Slide 1: Distributed Generation Technical Interconnection Requirements: Amendments Part II
DISTRIBUTED GENERATION TECHNICAL INTERCONNECTION REQUIREMENTS: AMENDMENTS PART II
Slide 2: Agenda
Agenda • Introduction • Amendment Proposals – Transformer Connections. TIR :Section 2.1.12 Page 40 – DG Interconnection to 3-Wire Distribution Systems. TIR :Section 2.1.12.2 Page 51 – Utility Grade Relays. TIR: Section 2.3.1 Page 78 – Mandatory Protections. TIR: Section 2.3.1,2.3.5 and 2.3.6 Page:78
Slide 3: Introduction
Introduction • Distributed Generation Technical Interconnection Requirements (TIR) • First published - November 2009 • Revision 1 published - February 2010 • Further amendments will be presented today based on Industry standards, experiences, interaction with generation proponents 3
Slide 4: Transformer Connections: Section 2.1.12, Page 40
Transformer Connections: Section 2.1.12, Page 40 • Amendments Proposal – The clause allowing for transformer configurations other than the ones shown is removed – Additional wording is added to the 3-wire connections to show the most common connection chosen by DG Owners – Diagrams 2 to13 have been
Slide 5: Only Configurations Shown in Diagrams 2 to 13 will be Accepted
Only Configurations Shown in Diagrams 2 to 13 will be Accepted • Item 2.1.12 (iv) was removed to not allow any additional configurations which are not shown in the diagrams in the TIR document 5
Slide 6: Text to be changed in the TIR Document
[Text to be changed in the TIR Document 2.1.12 INTERCONNECTION TRANSFORMER CONFIGURATION iv) The DG Owner shall ensure that there is no back feed from the DGIT when the generator is out of service and shall be responsible for all consequences resulting from such back-feeds. v) The DGIT may supply un
Slide 7: Text to be changed in the TIR Document (continued)
hyd rg vi) Items (i), (ii), and (iii), and-444 apply to all DG Facilities connecting directly to HONI's Distribution System or indirectly through a hybrid feeder. vii) Items (i), (ii), and (i), and-4¥4 may apply to DG Facilities connecting indirectly to HONI's Transmission or Distribution System thr
Slide 8: DG Interconnection Transformer Configuration Diagram Changes
DG Interconnection Transformer Configuration Diagram Changes • Figures 2 to 8 of TIR -- revised to remove the optional fuse on the High Voltage side and the grounding transformers on the Low Voltage side of the DG Interconnection Transformer • Some diagrams have some minor revisions in the notes and
Slide 9: DG Interconnection Transformer Configuration Diagram Changes
DG Interconnection Transformer Configuration Diagram Changes Fuse: The “optional fuse” on the High Voltage side removed on all diagrams to eliminate some confusion with respect to it’s function and placement. Low voltage grounding transformer: Grounding Transformer removed from the low voltage side
Slide 10: Revised Diagram
Revised Diagram HONI’s HVI Utility feed HONI’s HVI Utility feed ABC tility feeder ABC ity feeder N 4-Wire N 4-Wire PCC Pcc ee tereeeennenenes ad ciel . {A second station service ‘A second station service $ may be it may be considered # Motorized » > sotino sonoty corsity is Motorized » Sores nay Sav
Slide 11: Revised Diagram
Revised Diagram HONI's HVI HONI’s HVI a Utility feeder ABC Utility feeder ABC y N 4-Wire N 4-Wire » » PCC ee peveceeeecensee . cee ee ee ewe we we we wd ow we * A second san seen A second ston sr Motorized NS th fone We Motorized N Y anatase i Disconnect " Disconnect available Fuse © M Switch (69) S
Slide 12: Revised Diagram
Revised Diagram HONI's HVI ABC Utility feeder N 4-Wire Motorized Disconnect 7 M| Switch (89) Fuse Led Brook Sutch 6, Fuse HVI 52 HVGT RAK “ Wye 3 ] Dt I! — a -1 afore l | | LvcT! LS | | LV may be ungrounded | | | 52) |LvI Auxiliary Essential Loads Load Xgn * may be required — To be determined by DG
