scholarly journals Risk Assessment of Smart Substation Relay Protection System Based on Markov Model and Risk Transfer Network

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1777
Author(s):  
Dongliang Nan ◽  
Weiqing Wang ◽  
Rabea Jamil Mahfoud ◽  
Hassan Haes Alhelou ◽  
Pierluigi Siano ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Markov Model ◽  
Evaluation Method ◽  
Relay Protection ◽  
Protection System ◽  
Stable Operation ◽  
Risk Transfer ◽  
State Evaluation ◽  
Smart Substation

To effectively guarantee a secure and stable operation of a smart substation, it is essential to develop a relay protection system considering the real-time online operation state evaluation and the risk assessment of that substation. In this paper, based on action data, defect data, and network message information of the system protection device (PD), a Markov model-based operation state evaluation method is firstly proposed for each device in the relay protection system (RPS). Then, the risk assessment of RPS in the smart substation is carried out by utilizing the risk transfer network. Finally, to highly verify the usefulness and the effectiveness of the proposed method, a case study of a typical 220 kV substation is provided. It follows from the case study that the developed method can achieve a better improvement for the maintenance plan of the smart substation.

Risk Assessment of Relay Protection Setting Value in Power Plant

2013 ◽  
Vol 373-375 ◽  
pp. 1345-1348 ◽  
Author(s):  
Zong Jiang Mu ◽  
Yan Xu ◽  
Shao Bo Yan
Keyword(s):  
Risk Assessment ◽  
Power Plant ◽  
Potential Risk ◽  
Risk Evaluation ◽  
Evaluation Method ◽  
Relay Protection ◽  
Stable Operation ◽  
Protection Device ◽  
Safe Operation ◽  
Risk Assessment And Analysis

Power plant relay protection setting value of the hidden harm causes of relay protection device is not correct, safe and stable operation of the power plant. In this paper, from the angle of the safe operation of power plant, the hidden danger to plant with the protection setting is studied and then the risk evaluation method of power plant relay protection setting values of hidden trouble is proposed. From the power plant relay protection setting value considering two aspects of probability and consequences of potential outbreak of different values, value potential risk is considered, and of a certain power plant in Hubei was made the risk assessment and analysis, in order to verify the theoretical rationality and accuracy.

Research and Summary on Reliability of Relay Protection System

2012 ◽  
Vol 433-440 ◽  
pp. 6755-6759
Author(s):  
Jing Jing Zhang
Keyword(s):  
Power System ◽  
Telecommunication Network ◽  
Operation Mode ◽  
Relay Protection ◽  
Electric Power System ◽  
Protection System ◽  
Input Circuit ◽  
Stable Operation ◽  
Automatic Equipment ◽  
Research Survey

In electric power system, relay protection system can powerfully safeguard secure and stable operation of the first circuit equipment; it’s an important task to ensure reliable operation of protection system. Research on reliability of it now arises much attention at home and abroad. The paper carries out detailed research survey on reliability of relay protection system, which contains AC input circuit, digital relay protection equipment and operation output circuit. In general it also contains automatic equipment and telecommunication network etc. It belongs to repairable system; state-space method and fault-tree method are main analysis methods. Each protection has its own principle and structure, the modeling of which is different. The paper discusses the reliability modeling and index system of protection system from three aspects, whose failure models are hardware and software construction, main protection and backup protection construction and construction with relation to operation mode of power system. With the vigorous development of DG in smart grid, the prospects of reliability evaluation of wide area adaptive protection system are presented.

scholarly journals State evaluation of relay protection system for state maintenance

2019 ◽  
Vol 354 ◽  
pp. 012120
Author(s):  
J F Wang ◽  
P W Yang ◽  
X L Chen ◽  
Z Ren ◽  
X Y Wang ◽  
...  
Keyword(s):  
Relay Protection ◽  
Protection System ◽  
State Evaluation

DGMM Based Network Traffic Prediction for Smart Substation

2013 ◽  
Vol 339 ◽  
pp. 401-408
Author(s):  
Jin Wang ◽  
Zeng Kai Wang
Keyword(s):  
Decision Making ◽  
Performance Analysis ◽  
Markov Model ◽  
Network Traffic ◽  
Network Performance ◽  
Relay Protection ◽  
Traffic Prediction ◽  
Secondary Circuit ◽  
Prediction Approach ◽  
Smart Substation

Compared with traditional substation, smart substation process layer network, which has the same meaning as relay protection and safety automatic devices, is actually equivalent to the secondary circuit of traditional substation protection. Once an exception occurs in the network traffic of process layer, it will directly affect the reliability, rapidity and agility of relay protection action. According to the characteristics of network traffic of smart substation, this paper proposed a novel dynamic grey Markov model (DGMM) based network traffic prediction approach, which could assist decision making for the network performance analysis and prediction, network failures and viruses invasion warning of smart substation. Experiments demonstrated the effective and efficiency of the proposed approach, which could guarantee the security operation of power grid.

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