Establishing a Community Microgrid A resilient, renewable energy - PowerPoint PPT Presentation

Establishing a Community Microgrid A resilient, renewable energy solution Bob O’Hagan Frank Wasko Programs Engineer Managing Director 408-394-9067 mobile 949-501-0967 mobile bob@clean-coalition.org frank@clean-coalition.org Making Clean Local Energy Accessible Now 07 Nov 2019

Presentation Outline • Background • About the Clean Coalition • Unleashing wholesale distributed generation • Microgrids • Microgrids • Community microgrids • Sample from PAEC grant project • FITs • Example: Humboldt County Airport • Q&A Making Clean Local Energy Accessible Now 2

About the Clean Coalition Making Clean Local Energy Accessible Now 3

Clean Coalition (non-profit) Mission To accelerate the transition to renewable energy and a modern grid through technical, policy, and project development expertise. Renewable Energy End-Game 100% renewable energy; 25% local, interconnected within the distribution grid and ensuring resilience without dependence on the transmission grid; and 75% remote, fully dependent on the transmission grid for serving loads. Making Clean Local Energy Accessible Now 4

Wholesale DG is the Critical & Missing Segment Project Size Central Generation Serves Remote Loads 50+ MW Wholesale DG Serves Local Loads 500 kW Retail DG Serves Onsite Loads 5 kW Distribution Grid Transmission Grid Behind the Meter Making Clean Local Energy Accessible Now 5

Microgrid – one definition From: U.S. Department of Energy Microgrid Exchange Group A microgrid is a group of interconnected loads and distributed energy resources within clearly defined electrical boundaries that acts as a single controllable entity with respect to the grid. A microgrid can connect and disconnect from the grid to enable it to operate in both grid-connected or island-mode. Making Clean Local Energy Accessible Now 6

Microgrids Electricity generation and storage occurs on site, behind the utility meter. If the utility disconnects power, the specific building will stay energized. Making Clean Local Energy Accessible Now 7

Must decide the priority of loads to be served Making Clean Local Energy Accessible Now 8

Community Microgrid A Community Microgrid serves an entire community by ensuring indefinite renewables-driven backup power for critical community facilities such as fire stations, water and communications infrastructure, hospitals and emergency shelters. https://www.noozhawk.com/article/craig_lewis_community_microgrid_public_safety_power_shutoffs_20191023 Making Clean Local Energy Accessible Now 9

Core PAEC Region with Solar Siting Survey Making Clean Local Energy Accessible Now 10

Redwood City Disadvantaged Community and Community Microgrid Sites Redwood City Redwood City Corporate Yard Stanford Medicine USPS Outpatient Clinic Sobrato Broadway Plaza San Mateo CVS County Corporate Yard Hoover Park Boys & Girls Club Stanford Redwood City Hoover Elementary School Making Clean Local Energy Accessible Now 11

Redwood City Community Microgrid Conceptual Diagram Making Clean Local Energy Accessible Now 12

Hoover Cluster Conceptual Diagram Proposed trenching path M Hoover Park Meter Main 18 kW Rooftop Solar BGCP Meter Main M BGCP Main Transformer 30 kW/ 150 kWh Battery Hoover School Meter Main 83 kW Solar Carport M 10 L2 EVCI ports Hoover School Main Transformer 10 L2 EVCI ports Proposed overhead conduit path 77 kW Solar Carport 10 L2 EVCI ports 73 kW Rooftop Solar 126 kW Solar Carport Not drawn to scale Making Clean Local Energy Accessible Now 13

ICA (Interconnection Capacity Analysis) Map for PCE HQ Making Clean Local Energy Accessible Now 14

Benefits of a FIT • Unleashes commercial-scale project opportunities : A FIT simplifies the process for all properties to participate in energy generation, which is not true of Net Energy Metering (NEM). FITs address all properties, including those that are non-owner occupied and split-metered. FITs also maximize siting potential by eliminating any on-site load limitations. • Maintains retail customer relationships: 100% of FIT energy is delivered to the Load Serving Entity (LSE) wholesale and the LSE’s retail customers, even those hosting FIT projects, continue paying for 100% of the energy they consume under a normal retail tariff. Importantly, this maintains customer motivations to pursue energy efficiency measures. • Guides the market to build desired Wholesale DG projects : Through design features, including pricing adders, FITs can be tailored to drive deployment of projects that have specific characteristics such as location, size, configuration (on built-environments etc.) and dispatchability (via renewables+storage pairing). Making Clean Local Energy Accessible Now 15

