1. Integrating Distributed Energy Resource into Grid Operations
John Goodin
Manager, Infrastructure and Regulatory Policy
solarmarket PATHWAYS
May 2, 2017

2. Approx. 5,400 MW BTM solar today
The growth in renewables and distributed energy resources is transforming our energy supply portfolio and how the grid functions.
23,000 MW
Approx. 5,400 MW BTM solar today
130 MW/Mo. Growth Rate
System Peak Demand was 46,232 MW on July 27, 2016

3. The transforming grid is creating new challenges and opportunities.
2/15/2017
The transforming grid is creating new challenges and opportunities.
CPS1 is evaluated on a rolling 12-month average.  Over the past few years, the rolling average has been declining as a result of some poor daily performances.  Thus, the CAISO need to take measures to improve daily performance on days with higher variability.

4. High-DER future provides opportunity to re-think the T-D interface for an integrated decentralized system.
New control & coordination needed at the T-D interface
If not controlled locally, DER variability is exported to the bulk system to be managed
No assurance of dispatch feasibility past T-D interface
How to structure roles & responsibilities of DSO & ISO at the T-D interface?
Reliable, safe operation is essential
Must work as a whole system to achieve policy objectives
Must satisfy customer needs for choice, flexibility & resilience – the bottom-up drivers of change
Retail
Wholesale
Strive to control DER volatility and variability locally by circuit and substation

5. What tools and information must be developed and shared?
Industry must develop better short-term DER operational forecasting techniques and methods
DSO develop robust distribution system control and protection enhancements-- DER Management Systems (DERMS)
DSO communicate advisory information on grid conditions to DER Providers so that DER providers can submit feasible bids/schedules to the ISO
ISO provide schedule information to DSO to assess feasibility and system impacts.
DER provider inform ISO of resource limitations via updated schedules/bids or via outage management system.
DER
DSO
ISO

6. How can we address these impacts to benefit the grid and achieve GHG goals?
Integrate renewables with renewables; smart/sensing inverters
Co-locate solar and storage to shape output and response
Promote transportation electrification
Leverage local and regional collaboration and operational diversity
Enable distributed energy resources and flexible loads
Develop fast, frequent autonomous load response
Deploy dynamic and time-variant rates that align with the needs of the transforming grid
Promote load shift and energy storage capabilities
Encourage targeted energy efficiency measures