The Experts below are selected from a list of 53274 Experts worldwide ranked by ideXlab platform
Yijia Cao - One of the best experts on this subject based on the ideXlab platform.
-
Modeling and Simulation of Data Flow for VLAN-Based Substation Communication System
Cyber-Physical Energy and Power Systems, 2020Co-Authors: Yijia Cao, Yong Li, Xuan Liu, Christian RehtanzAbstract:The digitalization and networking of secondary equipment for substation have been applied in power system. Based on IEC 61850, the standard for communication in Substations has resolved the interoperability between intelligent electronic devices (IEDs) from different vendors. Thus, the IEDs’ uniform communication standard contributes to the realization of more sophisticated functionality in substation automation systems, which put forward the higher requirement on real-time capability and reliability of the whole automation system. However, there are still several issues unsolved for the simulation, planning, and extension of substation communication network (SCN).
-
modeling and simulation of data flow for vlan based communication in Substations
IEEE Systems Journal, 2017Co-Authors: Zhidan Zhang, Xiaoqing Huang, Bjorn Keune, Yijia CaoAbstract:IEC 61850, the standard for communication in Substations, has resolved the interoperability between intelligent electronic devices (IEDs) from different vendors. Thus, the IEDs' uniform communication standard contributes to the realization of more sophisticated functionality in substation automation systems. However, there are still several issues unsolved for the simulation, planning, and extension of substation communication network (SCN). This paper proposes three kinds of mathematical models for typical data flow within Substations according to IEC 61850, which are cyclic data, stochastic data, and burst data. Thereby, a quantitative analysis of data flow is carried out for a typical substation based on the proposed data models. The advantage of virtual local area network (VLAN) and impacts of system faults, as well as network topologies, on a VLAN-based network are evaluated and simulated by OPNET Modeler. The data flow models are beneficial for the acquisition of more convincing results to assess network performance. Thus, the simulation results for a sample substation can be used to support power utility personnel with the planning and construction process of SCN.
Lixin Wang - One of the best experts on this subject based on the ideXlab platform.
-
Research on Technologies in Smart Substation
Energy Procedia, 2011Co-Authors: Lixin WangAbstract:AbstractA Strong and Smart Grid is the development direction and established target of future grid in China. In respect that Smart Substation is the principal foundation and support of Smart Grid, the research on key technologies about Smart Substations has attracted an increasing amount of attention in the recent years. In this paper, we demonstrate the latest concept, strategy and objective of State Grid for the development of smart substation. Meanwhile, we present our latest research on technologies in Smart Substation
Chen-ching Liu - One of the best experts on this subject based on the ideXlab platform.
-
intrusion detection against mms based measurement attacks at digital Substations
IEEE Access, 2021Co-Authors: Ruoxi Zhu, Junho Hong, Chen-ching Liu, Jiankang WangAbstract:Information and Communications Technology (ICT) supports the development of novel control and communication functions for monitoring, operation, and control of power systems. However, the high-level deployment of ICT also increases the risk of cyber intrusions for Supervisory Control And Data Acquisition (SCADA) systems. Attackers can gain access to the protected infrastructures of the grid and launch attacks to manipulate measurements at the Substations. The fabricated measurements can mislead the operators in the control center to take undesirable actions. The Intrusion Detection System (IDS) proposed in this paper is deployed in IEC 61850 based Substations. The proposed IDS identifies falsified measurements in Manufacturing Messaging Specification (MMS) messages. By cross-checking the consistency of electric circuit relationships at the substation level in a distributed manner, the falsified measurements can be detected and discarded before the malicious packets are sent out of the Substations through DNP3 communication. A cyber-physical system testbed is used to validate the performance of the proposed IDS. Using the IEEE 39-bus test system, simulation results demonstrate high accuracy of the proposed substation-based intrusion detection system.
-
Modeling of Intrusion and Defense for Assessment of Cyber Security at Power Substations
IEEE Transactions on Smart Grid, 2018Co-Authors: Ying Chen, Junho Hong, Chen-ching LiuAbstract:Cyber intrusions to Substations are critical issues to a power grid, which must be defended and mitigated. Essentially, to better understand a cyber intrusion, reconnais- sance activities should be modeled. Then, strategies of cyber attacker and defender can be studied, which help to identify Substations vulnerable to cyber-attacks. In this paper, a suc- cessful intrusion is regarded as a probabilistic event related to reconnaissance activities. Its probability can be approximated by the Poisson distribution of the number of vulnerabilities discovered by the attacker. Furthermore, models of intrusion and defense in competition for control of the Substations are proposed using Markov decision process (MDP). Key character- istics of target substation, attacker and defender are considered for determining probabilistic state transitions related to intru- sion and defense actions. Thus, by solving the MDP models, the optimal strategies (action policies) of both the attacker and defender can be obtained. With these optimal strategies, the cyber security status of a substation can be evaluated within var- ied time frames. The case study validates the proposed models and method, including time-based strategies of the attacker and defender.
-
integrated anomaly detection for cyber security of the Substations
IEEE Transactions on Smart Grid, 2014Co-Authors: Junho Hong, Chen-ching Liu, Manimaran GovindarasuAbstract:Cyber intrusions to Substations of a power grid are a source of vulnerability since most Substations are unmanned and with limited protection of the physical security. In the worst case, simultaneous intrusions into multiple Substations can lead to severe cascading events, causing catastrophic power outages. In this paper, an integrated Anomaly Detection System (ADS) is proposed which contains host- and network-based anomaly detection systems for the Substations, and simultaneous anomaly detection for multiple Substations. Potential scenarios of simultaneous intrusions into the Substations have been simulated using a substation automation testbed. The host-based anomaly detection considers temporal anomalies in the substation facilities, e.g., user-interfaces, Intelligent Electronic Devices (IEDs) and circuit breakers. The malicious behaviors of substation automation based on multicast messages, e.g., Generic Object Oriented Substation Event (GOOSE) and Sampled Measured Value (SMV), are incorporated in the proposed network-based anomaly detection. The proposed simultaneous intrusion detection method is able to identify the same type of attacks at multiple Substations and their locations. The result is a new integrated tool for detection and mitigation of cyber intrusions at a single substation or multiple Substations of a power grid.