Deployment Summary Total% Meters%or% NEM%Solar% FIT%Solar% Solar%[kW% Battery% Battery% EVCI% Site%Name Buildings Critical%Loads [kW%AC] [kW%AC] AC] [kW] [kWh] (Level%2) Stanford)Redwood) Campus)emergency) City P1,)B16B4 886 0 886 251 2,100 52 response Phase)1 Hoover)School Shelter)&)food)service 73 203 276 29 150 20 Hoover)Cluster) Boys)&)Girls)Club Shelter)&)food)service 11 90 101 0 0 10 Hoover)Park Equipment)staging 0 0 0 0 0 0 Road)and)public) Redwood)City) Redwood)City) facility)maintenance) 136 352 488 58 360 *4 Corporate)Yard Corporate)Yard and)repair Road)and)public) San)Mateo)County) San)Mateo)County) facility)maintenance) 100 173 273 TBD TBD *4 Corporate)Yard Corporate)Yard and)repair Sobrato)Broadway) Sobrato)Broadway) Plaza)(multiple) Low)income)housing 0 1,197 1,197 TBD TBD TBD Plaza meters) Sobrato)CVS Pharmacy)&)grocery 0 83 83 TBD TBD TBD New)Deployments)TOTAL %%%%%%%%%%%%1,206% %%%%%%%%%2,098% %%%%%%%%%3,304% %N% 2,610 82 With net metering, only 1.2 MW can be deployed. With a new FIT program, an additional 2.1 MW of local, renewable generation could be deployed in a disadvantaged community. Making Clean Local Energy Accessible Now 16

Humboldt County Airport Microgrid – Multi-customer March 9, 2018 By Renewable Energy World Editors California is hoping that lessons learned from a new microgrid project at Humboldt County’s regional airport will help create a road map for microgrid integration in the state. The microgrid, which was designed by the Schatz Energy Research Center, will include a 2.3-MW solar PV array and an 8-MWh battery storage system. It will support 18 electric accounts , including the airport in Humboldt County and the U.S. Coast Guard Air Station, Humboldt Bay. The California Energy Commission in February awarded a $5 million grant through its Electric Program Investment Charge program … The Schatz Center said that the microgrid, which is the first multi-customer microgrid in Pacific Gas and Electric’s service territory , will provide a test bed for the policies, tariff structures, and operating procedures necessary to integrate microgrids into California’s electric grid. Source: http://www.renewableenergyworld.com/articles/2018/03/can-this-airport-... Making Clean Local Energy Accessible Now 17

Q & A Thank you! Bob O’Hagan Programs Engineer 408-394-9067 mobile bob@clean-coalition.org Making Clean Local Energy Accessible Now 18

Excerpts from PAEC Grant Study Making Clean Local Energy Accessible Now 19

PAEC SSS Summary by PV Size Summary by Structure PV Size Num_Sites kW_Total PV W_AC >= 500 kW > and >= 250 kW Less than 250 kW Totals: 484 66,228 kW 24 17,073 kW 56 18,840 kW 404 30,315 kW Atherton, CA 94027 33 1,502 kW - - kW - - kW 33 1,502 kW Menlo Park, CA 94025 102 18,909 kW 7 5,786 kW 17 5,544 kW 78 7,579 kW East Palo Alto, CA 94303 91 8,134 kW 4 2,499 kW 2 575 kW 85 5,060 kW Redwood City, CA 94061 14 1,190 kW - - kW 1 445 kW 13 745 kW Redwood City, CA 94062 18 740 kW - - kW - - kW 18 740 kW Redwood City, CA 94063 90 17,532 kW 9 6,466 kW 13 4,349 kW 68 6,717 kW Redwood City, CA 94065 53 10,049 kW 1 532 kW 17 5,968 kW 35 3,550 kW San Carlos, CA 94070 42 5,618 kW 2 1,258 kW 5 1,633 kW 35 2,727 kW Belmont, CA 94002 27 1,403 kW 1 532 kW - - kW 26 871 kW Woodside, CA 94062 14 1,151 kW - - kW 1 327 kW 13 824 kW Making Clean Local Energy Accessible Now 20