EPRI-Sandia Symposium on Secure and Resilient Microgrids

August 30, 2016

Agenda 2

PECO Microgrid Project Overview – Eric Stein

EPRI Microgrid Optimization Study – Travis White

Utility Integrated Microgrid Framework & Challenges – George Sey

Background 3

In October 2015, the Pennsylvania PUC approved PECO’s System 2020 five year plan to install advanced equipment, making the PECO system more weather resistant and less vulnerable to storm damage. As part of this plan, PECO communicated that it was developing a proposal for a state-of-the-art microgrid demonstration pilot

PECO evaluated many potential projects with a focus on providing critical goods and services to surrounding area customers during extended outage periods. Projects were evaluated with a selection criteria that focused on; customer mix, reliability and resiliency enhancement, capacity need, surrounding population density, and accessibility.

Conceptual designs of the four highest potential pilot opportunities were further developed and evaluated by performing formal feasibility studies

The Concord Township Microgrid Project was identified as the best choice as a demonstration project that would deliver real benefits and allow PECO to evaluate microgrid technologies for future application.

PECO filed a petition for allowance with the Pennsylvania PUC to construct the Concord Microgrid Project in May of 2016. A decision is anticipated by the first quarter of 2017

PECO is also participating on the Philadelphia Navy Yard Microgrid Project Team. This project will provide important lessons learned that will facilitate future deployment of advanced microgrid energy systems

Slide 4

PECO Microgrid Project

*Sited on Customer Property

Microgrid 1Microgrid 2

*Li-Ion BESS 2x100 kW

*Roof-Top PV 260 kW

*Carport PV 74 kW

*Wind Turbine 160 kW

*Rooftop PV 930 kW

Municipal Building, and Fire Station

Level 2 EV Chargers

Level 3 EV Chargers

CC

C

Shopping Center

CHotel

Shopping Center Hotel

CCShopping Centers

NG Engine 1980 kW

NG Engine 1980 kW

NG Engine 1980 kW

NG Engine 1980 kW

NG Engine 1980 kW

Shopping Center

Multiple Building Locations

Retirement Home, Gas Station, Food, ATM,

Sewage Plant

Shopping Center

4.0 MW Peak

4.6 MW Peak

Ground Mount PV500 kW

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Customers include; medical and surgery centers, retirement community, township building, fire station, sewage plant, gas stations, supermarkets, convenience stores, restaurants, pharmacies, bank services, home improvement, hotels, shelter, and retail space

*EV Chargers

Li-Ion BESS 200 kW

Operational & Design Overview 5

Peak generation capacity allows for full islanding without demand response Transition between all modes of operation Environmentally friendly renewable DER BESS to maintain high power quality - renewable smoothing, generator loading, loading shedding,

and demand transitions Uninterruptible power supply for fire house, township building, and shelter Remotely controlled load centers to coordinate load block management and fault isolation Coordination with existing utility distribution automation schemes Protection and control coordination with utility for island and parallel operation Economic dispatch of DER during parallel operation Remote DMS control and monitoring from PECO Operations Control Center

EPRI Microgrid Optimization Study 6

The objective of this study is optimize the current conceptual design

One year of historical load profile is being used to optimize DER resource type and size to deliver optimal operational effectiveness and economic dispatch

Data integrity and organization has been a challenge

Load profile data is being organized in a nodal (load center) format to perform the analysis

DER-CAM - Distributed Energy Resources Customer Adoption Model is the primary tool that is being used to perform this analysis • Allows users to perform scenario analysis of system to optimize design• Economic and environmental model of customer DER adoption• Determine the optimal Microgrid configurations as well as operating strategies• Developed at Lawrence Berkley National Lab in 2000• Aims to minimize the cost of operating on-site generation• PECO is the 1st utility using this tool to evaluate a “Utility Integrated Microgrid”

Other tools are also being used to provide additional insights

EPRI Microgrid Optimization Project 7

Current Project Status• All interval Load data has been collected• Currently extracting all conductor types, lengths and impedances for Power Flow

analysis

EPRI Deliverable• DER-CAM scenario report for 4 seasons• DER-CAM Power Flow Model (multi-node analysis)• Cost/Benefit Analysis

Objectives • Support DER-CAM tool development and enhancement for utility use• Provide feedback on how to make tool more effective and easier to use• Support EPRI’s Integrated Grid vision to move toward in developing a process for

taking a project from concept to execution

EPRI Microgrid Optimization Study

Challenges• Extracting one year of Demand Data to develop an aggregate load profile for

customers served by the microgrid- Interval Mix (15 & 30 min) - Variety of meter types- Data gaps due to customer relocations and meter upgrades occurring within

the sample data set

• Extracting existing infrastructure information need for power flow modeling.- Conductor Type- Impedance- Lengths - Nodes

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Privileged & Confidential – Prepared at the Request of Counsel – Not For Distribution

Microgrid Site Geographic Overview

Complex

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Overarching Framework• Select critical public purpose customers dispersed among disparate feeders• Point of Common Coupling (PCC) creation• Foundational hardening minimization• Contingency Management

Demand Data Granularity• Traditional utility analysis philosophy may not be adequate• Readily available information lacks high resolution• Customer-level analysis requires AMI infrastructure with adequate sampling rate• Data repository access may be a challenge

Island Mode Operational Pillars• PA law mandated voltage band must be maintained

- 120V nominal (+/-5% for residential and +/-10% for commercial/industrial)• Generation capacity must support total load• Multi-customer coordination and integration of existing DERs must be considered

Utility-Integrated MG Challenges

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Concord Township microgrid to be a one-of-a-kind system facilitating learnings that can be leveraged for future deployments

Anticipate PUC decision by 1st Qtr. 2017

Preliminary site requirement, generation/configuration optimization, and power flow analysis on-going with EPRI

Design & operational objectives of utility-integrated vs. campus-based systems differ to a degree

Utility philosophies must adapt to properly conceive, implement, and successfully build & operate an effective microgrid

Next step is hardware in the loop (HIL) simulation testing to evaluate dynamic system response and protection and control requirements

Summary