Dynamic Vulnerability Assessment and Intelligent Control

Chapter 8Modeling Preventive and Corrective Actions Using Linear Formulation

Tom Van Acker and Dirk Van Hertem

Research Group Electa, Department of Electrical Engineering, University of Leuven, Belgium

8.1 Introduction

Power system reliability management can be defined as a sequence of decisions which are taken under uncertainty in order to meet a certain reliability criterion (see also Chapter 2). A reliability criterion is a principle imposing a basis to determine whether or not the reliability level of a given operating state of the power system is acceptable [1]. This can be expressed as a set of constraints that must be satisfied by the decisions taken by the system operator (SO). An example of such a reliability criterion is the N-1 criterion, which states that the considered power system must be able to withstand any credible single contingency, for example, the loss of a generator, in such a way that a new operational set point can be reached without violating the security constraints of that power system. The SO makes use of flexibility options that are inherent to a power system to reach a new, secure operating point after a contingency. These flexibility options are also referred to as actions and the distinction can be made between preventive and corrective or curative actions.

Preventive actions are those flexibility options preventively activated to adapt the system state. Through preventive actions, a set-point is chosen which is inherently safe and anticipates ...