Engineering a sustainable future 1 ERCOT Voltage Ride-Through Study Workshop June 26 th, 2009

Engineering a sustainable future1

ERCOT Voltage Ride-Through Study Workshop

June 26th, 2009


Agenda

PB Introduction

VRT Study Scope

Data Requirement from Wind

generator Owners

Data Requirement Schedule

Q&A


Agenda

PB Introduction

VRT Study Scope


generator Owners


Q&A


PB – working with clients worldwide and meeting their needs for over 100 years

Comprehensive project management services and technical excellence - helping clients deliver sustainable solutions

PB Power Worldwide

Capabilities

BostonBoston

San Francisco

San Francisco

Kuwait / UAE

Kuwait / UAE

SingaporeSingapore

NewcastleNewcastle

Major PowerTechnical Centers

Dallas / HoustonDallas / Houston

Wellington/AucklandWellington/Auckland

Manchester / Godalming

Manchester / Godalming

New YorkNew York

BrisbaneBrisbane

Global expertise - local understanding


VRT Study Team

Mandhir Sahni, PhD

Yunzhi Cheng

Project ManagerSunil Talati, P.E.

Phase I

Mandhir Sahni, PhDYunzhi Cheng

Phase III

Lloyd Pasley

Phase II

ERCOTProject Managers

John Schmall, P.E.José Conto

QA/QCJeyant Tamby, PhD-Sungard

Principal-In-ChargeEric C. Swensen, P.E.

Other Support Staff


ERCOT

WGRs

PB

Communication Protocols

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NDAs

ERCOT

WGRsPB

Equipment Manufactures

PB will share data with ERCOT

Microsoft Word Document

PB’s Standard NDA


Agenda

PB Introduction

VRT Study Scope


generator Owners


Q&A


VRT Study Overview

Determine if there are any system reliability risks associated with existing wind plants (with an IA signed prior to November 1, 2008) that do not comply with ERCOT VRT requirements


VRT Study OverviewPhase I

Dynamic simulations utilizing existing ERCOT model data set

High wind – High load High wind – Low load

Phase II Verify wind plant modeling and develop model

improvements as necessaryPhase III

Dynamic simulations utilizing updated models based on model verification

Test sensitivities and mitigation as necessary


Project Schedule

Phase I Completion by September 2009

Phase II Completion by December 2009

Phase III Completion by April 2010

VRT Study Overview


Phase I Study Cases System Topology

SSWG 2009 DSA Fall Cases ~9400 MW Wind Capacity

High Wind – High Load Scenario ~58000 MW ERCOT System Load ~4800 MW Wind Output (West Texas) N-1 Security Constrained Generation Dispatch

High Wind – Low Load Scenario ~36000 MW ERCOT System Load ~4300 MW Wind Output (West Texas) N-1 Security Constrained Generation Dispatch


Contingency Selection

It is necessary to select a limited set of contingencies

for dynamic simulation

Single Line/Double Circuit Contingencies Three-Phase Faults with Normal Clearing Single-Phase Faults with Delayed Clearing (Breaker

Failure)


Contingency Selection

Contingency Selection Process Fault Analysis

Identify fault locations that cause the greatest voltage drop at wind plant POIs

AC Contingency Analysis Identify contingencies that result in the lowest

post-contingency voltages Identify contingencies that result in the greatest

decrease in voltage

PV Analysis Identify contingencies that are most critical with

respect to voltage stability West Texas export transfer scenarios


Wind Plant Model Verification

Network Additions• Collector System

Equivalent• Pad-Mounted

Transformer

Equivalent• Shunt Devices &

Control Schemes


Phase II Process

PB Will Collect Modeling DataDirectly From Wind Plant Owners

Model Development for ALL Wind Plants

Wind Plant Model Will Require Some Form of Owner “Approval”


Phase III ProcessPerform Dynamic Simulations Utilizing

Enhanced Wind Plant Models

Evaluate Up To Six Additional Scenarios Variation in generation dispatch

(conventional and/or wind)? VRT capability added to wind plants? Addition of reactive resources? Variation in the load model?

Scenario Selection Dependent on Initial Simulation Results


Agenda

PB Introduction

VRT Study Scope

Data Requirement from WGRs


Q&A


Phase II Steps Step 1 – Build Consensus

Data Request Forms (DRF) approval from ERCOT and TSPs

Sign confidentiality agreements with equipment vendors and WGRs

Step 2 – Conduct Workshop Conduct Workshop with WGRs

Step 3 - Collect and Validate data submitted by WGRs Existing WGR models for operating units WGR models for planned units

Step 4 – Prepare Equivalent Circuit for individual WGR units


Phase II Scope Limited to ALL WGRs

with an IA signed prior to Nov 1, 2008 Accurate and complete data submittal is

essential Source of information:

ERCOT Wind Data Forms and Models – information submitted during the interconnection study phase

Resource Asset Registration Forms (RARF)

LVRT Status Survey Design / Construction documents


General Information

Submittal Information Date format shall be MM/DD/YYYY Resource Entity name must match ERCOT’s record

Resource Entity Authorized Representative As registered with ERCOT Responsible for submission of RARF to ERCOT

Primary Contact / Technical Contact Site or facility contact for Generation Resources May be Authorized Representative

Provide your contact information by Monday, June 29th, 2009.


Facility One Line DiagramTSP Substation Data

Transmission Line Data

Relaying and Protection Scheme

Transformer DataCollector System Substation Data

Collector System Data


Collection System Diagram

UG Cable Layout & Size

Turbine Location, Type and Size


Collection System Data


Collection System Data


Updated Data Forms

Microsoft Office Excel Worksheet

Provide comments on the attached data forms by Thursday, July 2nd, 2009.


Agenda

PB Introduction

VRT Study Scope and Challenges

Data Requirement from WGRs


Q&A



WGRs to provide completed General Information form by Monday June 29th, 2009.

WGRs to provide comments on VRT Data Request Forms by COB Thursday, July 2nd, 2009.

PB will submit updated VRT Data Request Forms to WGRs by COB Friday, July 10th, 2009.

WGRs to submit completed VRT Data Request Forms by COB Friday July 31st, 2009.


PB Contact Information

Sunil TalatiPB Power

2777 Stemmons FreewaySuite 1520

Dallas, TX 75207Ph 214-678-1190Cell 214-649-7365

Email: [email protected]

PB Team

Documents

Engineering a sustainable future 1 ERCOT Voltage Ride-Through Study Workshop June 26 th, 2009