible DER
scenarios
Run power flow
– All locations (three-phase and single-phase)
– Feeder reconfigurations
– DER types
Add DER
N
Findings
 Results similar to detailed impact studies
Criteria
violated?
Y
Hosting Capacity
Voltage
Protection
Power Quality
Thermal
 Not easily replicable across entire system
– Typically have to limit the
cases/locations/scenarios considered
– Can take hours to days to simulate a single
feeder depending upon feeder complexity
Analysis of High-Penetration Solar PV Impacts for Distribution
Planning: Stochastic and Time-Series Methods for Determining
Feeder Hosting Capacity. EPRI, Palo Alto, CA: 2012. 1026640
12
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Challenge: Distribution Area-Wide Models are “Immense”
in Scale
Typical
Distribution
Utility
Count
Distribution
Service Territory
1
Distribution
Planning Area
1’s - 10’s
Distribution
Substations
10’s - 100’s
Distribution
Feeders
100’s -1000’s
Distribution
Transformers
1000s - 1,000,000’s
Distribution
Customers
100,000’s - 1,000,000’s
Distribution diagrams courtesy of Salt River Project
13
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Key Components of an Effective Hosting Capacity
Method
Granular
Repeatable
Scalable
Transparent
Proven
Available
• Capture unique feeder-specific responses
• As distribution system changes
• System-wide assessment
• Clear and open methods of analysis
• Validated techniques
• Using existing planning tools and readily available data
14
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Streamlined Implementation of Hosting Capacity Assessments
Method Overview
 Solve base load flow/shortcircuit cases
 Increase DER at each location
on feeder
 Apply advanced algorithms to
calculate hosting capacity at
each location
Findings
 Close approximation of DER impact
– Less time/data intensive
– Not a replacement for detailed studies
 Full range of possible DER scenarios
can be considered
DER Capacity
Baseline Power flow/short-circuit
Select DER location
Substation
– All locations (three-phase and singlephase), feeder configurations, DER
DER Location
technologies and types (centralized vs
distributed)
 Easily replicable across entire system
– Typically 3-5 minutes per feeder when
automated
Centralized DER
Increase DER
DER Location
Y
Hosting
Capacity
Limit?
DER Capacity
Apply Power System Criteria
N
Substation
Distributed DER
Integration of Hosting Capacity Analysis into Distribution
Planning Tools. EPRI, Palo Alto, CA: 2016. 3002005793
15
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Example Case Study
• Hosting capacity is calculated on
each feeder node
• Evaluations consider
- Local constraints
- Upstream constraints
Substation
Substation LTC: 123V
Modeling data and
assumptions have
impact on hosting
capacity
Substation LTC: 125V
*Illustration of DER (PV) hosting capacity based on evaluating overvoltage
16
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Distribution Modeling Requirements for Hosting Capacity
Evaluations
Model Depth – Individual Feeder
Requirements
Model Breadth - Distribution
models of entire service territory
 Medium-voltage assets modeled
 Peak-load models represented
(current capability for most
utilities)
 Off-peak models of distribution
system
 All feeders/network systems
modeled
– Typically not available, requires
additional considerations
All feeders modeled:
Sufficient breadth and depth
Desired
State
Depth
Increasing granularity
– To consider different times of
day/load levels
Few feeder models: highly detailed
for demonstration projects
No feeder
models
Distribution Modeling Guidelines: Executive Summary - Recommendations for
System and Asset Modeling for Distributed Energy Resource Assessments,
EPRI, Palo Alto, CA: 2015. 3002008894.
