2014 PV Distribution System Modeling Workshop: DG Screening Tool: Jean-Sebastien Lacroix, CYME

1© 2012 Eaton Corporation. All rights reserved.
CYME Distributed Generation Screening Tool
PV Distribution System Modeling Workshop
May 6th, 2013. Jean-Sébastien Lacroix ing./Eng.

Agenda
• Utility Context
• CYME DG Screening Tool
• Pre-Application
• Generator Interconnection Procedures (GIP)
• California Rule-21 (Fast Track)
• Federal Energy Regulatory Commission (FERC)
• DG Screening Tool Demo
• Conclusion

Utility Context
Renewables Energy Facts
• California Objective – 33% Renewables by 2020
• California Solar Initiative – 3 GW of PV by 2017
• Over 17 000 Solar Rooftops (130 MW)
• Over 1.5 GW for SDG&E
• More than 1000 PV interconnection applications in
California, Hawaii and New Jersey each month
Net Energy Metering Program
• Over 120,000 residential and non-residential accounts
enrolled in California's NEM program (< 1 MW)

Utility Context
Interconnection Procedures Standard
• In 1999, the California Public Utilities Commission
(CPUC) adopted the Rule 21 to increase the
efficiency of the review of small generation
interconnection. Revised in 2012
• In 2003, IEEE-1547 Standard for Interconnection of
Distributed Resources with Power Systems
• In 2005, FERC adopted small generation
interconnection procedures called the Small
Generator Interconnection Procedures (SGIP).

Utility Context
Interconnection Procedures Flow Example
• Step 1 – Pre-Application Report Request
• Step 2 – Pre-Application Report
• Step 3 – Interconnection Request Process
Study Process - Fast Track
Non Exporting/Net Energy Metered
Exporting < 3 MW on a 12kV system
Detailed Study Process
Large impact on grid is anticipated
Projects that have failed in Fast Track
• Step 4 – Application Review & Initial Review
• Step 5 – Supplemental Review & Detail Interconnection Study
• Step 6 – Generating Facility Interconnection Agreement
• Step 7 – Execution of the Generator Inter. Agreement

Utility Context
Proposed IT Solution
• New Window Desktop Application
• Dashboard-type interface
• Manages and assesses various DG interconnection
requests
• Three Types of Screening
Pre-Application
Initial Screening – California Rule 21
Initial Screening – FERC
• Connected to CYME DB and enterprise DB

© 2013 Eaton Corporation. All rights reserved.
CYME DG Screening Tool

© 2013 Eaton, All Rights Reserved.
CYME Products and Services Overview
Best-in-Class System Analysis Tools and Services From Transmission to Distribution to Industrial
Power Engineering
Software
Integration Projects and Solutions Operations Solutions
Decision Support
for Network
Planning Analysis Engineering Consulting Services
Decision Support
for Real-Time
Applications
State Estimator
DG Impacts
Reliability
Harmonics
Volt/PF optimization
CYME Power System Analysis
Distribution
Transmission
Industrial
CYMCAP Cables
CYMTCC Protection
CYMGRD Substation Grounding
web
Utility
.
CYME
Network Model
DMS
Volt/Var Control
Feeder
Automation
Studies & Services
CYME Gateway
CYME Server
GIS
SCADA
OMS
AMI

NEW
CYME DG
Screening Tool
CYME
CYME
DG Screening
Database
DGSimulation
Study
Distribution Engineer’s Desktop
CYME Server
DG Applications
Server
CYME
Database
Network Model
Application Architecture
• Based on CYME Server and CYME DB
• New DB for DG Screening application

Pre-Application
Screens a-d
a. Total Capacity (MW) of substation/area bus or bank and circuit
b. Allocated Capacity (MW) of substation/area bus or bank and circuit
c. Queued Capacity (MW) of substation/area bus or bank and circuit
d. Available Capacity (MW) of substation/area bus or bank and circuit
Summary – Screens a,b,c,d
Device A (MW) B (MW) C (MW) D (MW)
Bank 50.5 15.4 28.1 7.0
Breaker 9.5 3.2 5.6 0.7

Pre-Application
Screens e-I
e. Substation nominal distribution voltage (e.g. 12 kV)
f. Nominal distribution circuit voltage (e.g. 12 kV)
g. Approximate circuit distance between the proposed site and the substation.
(e.g. 56,000 ft)
h. Relevant Line Section(s) peak load estimate, and minimum load data, when
available.
i. Number of protective devices and number of voltage regulating devices
between the proposed site and the substation/area. (e.g. 3 Protective Devices
and 1 regulating devices)
Device Peak (kW) Min (kW)
Bank 5,200 3,800
Breaker 2,500 1,000
Fuse 185 45

Pre-Application
Screens j-l
j. Whether or not three-phase power is
available at the site. (e.g. No)
k. Limiting conductor rating from proposed
Point of Interconnection to distribution
substation. (e.g. 120 Amps)
l. Based on proposed Point of Interconnection,
existing or known constraints such as, but
not limited to, electrical dependencies at that
location, short circuit interrupting capacity
issues, power quality or stability issues on
the circuit, capacity constraints, or
secondary networks. (e.g. Existent
Synchronous machines)

Pre-Application
Report
• Automated
• WORD Format
• Customizable

GIP California Rule 21
CYME DG Interconnection Application
California Rule-21
• Dashboard
• Step-by-Step
• Colors
• Pass – Green
• Failed – Red
• Arrows to guide
through screens

DG Application
Properties
- Project General Info
- Nominal Ratings
- Feeder and Bank Id
- Installation Type
- Dates

Global Parameters
- FERC Limits
- Rule 21 Limits
- All limits are then user-
defined
- Default values are
found in FERC and
Rule 21 documentation

