2015 tpl short circuit scope - southwest power pool tpl short...2015/03/18 · 2015 tpl short...
TRANSCRIPT
2015 TPL
Short Circuit Scope
Engineering TWG approved on 3/18/2015
2015 TPL Short Circuit Scope 1
Revision History
Date or Version
Number
Author Change Description Comments
12/30/2014 SPP Staff Initial Draft
2/10/2015 SPP Staff Update based on the February
TPLTF meetings
3/6/2015 SPP Staff Update based on member
feedback
3/9/2015 SPP Staff Update based on the March 9th
TPLTF meeting
2015 TPL Short Circuit Scope 2
Table of Contents
Revision History ...........................................................................................................................................1
Overview .......................................................................................................................................................3
Data inputs ....................................................................................................................................................4
Modeling data ..................................................................................................................................4
Data required by the PC ...................................................................................................................5
Initial Data request ................................................................................................................................... 5
Subsequent Data request .......................................................................................................................... 5
Short Circuit Simulation .............................................................................................................................6
Analysis............................................................................................................................................6
Software parameters.........................................................................................................................6
Deliverables ..................................................................................................................................................7
Assessment Distribution ..............................................................................................................................8
Schedule ........................................................................................................................................................9
Changes in Process and Assumptions ........................................................................................................11
2015 TPL Short Circuit Scope 3
Overview
This document presents the scope and schedule of work for the NERC TPL-001-4 Short Circuit
Assessment. This document will be reviewed by the Transmission Planning Task Force (TPLTF),
Transmission Working Group (TWG), and the applicable functional entities as described in NERC
TPL-001-4, A.4.1. SPP, as the Planning Coordinator (PC1), will coordinate with the Transmission
Planners (TP) to exchange data. The assessment begins in January 2015 and is a 12-month study
scheduled to be finalized by December 2015.
1 In this document, SPP does not represent a TP.
2015 TPL Short Circuit Scope 4
Data inputs
Modeling data
Modeling data required in the TPL Steady State study is incorporated through the annual SPP
MDWG model building process. The SPP MDWG model building process is performed in
accordance with the applicable NERC Modeling, Data, and Analysis (MOD) Standards. In order to
meet the R1 requirements, the models must represent the following:
Existing Facilities
Known outage(s) of generation or Transmission Facility(ies) with a duration of at least
six months
New planned Facilities and changes to existing Facilities
Real and reactive Load forecasts
Known commitments for Firm Transmission Service and Interchange
Resources (supply or demand side) required for Load
However, these requirements are not applicable in determining the interrupting capability of circuit
breakers required for Faults for all system conditions. The System short circuit model with all
planned generation and Transmission Facilities in service is represented with the following
additional requirements:
Place all available facilities in-service:
o Generation
o Transmission lines (Out for maintenance)
o Transformers
o Buses
Flat – classical fault analysis conditions
The model set in the table below establishes category P0 as the normal System condition in TPL-
001-4 Table 1, and defines the models that will be used for the 2015 TPL short circuit analyses.
These models were chosen to comply with requirement R2.3
Requirement Description Study case
R2.3 Year 1 Maximum Fault Short Circuit MDWG 2016S
2015 TPL Short Circuit Scope 5
Data required by the PC
Initial Data request
There is not an initial data request for ASCC results, because the PC will run a short circuit analysis
on all buses in the short circuit model within the PC footprint.
For TPs that require ANSI Fault Current calculation, each TP will provide to the PC the following
ANSI Fault Current Calculation parameters to be used for each bus within the TP area:
Divisors
o For branches in positive sequence
o For machines in positive sequence
o For branches in zero sequence
o For machines in zero sequence
Fault multiplying factors
o DC decrement only or AC and DC decrement
Max operating voltage, in PU
Contact parting times, in seconds
Subsequent Data request
Corrective Action Plans for instances where the short circuit current interrupting duty exceeds the
equipment rating.2 Use of Activity ANSI requires a second step involving line-out cases if the full
bus-fault current exceeds the interrupting capability of the breaker under review. The TP will
provide a listing of each bus number for which a line-out analysis is required for Activity ANSI to be
performed by the PC.