17
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Portion of feeders
modeled: sufficient for
traditional planning
Most feeders modeled:
sufficient for traditional planning
Breadth
Increasing number of feeders
Additional Considerations for Hosting Capacity
Implementation
Hosting Capacity on Meshed LowVoltage Systems
Existing DER and Interconnection
Queue
 Differs from radial modeling and
analysis
 Should consider existing DER
 No extensive studies exist to
represent impacts
 Must model to low voltage assets
 Requires significant amount of data
upkeep
 Modeling of existing and approved
DER required
Williamsburg Network
CHP
DR
PV
Network Grid
DR
DR
18
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Tools for Hosting Capacity Analysis
Implementing hosting capacity methods using existing planning tools
 Required capabilities reside within
existing planning tools
– Distribution models
– Analysis mechanics (load flow, shortcircuit)
Incorporating hosting capacity
methods into existing utility planning
tools – no need to re-invent the
wheel
 Alleviates unnecessary model
translation to other software platforms
Existing
Distribution
Planning Tools
– Improving data management/upkeep
efficiency
– Captures changes in distribution system
 One platform for all planning functions
and models
(CYME, Milsoft,
Synergi, DEW)
– Traditional distribution planning
– Hosting capacity evaluations
– Grid modernization assessments
 EPRI and it’s utility members are
working with major software vendors to
incorporate hosting capacity method
(CYME: 2016, Milsoft/Synergi: 2016/17)
Hosting Capacity
Module
19
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Methods for Increasing Distribution Hosting Capacity
 Methods for increasing hosting capacity
depend upon many factors
– Limiting power system criteria
– Distribution system design and operating
characteristics
– DER capabilities
 A single solution/technology does not resolve
all issues
 Grid-Side Enhancements/Changes
–
–
–
–
–
–
–
Reconductoring
Voltage uprating
Transformer replacement
Additional voltage regulator
Comm/control (curtailment)
Additional relaying
Storage
 Operational Changes
– Voltage
– Thermal
– Protection
 Solutions can be situation-specific
– E.g., smart inverters and reconductoring can help
with voltage issues but not protection
 Solutions for increasing hosting capacity can
have other benefits as well
– Reconductoring and voltage uprating can reduce
losses and increase load-serving capability
– Comm/control of DER coordinated with existing
controls can help regulate voltage
– Voltage regulation changes (LTC
setpoint adjustment, etc.)
– Relay setting modification
 Technology Solutions
–
–
–
–
–
20
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Smart inverters
Distributed var control
Energy storage
PV panel orientation
DSM
Summary
 Hosting capacity is a complex analysis
requiring models of entire distribution
area
– Most utilities have modeled a portion of
the system – still work to be done
– Distribution metering data must be
more granular
 Roadmap to implementation
– Provides staged approach for
development
– Delivers near and long-term solutions
– Allows for refinement of models and
methods over time
– Leverages EPRI work regarding use of
existing planning tools for hosting
capacity assessments
Defining a Roadmap for Successful Implementation of
a Hosting Capacity Method for New York State, EPRI,
Palo Alto, CA: 2016. 3002008848
21
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Additional References
Detailed Hosting Capacity Method
 Impact of High-Penetration PV on Distribution System Performance: Example Cases and Analysis Approach. EPRI, Palo Alto,
CA: 2011. 1021982
 Analysis of High-Penetration Solar PV Impacts for Distribution Planning: Stochastic and Time-Series Methods for Determining
Feeder Hosting Capacity. EPRI, Palo Alto, CA: 2012. 1026640
 Rylander, M., Smith, J., “Comprehensive Approach for Determining Distribution Network Hosting Capacity for Solar PV”, 2nd
International Workshop on Integration of Solar Power Into Power Systems, Lisbon, Portugal, Nov 2012.
 Rylander, M., Smith, J., "Stochastic Approach for Distribution Planning with Distributed Energy Resources", 2012 CIGRE Grid of
the Future Symposium, Kansas City, MO, 2012
 Rylander, M., Smith, J., "Comprehensive Approach for Determining Distribution Network Hosting Capacity for Solar PV", 2nd
International Workshop on Integration of Solar Power Into Distribution Systems, 12-13 November, 2012
 Distributed Photovoltaic Feeder Analysis: Preliminary Findings from Hosting Capacity Analysis of 18 Distribution Feeders. EPRI,
Palo Alto, CA: 2013. 3002001245.
 Alternatives to the 15% Rule: Modeling and Hosting Capacity Analysis of 16 Feeders. EPRI, Palo Alto, CA: 2015. 3002005812.
Streamlined Hosting Capacity Method
 Integration of Hosting Capacity Analysis into Distribution Planning Tools. EPRI, Palo Alto, CA: 2016. 3002005793
 A New Method for Characterizing Distribution System Hosting Capacity for Distributed Energy Resources: A Streamlined
Approach for Solar Photovoltaics. EPRI, Palo Alto, CA: 2014. 3002003278.