Slide 13: Revised Diagram
Revised Diagram HONI's HVI Utility feed HONI’s HVI LUttty feed ABC ility feeder ABC ility feeder N 4-Wire N 4-Wire PCC seceeeeeee . -- ‘A second station verde ‘A second station service i maybe e W Motorized ee ee vars Motorized pura ney chara Disconnect avaiable ___ Disconnect avaliable M| Switch (8
Slide 14: Revised Diagram
Option #5: Delta;wye DGIT Also applies to single interface transformer connections Revised Diagram ? HONT' my HONI's HVI Utility feeder ona Hi Utility feeder [ 52 pee | 7) } AB N 4-Wire N 4Wire PCC Pcc Motorized Motorized Disconnect Disconnect i M| Switch (89) Switch (89) HVI ; 52 HVGT Essential Loa
Slide 15: Revised Diagram
Revised Diagram HONI's HVI Utility feeder HONT's HVI Utility feeder ABC ABC N 4-Wire N 4-Wire PCC — LE _ _ _ fb _ PCC “Motorized Disconnect F M| Switch (89) Guse,. Load Break Switch I ' ! i LED | rv ~ Optional 2 T1 xn LL 4d = | pee | a ‘FG wye Maybe —~ “‘ wye Maybe —~ required required 52) | Lv! LVI
Slide 16: Revised Diagram
Revised Diagram HONI's HVI i _ Utiity feeder CL sae Utiity feeder 4-Wire N 4-Wire N Pcc Pcc ee ee es ee = ee en | Existing critical load | [ Existing critical load | | facility* | | facility* | | | | | | | | Motorized add HVGT | Motorized add HVGT | | Disconnect for new | | Disconnect for new Switch
Slide 17: DG Interconnection to 3-Wire Distribution Systems: Section 2.1.12.2, Page 51
DG Interconnection to 3-Wire Distribution Systems: Section 2.1.12.2,Page 51 • Amendments Proposal – Hydro One 3-wire system – mainly operating at 44 kV with one or two feeders operating at 27.6 kV - is rated and designed for ungrounded operation – This system supplies three-wire loads only with no s
Slide 18: Summary of Changes
• Summary of Changes In section 2.1.12.2 – Removal of HV-grounded interface transformer configuration options – Removal of requirements for acceptable HV Grounding transformers (item ii) – Removal of requirements for grounded transformer HV interrupter (item iii) – Removal of reference to general gr
Slide 19: Changes to be Made in TIR Document
hyd rg Changes to be Made in TIR Document Section 2.1.12.2 DG INTERCONNECTION TO 3-WIRE DISTRIBUTION SYSTEMS i) The DG Facility shall connect to HONI's 3-VVire Distribution System through the following: Delta:wye DGIT as shown in Figure 9; 19
Slide 20: Revised Diagram
Revised Diagram HONI’s HVI ops HONI's HVI -" ABC Utility feeder ABC Utility feeder PCO i. < POC a eesseen . —T [A second station service T ‘A second station service may be considered if may be considered if another feeder with ‘another feeder with Genuine supply diversity genuine supply diversity Mo
Slide 21: Utility Grade Relays Section 2.3.1, Page 78
Utility Grade Relays Section 2.3.1, Page 78 •Amendments Proposal – A new clause will be added in Section 2.3.1 – all protection relays have to be of a “Utility Grade” standard and reference applicable standards – will ensure that only relays which have been designed and tested to this standard are u
Slide 22: Clause to be added in TIR under Section 2.3.1
•Clause to be added in TIR under Section 2.3.1 • Protection relays shall be “utility grade” and shall meet the minimum requirements specified in IEEE C37.90, “Standard for Relays and Relay Systems Associated with Electrical Power Apparatus,” latest addition as well as meet the requirements in Sectio
Slide 23: Mandatory Protections Section 2.3.1, 2.3.5 and 2.3.6
Mandatory Protections Section 2.3.1, 2.3.5 and 2.3.6, Page: 78, 82 - 84 • Amendments Proposal – Existing TIR is not clear in emphasizing the fact that the minimum protection requirements for single phase and three phase generators are mandatory. – Cannot be implemented as part of the generator’s pro
Slide 24: Protection Requirements 2.3.1 General Requirements
Protection Requirements 2.3.1 General Requirements 24
Slide 25: 2.3.6 Three Phase Generators
