South Dakota State UniversityElectrical Engineering and Computer Science

Remediation Strategies after Disruptive

Switching Cyberattacks

Wei Sun, Assist. Prof., South Dakota State Univ.

Yunhe Hou, Assist. Prof., The Univ. of Hong Kong

Chee-Wooi Ten, Assist. Prof., Michigan Tech. Univ.

Arlington, VA, July 26, 2014

NSF-PEEC Workshop of Power and Energy Education

Transforming Cyber-Physical Systems Education with Emphasis on the Power Grid

South Dakota State UniversityElectrical Engineering and Computer Science

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A four-layer system, including cyber-vulnerability evaluation, emergency control, restoration, and planning, is designed to provide remediation strategies for protecting and restoring power systems after the attack incidents.

A strategic defense system will be developed to enhance system reconfigurability and survivability from disruptive switching actions by a cyber intruder.

Joint education and research activities among three universities in U.S. and China.

Overview

South Dakota State UniversityElectrical Engineering and Computer Science

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Strategies

Strategic Defense System

Planning Strategy

Restoration

Strategy

Emergency

Strategy

Cyber-Vulnerabilit

y Evaluation

Identify vulnerable

components

Defensive emergency control

Real-time adaptive actions

Optimal cyber- syst.

planning

South Dakota State UniversityElectrical Engineering and Computer Science

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IEEE 30-bus system is used for illustration of the strategic defense system

1. Cyber-Vulnerability Evaluation provides the list of substations with high risk: substations 9, 12, 25, 27.

2. Emergency Control provides optimal defensive actions to reduce the probabilities of being intruded successfully.

3. Restoration Strategy provides optimal restoration actions, and identify more vulnerable substations 12 and 27.

4. Planning Strategy provides the optimal planning to minimize the risk of potential attacks subject to available resources.

Demonstration

57

58

59

Optimal Value

Possible Strategies

Equ

ival

ent l

oss

of lo

ad

0 5 10 15 20 25 30 35 40 45 500

50

100

150

200

250

300

350

Restoration Time (pu)

Gen

erat

ion

Out

put

(MW

)

Compration of Generation Capability Curves

Base Case,Lose Sub 9,Lose Sub 25

Lose Sub 12Lose Sub 27

1 2 3 4 5 61.9

2

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9x 10

4

Substation Restored Time (hr)

Sys

tem

Gen

erat

ion

Cap

abili

ty (

MW

h)

Comparison of Two Vulnerbale Substations

Substation 12

Substation 27