Ameren PRC-023 Audit Preparations.pdf - SERC Home Page
Ameren PRC-023 Audit Preparations.pdf - SERC Home Page
Ameren PRC-023 Audit Preparations.pdf - SERC Home Page
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<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong><br />
<strong>Preparations</strong><br />
Robert J. Rauschenbach<br />
<strong>Ameren</strong> Services<br />
System Protection Supervising Engineer<br />
2/29/2012
History<br />
• The loading of the protected equipment has<br />
always been a consideration in Protection<br />
System design.<br />
• 2003 blackout<br />
• NERC Recommendation 8a<br />
– Zone 3<br />
• Reviewed all >200kV Zone<br />
3 in 2006 & prior<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 2
<strong>Ameren</strong> Processes<br />
• Protection Design Guide<br />
• <strong>PRC</strong> Procedures<br />
• Database of relay settings<br />
• EXCEL file with relay loadability per NERC<br />
method<br />
• <strong>SERC</strong> & NERC Participation<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 3
<strong>PRC</strong>-<strong>023</strong>-1<br />
Transmission Relay Loadability<br />
• Effective July 1, 2010 for section 5.1.1<br />
• Purpose: Protective relay settings shall not<br />
limit transmission loadability<br />
• Applicability: load-responsive phase<br />
protection systems<br />
Lines & Transformers >200kV<br />
<strong>Audit</strong> Prep<br />
• Scope<br />
• Confirm that applied relay settings meet<br />
criteria for all terminals<br />
• Participate in pre-audit telecoms<br />
• Provide pre-audit list for sampling<br />
• Assemble info for samples<br />
• Develop RSAW response and backup to clearly<br />
explain and show how we comply<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 5
<strong>Audit</strong> Execution<br />
• Present detailed explanation for a selected<br />
sample<br />
– Used R1.1 for all but a couple terminals<br />
– Derivation of spreadsheet equations starting from<br />
NERC Standard and relay characteristics<br />
– Explain trip equation for all phase protection<br />
• Have material ready to similarly support all<br />
selected samples<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 6
R1 …evaluate at 0.85 pu voltage & PF angle=30<br />
R1.1 … set above 150% highest 4 hour Facility Rating in amps<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 7
Example<br />
of <strong>Audit</strong><br />
Data<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 8
Example of <strong>Audit</strong> Data (continued)<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 9
<strong>Audit</strong> Spreadsheet<br />
• Identify line, substation, & kV<br />
• Identify relay, type & function<br />
• State <strong>PRC</strong>-<strong>023</strong> Criteria used<br />
• Show longest relay reach in primary ohms &<br />
Maximum Torque Angle<br />
• Calculate NERC Relay Load Limit in Amps<br />
• Show Limiting Equipment, & its highest rating<br />
in Amps & MVA<br />
• Margin % = (100%)(NERC RLL) / (Rating)<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 10
Belleau Relay Setting –<br />
CT and PT Ratios<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 11
Belleau Relay Setting –<br />
Phase Reaches<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 12
Belleau Relay Setting –<br />
Trip Equation<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 13
Example of <strong>Audit</strong> Data (continued)<br />
Base I at 345 kV = 167.35<br />
Base Z at 345 kV = 1190.25<br />
<strong>Ameren</strong> Relay Load Limits (RLL) per NERC Requirements<br />
Transmission<br />
Line /<br />
Transformer Relay ID Relay Description / Type Function Criteria Substation kV Posn Line<br />
Longest<br />
Relay Reach<br />
(Pri. Ohm)<br />
MTA<br />
NERC<br />
RLL<br />
(Amps)<br />
Emergency<br />
Limit<br />
(MVA)<br />
Emergency<br />
Limit<br />
(Amps)<br />
Margin<br />
(%)<br />
Limiting<br />
Equipment<br />
Belleau-<br />
Montgomery-6 Line 11#1-V32<br />
Belleau terminal-line relaying<br />
Zone 2 / SEL421 Phase distance R1.1 Belleau 345 V32 BELU-MTGY-6 58.50 83.6 3251 1714 2868 113.4 Conductor<br />
Turkey Hill terminal-line<br />
Baldwin-Turkey Hill- L4521 Relay relaying System #2 SEL-321 Phase distance<br />
4521<br />
System #2 PT<br />
backup and PT R1.1 Turkey Hill 345 4521 to Ballwin 25.00 85.0 7872 956 1600 492.0<br />
Disconnect<br />
Switch<br />
Casey West-<br />
Sidney-4525<br />
21XL2829<br />
Casey terminal-line relaying<br />
Carrier Trip / SDU-1<br />
Phase distance<br />
Kansas, W /<br />
- Pilot DCB Trip R1.1 Casey, W 345 2829 Sidney 53.00 75 3012 1195 2000 150.6<br />
Disconnect<br />
/ WT<br />
Casey West-<br />
Sidney-4525<br />
121YL1620<br />
Kansas W. terminal-line<br />
relaying CEB52A<br />
Phase distance<br />
backup R1.1 Kansas, W 345 1620 Casey, W 82.70 75 1930 478 800 241.3 CT<br />
Coffeen North-<br />
Holland Northwest-<br />
1 21LM4142<br />
Coffeen North-<br />
Holland Northwest-<br />
1 21LM1618<br />
Coffeen North terminal-line<br />
relaying Zone 2 / SEL-321<br />
Holland NW terminal-line<br />
relaying Zone 2 / SEL-421<br />
Phase distance<br />
backup and<br />
DCB trip R1.1 Coffeen, N 345 4142 Holland, NW 45.00 85 4373 956 1600 273.3 Wave Trap<br />
Phase distance<br />
backup and<br />
DCB trip R1.1 Holland, NW 345 1618 Coffeen, N 60.00 85 3280 1195 2000 164.0 CT<br />
Prairie State-<br />
Stallings-4531<br />
Prairie State-<br />
Stallings-4531<br />
11#1-V12<br />
L4531<br />
System#1<br />
and<br />
System#2<br />
Prairie State terminal - line<br />
relaying Zone 2 / SEL421<br />
Stallings terminal - line<br />
relaying System #1 and #2<br />
SEL321/421<br />
Phase distance<br />
backup and<br />
DCB trip R1.1 Prairie State 345 4531 to Stallings 43.45 85.6 4598 1793 3000 153.3 Breaker<br />
Phase distance<br />
backup and<br />
pilot trip R1.1 Stallings 345<br />
4531 to Prairie<br />
State 41.55 85.6 4806 1793 3000 160.2 Breaker<br />
Xenia-Raccoon<br />
Creek-1<br />
21LM7677<br />
Xenia terminal - line relaying<br />
Zone 2 / SEL321<br />
Phase distance<br />
backup and<br />
DCB trip R1.1 Xenia 345 7677 Raccoon Creek 75.00 80 2341 717 1200 195.1 CT<br />
NERC R1.1 Formula is used to calculate the RLL Amps:<br />
=((0.85/1.5)*($D$2)/((J14/$D$3)*COS((K14-30)*PI()/180)))<br />
Calc MVA from amps<br />
=1.732*G14*N14/1000<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 14
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 15
Q<br />
U<br />
E<br />
S<br />
T<br />
I<br />
O<br />
N<br />
S<br />
<br />
<strong>Ameren</strong> <strong>PRC</strong>-<strong>023</strong> <strong>Audit</strong> Prep 16
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