2 R2.8
2015 TPL Short Circuit Scope 6
Short Circuit Simulation
Analysis
The PC will send out the total Bus fault current study results for SLG and 3 phase faults to the TPs.
Full bus-fault current and line-out results using ASCC
Full bus-fault current using ANSI
o Line-out results for buses provided in subsequent request
The TPs can perform their own short circuit analysis in lieu of the PC provided results. The TP will
evaluate the results and respond to the PC with necessary Corrective Action Plans (CAPs) based
upon TP analysis/feedback and subsequent data request for the required ANSI line-out results. The
PC will verify the validity of the TP submitted CAPs.
Software parameters
PSS/E settings:
Run activity FLAT
o Set classical Short Circuit Assumptions (activity FLAT,CL)
Set Tap Ratios to unity (1.0)
Set Charging to zero (0.0)
Set Shunts to zero (0.0) in all sequences3
Use Automatic Sequence Fault Calculation (ASCC) function
o Three phase fault
o Line to Ground (LG) fault
o Line Out (LOUT) fault
o Impose flat conditions
o I”k contributions to “N” levels away
N=0
Use ANSI Fault Current Calculation (with defaults below unless alternate provided by TP)
o Divisors
For branches in positive sequence = 40.0
For machines in positive sequence = 80.0
For branches in zero sequence = 40.0
For machines in zero sequence = 80.0
o Fault multiplying factors = DC decrement only
o Output Format = Summary output using ANSI R and X
o Max operating voltage, in PU = 1.05
o Contact parting times, in seconds = 0.033
Short Circuit Output = Physical
Short Circuit Coordinates = Polar
Short Circuit Parameters = 3 Phase
3 Set line shunts to 0.0 in the positive (and hence negative) sequence, and fixed and switched shunts to 0.0 in all three
sequence networks.
2015 TPL Short Circuit Scope 7
Deliverables
Initial submittal of total Bus Fault Currents from PC to TPs in an Excel format
o Full bus-fault current and line-out results using ASCC
o Full bus-fault current using ANSI
Subsequent submittal of line-out Bus Fault Currents using ANSI from PC to TPs in an Excel
format
Draft TPL-001-4 Short Circuit Assessment
Final Comprehensive TPL-001-4 Assessment
2015 TPL Short Circuit Scope 8
Assessment Distribution
Each Planning Coordinator and Transmission Planner shall distribute its Planning Assessment
results to adjacent Planning Coordinators and adjacent Transmission Planners within 90 calendar
days of completing its Planning Assessment, and to any functional entity that has a reliability related
need and submits a written request for the information within 30 days of such a request. 4
If a recipient of the Planning Assessment results provides documented comments on the results, the
respective Planning Coordinator or Transmission Planner shall provide a documented response to
that recipient within 90 calendar days of receipt of those comments.5
SPP Adjacent Transmission Planner PSS/E Area Number Contact email Cleco Corporation 502 TBD
Entergy 351, 327 TBD
Ameren Services Company 356 [email protected]
Saskatchewan Power Corporation 672 [email protected]
Otter Tail Power Company 620 TBD
Minnkota Power Corporation TBD TBD
MidAmerican Energy Corporation 635 TBD
Great River Energy 615 TBD
City of Ames Electric Services TBD TBD
Central Iowa Power Cooperatives TBD TBD
Xcel Energy 600 TBD
Alliant Energy West 627 TBD
DPC 680 TBD
Montana-Dakota Utilities 661 TBD
SPP Adjacent Planning Coordinator Contact email Associated Electric Cooperatives, Inc. (AECI) [email protected]
Mid-Continent Area Power Pool (MAPP) [email protected]
Midcontinent Independent System Operator
(MISO)
4 R8 5 R8.1
