Distributed Energy Resource Management Systems (DERMS). DERMS.pdf · 2018. 10. 30. · DERMS...

© 2018 Electric Power Research Institute, Inc. All rights reserved.

Brian SealElectric Power Research Institute (EPRI)

BIXPOWednesday, November 7th, 2018

Distributed Energy Resource Management Systems

(DERMS)

2© 2018 Electric Power Research Institute, Inc. All rights reserved.

Based on IEC 61850-7-420 / 61850-7-520

Multiple available: SunSpec, DNP3, 2030.5, 61850-8-2

UL 1741SA (published)IEEE 1547.1 (in process)

IEEE 1547-2018 and regional codes like CA Rule 21 and Hawaii Rule 14H

UL 1741SA products available now, IEEE 1547.1 products ~ 1-yr out

Common Functions for Smart DER

Standard Device Communication Interfaces and Protocols

Grid Codes

Test Procedures

Certifi-cation

Foundation for DERMS - DER Devices are Ready


Need for DERMS

Grid-Oriented Services are

Needed

Device-Oriented Functions are Ready

• Grid-aligned DER services• Simple control actions• Energy-centric interactions

• Many individual devices• Complex settings• DER-type-specific interactions

DERMS


What Does a DERMS Do?

• Aggregate

• Simplify

• Optimize

• Translate


Common Functions for DER Group Management


Content and Methods 1 INTRODUCTION2 FRAMING THE DISCUSSION: WHAT IS DER GROUP MANAGEMENT?3 SUPPORTING DER AGGREGATION AT MULTIPLE LEVELS4 ACTIVITIES OF THIS INITIATIVE5 SCOPE OF THIS INITIATIVE: LIMITATIONS AND DEPENDENCIES6 PRIORITIZATION AND PRECEDENCE OF DER GROUP MANAGEMENT FUNCTIONS7 RESPONSE SUCCESS & FAILURE INDICATORS8 DER GROUP CREATION9 DER GROUP VERSION AND MEMBER QUERY10 DER GROUP DELETION11 DER GROUP MAINTENANCE (ADDING, UPDATING, AND DELETING MEMBERS)12 DER GROUP CAPABILITY DISCOVERY13 DER GROUP STATUS MONITORING14 DER GROUP FORECASTING15 DER GROUP HISTORICAL AGGREGATE METER DATA16 DER GROUP MAXIMUM REAL POWER LIMITING17 DER GROUP RAMP RATE LIMIT CONTROL18 DER GROUP PHASE BALANCE LIMITING19 DER GROUP REAL POWER DISPATCH20 DER GROUP REACTIVE POWER DISPATCH21 DER GROUP VOLTAGE REGULATION FUNCTION22 SET DER GROUP CURVE FUNCTIONS23 PROVIDE PRICES TO DER GROUP24 REQUEST COST OF SERVICE FROM DER GROUP25 MANAGE POWER AT A POINT OF REFERENCE26 CONNECT/DISCONNECT DER GROUP27 SPECIFY BELLWETHER METERS

Report 3002008215

Four Function Categories:• Group Setup• Monitoring, Capabilities, Status• Operational Boundaries / Limits• Control Functions


DERMS Architectural Extensibility

DERMS DERMS DERMS

Solar Aggregator

Storage Fleet Manager

Device Vendor or Mixed Aggregator

DERMS

Microgrid

DERMS

Flexible Interconnection Customer

DERMSSubstation or

Feeder Smart Facility or Home

DERMS

ISO/RTO Markets


DERMS Architectural ExtensibilityBasic Requirements

• Must be secure – consistent approach to cyber security across all interfaces

• The core definitions of DERMS must be applicable at multiple levels: homes, facilities, feeders, segments, microgrids, cities

• Must support both utility and third-party aggregation

• Must support central and distributed intelligence (Federated Architecture for DER)

• Must be scalable and sustainable – open and standards based


Example Drivers for DERMS Adoption


Outperforming Autonomous Settings

Fixed Power Factor HC = 2.5MW

DERMS Var Control HC = 3.2MW

EPRI research is working to discover the best possible with fixed/autonomous DER functionality, such as learning smart inverters

DERMS control systems bring complexity and cost. The value depends on the incremental benefits that can be achieved over autonomous functionality.

§ Hosting capacity§ Efficiency/Losses§ Power quality§ Reliability


Voltage Support

Traditional Methods

Increased penetration of unmanaged DER can cause voltage violations that can compromise system operation and the quality of service needed by customers

Role of DERMS• Voltage support can be requested from

DER• DERMS control systems organize DER to

provide voltage support


Mitigating Thermal Constraints

Traditional Methods

Grid congestion events arise when there is a overload of certain elements in the distribution grid, typically line segments or transformers working over their rated power.

Role of DERMS• Can DERMS actively manage DER to

provide distribution services reliably and consistently ?

• Can DERMS control systems orchestrate DER to postpone or even prevent network upgrades due to DER?


Flexible Interconnection / Dynamic Power ControlAlternative and cost effective interconnection options that allow for flexible operation of solar PV (active power management) in lieu of grid upgrades.

Role of DERMSActive management of DER using DERMS can enable additional DER and improve grid utilization

• Estimating lost PV production

• Comparing the cost with alternative grid side mitigation


Reliability - Coordinating DER with Circuit Configuration

S/S

DER

Open Close

Close Open

DER

Open Close

Close Open

DER curtail Do not curtail

Tie-switch

Tie-switch

Distribution operators may reconfigure systems for load growth, system maintenance, system contingencies (faults, outages) and need agility to manage DER accordingly

Role of DERMS• Maintain operational flexibility through

active DER management to modify settings in association with circuit configuration


Providing Market & Bulk System Services

Bulk-systems and markets can benefit from services provided by distribution-connected resources.

Role of DERMS• Dispatch protection - DERMS

handling and analyzing DER dispatch to ensure distribution system safety and reliability

• Availability visibility - sharing available network capacity


EPRI DERMS Research Highlights


Defining Standard DERMS Control Methods

Technical analysis and public discourse about DERMS requires open reference descriptions of what a DERMS does. • DERMS Working Group: open forum (technology

providers, aggregators, utilities, academia) - meeting weekly to define control and monitoring functionality

• Outputs are public, contributed to standards organizations

Contacts: Ajit Renjit [email protected] Hubert [email protected] Weng [email protected]


Modeling and Simulation of DERMS Impacts

Power system analysis to compare DERMS to autonomous functionality• Evaluating reference control methods

- Even distribution

- Uniform percentage

- Sequential (e.g. last-in, first-out)

• Evaluating various DER grouping methods

- Location

- X/R ratio

- Voltage min/max

• Evaluating various DERMS iteration/update speeds


Defining DERMS Service Performance Metrics

• DER service quality indicators for utility program requirements

• Building on mature examples from demand response markets

• Practical validation methods and data requirements

• Realtime visibility and after-the-fact settlement

• Anchor in international standards

Examples Adapted from NAESB Retail DR Services Specification


DERMS Full Scale Product Evaluations

Software tools for scale testing of commercial DERMS products. Collaborative development with EPRI, US DoE, NREL, Sandia National Laboratories.

Approach• Devices: Emulation of DER – PV, Storage, Loads• Power Systems: Interfaces to power system

simulators

Research Uses • Development and evaluation of DERMS control

strategies• Interoperability and cyber security testing • Understanding the value of DERMS – hosting capacity

increases, etc.

DERMS


Together…Shaping the Future of Electricity

Distributed Energy Resource Management Systems (DERMS). DERMS.pdf · 2018. 10. 30. · DERMS...

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