 Rylander, M., Smith, J., Sunderman, W., “Streamlined Method For Determining Distribution System Hosting Capacity”, 23 rd
International Conference on Electricity Distribution, CIRED, Lyon, France, 2015
 Rylander, M., Smith, J., Sunderman, W., “Streamlined Method For Determining Distribution System Hosting Capacity”, Rural
Electric Power Conference, Asheville, NC, 2015 (accepted for IAS Transactions)
 Distribution Feeder Hosting Capacity: What Matters When Planning for DER?. EPRI, Palo Alto, CA: 2015. 3002004777
 Smith, J., Rylander, M., Rogers, L., Dugan, R., “It’s All in the Plans: Maximizing the Benefits and Minimizing the Impacts of
DERs in an Integrated Grid”, Power and Energy Magazine, March/April 2015.
22
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Hosting Capacity – What We’ve Heard
Top priorities to focus on in the immediate term
• Identify the outputs that are required and how they will be used
• Develop Hosting Capacity indicator tools / maps
• Increase hosting capacity through the System Planning process
• Explore Hosting Capacity’s relationship with the Interconnection
process
• Identify a balance between time, costs, and accuracy of hosting
capacity assessment
Additional considerations
• Using hosting capacity as tool to identify where upgrades are needed
to relieve constraints
• Improve granularity and accuracy of the Hosting Capacity maps
• Understand what data is going to be shared regardless of methodology
• Full integration into the interconnection process
23
Hosting Capacity – What We’ve Heard
Timeline and Roadmap
•
•
•
•
•
Support for a evolutionary roadmap with early action to provide value; doesn’t need to be perfect
Clarify steps from the current state to a future state
Steps toward moving from the current state to future state should be clear
Don’t lose sight of the goal, in terms of both timeline and resources to implement
Ability to evolve to include additional technologies beyond solar PV
Distribution Indicators
• Utilities currently provide ‘red zone maps’ to help developers interconnect
• There may be opportunity to improve the consistency of these maps across utilities prior to Hosting
Capacity development
Hosting Capacity
• Common approach that leverages existing work
• Understanding best practices, both national and international
• Searchable maps are useful – both load based and generation based
• A Hosting Capacity map is an important complement to a ‘pre-application report’
Increasing Hosting Capacity
• There are technologies and processes that the group has reviewed that can help increase hosting capacity
• Policy goals are supported by increasing hosting capacity
24
Supplemental DSIP Topics
Topic Areas
Distribution System
Planning
Grid Operations
Market Operations
Interconnection
Hosting
Capacity
System Data
Monitoring &
Control
Granular
Pricing
Customer Data
Demand
Forecasting
NWA
Suitability
Cyber
Security
ISO/DSP Roles,
Responsibilities,
Interaction
DER Sourcing
- Procurement
Electric Vehicle
Supply
Equipment
DER Forecasting
Load Flow
Analysis
Topics
Probabilistic
Planning
Discussed in 7/27 Conference/Webinar
Discussed in 8/18 Conference/Webinar
To be discussed in 9/13 Conference/Webinar
DPS discussion topic
25
Appendix & Reference Materials
26
Reference Guide
Distribution Modeling Guidelines: Executive Summary - Recommendations for System and
Asset Modeling for Distributed Energy Resource Assessments. EPRI. Palo Alto, CA: 2016,
3002008894
http://www.epri.com/abstracts/Pages/ProductAbstract.aspx?ProductId=000000003002008
894
Whitepapers and stakeholder presentations located on the website
www.jointutilitiesofny.org and includes information from:
For more Information please access the Department of Public Service (DPS)
website of the New York State http://www3.dps.ny.gov/W/PSCWeb.nsf/All/DCF68EFCA391AD6085257687006F396B?O
penDocument
For more Information on the Red Zone Maps of Joint Utilities of New York,
please access the link below from the Department of Public Service (DPS)
website of the New York State –
http://www3.dps.ny.gov/W/PSCWeb.nsf/All/6143542BD0775DEC85257FF10056479C?O
penDocument
27
Please contact [email protected]
or
visit our website www.jointutilitiesofny.org for more information
Draft for Discussion Purposes Only
28