October 3, 2012

BAL-001-TRE-1 Primary Frequency Response

Update for Texas RE RSC

2

SAR-003 Standard Drafting Team

BAL-001-TRE-1 RSC October 3, 2012

Name Company

Sydney Niemeyer (Chair) NRG Energy

Ananth Palani (Vice-Chair) Optim Energy

Pamela Zdenek Infigen Energy

Vann Weldon ERCOT

Brenda Hampton Luminant

Sandip Sharma ERCOT (Non-voting SME)

3

Requirements Overview

● Applies to BA, GO and GOP function● Provides requirements for:

Identifying Frequency Measureable Events (FME) Calculating the Primary Frequency Response (PFR) of each

resource in the Region Calculating the Interconnection minimum Frequency Response Monitoring the actual Frequency Response of the Interconnection Setting Governor deadband and droop parameters Providing Primary Frequency Response performance requirements.

● Importantly, the standard narrows the governor deadband and requires the droop curve to begin at the edge of the deadband with no step function.

BAL-001-TRE-1 RSC October 3, 2012

4

PFR Performance Measures

● Under this standard, two Primary Frequency Response performance measures are calculated: “initial” and “sustained.”

● The initial PFR performance (R9) measures the actual response compared to the expected response in the period from 20 to 52 seconds after an FME starts.

● The sustained PFR performance (R10) measures the best actual response from t(46) to t(60), compared to the expected response at t(46).

BAL-001-TRE-1 RSC October 3, 2012

5

BAL-001-TRE-1 RSC October 3, 2012

Primary Frequency Response Reference Document

● This Primary Frequency Response Reference Document is not considered to be a part of the regional standard.

● This document will be maintained by Texas RE and will be subject to modification as approved by the Texas RE Board of Directors, without being required to go through the formal Standard Development Process. This arrangement provides Regional flexibility in

adjusting the technical details of the performance metric calculations.

The PFR Reference Document includes flowcharts that detail the calculations

6

BAL-001-TRE-1 RSC October 3, 2012

PFR Reference Document Revision Process

● A Revision Request may be submitted to the Texas RE Reliability Standards Manager

● The Reliability Standards Committee (RSC) will consider the request The revision request will be posted in accordance with RSC

procedures The RSC shall discuss the revision request in a public meeting,

and will accept and consider verbal and written comments pertaining to the request

The RSC will make a recommendation to the Texas RE Board of Directors

● The Board may adopt the revision request, reject it, or adopt it with modifications Any approved revision to the Primary Frequency Response

Reference Document shall be filed with NERC and FERC for informational purposes

7

BAL-001-TRE-1 RSC October 3, 2012

Technical Document – Initial Flowchart Overview

Read Deadband, Droop, HSL, Capacity and Actual

Frequency

Calculate Ramp Magnitude

Calculate Expected Primary Frequency Response

Calculate Actual Primary Frequency Response

Calculate P.U. Primary Frequency Response

Calculate P.U. Primary Frequency Response Rolling

Average

Is Rolling Avg ≥ 0.75

Pass R9

Fail R9

End

No

Yes

8

BAL-001-TRE-1 RSC October 3, 2012

Field Trial Results

● 28 generating units were evaluated in the trial, which included 7 coal, 4 gas, 2 simple cycle combustion turbine, 5 wind, and 10 combined cycle units.

● Based on events from June 2011 to June 2012.● No high-frequency events were evaluated.● 8-event average was not possible with some

units.● These results use NEW R10 calculation.

9

BAL-001-TRE-1 RSC October 3, 2012

Field Trial Results – Coal Units

Coal Plant R9 R10 Comments

Generator 1 0.5841 0.6460 Generator 2 0.4643 0.3706 Participation in less than 8

events Generator 3 1.1892 1.2609 Generator 4 0.8872 0.9909 Generator 5 0.2530 0.4113 Participation in less than 8

events Generator 6 0.6092 0.8444 Generator 7 1.1987 1.3827

10

BAL-001-TRE-1 RSC October 3, 2012

Field Trial – Gas Units

Gas Plant R9 R10 Comments

Generator 1 0.7712 1.1068 Generator 2 0.4716 0.7218 huge data latency Generator 3 1.3608 1.3778 Participation in less than 8

events Generator 4 1.3415 1.7862 Participation in less than 8

events

Simple cycle combustion turbine R9 R10 Comments

Generator 1 0.1001 0.0178 Participation in less than 8 events

Generator 2 0.7409 0.8621

11

BAL-001-TRE-1 RSC October 3, 2012

Field Trial – Wind Units

Wind Generation R9 R10 Comments

Generator 1 1.3824 1.3737 Participation in less than 8 events

Generator 2 No Evaluation No Evaluation No Participation Generator 3 No Evaluation No Evaluation No Participation Generator 4 0.6259 1.0435 Participation in less than 8

events Generator 5 0.8189 0.7211 Participation in less than 8

events

12

BAL-001-TRE-1 RSC October 3, 2012

Field Trial – Combined Cycle Units

Combined Cycle R9 R10 Comments

Generator 1 0.2712 0.2360 Generator 2 1.5976 1.7676 Participation in less than 8

events Generator 3 0.7664 0.7863 Generator 4 0.5668 0.6246 Generator 5 0.9181 1.2397 Generator 6 1.1232 1.4586 Generator 7 0.6946 0.9575 Generator 8 0.5710 0.8235 Generator 9 0.3705 0.7409

