Reliability Analysis of Multinode Power Systems

This chapter introduces reliability measures and component models used in multinode power systems. The methods used in multinode power system reliability evaluation can be either deterministic or probabilistic. The chapter discusses the component models and the various methods of evaluation of reliability. A common mode outage is an event where multiple outages occur because of one external cause. An example of a common mode outage is the failure of two parallel circuits resulting from an ice storm. The chapter describes the power flow models: capacity flow model, DC load flow model, and AC load flow model. In the event of loss of load, two emergency action policies are recognized: load loss sharing (LLS) policy and no load loss sharing (NLLS) policy. In most multi‐area agreements, the NLLS policy is exercised. In composite system studies, these constraints do not enter into the modeling considerations.