2015 TPL Short Circuit Scope 9
Schedule
Owner Study Scheduled Activities Dates
PC SS Steady State Scope Development Thu , January 1
PC ST Stability Scope Development Thu , January 1
PC SC Short Circuit Scope Development Thu , January 1
MDWG SS Contingency data request Fri , February 27
MDWG SS 2015 MDWG Powerflow model set approval Mon , March 2
MDWG SC 2015 MDWG Short circuit model set approval Mon , March 2
PC SS Generate basecase 'P0' potential violations Tue , March 3
PC SS Send TPs basecase 'P0' potential violations Fri , March 13
PC SS BES inclusion list and spare equipment data request Mon , March 16
TWG SS,SC,ST TWG Scope Approvals Wed , March 18
TP SS Deadline for providing ‘P0’ basecase CAPs Thu , March 26
TP SS Deadline for providing Contingency data (P1) Fri , March 27
PC SS Deadline for applying basecase CAPs Mon , March 30
TP SS Deadline for providing BES inclusion list, spare equipment Mon , March 30
PC SC Perform SC simulation Wed , April 1
MDWG ST Contingency data request Wed , April 1
TP SS Deadline for providing Contingency data (P2,P4,P5,P7, EE) Mon, April 27
PC SS Perform POM-OPM ACCC runs Tue , April 28
PC SS Organize POM-OPM ACCC results Wed , May 27
PC SS Send initial potential violations to TPs and request CAPs Tue , June 30
PC SS Verify TP submitted CAPs upon reception Wed, July 1
PC SC Send Short Circuit results to TPs and request CAPs Wed , July 1
TP SS Begin Stakeholder meetings to shed NCLL Mon , July 13
TP SS Deadline for providing Protection Scheme Contingencies Fri , July 31
TP SC Deadline for providing listing of buses for line-out results
using activity ANSI
Mon , August 3
PC SS Send additional potential violations to TPs and request CAPs Fri , August 7
TP SS Deadline for providing CAPs Fri , August 14
MDWG ST 2015 MDWG Dynamic model set approval Thu , August 20
TP SC Deadline for providing CAPs Mon , August 31
PC ST Complete Fast Fault Scans for Dynamics Mon , August 31
PC SC Send Short Circuit simulation results for line-out results using
activity ANSI to TPs and request additional CAPs
Mon , August 31
TP SS End Stakeholder meetings to shed NCLL Wed , September 16
TP SC Deadline for providing additional CAPs for Short Circuit
simulation results for line-out results using activity ANSI
Wed , September 16
TP ST Deadline for providing Contingency data Mon , September 21
2015 TPL Short Circuit Scope 10
PC SC Complete verification of TP submitted Short Circuit CAPs Thu , October 15
PC SS Complete verification of TP submitted Steady State CAPs Thu , October 15
PC ST Complete Dynamics Stability Analysis Wed , October 21
PC SS Begin Drafting Steady State TPL Assessment Fri , October 16
PC SC Begin Drafting Short Circuit TPL Assessment Fri , October 16
PC ST Begin Drafting Stability TPL Assessment Fri , October 16
PC SS,SC,ST Post Draft TPL Comprehensive Assessment to TWG Tue , November 10
TWG SS,SC,ST TWG approval of 2015 Comprehensive TPL Assessment Wed, December 9
2015 TPL Short Circuit Scope 11
Changes in Process and Assumptions
In order to protect against changes in process and assumptions that could present a significant risk to
the completion of the TPL study, any such changes must be vetted. If TWG votes on any process
steps or assumptions to be used in the study, those assumptions will be used for the 2015 TPL study.
Changes to process or assumptions recommended by stakeholders must be approved by the TWG.
This process will allow for changes if they are deemed necessary and critical to the TPL study, while
also ensuring that changes, and the risks and benefits of those changes, will be fully vetted and
discussed.