-
Anomaly detection for cybersecurity of the Substations
IEEE Transactions on Smart Grid, 2011Co-Authors: Chee Wooi Ten, Junho Hong, Chen-ching LiuAbstract:Cybersecurity of the Substations in a power system is a major issue as the Substations become increasingly dependent on computer and communication networks. This paper is concerned with anomaly detection in the computer network environment of a substation. An anomaly inference algorithm is proposed for early detection of cyber-intrusions at the Substations. The potential scenario of simultaneous intrusions launched over multiple Substations is considered. The proposed detection method considers temporal anomalies. Potential intrusion events are ranked based on the credibility impact on the power system. Snapshots of anomaly entities at Substations are described. Simulation results using the modified IEEE 118-bus system have shown the effectiveness of the proposed method for systematic identification. The result of this research is a tool to detect cyber-intrusions that are likely to cause significant damages to the power grid.
Mladen Kezunovic - One of the best experts on this subject based on the ideXlab platform.
-
Substation fault analysis requirements
2010 Innovative Smart Grid Technologies (ISGT), 2010Co-Authors: Mladen KezunovicAbstract:Substation automation has critical role in power systems. Substations are responsible for protection, control and monitoring functions that allow robust routing of power from generators to loads through a complex network of transmission lines. With the latest technology development, many intelligent electronic devices (IEDs) available in Substations today are capable of performing enhanced functionalities beyond what their basic function is. This brings an opportunity for adding new functionalities that go well beyond what the traditional substation automation solutions have provided.
-
Substation fault analysis requirements
2009 IEEE Power & Energy Society General Meeting, 2009Co-Authors: Mladen KezunovicAbstract:Substation automation has critical role in power systems. Substations are responsible for many protection, control and monitoring functions that allow robust routing of power from generators to loads through a complex network of transmission lines. With the latest technology development many intelligent electronic devices (IEDs) available in Substations today are capable of performing enhanced functionalities beyond what their basic function is. This brings an opportunity for adding new functionalities that go well beyond what the traditional substation automation solutions have provided. This presentation summarizes requirements for automated fault analysis functions that may be performed in Substations in the future. Particular focus is on requirements for implementing a new concept of merging operational and non-operational data with a goal of improving fault analysis. The requirements are aimed at expanding the substation automation role in automated fault analysis towards better serving many utility groups: operations, protection and asset management.
-
Automated monitoring functions for improved power system operation and control
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521), 2004Co-Authors: Mladen Kezunovic, G. LatiskoAbstract:This paper describes how new functions can be developed for automated analysis of data collected in Substations of an electric power system. The new functions are first defined and architecture of the integrated substation application is proposed. Database and user interfacing needs are also presented. Once fully implemented, this solution will serve both local and remote functions allowing further benefits to be drawn from the concept of substation data integration and information exchange.
Juan Felipe Botero - One of the best experts on this subject based on the ideXlab platform.
-
S3N - Smart Solution for Substation Networks, an Architecture for the Management of Communication Networks in Power Substations
2016Co-Authors: Erwin Leal, Juan Felipe BoteroAbstract:Today, the communications network has become an essential element to the operation of any type of organization or infrastructure, such is the case of the electrical power Substations. Such networks in particular, demand high levels of availability and reliability, as the substation is a key element in the chain of energy generation and distribution. However, although recent network modernization introduced new features that allow to optimize the operation of the substation, the variety of devices that integrate it (Intelligent Electronic Devices - IED: breakers, switches, Protection and Control, Merging Units - MU, Network Switches, IEEE 1588 Master Clock) and the huge set of application-level protocols (SMV - Sample Measure Value, GOOSE - Generic Object Oriented Substation Event, MMS - Manufacturing Message Specification, PTP - Precision Time Protocols, among others), increase the management complexity. In this context, the Applied Telecommunications Research Group (GITA), has decided to propose the development of S3N - Smart Solution for Substation Networks. S3N is defined as a network architecture that introduces the novel Software Defined Networks (SDN) and virtualization technologies, in order to simplify the management of communication networks in power Substations.
-
AIMS - S3N - Smart Solution for Substation Networks, an Architecture for the Management of Communication Networks in Power Substations
Management and Security in the Age of Hyperconnectivity, 2016Co-Authors: Erwin Alexander Leal, Juan Felipe BoteroAbstract:Today, the communications network has become an essential element to the operation of any type of organization or infrastructure, such is the case of the electrical power Substations. Such networks in particular, demand high levels of availability and reliability, as the substation is a key element in the chain of energy generation and distribution. However, although recent network modernization introduced new features that allow to optimize the operation of the substation, the variety of devices that integrate it Intelligent Electronic Devices - IED: breakers, switches, Protection and Control, Merging Units - MU, Network Switches, IEEE 1588 Master Clock and the huge set of application-level protocols SMV - Sample Measure Value, GOOSE - Generic Object Oriented Substation Event, MMS - Manufacturing Message Specification, PTP - Precision Time Protocols, among others, increase the management complexity. In this context, the Applied Telecommunications Research Group GITA, has decided to propose the development of S3N - Smart Solution for Substation Networks. S3N is defined as a network architecture that introduces the novel Software Defined Networks SDN and virtualization technologies, in order to simplify the management of communication networks in power Substations.
