Cyber-Based Contingency Analysis

Ten, Chee‐Wooi; Ginter, Andrew; Bulbul, Rashiduzzaman

doi:10.1109/tpwrs.2015.2482364

Cited by 41 publications

(36 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The combinations of the substation criticality have been investigated in the recent years on "bottleneck list" in [9] and [10], which essentially assess the risk level for each substation outage by identifying the cases that are criticallyweakened conditions based on presumed attack scenarios. With the consistent representation of terminology in the definition of "critical" cases, the section extends the modeling of relay outages that can be risky to manipulated that may initiate system-wide instability.…”

Section: Risk Modeling Of Relay Outagesmentioning

confidence: 99%

Cyber-Induced Risk Modeling for Microprocessor-Based Relays in Substations

Yang

Ten

2018

2018 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia)

Self Cite

View full text Add to dashboard Cite

Once critical substations are compromised, attack agents can coordinate among their peers to plot for maximizing disruption using local control devices. For defenders, it is critical to enumerate and identify all digital relays to determine the systemic risks. Any combination of disruptive switching via the compromised relays can result in misoperation or immediate effect to the system. The resulting consequence of these attack's initial events would possibly incur cascading failure to a grid. This paper quantifies the criticality of substation protective relays with the combination of the outage level and its corresponding severity risk index. The proposed hypothesized outages are based on the type of protective relaying, bus configuration of a substation, and commonly implemented relaying schemes, such as bus differential, directional overcurrent and distance relays, are studied. This preliminary work also provides three approaches of determination in probabilities for sensitivity analysis. The proposed risk indices are evaluated using IEEE test systems.

show abstract

Section: Risk Modeling Of Relay Outagesmentioning

confidence: 99%

Cyber-Induced Risk Modeling for Microprocessor-Based Relays in Substations

Yang

Ten

2018

2018 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia)

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, Equation (14) is modified to (15) for meeting the relevant requirement of MOSEK, and this modification does not change the feasibility and optimality of the obtained solution although the searching space is expanded:…”

Section: Ecqp Modelmentioning

confidence: 99%

“…Actually, when constraint (14) is replaced by (15), the linear objective function (9) can only achieve its maximum at its boundaries, which are defined by (14) and other linear constraints in (10)- (13). Therefore, this relaxation of constraint (15) still gives the same optimal solutions for (9)- (14).…”

Section: Ecqp Modelmentioning

confidence: 99%

A Security Level Classification Method for Power Systems under N-1 Contingency

Zhang³

et al. 2017

Energies

View full text Add to dashboard Cite

Security assessment is crucial for the reliable and secure operation of power systems. This paper proposes a security level classification (SLC) method to analyze the security level of power systems both qualitatively and quantitatively. In this SLC method, security levels are graded according to a comprehensive safety index (CSI), which is defined by integrating the system margin index (SMI) and load entropy. The SMI depends on the operating load and the total supply capacity (TSC) under N-1 contingency, and the load entropy reflects the heterogeneity of load distribution calculated from entropy theory. In order to calculate the TSC under N-1 contingency considering both of the computational accuracy and speed, the TSC is converted into an extended conic quadratic programming (ECQP) model. In addition, the load boundary vector (LBV) model is established to obtain the capacity limit of each load bus, and thus detect potential risks of power systems. Finally, two modified practical power systems and the IEEE 118-bus test system are studied to validate the feasibility of the proposed SLC method.

show abstract

“…A power network without an EMLN cannot handle heavy power flow conditions as well as one with an EMLN. Moreover, contingency analysis is applicable to power networks regardless of the presence on EMLNs [20][21][22][23][24]. Therefore, these researchers believe that it is not necessary to specifically extract and study EMLNs or to deliberately avoid them.…”

Section: Introductionmentioning

confidence: 99%

Sufficient Condition for the Parallel Flow Problem of Electromagnetic Loop Networks

Yang

Guo

2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

Electromagnetic loop networks (EMLNs) are pervasive in power networks. Their major characteristic is parallel flow. EMLNs with substantial parallel flow are considered to have a parallel flow problem. There is currently a serious disagreement about whether EMLNs have a parallel flow problem, which has resulted in different configurations of national grids. Therefore, this paper proposes a general model of EMLNs and derives the parallel current function, which formulates parallel flow, from the network equations of both the high and low voltage sides of an EMLN. Accordingly, the high and low voltage sides of an EMLN are equivalent to two sets of parallel identical multi-transmission lines. Finally, this paper considers operating margins and derives the sufficient condition under which parallel flow can be ignored. The sufficient condition not only determines whether an EMLN has a parallel flow problem but also reveals simple approaches to visually diminishing parallel flow. If the EMLN satisfies the sufficient condition, parallel flow can be ignored; otherwise, the EMLN needs to operate in a restricted way or to adopt open loop planning.

show abstract

Cyber-Based Contingency Analysis

Cited by 41 publications

References 19 publications

Cyber-Induced Risk Modeling for Microprocessor-Based Relays in Substations

Cyber-Induced Risk Modeling for Microprocessor-Based Relays in Substations

A Security Level Classification Method for Power Systems under N-1 Contingency

Sufficient Condition for the Parallel Flow Problem of Electromagnetic Loop Networks

Contact Info

Product

Resources

About