Exploring the Optimum Proactive Defense Strategy for the Power Systems from an Attack Perspective

Table 1

Summary of symbols and meaning.

Symbols	Meaning
t	The cost of a large-scale attack
t − Δt	The cost of a small-scale attack
p − Δp	The cost of a partial-defense
q	The benefit made by the attacker with launching a large-scale attack when the defender is in a state of complete-defense
q + Δq	The benefit made by the attacker with launching a large-scale attack when the defender is in a state of partial-defense
q + nΔq	The benefit made by the attacker with launching a large-scale attack when the defender is in a state of no-defense
q	The benefit made by the attacker with launching a small-scale attack when the defender is in a state of partial-defense
q + Δq	The benefit made by the attacker with launching a small-scale attack when the defender is in a state of no-defense
l	Inherent loss
s	The total benefit obtained by the defender using its own assets