1 / 13

Relay Modeling, a response to 2011 Arizona to California Outage

Relay Modeling, a response to 2011 Arizona to California Outage. Tracy Rolstad July 2013. N Gila— Hassayampa (15:27:39) . 37 sec. New Solution ? Extended Term Dynamics?. Direct Response of MSRASTF. What happened during the 2011 outage? Overcurrent functions Distance Relays So…

lark
Télécharger la présentation

Relay Modeling, a response to 2011 Arizona to California Outage

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Relay Modeling, a response to 2011 Arizona to California Outage Tracy Rolstad July 2013

  2. N Gila—Hassayampa (15:27:39) 37 sec New Solution ? Extended Term Dynamics?

  3. Direct Response of MSRASTF • What happened during the 2011 outage? • Overcurrent functions • Distance Relays • So… • Overcurrent relays are first • Well understood • Informal survey indicates there are not that many • Compared to distance devices

  4. Fall 2012 Assessment • Only PTI TIOCR model existed • “Curve” based input • Discussion with software suppliers… • GE created LOCTI by December 2012 (Yay!) • “Curve” based input • PowerWorld creates TIOCRS model (March 2013) • “Standard” equation based input • Behind the scenes just a curve

  5. Standard Curves for TIOCRS • TIOCRS (note “standard” inputs)

  6. LINE RELAY MODELS AVAILABLE

  7. Present State of the Art • TIOCR • LOCTI • TIOCRS • All of these work as expected • Of marginal use in transient stability (depends on settings) • Rather useful in power flow • Now imported into PowerWorld power flow

  8. Parameter Data Gathering • System Planning does not have access to parameters • Collaboration with the Protection Group to access data • The Protection Group supplied excel spreadsheet with the requested data – queried from database held in PowerBase program (an Avista experience) • Difficulty: relating database nomenclature with simulation nomenclature • Best approach may be by hand – automated relationship database hard to develop (depending on form of data from Protection Group)

  9. MVWG Action Taken • Approve the Requirements AND the Models • TIOCR • LOCTI • TIOCRS

  10. Software Provider Action • Interoperability of WECC approved models is key • Generally speaking a curve based over current relay model is available is at least three softwares used in WECC • Investigation needed as to PowerTech, V&R, etc • Action is needed to accommodate the equation based input over current relay

  11. Next Steps (working on this) • All inclusive distance relay • Combines “best of” features of existing technology • “Feels like” a merging of ZPOTT and DISTR1 • Contains a discrete transfer trip function • Can turn OFF trip function to model communication failure • Has fault detection/low current inhibition • Has the “far end branch” defined for the purposes of ease of use. • Can Ignore/Report/Report & Trip • Contains standard distance elements of usual shapes • 3 zones, blocking shapes, mho circle, etc

  12. Assessment • We are behind the proposed timeline. • 2014 dynamics data submission will contain over current relays. • Likely 2015 will be the distance relays. • Non positive sequence based relay model is at least 2 years out • Which is ok since the form of the functionality needs to be exercised in the 3 phase fault/positive sequence world first.

  13. Parking Lot for Over Current Relays • We CAN make things better… • Add directionality to existing over current relay models • Conversations with vendors indicates this is straight forward • Add flag for power flow direction • 0 ignore power flow direction • 1 power flow direction must be in same direction of relay defined direction (i.e. From/To definition) • -1 power flow must be in opposite direction of relay defined direction (i.e. From/To definition) • Hope to have this happen concurrent with 2014 data submissions.

More Related