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Vahid Jalili-Marandi, Ph.D.OPAL-RT Technologies

Vahidj@opal-rt.com

ePHASORsim:

Real-time transient stability simulation tool

ePHASORsim

eFPGAsim

Wide Area Simulation

Large EMT Simulation

Power Systems & Power

Electronics

Precise Power Electronics Simulation

Large10 000+ Nodes

Small<100 Nodes

Model Size

nanosecondsmilliseconds

Simulation time-step

microseconds

eMEGAsim

HYPERSIM

Mixed Phasor-EMT mode with simulation of communication

and SCADA Systems

Real-time transient stability simulator• Large-scale power systems • Transmission, distribution and generation

Phasor domain solution • Nominal frequency• Positive sequence (balanced systems)• 3-phase (unbalanced systems)• Time-step in the range of few milliseconds

What is ePHASORsim?

Offline Phasor Tools time-step: millisecond

PSS/e

ETAP

EUROSTAG

CYME

Real-time Simulatorstime-step: microsecond

eMEGAsim

Hypersim

RTDS

…

ePHASORsim

What are existing tools?

ePHASORsim is a TS-type simulation tool that not only runs offlinebut also runs in real-time on RT-LAB enabled simulators

• Built-in positive sequence and 3-phase library

• Synchronous machine• Excitation system, turbine-governor• Controllable voltage source• Controllable current source• Transformer:

• OLTC, mutual impedance, unbalanced tap• Line:

• PI section, sequence impedance, phase impedance• Load

• Constant power, constant current, constant impedance, ZIP• Shunt devices• Breaker, switches, and events

Features…

Features…

• Simulation of Transmission

and Distribution Systems

PI Section in positive sequence networks

3-Phase PI section with sequence impedance

3-Phase PI section with phase impedances

• Flexible data input format

• Excel workbook• Positive sequence components

• Three-phase components

• Measurements and commands

• PSS/e data conversion:• *.raw and *.dyr files

• Measurements and commands

Features…

• On-the-fly changes of parameters

• P and Q of loads

• Load and generation profile

• Transformer tap position

• Service status of load, branch, machine

• Set-points and references for controllers

• Fault on a transmission line with variable location

• …

Features…

• Measurement, monitoring, and log files

• RMS and angle of voltage and current

• Tap position of transformers

• Service status of machine, load, branch, etc.

• Log measurements in *.mat during simulation for further analysis

• ScopeView and Matlab compatible output files

• …

Features…

• Parallel processing

• Linked with METIS to partition the system automatically

• Linked with openMP for CPU core assignments

• Parallel solver

• …

Features…

• Performance for 33,000 buses distribution system, 10ms time-step

Features…

• Ethernet protocols and I/Os

• Compatible with communication protocols and I/O cards that OPAL-RT targets support

• PMU streams with C37.118

• DNP and OPC

Features…

• Support FMI: Functional Mock-up Interface

• Background of FMI in a glance… • The European ITEA2 project, 2008-2011, leaded MODELISAR and 29 partners worked to improve

of systems and embedded software in vehicles.

• FMI was developed as the result of this project to exchange models from different simulation environments, including Modelica and non-Modelica tools.

• Today about 67 simulation tools support FMI

• In power system area, iTesla project (initiated in 2012) is using FMI for model exchange and parameter validation.

Features…

• Support FMI: Functional Mock-up Interface

• FMI in ePHASORsim…• Expands the built-in library of models

• Integrates user defined models

• Exchange models between different simulation tools

• Feasibility for cross-company and development partners collaborations

• Transparency of models and…. keep them independent from the solver

Features…

Modelica 2011: Functional Mockup Interface Slide 18

FMI - Main Design Idea (1)

FMI for Model Exchange:

Version 1.0 released in January 2010

FMI for Co-Simulation:

Reuses as much as possible from FMI for Model Exchange standard

Version 1.0 released in October 2010

Tool

Solver

FMU

Model

ToolFMU

Model

Solver

Slide from

www.fmi-standard.org

Modelica 2011: Functional Mockup Interface Slide 19

FMI - Main Design Idea (2)

A component which implements the interface is called

Functional Mockup Unit (FMU)

Separation of

Description of interface data (XML file)

Functionality (C code or binary)

A FMU is a zipped file (*.fmu) containing the XML description file and the implementation in source or

binary form

Additional data and functionality can be included

Interface specification: www.functional-mockup-interface.org

Slide from

www.fmi-standard.org

• FMI for Modelica based FMUs

• FMU generation for both Windows and Linux OS

• FMI is compatible with OpenModelica: an open source Modelica tool

• A library of models are developed based on PSS/e components

Features…

ePHASORsim’s FMU CreatorFMUs are loadable directly from• Excel Template • PSS/e *.dyr file

ePHASORsim in action…

• Operator Training Simulator

• Wide visibility of the system

• Dynamic system identification

• Wide area oscillation detection

• Phasor based state estimation

• Automatic feedback control

• Optimize placement of PMUs

Phasor Simulator for Operator Training

ePHASORsim Model• Real-time• 10 ms time-step• Linux OS

ePHASORsimSimulator

Synchrophasor Application• Angle difference • P and Q• Frequency• Sensitivity analysis• Angular separation• Visualization, alarm,

notification• …

RTDMSTools

C3

7.1

18

Pro

toco

l

• AGC Integrated with ePHASORsim

• Europe• University College Dublin (Ireland)

• Aalborg University (Denmark)

• Newcastle University (UK)

• Enel (Italy)

• Kassel University (Germany)

• Fraunhofer IWES (Germany)

• University of Lille (France)

Users/collaborators…

• Asia• TNBR (Malaysia)

• National Tsing Hua University (Taiwan)

• CEPRI (China)

• Indian Institute of Technology (India)

• Central Power Research Institute (India)

• America• GE Energy• PNNL • EPG (Collaboration)• ETAP (Collaboration)• IOWA State University• University of Tennessee• Oupus One Solutions• Universidad Concepcion

(Chile)

Questions…?