hyd rg 2.3.6 THREE PHASE GENERATORS i) Three Phase DG Facilities shall have the minimum protection requirements as shown below in Table 10,_and are mandatory for all generators to which this TIR document is applicable, 25
Slide 26: Breaker Failure Protection Section 2.3.4, Page 80
Breaker Failure Protection Section 2.3.4, Page 80 • Amendments Proposal – Motorized Disconnect Switch shall be defined in Section 1.8 “Terms and Definitions” – Section 2.3.4 Item (iii)(a) shall be modified as shown below for additional clarity – Section 2.3.4 Item (vii) shall be modified to ensure c
Slide 27: Proposed Text in the TIR Document
hvdro@W yaro one Proposed Text in the TIR Document 2.3.4 BREAKER FAIL (BF) iil) In the event of a HVl breaker fail condition, the breaker fail protection shall: a) Trip the next zone at the DG facility, specifically the upstream Isolation device and all LV breakers shall be tripped; and vil) In the
Slide 28: Protection Diagrams: Section 2.3.5, 2.3.6, Page 82
Protection Diagrams: Section 2.3.5, 2.3.6, Page 82 • Amendments Proposal – Modify and update Table 10 shows the minimum interconnection requirements – The appropriate sections of the text are also now referenced – Update interconnection protection figures - to be consistent with Table 10 – Focus is
Slide 29: Table 10: Typical Interconnection Protections for Three Phase DGs
Table 10: Typical Interconnection Protections for Three Phase DGs Function . : : 1 . 2 . Requirement Protection Element function Device # Synchronous Induction Inverter Section Over-Voltage Trip 59 Required Required Required 2.3.11, . . . Under-Voltage Trip 27 Required Required Required 2.3.12 iii)
Slide 30: Revised Diagram
Revised Diagram Utility feed = ty feeder Utility feeder Fi ° N“* 4-Wire N? 4Wire FUSE/69 FUSE/89 WAST rye = —| £903 - 50 — 51 —21° = 27 = 59 —810—81U— Al* Lvl ®) 25 LVI Lvi Load Single Phase Generator be ~citonal Anti-Islanding Protection May Be Sinale Phase Generator ** Connection may be phase-phas
Slide 31: Revised Diagram
Revised Diagram [= } Utility feeder [2 | Utility feeder FA i N 4-Wire N DGEOM.SBS ceeepeeeeeeneneeeefeneeceeeeneeeeeeeee feet oneee Pec WY Motorized . Disconnect Isolation I) M| Switch (89) Device Fuse ver * S Fuse DGEOM.SBS ‘ gs Interconnection Protection” wa (67 KN p—f-- Sesiantisianing Pein BB _‘
Slide 32: Revised Diagram
Utility feeder N 4-Wire Motorized ‘ >) sare cape ewes Disconnect _— Mi) Switen (89) : Loot Breed Bu 5 Fuse ww 67 47° = 27 = 59 =810-81U 67N 3E v 2 orf] a HVI ’ 3VTs — — be- 67 — 21 }67N-21N 5 - p— sin Station Service ‘ i DAN am Delta oo (YVY\ 87 Tertary = Optional | Fe ition: 3€ 3VTs a 50 — 51 = 52
Slide 33: Revised Diagram
Utility feeder 4-Wire Motorized Disconnect Fuse dM Switch (89) lp 47? - 27 ~ 59 -810-81U —T—T1 pe G7 = 21 6E7N~21N /-— 51N rhe f Station Service WAY 87 ) Optional oa rryyy" 3VTs pe— 50 — 51 — 32 - 46 -}-SON-SIN Acdiponal Aen-Istandng Protection 1VT May Be Requred LYGT” gel go wi 25 a VW Lvl Essentia
Slide 34: Revised Diagram
Revised Diagram 2 | Utility feeder Utility feeder 4-Wire 4-Wire N PCC Es NY ~ 0 Motorized peared a Disconnect M | Switch (89) Fuse a nt rs i (2) | LG nm (ae -e Ash S Fuse 4 -4 i : f ave Ant-istnaing Protecton Extended Antitncing Prtecton ** «67 | | 27 | 59 (81 81 47 81R)| 78 . 67N ; ** — 472 m)- 27
Slide 35: Revised Diagram
Utility feeder N 4-Wire (Dense mupehy ctor be Motorized Disconnect = M * S Fuse a q fo 67 = 21 SHETNH21N Station Service WAN HVGT 51N (vYY) Pa pV pot tional Op 47 = 27 = 59 =810—81U 46 — 32 -}50N-51N Additonal Act-tstending Protection May Be Required 3 Wy aT uw | i Essential Loads (s) 4-Wire Connect
Slide 36: Revised Diagram
Revised Diagram [22 } Utility feeder 4-Wire N ’ Isolation YW Device r 2 nen 5 ~— ~~ “interconnection Protection’ - | Basic Antisancing Protection «-BB_—C«ExtendeAtalancing Protection | 2¢ , 5 . 3vts || (27)(s9)(810) (atu) (47 )e1R) (78 | BF! HVI' | tA oa A los LS (50 )(51 (67?) (21?) 46 32R)—67N?-21
