Eversource Energy (d/b/a) · NYSE:ES
Eversource Energy (d/b/a) — ISO New England — Technical Presentation (February 2018)
40 slides from Eversource Energy (d/b/a)'s technical presentation, Feb 14, 2018
Slide 1: Implementation of the Revised IEEE Standard 1547
FEBRUARY 14, 2018 | WESTBOROUGH, MA Implementation of the Revised IEEE Standard 1547 Planning Advisory Committee David Forrest ISO-NE PUBLIC
Slide 2: Purpose
Purpose • Provide an update on standards impacting interconnection of distributed energy resources (DER) • Discuss the need for DER performance that supports the reliability of the Bulk Electric System • Discuss interim steps that will improve DER performance ISO-NE PUBLIC 2
Slide 3: Key Points of Presentation
KEY POINTS OF PRESENTATION ISO-NE PUBLIC 3
Slide 4: Key Points
Key Points • As New England adds significant amounts of Distributed Energy Resources (DER), it is essential for these resources to be interconnected in a way that does not adversely impact the reliability of the Bulk Electric System (BES) • The revision to IEEE Standard 1547 (Standard for Interconne
Slide 5: Background
BACKGROUND ISO-NE PUBLIC 5
Slide 6: The ISO Engaged Stakeholders on DER Standards
The ISO Engaged Stakeholders on DER Standards ISO-NE continues to be involved in discussions of the need for DER to support the reliability of the BES • May 16, 2012: Planning Advisory Committee (PAC) meeting • June 20, 2013: PAC meeting ISO-NE has initiated • September 30, 2013 Distributed Generati
Slide 7: Role of IEEE in Setting Interconnection Standards
Role of IEEE in Setting Interconnection Standards • The Energy Policy Act of 2005 requires electric utilities to provide interconnection services “based on standards developed by the Institute of Electrical and Electronics Engineers: IEEE Standard 1547 for Interconnecting Distributed Resources with
Slide 8: Bulk Electric System Planning Criteria
Bulk Electric System Planning Criteria • ISO-NE is required to plan for the contingency loss of resources (including DER) for conditions included in planning criteria mandated by NERC and NPCC • Planning criteria require that the transmission system remain secure for a permanent three-phase fault wi
Slide 9: Bulk Electric System Planning Criteria, cont.
Bulk Electric System Planning Criteria, cont. • Planning criteria also require analysis of a three-phase fault with delayed clearing – Delayed clearing of a three- phase fault on the 345 kV system is approximately 0.1-0.2 seconds – Delayed clearing of a three- phase fault on a the 115 kV system can
Slide 10: Limitations on the Loss of Source
Limitations on the Loss of Source • Planning criteria for stability analysis require limitations on the amount of sources that be lost for a contingency • Historically, the concern has been large generators being disconnected or going unstable and tripping • Tripping of DER for a transmission fault
Slide 11: Effect on the New England System
Effect on the New England System • In a 12/16/13 stakeholder presentation, ISO-NE described its reliability concern that New England may lose significant amounts of DER due to transmission faults* – This presentation shows how a fault on the transmission system can cause low voltage over a large por
Slide 12: Concern at the NERC Level
Concern at the NERC Level • The North American Electric Reliability Corporation (NERC) has expressed increasing concern with the impact of DERs on BES reliability • In February 2017 NERC issued a report* “Distributed Energy Resources, Connection Modeling and Reliability Considerations” • NERC’s repo
Slide 13: Concern at the NERC Level, cont.
Concern at the NERC Level, cont. • NERC’s report also describes autonomous inverter functionalities that will be added to California’s technical operating standards in Rule 21 by the end of 2017 – Support anti-islanding to trip off under extended anomalous conditions – Provide ride-through of low/hi
Slide 14: ISO New England is Forecasting Significant Solar Growth
ISO New England is Forecasting Significant Solar Growth • The following three slides are from the Final 2017 PV Forecast* – Massachusetts accounts for more than 60% of of the projected PV MW – Massachusetts’ forecast is projected to more than double in the next decade • Each year the projections inc
Slide 15: ISO is Forecasting Continued Solar PV Growth Over the Next Decade
ISO is Forecasting Continued Solar PV Growth Over the Next Decade PV Nameplate MW ac Source: Final PV Forecast (April 2017); * Note: MW values are AC nameplate ISO-NE PUBLIC 15
Slide 16: Final 2017 PV Forecast
Final 2017 PV Forecast Nameplate Capacity, MWac Source: Final PV Forecast (April 2017); * Note: MW values are AC nameplate ISO-NE PUBLIC 16
Slide 17: PV Growth: Reported Historical vs. Forecast
PV Growth: Reported Historical vs. Forecast ISO Updates the Forecast Annually to Capture Policy Changes ISO-NE PUBLIC 17
Slide 18: Status of IEEE 1547 and UL 1741
STATUS OF IEEE 1547 AND UL 1741 ISO-NE PUBLIC 18
Slide 19: IEEE 1547
IEEE 1547 • IEEE 1547, IEEE Standard for Interconnecting Distributed Resources with Electric Power Systems, was originally issued in 2003 (1547- 2003). • In 2013, Amendment 1 was approved (IEEE 1547a) to allow ranges of settings for tripping distributed resources for abnormal voltage and frequency.
Slide 20: IEEE 1547, cont.
