UL1741 SA, Rule 21, and what it means for you. Josh Brister Sr. Manager, Product Management and Tech Sales

Transcription

1 UL1741 SA, Rule 21, and what it means for you Josh Brister Sr. Manager, Product Management and Tech Sales

2 Contents What are these requirements? UL versus IEEE versus Rule 21, etc How will this help support the grid? How will this be implemented? How do I remain compliant?

3 What is UL1741 SA? Officially called UL 1741: Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use with Distributed Energy Resources In essence, the test standard by which inverters are certified for interconnection to the grid, with particular respect to: Grid Voltage Grid Frequency Intended to supplement and be used in conjunction with IEEE 1547 (Standard for Interconnecting Distributed Resources with Electric Power Systems) and IEEE (Standard for Conformance Test Procedures) in accordance with NEC Developed by workgroup representing Inverter industry, electric utilities, NREL, EPRI SA is short for Supplement A, an addition to the existing UL 1741 standard Designed to create a standard for inverters more capable of dealing with a volatile grid Future-Proofing by creating a standard for inverters to actively manage grid functions

4 PG&E SCE SDG&E HECO MECO KUIC UL vs. Rule 21 vs. 14H UL 1741 SA Product Certification Standard CA Rule 21 HI Rule 14H State Interconnection Requirements, also called Source Requirements Document (SRD) Local Interconnection Requirements

5 How will UL 1741 SA be implemented? All projects permitted and approved for interconnection on or after September 8 th 2017 will need to be certified to UL 1741 SA In Hawaii In California In other utility districts running pilot programs, such as APS Green Mountain Power Source: Outback Power

6 Labelling Requirements In addition to being approved on state lists, product will need to be physically labelled as Grid Support Inverter rather than simply Grid Interactive You may hear these referred to as Smart Inverters or Advanced Inverters

7 What does UL 1741 SA test? Mandatory Anti-Islanding Low/High Voltage Ride Through Low/High Frequency Ride Through Ramp Rate Specified Power Factor Volt/Var mode Optional (Depends on SRD) Frequency Watt Volt Watt

8 Why is this needed? Grids are facing higher penetration rates of PV, and in some cases, saturation Existing UL 1741 standards had very strict thresholds for operation and shutdown Imagine cases with high PV penetration and Intermittent clouds (Ramp Rate) Aging transformers (VRT) Afternoon confluence of higher loads and PV dropping offline (VRT and FRT) Source: SolarEdge

9 Source: Outback Power UL vs. Rule 21 vs. 14H

10 Examples of Grid Support Features

11 Source: SolarEdge Low/High Frequency Ride-Through

12 Source: SMA Voltage Ride-Through

13 Volt-Var Mode Grid voltage nominal, purely active power 2. Grid voltage high, add inductive reactive power 3. Grid voltage low, add capacitive reactive power Source: SMA Adjusting VArs keeps grid voltage from oscillating; acts like a shock absorber Intended result is automatic stabilization of grid voltage

14 Ramp Rate (Normal and Soft Start) Power Gradient These parameters define how the inverter will gradually ramp up to the preset active and reactive power during: Normal Operation Soft Start Defined as a % of I nom / Second Source: ABB

15 Frequency Watt (Optional by SRD) Support grid frequency by changing inverter wattage output 1. Grid frequency nominal, inverter at max output 2. Grid frequency high, inverter curtails power 3. Grid frequency low, inverter increases power if available Source: SolarEdge

16 Which inverters are compliant? Company Product Expected Date of Certification AEE Availability Enphase IQ US Certified Now Available Now Enphase IQ6PLUS-72-2-US, IQ6PLUS-72-5-US Certified Now Available Now Enphase IQ6-60-ACM, IQ6PLUS-72-ACM Certified Now Available Now Fronius Primo ; 5.0-1; 6.0-1; ; Certified Now Available Now Primo /240; ; ; ; Fronius Symo /240; /240 Expected date of cert Oct 2017 Available Now Fronius Symo Expected date of cert Oct 2017 Available Now Fronius Symo ; ; ; ; ; Certified Now Available Now SolarEdge SE3000A-US/ 3800/ 5000/ 6000/ 7600/ 10000/ Certified Now Available Now SolarEdge SE3000H-US/ 3800/ 5000/ 6000/ 7600 Certified Now Available Now SE9KUS, SE14.4KUS, SE10KUS, SE20KUS, SolarEdge SE33.3KUS Certified Now Available Now SMA SB3.0-1SP-US-40/3.8/5.0/6.0/7.0/7.7 Certified Now Available Now Outback Radian/VFXR/FXR Certified Now Available Early September Ginlong Solis-1P3k-4G-US-SA/3.6/4.6/5/6/7/7.6/8/9/10k Certified Now Available Now PVI-3.0/3.6/3.8/4.2; PVI-5000/6000; UNO- ABB 7.6/8.6; UNO-DM-PLUS-3.0/3.6/3.8/4.2/5.0 Certified Now Available Now

17 Where can I learn more? CEC Approved Inverter List Hawaii Approved Inverter List Calseia compliance list CPUC Rule 21 page UL 1741 SA Webinar made by UL NREL White Paper

18 Questions? Joshua Brister Sr. Manager, Product Management and Technical Sales

19 Appendices

20 Rule 21 Rollout Phase 1 Autonomous Control Effective 9/8/2017 Phase 2 Communications (SEP 2.0) Required Expected in 2018 Phase 3 Interoperability Signalling from utility, etc. NOC required No timeline