PowSyBl Core

PowSyBl (Power System Blocks) is an open source framework written in Java, that makes it easy to write complex software for power systems’ simulations and analysis. Its modular approach allows developers to extend or customize its features.

PowSyBl is part of the LF Energy Foundation, a project of The Linux Foundation that supports open source innovation projects within the energy and electricity sectors.

Read more at https://www.powsybl.org !

This project and everyone participating in it is governed by the PowSyBl Code of Conduct. By participating, you are expected to uphold this code. Please report unacceptable behavior to [email protected].

PowSyBl vs PowSyBl Core

This document describes how to build the code of PowSyBl Core. If you just want to run PowSyBl demos, please visit https://www.powsybl.org/ where downloads will be available soon. If you want guidance on how to start building your own application based on PowSyBl, please visit the tutorials page.

The PowSyBl Core project is not a standalone project. Read on to learn how to modify the core code, be it for fun, for diagnosing bugs, for improving your understanding of the framework, or for preparing pull requests to suggest improvements! PowSyBl Core provides library code to build all kinds of applications for power systems: a complete and extendable grid model, support for common exchange formats, APIs for power simulations an analysis, and support for local or distributed computations. For deployment, powsybl-core also provides iTools, a tool to build cross-platform integrated command-line applications. To build cross-platform graphical applications, please visit the PowSyBl GSE repository https://github.com/powsybl/powsybl-gse page.

Environment requirements

Powsybl-core project is fully written in Java, so you only need few requirements:

• JDK (17 or greater)
• Maven (3.8.1 or greater) - you could use the embedded maven wrapper instead if you prefer (see Using Maven Wrapper)

To run all the tests, simply launch the following command from the root of the repository:

$> mvn package

Modify some existing tests or create your own new tests to experiment with the framework! If it suits you better, import the project in an IDE and use the IDE to launch your own main classes. If you know java and maven and want to do things manually, you can also use maven directly to compute the classpath of all the project jars and run anything you want with it.

Read Contributing.md for more in-depth explanations on how to run code.

Read Install to generate an installed iTools distribution, a standalone external folder that contains all the built objects required to run powsybl programs.

Install

An iTools distribution can be generated and installed. The installation is a standalone external folder that contains all the built objects required to run powsybl programs through the itools command-line interface. This repository contains the install.sh script to do so easily. By default, the install.sh will compile code and copy the resulting iTools distribution to the install folder.

$> ./install.sh

A more detailled description of the install.sh script options follows:

Targets

Target	Description
clean	Clean modules
compile	Compile modules
package	Compile modules and create a distributable package
install	Compile modules and install it
docs	Generate the documentation (Javadoc)
help	Display this help

Options

The install.sh script options are saved in the install.cfg configuration file. This configuration file is loaded and updated each time you use the install.sh script.

Global options

Option	Description	Default value
--help	Display this help
--prefix	Set the installation directory	$HOME/powsybl
--mvn	Set the maven command to use	mvn

Default configuration file

#  -- Global options --
powsybl_prefix=$HOME/powsybl
powsybl_mvn=mvn

Using Maven Wrapper

If you don't have a proper Maven installed, you could use the Apache Maven Wrapper scripts provided. They will download a compatible maven distribution and use it automatically.

Configuration

Configure the access to the maven distributions

In order to work properly, Maven Wrapper needs to download 2 artifacts: the maven distribution and the maven wrapper distribution. By default, these are downloaded from the online Maven repository, but you could use an internal repository instead.

Using a Maven Repository Manager

If you prefer to use an internal Maven Repository Manager instead of retrieving the artefacts from the internet, you should define the following variable in your environment:

• MVNW_REPOURL: the URL to your repository manager (for instance https://my_server/repository/maven-public)

Note that if you need to use this variable, it must be set for each maven command. Else, the Maven Wrapper will try to retrieve the maven distribution from the online Maven repository (even if one was already downloaded from another location).

Using a proxy to access the Internet

If you don't use an internal Maven Repository, and need to use a proxy to access the Internet, you should:

1. configure the proxy in your terminal (on Linux/MacOS, you can do it via the http_proxy and https_proxy environment variables). This is needed to download the Maven Wrapper distribution ;

2. execute at least once the following command:

./mvnw -DproxyHost=XXX -DproxyPort=XXX -Dhttp.proxyUser=XXX -Dhttp.proxyPassword=XXX -Djdk.http.auth.tunneling.disabledSchemes= clean

Notes:

• The 4 XXX occurrences should be replaced with your configuration;
• The -Djdk.http.auth.tunneling.disabledSchemes= option should be left empty;
• Windows users should use mvnw.cmd instead of ./mwn.

This second step is required to download the Maven distribution.

Once both distributions are retrieved, the proxy configuration isn't needed anymore to use ./mvnw or mvnw.cmd commands.

Checking your access configuration

You could check your configuration with the following command:

./mvnw -version

If you encounter any problem, you could specify MVNW_VERBOSE=true and relaunch the command to have further information.

Configuring install.sh to use maven wrapper

To indicate install.sh to use Maven Wrapper, you need to configure it with the --mvn option:

./install.sh clean --mvn ./mvnw

You can revert this configuration with the following command:

./install.sh clean --mvn mvn

Usage

Once the configuration is done, you just need to use ./mvnw instead of mvn in your commands.