IEEE 1547, cont. • The approved revision to 1547 is undergoing final editing at IEEE and should be published by the second quarter of 2018 • Before DER can be certified as meeting the revised 1547, the testing standard 1547.1 must be revised • Work on 1547.1 is ongoing and will optimistically be com
Slide 21: UL 1741
UL 1741 • UL 1741 is the UL Standard for Safety for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources • The second edition was dated January 28, 2010 • UL 1741 was revised as of September 7, 2016 to incorporate the new supplement SA • U
Slide 22: Interim Solution
INTERIM SOLUTION ISO-NE PUBLIC 22
Slide 23: Interim Solution
Interim Solution • Because of the rapid growth of solar PV in New England and the timeline for full implementation of the revision to IEEE 1547, ISO-NE sought out an interim solution for obtaining ride-through for voltage and frequency variations • Inverters meeting the requirements of UL 1741 SA ha
Slide 24: Interim Solution, cont.
Interim Solution, cont. • The TSRG is an existing group tasked with addressing distribution interconnection issues • The TSRG includes representatives from utilities, developers, manufacturers and Massachusetts regulators • Over 60% of solar PV in New England is/will be installed in Massachusetts •
Slide 25: Interim Solution, cont.
Interim Solution, cont. • Development of inverter performance requirements and an implementation plan required addressing multiple issues – Transmission reliability – Distribution protection – Retaining maximum trip time – Anti-islanding protection – Conformance with the revised IEEE 1547 – Allowing
Slide 26: Interim Solution (developed with the MA TSRG)
Interim Solution (developed with the MA TSRG) • The Inverter Source Requirements Document of ISO-NE (ISO- NE SRD) contains additional details on the application of “Grid Support Utility Interactive Inverters” – Also posted with this PAC meeting’s materials – A Source Requirements Document can be use
Slide 27: Interim Solution (developed with the MA TSRG), cont.
Interim Solution (developed with the MA TSRG), cont. • All inverter-based solar PV projects greater than 100 kW, with applications submitted on or after March 1, 2018, are subject to the ISO-NE SRD • Inverter-based solar PV projects with applications submitted prior to the above dates are encouraged
Slide 28: Interim Solution (developed with the MA TSRG), cont.
Interim Solution (developed with the MA TSRG), cont. • ISO-NE will require the following frequency trip settings which are consistent with the allowable ranges of the revised 1547 and with NPCC requirements: Default Settings (b) Shall Trip Function Frequency (Hz) Clearing Time(s) OF2 62 0.16 OF1 61
Slide 29: Interim Solution (developed with the MA TSRG), cont.
Interim Solution (developed with the MA TSRG), cont. • The frequency trip settings will result in the following ride- through capability Frequency Range Minimum Time(s) Operating Mode (Hz) (design criteria) f > 62.0 No ride-through requirements apply to this range 61.2 < f ≤ 61.8 Mandatory Operation
Slide 30: Interim Solution (developed with the MA TSRG), cont.
Interim Solution (developed with the MA TSRG), cont. • ISO-NE will require the following voltage trip settings which are consistent with the allowable ranges in Category II of the revised 1547 Shall Trip Shall Trip Function Voltage (OV = Overvoltage UV = Undervoltage) (per unit of nominal Clearing T
Slide 31: Interim Solution (developed with the MA TSRG), cont.
Interim Solution (developed with the MA TSRG), cont. • The voltage trip settings will result in the following ride- through capability Voltage Range Range of Ride-through Time(s) Operating Mode/Response (p.u.) (min – max) V > 1.20 Cease to Energize N/A 1.175 < V ≤ 1.20 Permissive Operation 0.2 – 2.0
Slide 32: Next Steps
NEXT STEPS ISO-NE PUBLIC 32
Slide 33: Next Steps
Next Steps • ISO-NE will work with utilities and regulators in each state to implement the ISO-NE SRD – Having one SRD for all of New England will minimize developer’s costs – Having one SDR will simplify modeling DER in planning studies • ISO-NE will work with utilities to optimize the utilization
Slide 34: Questions
Questions —- = | a di A \O oo fi
Slide 35: Appendix
APPENDIX IEEE 1547 Categories For Response to Abnormal Conditions ISO-NE PUBLIC 35
Slide 36: IEEE 1547 Categories
IEEE 1547 Categories • IEEE 1547 is technology neutral and thus does not establish performance requirements for specific DER technologies • Instead, it defines three categories related to the response of DER to abnormal conditions that have different performance requirements • IEEE 1547 suggests tha
Slide 37: IEEE 1547 Category I
IEEE 1547 Category I • Category I is based on minimal bulk electric system reliability needs and is reasonably attainable by all DER technologies that are in common usage today • The disturbance ride-through requirements for Category I are derived from the German standard for medium voltage synchron
Slide 38: IEEE 1547 Category II
IEEE 1547 Category II • Category II covers all BES reliability needs and is coordinated with existing reliability standards to avoid widespread DER tripping for disturbances for which the bulk system generators are expected to remain connected • It is based on NERC Standard PRC-024 (generator freque
Slide 39: IEEE 1547 Category III
IEEE 1547 Category III • Category III provides the highest disturbance ride-through capabilities, intended to address integration issues such as power quality and system overloads caused by DER tripping in local Area EPS having very high levels of DER penetration • This category also provides increa
Slide 40: Sample Application of IEEE 1547 Categories
Sample Application of IEEE 1547 Categories DER Type Example of Applications Sample Category Engine land fill gas Category I Synchronous Generators small hydro Category I Synchronous Generators combined heat and power Category I Synchronous Generators self-generation Category I Inverters Sourced by S
ISO New England — Technical Presentation (February 2018) on 6ix