Contingency Analysis: Terms

 

Contingency – Contingencies are the basis of the Contingency Analysis tool. A single contingency can contain a single contingency element (often referred to as n-1 contingencies) or multiple contingency elements.

Contingency Action - A statistically likely condition that could occur during power system operation. See Available Contingency Actions for a listing of actions supported by Simulator.

Contingency Block – This is a legacy feature. Remedial Actions should be used instead. A list of Contingency Actions. A Contingency Block can be applied to individual Contingencies by including the block as a Contingency Element.

Contingency Definition – A listing of the Contingency Elements assigned to a Contingency.

Contingency Element – Consists of a single Contingency Action and its associated Model Criteria, Status and Comment (optional). Multiple Contingency Elements can be defined for a single Contingency.

Global Action – This is a legacy feature. Remedial Actions should be used instead. A Global Action is a list of contingency elements that occur for ALL contingencies unless an Inclusion Filter is specified that allows defining with which contingencies the action will be included. The elements included in a Global Action do not have to be entered as individual elements in each contingency.

Model Criteria – Criteria under which a contingency action will occur. For example, the user can specify that a generation outage only occur if the pre-contingency flow on a line is higher than a specified amount. Simulator allows you to define Model Criteria, which consist of both Model Conditions and Model Filters. Normally, no Model Criteria will be specified for a given action.

Remedial Action – A Remedial Action is a is a group of contingency actions that will be processed with EACH contingency.