Slide 37: Revised Diagram
Revised Diagram [2 | Utility feeder por wae {avaiable Isolation A __ Device DGEO/LSBS Basic Anstarcing Prtcton } | @O@S ORO |_ jeaeeeeeeee Tnterconnection Protection Extended Antisandng Protection Unbalano Protection DGIT / HVGT zone Protection? zB why G (vYY 4 | Station Seruse - DG LV q Protection
Slide 38: Revised Diagram
Motorized Disconnect ‘Switch (69) ovr La OP s 88 | \(27N) 59N ~3 2]. = re }— or - 21 sal (47 WAS SIN 27 = 59 810-1) | Station Service PA pS 10-61 ar 3VTs ~ Optional Ps po— 50 — 51 46 — 32 = SON~5IN 4 avr iene eation BF] 52 3¢ | [=] - wi l tui ui | tT TWh Essental Loads Lond (s) 3-Wire Connection - O
Slide 39: Utility feeder
Utility feeder ne | A vec water wore rayte connec? caatet cet ow coves var realy @ Motorized Disconnect M | Switch (89) S Fuse al 0-4 * 4774 27 = 59 48104810 as 3¢ ’ 51N Lahey Station Service ” WOCN) 87 = (vYY. Optional qo 50 = 51 = 32 = 46 4} SO0N=51N Addbonal Aob-Isianding Protecten 1vT May Be Reg
Slide 40: Power Quality Recording Requirements: Section 2.6.2, Page 129
Power Quality Recording Requirements: Section 2.6.2, Page 129 • Amendments Proposal – Change shall be made to section 2.6.2 to change the threshold limit for power quality recording requirement from greater than or equal to 250 KW to greater than 250KW. 40
Slide 41: Existing TIR Section 2.6.2 (i) and Proposed Amendment
• In the existing TIR section 2.6.2 (i) reads: – Power quality recording shall be provided for facilities rated 250 KW or greater. • In the proposed amendment section 2.6.2(i) shall read: – Power quality recording shall be provided for facilities rated greater than 250 KW. 41
Slide 42: Amendments Summary
Amendments Summary TIR :Section 2.1.12,Page 40 Transformer Connections Amendments Proposal 1. The clause allowing for transformer configurations other than the ones shown is removed 2. Additional wording is added to the 3-wire connections to shown the most common connection chosen by DG Owners 3. Di
Slide 43: Amendments Summary – Cont'd
Amendments Summary – Cont’d TIR: Section 2.3.1, Page 78 Utility Grade Relays Amendments Proposal 1. A new clause will be added in Section 2.3.1 that will state that all protection relays have to be of a “Utility Grade” standard and reference applicable standards. TIR: Section 2.3.1,2.3.5 and 2.3.6,
Slide 44: Amendments Summary – Cont'd
Amendments Summary – Cont’d TIR: Section 2.3.4, Page 80 Breaker Failure Protection Amendments Proposal 1. Motorized Disconnect Switch shall be defined in Section 1.8 “Terms and Definitions” 2. Section 2.3.4 Item (iii) (a) shall be modified for additional clarity. 3. Section 2.3.4 Item (vii) shall be
Slide 45: Amendments Summary – Cont'd
Amendments Summary – Cont’d TIR: Section 2.6.2, Page 129 Power Quality Recording Requirements 1. Change shall be made to section 2.6.2 to change the threshold limit for power quality recording requirement from greater than or equal to 250 KW to greater than 250KW. 45
Slide 46: Feedback Process
Feedback Process • Additional questions and/or feedback regarding the TIR Amendments will be accepted for a period of one week • Please use the following e-mail address to communicate your comments DGConnectionReq@HydroOne.com 46
Slide 47: Follow up Webinar on Amendments
Follow up Webinar on Amendments • Depending on the Questions/Comments, Hydro One will hold one more webinar on the TIR amendments • Will include Review of any important or clarifying questions/comments from today’s webinar 47
Slide 48: Questions?
Questions? We will answer questions only on today’s Webinar - TIR Amendments For questions outside of the scope of the Webinar, please contact your local Hydro One Account Executive or email your question to DGConnectionReq@HydroOne.com 48