UL1741 SA, IEEE 1547 and IEEE 1547.1 Tim Zgonena UL LLC July 12, 2017

UL and the UL Logo are trademarks of UL LLC © 2017. All rights reserved. No portion of this material may be reprinted in any form without the express written permission of UL LLC. or as otherwise provided in writing.

WE ARE A GLOBAL FORCE

FOR GOOD

2

Standards

Research

Asia Australia

Bangladesh

Greater China

India

Japan

Malaysia

New Zealand

Philippines

Singapore

South Korea

Thailand

UAE

Viet Nam

3

Latin America Argentina

Brazil

Mexico

North America

37% of employees

44% of revenue

Europe & Latin America

12% of employees

15% of revenue

Asia & Africa

41% of employees

41% of revenue

Where we are

Europe Denmark

France

Germany

Italy

Netherlands

Poland

Spain

Sweden

Switzerland

Turkey

United Kingdom

North America Canada

United States

Global UL

10,715 employees

>100 locations in 34 countries

Serving customers in >100 Countries

Africa South Africa

Tunisia

Where does UL help?

Functional Safety

Hazardous Locations

Inverters Large

Format Batteries

PV / PV Power Plants

Smart Meters

(Smart Grid)

Wind Power & Controls

Electric Vehicles

Grid Interconnect

4

Tailored specifically to the needs of product manufacturers, developers and renewable energy

project owners/operators.

Most Traditional UL Equipment Safety

Standards Evaluate

• Functionality • Electrical Hazards • Fire Hazards • Mechanical Hazards • Verification of electrical ratings

• These hazards are evaluated and tested

under normal and foreseeable abnormal conditions

UL 1741 Covers Power Conversion and Protection Equipment for the Following Types of DR products:

• Photovoltaics, PV

• Fuel Cells

• Micro-turbines

• Wind and Hydro Turbines

• Engine Generator Set

• Utility Interactive Inverters

• Stand Alone Inverters

• Multi-Mode Inverters

• AC Modules

• Charge Controllers

• PV Balance of Systems,

• Combiner Boxes, GFDIs, etc

6

Grid Interconnection -Traditional US Standards for

Inverters and Power Conversion Equipment

IEEE 1547 Interconnection System

Requirements

IEEE 1547.1 Interconnection System Testing

• Voltage Regulation

• Disconnects

• Monitoring

• Islanding

• Power Quality

• Temperature Stability

• Response to Abnormal

Voltage

• Response to Abnormal

Frequency

• Synchronization

• Protection from EMI

• Surge Withstand

• Paralleling Device

• DC Injection

• Unintentional Islanding

• Reverse Power

• Open Phase

• Reconnect after

disturbance

• Harmonics

UL1741 Grid Interactive Product Safety

•Construction

•Testing Normal and

abnormal

•Protection against risks of

injury to persons and

connected equipment.

•Ratings, Markings and

Instructions

•Specific DR Tests for

specific technologies

•Production line testing

•Certifications address NEC

and electric utility

interconnection needs.

• Identify who and what the demand drivers are for the new advanced inverter requirements. US areas of high PV penetration can no longer afford a “get out of the way approach” to address distributed generation (DG) grid interconnection.

• Grid Support / Advanced Inverter functionality allow public utilities to control DG equipment intelligently to maximize the grid’s reliability and flexibility. It is the foundation of the smart grid and the future of energy distribution with ever increasing amounts of DG.

• California and Hawaii have mandated advanced inverter functionality and the need to comply with these new requirements raises the bar for grid interconnection in the United States. This change established the need for the new Grid Support Inverter testing and certification requirements.

Advanced Inverter Movement What is Advanced Grid Support Inverter Testing and Why is it Important?

What was the process for the creation of the UL1741 SA? • Developed with industry: The UL 1741 SA task group.

• Weekly meetings for 19 Months with 40+ members.

• Participation from: • Inverter Industry

• Electric Utilities – CA, HI and AZ

• National Labs – SANDIA and NREL

• Electrical Power Research Institute (EPRI)

• Other Test Labs

• The UL 1741 SA Draft reached a consensus after the STP comment and balloting process that included addressing 650+ STP comments.

• UL 1741 SA specifies the test methods to evaluate compliance with electric utility Source Requirement Document (SRD) for limits and parameter settings. The UL 1741 Supplement SA is part of UL 1741 and was published on Sept 7, 2016.

• California Electric Rule 21 made by the California Public Utility Commission (CPUC) is an SRD which can be used with UL 1741 SA. Other SRD’s like Hawaiian Electric HECO 14H may also be used with the UL1741 SA.

• Changes to California Rule 21 and Hawaiian Electric 14H will require all inverters to be certified “listed” as a UL1741SA “Grid Support Interactive Inverter” for all new installations on Sept 7, 2017.

Advanced Inverter Movement Which Standards are Used for Advanced Inverter Testing?

UL1741 SA Combined with the SRDs Provides an Evaluation and Certification Program to Meet the Needs of Various Electric Utilities

The 1741SA is like a

multi purpose tool into

which the SRD specific

utility evaluation criteria

is inserted.

It may be possible to

reduce test time by

combining the criteria

of Multiple SRDs into

one test sequence.

UL 1741 SA – Modern Grid Support

Interconnection What Tests are Part of UL 1741 SA?

