2015 rtp scope and process review october 21, 2014
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2015 RTP Scope and Process Review October 21, 2014. Outline. 2015 RTP: What’s New 2015 RTP Process 2015 RTP Timeline. 2015 RTP: What’s New. New TPL Standard TPL-001-4 will be in effect for 2015 RTP - PowerPoint PPT PresentationTRANSCRIPT
ERCOT PUBLIC10/21/2014 1
2015 RTP Scope and Process Review
October 21, 2014
ERCOT PUBLIC10/21/2014 2
Outline
2015 RTP: What’s New
2015 RTP Process
2015 RTP Timeline
ERCOT PUBLIC10/21/2014 3
2015 RTP: What’s New
New TPL Standard TPL-001-4 will be in effect for
2015 RTP
Scope of contingency definitions considered for the
RTP will be broadened to include all categories
applicable to TPL-001-4
Additional sensitivity cases and analysis will be
performed
ERCOT PUBLIC10/21/2014 4
2015 RTP: Impact of new TPL standards
New Off-peak (minimum load case) will be studied as
a base case along with the summer peak cases
New contingency categories, P0-P7 and extreme
events instead of A, B, C and D will be studied
Shunt devices to be considered as single element
contingencies
Open Line (one-end of the line) without a fault
Definition of second level contingency in G-1+N-1 expanded
to include Generators and Shunt devices
ERCOT PUBLIC10/21/2014 5
2015 RTP: Impact of new TPL standards
Non-consequential load shedding shall no longer be
an acceptable mitigation plan for the following
contingencies P2-2-Bus Section Fault (345-kV)
P2-3 Internal failure of non-bus tie breaker (345-kV)
P3-1 G-1+G-1
P4 – Stuck breaker of non-bus-tie breaker (345-kV)
P5 – Failure of non-redundant relay (345-kV)
Req. 3.3.1 of TPL-001-4 requires automatic tripping of elements
where relay loadability limits are exceeded post-contingency Until such ratings are added to the models a default limit of 115% will be
used for 345-kV elements and 100% will be used for elements below 345-
kV
ERCOT PUBLIC10/21/2014 6
2015 RTP: Impact of new TPL standards
New sensitivity cases will be studied for each of the base cases
The sensitivity case for 2015 RTP will be prepared to study the effect of reduced reactive resource capability
Short Circuit Analysis will be conducted on year 3 and 5 summer peak cases with all projects modeled.
ERCOT PUBLIC10/21/2014 7
2015 RTP: Other updates
Reserve margin of 2800 MW (instead of 1375 MW) will be used in the reliability cases to address G-1+G-1 conditions
Dynamic ratings will be applied in reliability analysis (in addition to the economic analysis)
TPs will be requested to identify generic equipment type which may take longer to replace; these will be studied as a first level contingency in N-1+N-1 test
ERCOT PUBLIC10/21/2014 8
2015 RTP Process
ERCOT PUBLIC10/21/2014 9
2015 RTP: Timeline (tentative)
Deliverable Date
RTP Scope Developed October 2014
RTP Scope Finalized December 2014
Data request to TSPs Completed January 2015
Initial Conditioned Cases Posted February 2015
Reliability Analysis Complete July 2015
Economic Analysis Complete August 2015
Draft Report Sent Out for TP review September 2015Final Report Published November 2015
ERCOT PUBLIC10/21/2014 10
Questions?
ERCOT PUBLIC10/21/2014 11
Contingency Categories
CategoryInitial
ConditionEvent
Load Shedding allowed? Category
under Old TPL> 300 kV
<= 300 kV
P0 System intact None N N Cat AP1-1
System intact
G-1 (generator) N N Cat B1P1-2 T-1 (transmission) N N Cat B2P1-3 X-1 (transformer) N N Cat B3
P1-4 S-1 (Shunt device including FACTS devices that are connected to ground) N N P1-5 DC N N Cat B4P2-1
System intact
Open Line (one-end of the line) W/O Fault N N P2-2 BS (Bus section fault) N Y Cat C1P2-3 NBTB (Internal failure of non-bus tie breaker) N Y Cat C2P2-4 BTB (Internal failure of bus tie breaker) Y Y Cat C2P3-1
G-1 + System Adjustment
G-1 (generator) N N
Cat C3
P3-2 T-1 (transmission) N NP3-3 X-1 (transformer) N N
P3-4 S-1 (Shunt device including FACTS devices that are connected to ground) N N
P3-5 DC N N
P4-1
System intactStuck Breaker of non-bus-tie breaker (NBTB) for the fault associated with
G-1 N Y Cat C6P4-2 T-1 N Y Cat C7P4-3 X-1 N Y Cat C8P4-4 S-1 N Y P4-5 BS N Y Cat C9P4-6 Stuck Breaker of bus-tie breaker (BTB) for the fault associated with BS Y Cat C9
P5-1
System intact Failure of non-redundant relay for the fault associated with
G-1 N Y Cat C6P5-2 T-1 N Y Cat C7P5-3 X-1 N Y Cat C8P5-4 S-1 N Y P5-5 BS N Y Cat C9P6-1
N-1 + Adjustment
T-1 (transmission) Y Y
Cat C3P6-2 X-1 (transformer) Y Y
P6-3 S-1 (Shunt device including FACTS devices that are connected to ground) Y Y
P6-4 DC Y Y
P7-1System intact
Two adjacent circuits on common structure. (exclude if 1 mile or less) Y Y Cat C5P7-2 Loss of a bipolar DC Y Y Cat C4