DG List Manager
- Retrieved from enterprise database
- Status – Active, Widthdrawn…
- Possibility of adding projects (DG)

Pre-Screens – 1 through 4
• Screens 1-4
• Screen 1: Complete/Valid Interconnection Request
• Checks if DB connection and data is correct
• Screen 2: Does the Applicant choose to go directly to
Detailed Studies? Yes or No
• Screen 3: Non Export/Net Energy Metering (NEM) or
Export?
• Screen 4: Fast Track Eligibility

Initial Review – A through H
• If Screens A through H fails, solutions to mitigate the
impact of failed screens:
• Replace an overloaded distribution transformer
• Replace overloaded secondary conductors
• If no quick solutions can be adopted, then
supplemental review is required

• Screen A : Is the PCC on a Network Secondary
System. Yes or No
• Screen B: Is Certified Equipment used? Yes or No
• Screen C: Is the Starting Voltage Drop within
acceptable limits?
• Calculation for Induction Machines based on Starting In-
Rush current vs. Nominal Transformer Current
• Screen D: Transformer Rating
• Compares transformer rating with aggregated gross
nameplate rating of the installation

• Screen E : Does the Single-Phase Generator cause
unacceptable imbalance? Yes or No
• Screen F: Is the Short Circuit Current Contribution
Ratio within acceptable limits?
• Short-Circuit Current Ratio (SSCR) Calculation
Where SCCR (%) = Short Circuit Contribution of DG / Short Circuit Current at PCC

• Screen G : Is the Short Circuit Interrupting Capability
Exceeded?
• Screen H : Is the line configuration compatible with the
Interconnection type?
Primary Distribution
Line Type
Type of Interconnection to
Primary Distribution Line
Result/Criteria
Three-phase,
three wire
3-phase or single phase, phase-
to-phase
Pass screen
Three-phase,
four wire
Effectively-grounded 3 phase or
Single-phase, line-to-neutral
Pass screen
Three-phase,
four wire
All Others To Pass, aggregate DG Capacity must be
less than or equal to 10% of Line Section
Peak Load

Quick Review
Continue the Initial Review
or
Go to Supplemental Review

Initial Review – I through M
• Screen I : Will power be exported across the PCC?
If no, Generating Facility must incorporate one of the following:
• Reverse Power Protection
• Minimum Power Protection
• Certified Non-Islanding Protection
• Relative Generating Facility Rating
• Inadvertent Export
• Screen J : Is the Gross Rating of the Generating
Facility 11 kVA or less?

Initial Review – I through M
• Screen K : Is NEM project whose nameplate capacity is <=
500kW?
• Screen L : Transmission Dependency and Transmission
Stability Test. Yes or No
• Screen M: Is the aggregate Generating Facility capacity on the
Line Section less than 15% of Line Section peak load for all line
sections bounded by automatic sectionalizing devices?

Supplemental Review – N through P
• Screen N : Penetration Test
• Similar to test M
• Screen O : Power Quality and Voltage Tests
• A) Voltage regulation
• B) Voltage fluctuation/flicker under limits IEEE 1453
• C) Harmonics levels meets IEEE 519 limits
• Screen P: Safety and Reliability Tests
• 1. Generation energy source
• 2. Modes of synchronization
• 3. Unique system topology
• 4. Possible impacts to critical load customers

Report
• Automated
• WORD Format
• Customizable
• 10-12 page report
• Introduction
• Project Information
• Initial Review Process
• Summary
• Required Information to
conduct a supp. Review
• Next Steps

GIP FERC
CYME DG Interconnection Application
FERC
• Dashboard
• Step-by-Step
• Colors
• Pass – Green
• Failed – Red

GIP FERC
CYME DG Interconnection Application-FERC
• Similar to California Rule 21
• DG Application Properties
• Global Parameters
• DG List Manager
• Differences with California Rule 21
• Labels and screens title
• Global parameters default values

GIP FERC
Initial Review – 1 through 10
• Screen 1: Complete/Valid Interconnection Request
Same as Screen 1 of Rule 21
• Screen 2: Aggregate generation <= 15% of line
section peak load? Same as Screen M of Rule 21
• Screen 3: Is the PCC on a Network Secondary
System. Same as Screen A of Rule 21
• Screen 4: Is the Short Circuit Current Contribution
Ratio within acceptable limits? Same as Screen F of Rule 21
• Screen 5: Is the Short Circuit Interrupting Capability
Exceeded? Same as Screen G of Rule 21

GIP FERC
• Screen 6: Is the line configuration compatible with the
Interconnection type? Same as Screen H of Rule 21
• Screen 7: Single Phase Generating Facility <=
20kW? Similar as Screen J of Rule 21 (only for single phase)
• Screen 8: Single Phase Generator with Center Tap ?
For single phase generator,
comparison with gross nameplate
rating with distribution transformer
nameplate rating. The ratio must
be less than maximum distribution
transformer nameplate rating ratio

GIP FERC
• Screen 9: Aggregate Generating Facility at
Transmission <= 10MW
• Screen 10: No Construction of Facility Required
Comparison with gross nameplate
rating with maximum aggregate
generating facilities at
transmission.

GIP FERC
Report
• Automated
• WORD Format
• Customizable
• 10-12 page report
• Introduction
• Project Information
• Initial Review Process
• Summary
• Required Information to
conduct a supp. Review
• Next Steps

Conclusion
• New software desktop application
• Facilitate generator interconnection review
• Connected to CYME DB through CYME Server
• Customize enterprise DB connection

Q&A / Discussion

2014 PV Distribution System Modeling Workshop: DG Screening Tool: Jean-Sebastien Lacroix, CYME

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2014 PV Distribution System Modeling Workshop: DG Screening Tool: Jean-Sebastien Lacroix, CYME