Frequency Response Initiative WECC Generator Operator Working Group - - PowerPoint PPT Presentation

▶

Nov 16, 2022 417 likes •651 views

Frequency Response Initiative WECC Generator Operator Working Group Troy Blalock South Carolina Electric and Gas NERC Resource Subcommittee June 7, 2018 Agenda Why Primary Frequency Response is Important Review the History and

SLIDE 1

Frequency Response Initiative

WECC Generator Operator Working Group

Troy Blalock – South Carolina Electric and Gas NERC Resource Subcommittee June 7, 2018

SLIDE 2

RELIABILITY | ACCOUNTABILITY 2

Agenda

Why Primary Frequency Response is Important
Review the History and Industry Outreach
Discuss the Identified Issues

▪ Dead Band ▪ Outer Loop Controls

Voluntary Initiative
Frequency Response Guideline
Whats next

SLIDE 3

RELIABILITY | ACCOUNTABILITY 3

Reliability of the Interconnection

▪ Line of defense to prevent Under Frequency Load Shedding (UFLS) ▪ Prevent equipment damage ▪ Droop is essential for system restoration

Compliance with NERC Reliability Standards
Accurately predict system events (transmission models)
NERC Alert on February 5, 2015 (Generator Governor Frequency

Response Advisory)

LL166: Generator Trip While Performing Frequency Response
Solar Inverter Resource Interruption

Frequency Response Importance

SLIDE 4

RELIABILITY | ACCOUNTABILITY 4

NERC Outreach OEM and Engineering Firms

SLIDE 5

RELIABILITY | ACCOUNTABILITY 5

Generator Governor Frequency Response Advisory

Advisory issued February 5th
Initiated by NERC Resource

Subcommittee ▪ Interconnections frequency response has declined ▪ Eastern Interconnection Lazy L profile ▪ 2010 and 2013 Generator Survey Data

Generator Governor Frequency Response Advisory

SLIDE 6

RELIABILITY | ACCOUNTABILITY 6

Turbine OEM Reach Out to Customer Base

SLIDE 7

RELIABILITY | ACCOUNTABILITY 7

The Capability Goal Reliability Guideline: Primary Frequency Control

In order to provide Primary Frequency Control, it is recommended that all resources connected to an Interconnection be equipped with a working governor or equivalent frequency control device. The primary focus of the Guideline is prime mover governors. Other forms of resources providing frequency response should have similar response characteristics described herein for governor.

3 -175 MW GE7FA Gas Mark VIe Turbine Frequency Algorithm added to Plant DCS

Additional information

NERC Reliability Guideline: Primary Frequency Control

SLIDE 8

RELIABILITY | ACCOUNTABILITY 8

Applicable to all BES Generators (to include nuclear, renewables

and storage)

▪ a) Gross individual nameplate rating greater than 20 MVA. Or, ▪ b) Gross plant/facility aggregate nameplate rating greater than 75 MVA.

*Non-BES generators are encouraged to submit survey results

Industry lead initiative to gather information through Generator

Surveys to further analyze the Interconnections’ frequency response.

▪ Approved by the NERC Operating Committee September 2016 ▪ Advocated by the North American Generator Forum (NAGF)

GOP Survey first introduced during a December 8, 2016 Webinar

Frequency Response Initiative – Generator Event Survey Webinar

Purpose of the Survey

SLIDE 9

RELIABILITY | ACCOUNTABILITY 9

GO survey

NERC email list was

short and mostly compliance folks

Overall knowledge

about the principals of frequency response

GO data

Shortcomings:

SLIDE 10

RELIABILITY | ACCOUNTABILITY 10

Draft - West Interconnection Results

SLIDE 11

RELIABILITY | ACCOUNTABILITY 11

Draft - East Interconnection Results

SLIDE 12

RELIABILITY | ACCOUNTABILITY 12

Coordination with plant DCS is a requirement when

perating in MW Set Point Coordinated Control.

What has been learned – Outer Loop Control

SLIDE 13

RELIABILITY | ACCOUNTABILITY 13

Illustration

450 MW

Frequency 60.000 Hz

150 MW 150 MW 150 MW

Graphic from GE info bulletin PSIB20150212

Missing

SLIDE 14

RELIABILITY | ACCOUNTABILITY 14

Illustration

450 MW

Frequency 59.940 Hz

153 MW for little more than 1 second 150 MW +/- Dead Band MW 153 MW for little more than 1 second

Graphic from GE info bulletin PSIB20150212

Missing

SLIDE 15

RELIABILITY | ACCOUNTABILITY 15

Example

450 MW

Frequency 59.940 Hz

153 MW 150 MW +/- Dead Band MW 153 MW 456 MW 6 MW

Graphic from GE info bulletin PSIB20150212

SLIDE 16

RELIABILITY | ACCOUNTABILITY 16

Example

400 MW

Frequency 60.000 Hz

150 MW 150 MW 100 MW 400 MW 0 MW

Graphic from GE info bulletin PSIB20150212

SLIDE 17

RELIABILITY | ACCOUNTABILITY 17 Graphic from GE info bulletin PSIB20150212

Conventional Steam Plant

Frequency 59.940 Hz

400 MW 6 MW 406 MW +/- Dead Band MW 406 MW

SLIDE 18

RELIABILITY | ACCOUNTABILITY 18

2015 BAL-003-1 Performance Western Interconnection: BA performance 1.3 times greater than FRO. Meet IFRO 23 of 25 times Eastern Interconnection: BA performance 2.3 times greater than FRO. Meet IFRO 30 of 30 times with room to spare

SLIDE 19

RELIABILITY | ACCOUNTABILITY 19

Recommendation Every BES Generator should have a working governor and be set in accordance with Frequency Response Guideline for system reliability and system restoration and provide primary frequency response between Pmin and Pmax.

▪ Exemptions Nuclear, existing wind solar, or possibly some others (environmental. etc)

LGIA and SGIA has been modified to require the same for all future generation.

SLIDE 20

RELIABILITY | ACCOUNTABILITY 20

Next Steps

Coordinate with NAGF to conduct Webinars this Fall
Conduct addition GO survey fall 2018
Work with BA and GO to improve participation and data quality

SLIDE 21

RELIABILITY | ACCOUNTABILITY 21

Troy Blalock, P.E. South Carolina Electric & Gas Company 601 Old Taylor Rd. Cayce, SC 29033 Mail Code J42, Cayce, SC 29033 Office #: 803-217-2040 Cell #: 803-206-8984 Fax #: 803-933-8220 Email: Jblalock@scana.com