The OpenDSS is an electric power Distribution System Simulator (DSS) for supporting distributed resource integration and grid modernization efforts. See Mediawiki App for latest news. NOTE: Mediawiki App has been discontinued by SourceForge. We are looking for a new host. Stay tuned for more details...
Key pages from the Mediawiki site have been printed to PDF and posted here:
See:
User Manual
OpenDSS Primer written by a user
OpenDSS Cheatsheet
What is Unique About OpenDSS?
A common question we receive is "What is unique about OpenDSS?" This is a fair question since there are many other distribution system analysis programs available. Here are some things that are generally different than most typical electric power distribution system analysis tools in common use today.
• A Fault is simply another circuit element – a simple resistive element. Many distribution system analysis tools have a completely separate tool for short circuit analysis. There are many complex algorithms for performing short circuit studies in these tools. In OpenDSS, one simply defines a Fault object at one of the buses. The power flow solution will often converge with a fault on the system, which is unimaginable in other more traditional tools. And there is nothing special about multiple simultaneous faults: simple define multiple Fault objects and execute the Solve command.
• Per units and symmetrical components are not used in the solution algorithm. Voltages, currents, and impedances are modeled in actual volts, amps, and ohms, respectively. While this is not necessarily unique among distribution system analysis programs in North America, the absence of symmetrical components in the solution algorithm still makes OpenDSS fairly unique. Some circuit elements can be defined using sequence impedances, but those are immediately converted into phase domain matrices. Also, the results can be presented in sequence values, at least for the first 3 phases of a bus (symmetrical components are undefined if the number of phases is not 3).
Modified
29 August 2014
Last edit: Roger Dugan 2014-08-29
Voltage Base Rules
With several new users since the global virtual training sessions in August 2020, it is useful to review the OpenDSS voltage base rules since they are different than many other programs: