2014 pv distribution system modeling workshop: dg screening tool: jean-sebastien lacroix, cyme

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

CYME DG Screening Tool

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

Utility

Network Model DMS

Volt/Var Control

Feeder

Automation

Studies & Services

CYME Gateway

CYME Server

CYME DG

Screening Tool

CYMECYME

DG Screening

Database

Distribution Engineer’s Desktop

CYME Server

DG Applications

Server

DatabaseNetwork 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

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

• 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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