Required Tests

• Anti-Islanding (with advanced

features active during test)

• Low/High Voltage Ride Through

• Low/High Frequency Ride Through

• Must-Trip Test

• Ramp Rate (Normal & Soft-Start)

• Specified Power Factor

• Volt/VAr Mode

Optional Tests (Depends on SRD Being Utilized)

• Frequency Watt

• Volt Watt

= ~

UL1741SA Scope (Required vs Optional) • SA1.7 ……While the Grid Support utility interactive

inverters share some similar functionality with the previously defined special purpose utility interactive inverters that have potentially variable compliance requirements, the Grid Support Utility interactive inverters are required to and shall comply with the following defined requirements before they can be marked as a Grid Support Utility Interactive Inverters. Some of the requirements in this supplement are defined as optional, see Frequency-Watt (FW) - Optional, Section SA14, and Volt-Watt (VW) - Optional, Section SA15, and are not required to be included or complied with as part of the evaluation. Functions specified in this document as optional shall be evaluated if provided.

•

13 UL Advanced Red

UL1741 SA Grid Support Performance Focus • 97.35912% Performance

• 2.64088% Safety

Performance

Safety

SA5 Performance and Safety

• Grid support interactive functions may affect the results of some required tests in the Performance sections of UL 1741, therefore, EUT grid support functions shall be enabled and set to produce the worst case conditions for the specific test.

• Note: In some cases it may be necessary to repeat the test under multiple settings to determine the worst case.

15

SA 5.1 Grid support utility interactive inverter or converters shall be tested for compliance with the requirements in UL 1741 specified for utility interactive products except as defined in SA5.2 and SA6.

Need to Differentiate Utility Interactive Products

Traditional UL1741 IEEE 1547 & 1547.1

Interconnection Requirements

Utility Interactive

UL 1741 SA Grid Support Functions

Grid Support Utility Interactive

Specific Mfr / Utility Defined

UL Verified Compliance

Special Purpose Utility Interactive

• The above categories clearly define product functions and ratings per the product’s markings, ratings, manual, and certification documentation.

Need to Differentiate Utility Interactive Products

• UL Certification: Grid Support, Utility Interactive Product

• Scope: Safety & Electric Shock Certification to UL1741 including UL 1741 SA for grid support and general grid interconnection per IEEE 1547

Utility interactive product with grid

support functionality

UL 1741: electric shock and

fire compliance

IEEE 1547 & IEEE 1547.1 general grid

interconnection requirements

UL 1741 SA: grid support functionality

per SRD (e.g., Rule 21)

Includes Testing to Verify:

1. UL 1741 electric shock/fire tests

2. UL 1741 SA grid support tests

3. Unique tests of IEEE 1547 for general grid interconnection not covered by UL 1741 SA tests

Deliverable: UL Certification as a Grid Support Utility Interactive product

California Rule 21 Test Summary

Test Summary Validates • Inverter model • Inverter ratings • Critical Test parameters • All UL1741 SA tests were run • Inverter firmware version • Sign off on all tests by NRTL

Quick easy means for CA utilities to verify all UL1741 SA tests were run to fulfill Rule 21 SRD requirements and the inverter was found compliant by the NRTL

Grid Support Data Mountain!

SA testing assuming one model with one set of electrical rating.

• A conservative estimate of 786 test files.

• If your ride through times are not overly ambitions (long).

• After testing you have a mountain of data that must be carefully reviewed and mined for specific results data and further calculated to validate compliance with mfr ratings and declarations.

• SA 8 AI (Total testing between 702 and 390 shots). Using 390 for the total estimation.

• SA 9 Volt must trip / ride through (Total test files 160) • SA 10 Hz must trip / ride through (Total test files 90) • SA 11 RR, (Total test files 6) • SA 11 soft RR (Total test files 6) • SA 12 SPF (Total test files 36) • SA 13 VV (Total test files 54 • SA 14 F-Watt (Total test files 36) • SA15 VW (Total test files 18)

• These numbers assumes everything goes right the first time.

UL1741 SA Estimated Test Time

• With automation 3 to 4 weeks

• Without Automation 6 to 8 weeks

• These estimates do not include the other required testing.

• IEEE 1547 and IEEE 1547.1 testing including the Interconnection Integrity testing that most often is in an outside EMC laboratory 1 to 2 weeks

• UL1741 Safety Testing 1 to 2 weeks

• Additional time may also be added for: • PV Rapid Shutdown

• PV AFCI

• PV Ground Fault

Grid Interconnection Standards

21 UL Advanced Red

1) UL1741 SA is being used to fulfill Grid Support Interactive Inverters

certification needs of early adopters like CA - Rule 21 and HI - 14H.

2) IEEE 1547 should be published in late 2017.

3) IEEE 1547.1 Should be published in mid to late 2018.

4) After the publication of IEEE 1547 and IEEE 1574.1 UL 1741 will be

revised to replace the Supplement SA requirements with references to

the newly revised IEEE 1547 and IEEE 1547.1.

Standards Interactions and Overlaps

UL1741

Transition from New Conceptual Designs into Marketable Products

• Many new fantastic innovative product ideas.

• Most of these new products will need to comply with building codes before they can be accepted for general use in the US or Canada.

• Sometimes these new and innovative products do not neatly fit into existing codes, standards and certification categories.

• UL works with industry to develop new codes and standards to facilitate getting new technologies certified and accepted in the field.

UL and the UL Logo are trademarks of UL LLC © 2016. All rights reserved. No portion of this material may be reprinted in any form without the express written permission of UL LLC. or as otherwise provided in writing..

Thank you! Tim Zgonena UL LLC

Visit us Globally at http://www.ul.com

UL Customer Service

Phone: 1-(877-854-3577) x55703

Email: RenewableEnergyQuote@ul.com

Field Evaluations

http://corporate.ul.com/departments/fs/FE/fe_home.htm