GMB Training 2014 Indien

For internal use only / Siemens AG 2012. All rights reserved.

Dynamic Modeling using

the Graphical Model Builder

(PSSGMB) Release 3.0 Du08/10/2012

Siemens Power Technologies

International

www.siemens.com/energy/power-technologies

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Siemens Power Transmission & Distribution, Inc., PSSGMB 0-4

Introduction

What is PSSGMB ?

The Graphic Model Builder (PSSGMB) is sold as a separate PSSE

add-on module to the PSSE base that allows PSSE users to

graphically build user models for dynamic simulation without having the

need to writing and compiling high level language programs (e.g.

FORTRAN).

PSSGMB works with PSSE, Rev. 30.3.2 and newer

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Introduction

What is PSSGMB ?

PSSGMB uses the

Microsoft Visio graphical

interface to draw and

simulate dynamic models of

exciters and turbine

governors, with other model

categories added in future

releases.

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Introduction

What is PSSGMB ?

GMB provides in its library

predefined graphic elements and

their associated control model to

represent fundamental control

blocks like Time-delay, limits

summing, product, math and non-

linear functions, output, and many

additional control functions.

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Introduction

What is PSSGMB ?

You are free to add FORTRAN statements to your model, which are then

interpreted by PSSGMB without the need of an additional compiler.

The total number of user-defined models (traditional FORTRAN based

user-defined models plus user-defined models created using PSSGMB)

that can be handled in PSSE is defined in the PSSE Program

Operation Manual.

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VISIO Standard and VISO Professional1: 1VISIO Standard and VISIO Professional are Microsoft products and are

not supplied with the PSSGMB

With VISIO Standard, business-related diagrams such as flowcharts,

organization charts, and project scheduling diagrams can be created.

VISIO Professional contains all of what the standard edition has, plus

features which allow to create technical diagrams e.g. building plans,

network diagrams, software diagrams, Web diagrams or engineering

diagrams.

PSSGMB Basics

PSSGMB needs only VISIO Standard to work !

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PSSGMB Basics

PSSGMB and NETCAD:

PSSGMB has been originally developed as a part of NETCAD (the

graphical editor for PSSNETOMAC) and is now available as the

standalone tool GMB.

NETCAD allows to completely design a power network using predefined

and user defined graphical block elements and is only a passive editor.

No calculation is done in NETCAD. After finishing the design the user

must invoke PSSNETOMAC for the simulation.

GMB is an ACTIVE editor and comprises two parts, NETCAD with an

ensemble of NETCAD-elements (especially controller blocks) to draw

the models and the BOSL engine, that performs the GMB model

calculation during simulation.

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PSSGMB Basics

PSSGMB and PSSE:

PSSGMB has an interface to PSSE and uses a special API to

communicate with PSSE. The data input is done via dyre records

or directly with the help of the GUI of PSSE.

The initial and the momentary values of the input variables for the

PSSGMB model are coming from PSSE

The calculation of the PSSGMB model(s) during initialization and

simulation is done by the BOSL engine

The output of the model(s) is sent to the appropriate machine or

network element in PSSE

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Starting GMB by

clicking on the

icon on the windows desktop or

on Run PSSGMB in the win-

dows/PSSNetCad start menu

opens the GMB- desktop

showing either the last treated

GMB file, e.g.

PSSGMB Basics

c:\Program files(x86)\PTI\Netcad\GettingStarted\Examples\Example1\Esac8c\Esac8c.vsd

or an empty GMB-screen

Working with PSSGMB :

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PSSGMB Basics


Vsd is the file extension of all PSSGMBmodels,

drawn in Visio.

The filenames of PSSGMBmodels are limited to

sixteen characters plus extension, and will be used as

the model name when referencing this model in the

PSSE DYRE data record.

PSSGMB additionally generates a mac file with

the same file name as the PSSGMB file, but with

extension mac. The mac file is an ASCII file that

contains the description of the controller structure.

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PSSGMB Basics


Creating a controller like shown here is pretty easy. The used shapes (in

this example, the controller blocks) are already ready for use. All you have

to do is drag them into place and connect them with connectors, add

some parameters and resize them a little bit, if necessary.

The following slides will explain, how to

use all the tools of the PSSGMB.

