www.opal-rt.com

Asma Merdassi, Ph.D.05/12/2014

OPAL-RT TECHNOLOGIESREAL-TIME POWER SYSTEMS SIMULATOR

PSIM-eHS Interface

22

Outline

• Introduction : electric Hardware Solver (eHS)

• Building a PSIM model with eHS solver

• How to Start

• Case studies

• DEMO

• Prospective : New Workflow

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Introduction : electric Hardware Solver (1/3)

eHS : electric Hardware Solver

• Simulation of switched electronic circuit on FPGA

• Very high sampling frequency, up to 5 MHz• Building electric circuit models from a PSIM circuit in real-time (with

Ts between 150 nanos to 1µs)

• No need to write mathematical equations • Use of PSIM schematic editor

• Can be interfaced with real devices, such electronic system controllers, through analog and digital input, output hardware

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Introduction : electric Hardware Solver (2/3)

eHS : electric Hardware Solver

• Circuit parameters and topology can be changed without regenerating the bitstream

• Up to four (4) eHS cores can be interconnected

• Data logging implemented on FPGA to record signals with time steps as low as 200 nanoseconds

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eHS

(electrical Hardware Simulation)

Solver

Automatic generation of NetListfile (circuit.cct)

Parsing NetList

Nodal Analysis Approach

Generating eHS matrixes

Automatic methodology

OUTPUTS

FPGA Implementation

USER INPUT

Introduction : electric Hardware Solver (3/3)

Structure of converter

PSIM circuit editor

(Circuit.psimsch)

66

Building a PSIM model with eHS solver

Switches

Sources

Passive

components

Measurements

PSIM Electrical Source Library

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Parameter settings for switches

Building a PSIM model with eHS solver

For one circuit, the eHS solver

supports a maximum number of

24 switches.

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Building a PSIM model with eHS solver

Parameter settings for passive components

For one circuit, the eHS solver

supports a maximum number of 60

non-switching devices (ie. L and

C) and unlimited number of

resistors.

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Building a PSIM model with eHS solver

Parameter settings for sources

For one circuit, the eHS

solver supports a maximum

number of 16 inputs

(voltage/current sources).

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Building a PSIM model with eHS solver

Parameter settings for sources

1111

Building a PSIM model with eHS solver

Parameter settings for measurement components

For one circuit, the eHS solver

supports a maximum number of

16 outputs (voltage/current

measurements).

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Building a PSIM model with eHS solver

• Each circuit requires at least one ground.

• It is used as a reference by the solver and can be placed anywhere in the circuit.

Ground

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Building a PSIM model with eHS solver

• There are two types of inputs and one type of output to eHS:Inputs

1. Electrical source (voltage or current) referred to as “U”2. Pulse controlling a power switch referred to as “SW”

Outputs1. Electrical measurement (voltage or current) referred to as “Y”

• The order of the inputs and outputs in the vector is determined by their name.

Note:

1. The names for all blocks used for input and output must start with the type+index (U01/SW02/Y01) and the “0” cannot be ignored

2. The order of the inputs and outputs must match the index

3. The index must be consecutive (ie. 01,02,03; not 01,03)

Rules of design – Inputs and Outputs

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Building a PSIM model with eHS solver

Example of a valid PSIM model for eHS

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Building a PSIM model with eHS solver

Example of a valid PSIM model for eHS

switches

SW01

SW02

SW03

SW04

SW05

SW06

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Building a PSIM model with eHS solver

Example of a valid PSIM model for eHS

sourcesU01U02

U03

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Building a PSIM model with eHS solver

Example of a valid PSIM model for eHS

measurements

Y01Y02

Y06

Y03

Y05Y04

Y08

Y07

Note: the

snubber resistors

across the

switches are not

required for eHS

simulation; this

may be useful to

prevent

discharge of

output capacitor

for no-load cases

1818

Building a PSIM model with eHS solver

Inserting the PSIM circuit into an RT-LAB Model

• Implements the

driver that

manages all

communication with

the eHS firmware.

• Initializes the solver

and transmission in

real time of the

circuit control

signals (current and

voltage source

control signals,

switching

information of the

switches). Note: You can find more details for eHS dual block in the Matlab-

eFPGAsim Blockset Help (eHS User Guide)

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• This block enables the developer to simulate each part of the circuit with exactly the same eHS solver used for FPGA simulation with the same sample time.

• Users can then compare results expected with eHS with PSIM results using off-line simulation, without using FPGA hardware

• The effect of parasitic inductors and capacitors added by eHS can then be easily assessed

• This block enables the developer to connect the block exactly as it is connected inside the FPGA-based board firmware

• One offline block should be added for each eHS solver core

Building a PSIM model with eHS solver

Offline Simulation

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How to Start

The following toolboxes are needed:• RT-LAB• RT-EVENTS (to simulate accurate controller on CPU)• eFPGAsim (to interconnect the CPU and FPGA and load the bitstream)

Supported FPGA boards:

• OP5600 : ML605 VIRTEX 6

• OP4500: KINTEX 7

• OP5607: VIRTEX 7

• NI cRIO – ZYNQ7020

Software versions:

• RT-LAB v10.6.4.280

• PSIM v9.3 (64 bits)

Requirements

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Create a PSIM Model with eHS supported

blocks

Create a CPU Model Simulink

Save the CPU Model on the same folder

with the PSIM model

Create a RT-LAB Project

Build the model and Load/Execute(XHP mode)

Compare online simulations with PSIM simulations

• Make a Simulink model for

Controller and I/O

• Choose a fixed-step solver,

sample time (Ts)

• Configure parameters of Dual

eHS block

• Add Simulink CPU model to

RT-LAB

• Assign and configure a target to

the model

• Rename elements using the

eHS naming convention

• Select the order of outputs

Step 1

Step 2

Step 3

How to Start

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Case studies

2323

Boost

Case studies

2424

Case studies

Three-phase inverter

2525

Case studies

2626

Case studies

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DEMO

• Boost Converter • PSIM simulation

• eHS offline

• Real-time simulation

• Inverter 3 ph• PSIM simulation

• eHS offline

• Real-time simulation

• Inverter 3 Level (NPC)• Real-time simulation

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LabVIEW Panel

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Prospective

All I/O specifications and acquisition control will be specified, configured and controlled outside of

Matlab/Simulink.

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Prospective – 4Q2014

Create a PSIM Model with eHS supported

blocks

Create a CPU Model Simulink

Save the CPU Model on the same folder

with the PSIM model

Create a RT-LAB Project

Build the model and Load/Execute(XHP mode)

Compare online simulations with PSIM simulations

• Choose fixed-step solver,

sample time (Ts)

• Configure parameters of Dual

eHS block

• Control + I/O

• Add CPU Simulink model

• Assign and configure a target to

the model

• Rename elements using the

eHS naming convention

• Select the order of outputs

Modeling Steps

Step 1

Step 2

Step 3

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Prospective – 4Q2014

Create a PSIM Model with eHS supported

blocks

Create a RT-LAB Project

Build the model and Load/Execute(XHP mode)

Compare online simulations with PSIM simulations

• Assign and configure a target to

the model

• I/O

• Rename elements by using

the eHS naming convention

• Select the order of outputs

Modeling Steps

Step 1

Step 2

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New Workflow

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Select Torque

Select AI_01

Drag & Drop

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Thank You!