Generator 10 0.7794 1.1074

13

BAL-001-TRE-1 RSC October 3, 2012

Changes Made after Field Trial and Comments

● Changed Sustained Measure (R10) from average over several minutes to instantaneous at t(46). Too much happens during former averaging window.

● Added 2 MW limit to the 2% exception criteria. Applies to generators < 100 MW.

● Moved examples of “legitimate operating conditions that may support exclusion” from Measures to Requirements (R9 and R10).

● M7 re-written to focus on notice from GO to GOP of change in Governor status. Avoids concern about 24/7 proof issue.

● Changed deadband setting from 0.01666 to 0.017 Hz.● Reformatted R2 to break into sub-requirements.● Intend to deal with augmented capacity issue.

Duct burners, etc.

14

Implementation Plan

● 12 months after Effective Date The BA must be compliant with Requirement R1 At least 50% of the GO’s generating units/generating facilities must

be compliant with Requirement R6 (if >1 unit/facility) At least 50% of the GO’s generating units/generating facilities must

be compliant with Requirement R7 (if >1 unit/facility) The GOP must be compliant with Requirement R8

● 18 months after Effective Date The BA must be compliant with Requirements R2, R3, R4, and R5 100% of the GO’s generating units/generating facilities must be

compliant with Requirement R6 100% of the GO’s generating units/generating facilities must be

compliant with Requirement R7

BAL-001-TRE-1 RSC October 3, 2012

15

Implementation Plan

● 24 months after Effective Date At least 50% of the GO’s generating units/generating facilities must

be compliant with Requirement R9 (if >1 unit/facility) At least 50% of the GO’s generating units/generating facilities must

be compliant with Requirement R10 (if >1 unit/facility)

● 30 months after Effective Date 100% of the GO’s generating units/generating facilities must be

compliant with Requirement R9 100% of the GO’s generating units/generating facilities must be

compliant with Requirement R10

BAL-001-TRE-1 RSC October 3, 2012

16

BAL-001-TRE-1 RSC October 3, 2012

Path Forward

● Drafting Team is finishing standard and related documents. Expect completion in November. (11/7 SDT Mtg.)

● Submit for RSC approval in November. Can do by e-mail or call a special meeting.

● Post for Review and Ballot in December – January. Avoid ballot during Holidays.

● RSC Approves ballot results.● TRE Board approval.● NERC/FERC process.

18

770.0

775.0

780.0

785.0

790.0

795.0

800.0

805.0

810.0

59.74

59.76

59.78

59.8

59.82

59.84

59.86

59.88

59.9

59.92

59.94

59.96

59.98

60

60.02

60.04

7:07:14 7:07:24 7:07:34 7:07:44 7:07:54 7:08:04 7:08:14 7:08:24 7:08:34 7:08:44 7:08:54 7:09:04 7:09:14

Fre

qu

en

cy

-Hz

Unit:ABC-4

Hz Average Frequency MW Average MW "EPFR"

803.05

59.878784.25

0.887 Initial P.U. Performance

MW

Saturday, January 00, 1900

R9: Initial Response Performance - Steam Turbine

BAL-001-TRE-1 RSC October 3, 2012

19

750.0

760.0

770.0

780.0

790.0

800.0

810.0

820.0

59.74

59.76

59.78

59.8

59.82

59.84

59.86

59.88

59.9

59.92

59.94

59.96

59.98

60

60.02

60.04

7:07:14 7:08:14 7:09:14 7:10:14 7:11:14 7:12:14 7:13:14 7:14:14 7:15:14 7:16:14 7:17:14 7:18:14 7:19:14 7:20:14 7:21:14 7:22:14 7:23:14

Fre

qu

en

cy

-Hz

Unit:ABC-4

Hz MW Recovery Period Target MW Recovery Period Ramp MW

0.804 Sustained P.U. Performance

MW

Saturday, January 00, 1900

R10: Sustained Response Performance - Steam Turbine

BAL-001-TRE-1 RSC October 3, 2012

20

340.0

345.0

350.0

355.0

360.0

365.0

370.0

375.0

380.0

385.0

390.0

395.0

59.74

59.76

59.78

59.8

59.82

59.84

59.86

59.88

59.9

59.92

59.94

59.96

59.98

60

60.02

60.04

7:07:14 7:07:24 7:07:34 7:07:44 7:07:54 7:08:04 7:08:14 7:08:24 7:08:34 7:08:44 7:08:54 7:09:04 7:09:14