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GMB-Menu

Stencils with

shapes

Drawing

page

GMB-

Buttons

PSSGMB Basics

The Desktop:

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The PSSGMB menu: BOSL

The BOSL menu allows to:

- Run the Standalone BOSL

- Display Initial Conditions of

the block elements

- Debug Initial Conditions of

the project

- Debug Controller using Debug log

- Set BOSL Options like choice of

dropping shapes with transfer

functions or set nominal frequency

- Set BOSL Controls like Timestep

and calculation period

- Save Model to new folder

- Display Help on BOSL texts

PSSGMB Menus

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The PSSGMB Toolbar

PSSGMB Menus

E dit the data of the marked shape

C hange shape IC ON to text and vise versa

C onnect links

C reate subsystem (macro in a new page or US E R master)

Toggle the BOS L stencils

P rotect/unprotect connections

split connectors to links

C opy/paste marked elements with data to/from clipboard

E dit/change connections

S how the data file of the macro

The PSSGMB BOSL buttons help to quickly reach specific

BOSL-functions

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Setting PSSGMB Options:

Before starting with the design of a GMB

model, please choose the appropriate options

of the GMB menu BOSL-Options. You can

here change the non numeric prefix for shape

output labels (should be normally set to $),

set the Nominal frequency which is used as

f.0 in some BOSL shapes. You can choose

the GMB-option Start with recent file, decide

about your shape layout for standard shapes

(transfer function or DIN) and set debug

conditions.

Note: Do not forget to choose your preferred editor !

Creating a new project with PSSGMB

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Creating a file in a new directory

To create a new PSSGMB project do:

1.)Choose File-New in the GMB

menu

2.) Choose a new project directory and

a new filename

Note: Filenames for PSSGMB must

be entered without extension and must

not have more than 16 characters !


Result:

- a new, empty drawing file with all necessary associated files

is created (.vsd,.mac,/ctl/.syn)

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Using layers for the new model

Layers can help to bring order

in your PSSGMB -model.

To use layers:

1.) click on the GMB layer

button and choose New

2.) Give the new layer a name

and adapt the layer attributes

3.) Decide how many layers

you need and create them


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Setting of the simulation control

BOSL control data can be

entered with the GMB menu

option BOSL - Controls...

from the Formatting toolbar. The

time step and End time is

needed only for BOSL

standalone runs and are not

used in PSSE dynamic

simulation.


Attention: For BOSL tests

please adapt carefully the

time step to the time

constants of the used

controllers !

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Drawing a simple PSSGMB -controller

To create the simple GMB controller on the

left please open a new file test1 and:

1.) Drop the standard shape Input

(ECOMP) on the drawing page and set the

Constant Output Value for Standalone to 2

2.) Add a SUM shape and set its fixed value to 0

3.) Add an INTEGRATOR with an integration time of #T1 and

Data: Def. 1, Min. 0.1,Max. 10; Description (for PSSE: T1)

4.) Add a plot shape and an Efd output shape.

5.) Choose the Simulation End Time 2.0 s and a step width of 0.01s

6.) Add an Event from the PSS_Standard stencil


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Verifying the Input data for the variables

Click twice on the integrator shape to open the shape Data menu.

Choose now Control - Show Input Data from the Data toolbar to

show a new window with all variable data (see next slide).


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Verifying the Input data for the variables

You can now see the data of your variable(s) including the description

with the name, which will be used in PSSE.

You can also change the order of the variables (is initially sorted

according to the data input) .


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Viewing the macro-file

The macro file created automatically by PSSGMBcan be

examined by clicking on the Show-Data-File-button in the

PSSGMB Toolbar. This will open the macro-file (Test1.mac) with

the editor you have configured in the GMB menu BOSL-Options.


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Run the Standalone test of test1.vsd

You can now verify the different signals of your model by running

BOSL using BOSL Run BOSL of the PSSGMBmenu.

Change simulation step width and shape data as desired and

observe the different signals.

Standalone test of the designed model

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DYRE Data Records for GMB Models:

To use your PSSGMBmodel in PSSE, you must place the mac

and vsd files in your working directory and create (or change) the

DYRE file for your dynamic simulation. Another possibility is to add

your model to your PSSE simulation using the GUI of PSSE

The general structure of DYRE data records for a PSSGMB model

would look as follows:

USRMBL , Model, DS1 , DS2, DS3 /

where USRMBL is a new keyword to be used in the PSSE DYR

file for PSSGMB models.

Note: The name USRMBL has to be specified within single quotes.

Using the Test Model in PSSE simulation

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Adding PSSGMB models to a PSSE dynamic simulation case using

the GUI of PSSE Since PSSE 33 you can directly add GMB models to PSSE


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Adding PSSGMB models to a PSSE dynamic simulation case using

the GUI of PSSE 1.) Open snapshot (via "File" "Open"

and select the snapshot file option

from the pull down menu) and open

the file esac8c.snp in the

"/Example1/"- folder.

2.) Add the new controller to your

machine by doing a "RIGHT"-click on

the cell, where you want to place a

new controller (e.g. EXCITER machine

GENCLS). Choose "ADD/REPLACE

MODEL" in the appearing menu and

choose then the desired GMB model.

You must then enter all the values for

the model CONs and ICONs.


IC SG SE PTI


Siemens Power Transmission & Distribution, Inc., PSSGMB 2012-03 Author Page 215

Thank you for your attention!


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