pwg update to the oc - pwg update to... · 2020-07-10 · frequency response. 14. y = -0.0578x +...

July 13-14, 2020

James WellsPWG Chair

PWG Update to the OC

CPS 1 & BAAL

2

Interconnection CPS1

3

Presenter

Presentation Notes

Most Recent Data being gathered and prepared. Trend is the same as the past PWG Update

BAAL Exceedances

4

Presenter

Presentation Notes


DCS & EEA

5

BAL-002-WECC-2 SAR

FERC filing pending approval• Additional data requests were submitted to FERC in their ongoing

consideration of the SAR

BAL-002-WECC-2 Compliance Waiver extension in effect until 4/30/21

6

DCS Reportable Events

7

0

5

10

15

20

25

30

35

40

Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

2012 2013 2014 2015 2016 2017 2018 2019

Number of Reportable Events

Presenter

Presentation Notes


Greater than MSSC

8

0

1

2

3

4

5

6

7

8

Qua

rter Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Year 2012 2013 2014 2015 2016 2017 2018 2019

Greater than MSSC

Presenter

Presentation Notes


EEA Events

2017 2018 2019EEA-1 3 4 4EEA-2 3 16 13EEA-3 4 4 3Total 10 24 20

9

If a EEA-1 is issued, followed by a higher level, only the highest level is in the summary

Presenter

Presentation Notes


Frequency Response

10

BAL-003-1.1 (SAR)

Phase 1: Focus on IFRO calculation and fix administrative issues with attachments

Approved by NERC Ballot Pending FERC Approval

11

BAL-003-1.1 (SAR)

Drafting Team actively working on Phase 2 SAR Initial ballot will be formal ballot. Entities encouraged to provide comments

• Median FRM vs Average FRM• Generator Operator requirement for frequency control and governor response• Operating process to have frequency response

Q2-Q3 timeframe

12

Frequency Response

13

y = 0.2409x - 8649.6

0.00

500.00

1000.00

1500.00

2000.00

2500.00

3000.00

3500.00

4000.00

4500.00

5000.00

10/23/15 3/11/16 7/29/16 12/16/16 5/5/17 9/22/17 2/9/18 6/29/18 11/16/18 4/5/19 8/23/19 1/10/20

Western A to B IFRM

Presenter

Presentation Notes

A to B frequency response captures the effectiveness of primary frequency response in stabilizing frequency following a large frequency excursion. This Measure is the conventional means of calculating Frequency Response as the ratio of net MW lost to the difference between Point A and Point B frequency values. Most Recent Data being gathered and prepared. Trend is the same as the past PWG Update

Frequency Response

14

y = -0.0578x + 3312.2

0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,500

5,000

10/23/15 3/11/16 7/29/16 12/16/16 5/5/17 9/22/17 2/9/18 6/29/18 11/16/18 4/5/19 8/23/19 1/10/20

Western A to C IFRM

Presenter

Presentation Notes

A to C frequency response captures the impacts of inertial response, load response (load damping) and initial governor response (governor response is triggered immediately after frequency exceeds a pre-set deadband; however, depending on generator technology, full governor response may require up to 30 seconds to be fully deployed). This Measure is calculated as the ratio of net megawatts lost to the difference between Point A and Point C frequency values. Most Recent Data being gathered and prepared. Trend is the same as the past PWG Update

Frequency Response

15

y = 4E-05x + 58.237

59.700

59.750

59.800

59.850

59.900

59.950

60.000

10/23/15 3/11/16 7/29/16 12/16/16 5/5/17 9/22/17 2/9/18 6/29/18 11/16/18 4/5/19 8/23/19 1/10/20

Hz

Axis Title

Western Cn

Presenter

Presentation Notes

Cn to USLF ratio measures the margin between the frequency nadir and the first step in Under Frequency Load Shed (UFLS). Most Recent Data being gathered and prepared. Trend is the same as the past PWG Update

Frequency Response

16

Tc to T0

Presenter

Presentation Notes

Time to nadir. Anything greater than 12 seconds is excluded from M4 analysis. Median is 8.2, but quite a spread between 4 seconds and 12 seconds. Most Recent Data being gathered and prepared. Trend is the same as the past PWG Update

Inadvertent & Time Error

17

ABS Combined Inadvertent Interchange

18


19


20

Accumulated Time Error

21

Time Error

Status of Time Error in West:• Strong Correlation to PII• ATEC managing PII balances very well• TE oscillating around -120 Seconds

22

Presenter

Presentation Notes

PII has accumulation limits at month end but not during mid-month. Without capping PII totals or reducing PII, we will likely continue to see time error swings.

Time Error

NAESB WEQ-006 (Not Retired)• Business Practice Standard • Requires +/- 30 seconds TE• Many but not all entities in WECC use FERC pro-forma tariff which

mentions adherence to NAESB Standards

23

Presenter

Presentation Notes

PII has accumulation limits at month end but not during mid-month. Without capping PII totals or reducing PII, we will likely continue to see time error swings.

Time Monitoring

Evaluating 2 Options:• Option 1: Analysis on TE and PII and impacts of a clock reset.• Option 2: PWG Guideline to recommend WI Time Monitor to resume

manual time error corrections to +/- 30 seconds based on NAESB Standards still in effect.

24

Inertia

25

Inertia Data

RC Transition left a gap in inertia data No data from November-April WI RCs now submitting data to NERC, PWG actively working on

getting/collecting data to develop future trends

26

Contact:

27

James Wells, P.E. LADWP – Operation SupportPWG [email protected]

pwg update to the oc - pwg update to... · 2020-07-10 · frequency response. 14. y = -0.0578x +...

Documents