Ivan Dudurych

Eirgrid

Real-time Dynamic

Modelling of the Irish

Power System

Manhattan: morning 14 August 2003

Photo by Mike Albans/NY Daily News Archive via Getty Images

Operational Security

WSAT Development Timeline

MAWAT Concept is proposed

Develop-ment the tool as WSAT jointly with Powertech Labs (Canada)

WSAT installed for testing and validation

On-line WSAT is officially launched in NCC

Official Launch AII-island WSAT in NCC and CHCC

Official Launch 5-min, new EMS-based AII-island WSAT in NCC and CHCC

Sep 2008 May 2009 Sep 2010 Nov 2016 Nov 2012

WSAT – Software Structure

Near real-time Wind limits

Security violation details

Results Display

WSAT Manager

On-line VSAT

On-line TSAT

Study WSAT

Real-time system

snapshot

Wind ForecastP

yth

on

Inte

rfa

ce

Other information

Input data

Security AssessmentReal-time

Contingencies

WSAT Calculations

TSA includes

transient period;

automatics operate

VSA – quasi steady state; time period before

manual actions

20 s 5 min

WSAT – Hardware Architecture

System Model of Time Domain

Simulation

Elements of an Excitation System

Ref To Grid

Limiters protective circuits

Voltage Transducer &

Load Compensator

Regulator Exciter Generator

Power System

Stabilizer

Detailed and Equivalent WF Model

110 kV

20 kV

RTr

XTr BTr

GTr

MVAbase=100 MVA

Rtr

Xtr RG

XG

MVAbase=∑Machine MVA

Second Generation Wind Models (WECC)

Model Validation (Stage 1)

Model Validation (Stage 2)

Model Validation (Stage 3)

Model Validation (Stage 3)

Original response (MW) PMU response (MW) Tuned response (MW)

North-West Wind Farm Model v Reality

WSAT Monitor – base case

TSAT Calculations

TSAT Applies faults on each line cleared in accordance to

the installed protection (TSAT Contingencies)

• Monitors machine rotor angles

• Computes Transient Stability

index for all islands

• Attempts to calculate a preventative control measure

(PCM), i.e. a recommendation from WSAT on how the

instability can be prevented.

Total generation

Source Sink

Wind - Conventional generation

Power Transfer

Transfer increase

Base level First

Stability

limit

Second

Stability

limit

All dispatchable

reserves are

exhausted

SecureVoltage

violationsCollapse

Wind MW

Initial

Value

WSAT

Limit

Power Transfer: Example of stages

WSAT monitor - transfers

WSAT Secure Wind graph

WSAT Frequency and RoCoF Summary Table

Transient Insecurity Example

Frequency Insecurity Example

WSAT Conclusion

Combined Real-time and Forecast WSAT

Up to 6 hr ahead

Up to 24 hr ahead

2-D Transfers

Two-dimensional transfer

Secure area

Questions?