Fre

qu

en

cy

-Hz

Unit:ABC-4

Hz Average Frequency MW Average MW "EPFR"

382.08

59.878

360.98

1.270 Initial P.U. Performance

MW

Saturday, January 00, 1900

R9: Initial Response Performance - Steam Turbine

BAL-001-TRE-1 RSC October 3, 2012

21

340.0

350.0

360.0

370.0

380.0

390.0

400.0

59.74

59.76

59.78

59.8

59.82

59.84

59.86

59.88

59.9

59.92

59.94

59.96

59.98

60

60.02

60.04

7:07:14 7:08:14 7:09:14 7:10:14 7:11:14 7:12:14 7:13:14 7:14:14 7:15:14 7:16:14 7:17:14 7:18:14 7:19:14 7:20:14 7:21:14 7:22:14 7:23:14

Fre

qu

en

cy

-Hz

Unit:ABC-4

Hz MW Recovery Period Target MW Recovery Period Ramp MW

1.262 Sustained P.U. Performance

MW

Saturday, January 00, 1900

R10: Sustained Response Performance - Steam Turbine

BAL-001-TRE-1 RSC October 3, 2012

22

100.0

105.0

110.0

115.0

120.0

125.0

130.0

135.0

59.74

59.76

59.78

59.8

59.82

59.84

59.86

59.88

59.9

59.92

59.94

59.96

59.98

60

60.02

60.04

7:07:14 7:07:24 7:07:34 7:07:44 7:07:54 7:08:04 7:08:14 7:08:24 7:08:34 7:08:44 7:08:54 7:09:04 7:09:14

Fre

qu

en

cy

-Hz

Unit:ABC-4

Hz Average Frequency MW Average MW "EPFR"

127.16

59.878108.88

1.199 Initial P.U. Performance

MW

Saturday, January 00, 1900

R9: Initial Response Performance - Steam Turbine

BAL-001-TRE-1 RSC October 3, 2012

23

90.0

100.0

110.0

120.0

130.0

140.0

150.0

59.74

59.76

59.78

59.8

59.82

59.84

59.86

59.88

59.9

59.92

59.94

59.96

59.98

60

60.02

60.04

7:07:14 7:08:14 7:09:14 7:10:14 7:11:14 7:12:14 7:13:14 7:14:14 7:15:14 7:16:14 7:17:14 7:18:14 7:19:14 7:20:14 7:21:14 7:22:14 7:23:14

Fre

qu

en

cy

-Hz

Unit:ABC-4

Hz MW Recovery Period Target MW Recovery Period Ramp MW

1.181 Sustained P.U. Performance

MW

Saturday, January 00, 1900

R10: Sustained Response Performance - Steam Turbine while Ramping up before and during event

BAL-001-TRE-1 RSC October 3, 2012

24

164.0

166.0

168.0

170.0

172.0

174.0

176.0

178.0

180.0

182.0

59.74

59.76

59.78

59.8

59.82

59.84

59.86

59.88

59.9

59.92

59.94

59.96

59.98

60

60.02

60.04

7:07:14 7:07:24 7:07:34 7:07:44 7:07:54 7:08:04 7:08:14 7:08:24 7:08:34 7:08:44 7:08:54 7:09:04 7:09:14

Fre

qu

en

cy

-Hz

Unit:ABC-4

Hz Average Frequency MW Average MW "EPFR"

174.47

59.878

170.00

0.621 Initial P.U. Performance

MW

Saturday, January 00, 1900

R9: Initial Response Performance - Combustion Turbine with below standard performance

BAL-001-TRE-1 RSC October 3, 2012

25

162.0

164.0

166.0

168.0

170.0

172.0

174.0

176.0

178.0

180.0

182.0

59.74

59.76

59.78

59.8

59.82

59.84

59.86

59.88

59.9

59.92

59.94

59.96

59.98

60

60.02

60.04

7:07:14 7:08:14 7:09:14 7:10:14 7:11:14 7:12:14 7:13:14 7:14:14 7:15:14 7:16:14 7:17:14 7:18:14 7:19:14 7:20:14 7:21:14 7:22:14 7:23:14

Fre

qu

en

cy

-Hz

Unit:ABC-4

Hz MW Recovery Period Target MW Recovery Period Ramp MW

0.401 Sustained P.U. Performance

MW

Saturday, January 00, 1900

R10: Sustained Response Performance – Combustion Turbine with below standard performance

BAL-001-TRE-1 RSC October 3, 2012