1. 2500 R Midtown Sacramento Municipal Utility District
Lupe Jimenez
Manager, Demand Response and Energy Storage
May 4, 2017

2. Residential Energy Smart Community Demonstration
Overview
Research Goals
SMUD, Pacific Housing and Sunverge Energy Partnership
34 single-family new construction homes
25% below T24
Testing ability to monitor and control energy storage, intermittent solar generation, demand-response technologies combined with dynamic pricing
Demonstrate integration of disparate smart grid technologies into a residential package
Evaluate the benefits that these technologies provide to SMUD and our customers
Evaluate the possibility of scale benefits such as:
Spinning and non-spinning reserve capacity
Demand response
Renewable resource firming
Regulation support
Voltage support
Renewable energy time shifting
The Sunverge system captures solar energy and stores it using lithium ion batteries, thereby shifting electrical loads, flattening peak electricity demand and maximizing return on renewable energy investments.

3. 2500 R Street Demonstrated Consumer Model
Zero Net Energy Homes
PCT
Online customer portal:
Generation, consumption, storage, billing, HVAC data
Thermostat controls
Optional TOU-CPP + NEM
Renewable energy time shifting
DR pre-cooling and temperature offset
Modlets received signals to turn off plug-loads at specified locations
The Sunverge system captures solar energy and stores it using lithium ion batteries, thereby shifting electrical loads, flattening peak electricity demand and maximizing return on renewable energy investments.
SIS Unit components include:
Hybrid Inverter Charger
Distribution Panel
Gateway Computer
Solar Charge Controller
Battery Modules

4. Hardware Hybrid Inverter Charger Distribution Panel Gateway Computer
The SIS Unit consists of standard components that have each been certified and tested.
Hybrid Inverter Charger
Distribution Panel
Gateway Computer
Solar Charge Controller
Battery Modules

5. Uninterruptible Power Source
2014 Use Case Test Findings
Average 1.35 kW/system base savings during daily peak period
Fleet operation was confirmed
Peak Load Shifting
Average 1.31 kW/system incremental savings on Conservation Days above peak load shifting
Demand Response
Functioned according to algorithm
Recommended to adjust smoothing period for partly cloudy conditions
PV Smoothing
Performed one simulated, non-integrated regulation test
Response time less than 4 sec. and within 100 W of the requests.
Regulation
Critical load panel appliances continued to operate.
Uninterruptible Power Source
Maintained power quality in accordance with interconnection guidelines.
Power Quality
SMUD Benefits:
Understanding value of zero-net-energy homes to SMUD and our customers
Determining value regarding:
Peak demand management
Regulation support
Intermittent resource support
Improving system reliability
Gaining experience installing and interconnecting this technology
Quantifying utility, customer and system benefits
Understanding grid impacts of multiple residential energy storage systems on the distribution system
Customer Benefits
Very low electricity costs
Enhanced Reliability
Improved power quality
Recovery during power outage
Electricity arbitrage
Buy low, sell high
Peak shifting
Avoid peak prices for consumption
Sell generation at peak prices
Possible Future Use Cases:
System load reduction – reduce customer loads when dispatched by utility based on system conditions (e.g. CPP)
Distribution load reduction – minimize feeder/substation peak load when dispatched by utility
Backflow – reduce peak PV generation flowing on to grid (individually or in aggregate)
PV Firming– smooth PV generation at customer site and/or in aggregate across all SIS units (I know we’d have to define exactly what “smoothing” is)
Regulation- Demonstrate use of Energy Storage to provide ancillary benefits to SMUD or to the CAISO (e.g. fast frequency regulation)
Spinning Reserves- Demonstrate ability and value of spinning reserve
Voltage support – charge/discharge battery to reduce magnitude of voltage fluctuations on grid
Power Factor – maintain power factor within set limits at customer site

6. Benefits SMUD Benefits Customer Benefits Determining value regarding:
Peak demand management
Regulation support
Intermittent resource support
Improving system reliability
Gaining experience installing and interconnecting this technology
Quantifying utility, customer and system benefits
Understanding grid impacts of multiple residential energy storage systems on the distribution system
Very low electricity costs
Enhanced reliability
Improved power quality
Recovery during power outage
Electricity arbitrage
Buy low, sell high
Peak shifting
Avoid peak prices for consumption
Sell generation at peak prices

7. Lupe Jimenez Program Manager, Demand Response Research and Development lupe.jimenez@smud.org

8. Use Cases and Benefits Application Benefit Approach
Time-Of-Use Energy Cost Management
Reduced electricity losses (utility/rate payer)
Reduce grid load during high cost time-of-use daily
Reduced electricity cost (consumer)
Peak Load Reduction
Forecast day-ahead load shifting requirements based upon historical load, weather, PV output, etc. and optimize storage dispatch to shave peak load
Reduced electricity cost (utility)
Voltage Support
Using feeder and transformer monitoring voltages, dispatch storage to maintain voltage within set limits
Phase Balancing
Using feeder and transformer monitoring voltages, demonstrate ability to change loading on a particular phase
Renewables Capacity Firming
Reduced CO2 Emissions (society)
Using SCADA to monitor feeder output during net excess PV output, and local solar irradiance to estimate diminished PV output, vary energy storage discharge to firm PV generated power
Reduced SOx, NOx, PM-2.5 Emissions (society)
Renewables Energy Time Shift
Charge energy storage with PV power during times of excess output, then discharge energy storage later for peak shaving on the distribution system