Reliability evaluation of the new generation smart substation considering relay protection system

2016 ◽  
Author(s):  
Ji Zhang ◽  
Qiaoping Kang ◽  
Dawei Huang ◽  
Xiuwen Xiong ◽  
Yang Liu ◽  
...  
Keyword(s):  
Relay Protection ◽  
Reliability Evaluation ◽  
Protection System ◽  
New Generation ◽  
Smart Substation

Reliability Evaluation of Main Electrical Connection for the Smart Substation with DCB

2014 ◽  
Vol 521 ◽  
pp. 453-456
Author(s):  
Yang Qi Huang ◽  
Jian Hua Zhang ◽  
Xin Yi Lu ◽  
Nian Liu
Keyword(s):  
Smart Grid ◽  
Research And Development ◽  
Reliability Evaluation ◽  
Design Concept ◽  
Electrical Connection ◽  
Minimal Cut Set ◽  
Execution Unit ◽  
Cut Set ◽  
New Generation ◽  
Smart Substation

As an important part of smart grid, smart substation is the acquisition source of operating data and command execution unit, and also acts as the important foundation and support of smart grid. With the continuous deepening of smart substation construction in State Grid Corporation, the overall integration design concept of the new generation smart substation based on research and development of new equipment has been put forward, realizing the main electrical connection optimization and improvement of reliability .Concerning the characteristic and application of DCB in smart substation, reliability of three kinds of typical main electrical connection schemes in existing substation and smart substation is calculated by the minimal cut-set method in this paper.

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.

scholarly journals Power supply risk assessment method for relay protection system faults

2016 ◽  
Vol 65 (4) ◽  
pp. 803-814
Author(s):  
Si Tuyou ◽  
Wu Jiekang ◽  
Yuan Weideng ◽  
Du Anan
Keyword(s):  
Power Supply ◽  
Distribution Systems ◽  
Probability Model ◽  
Relay Protection ◽  
Assessment Method ◽  
Protection System ◽  
Supply Risk ◽  
Load Power ◽  
Risk Assessment Method ◽  
Protection Systems

Abstract The influence and the potential risk due to hidden faults of a relay protection system on power supply in distribution systems are paid more and more attention to. A probability analysis method is used to analyse fault characteristics and action mechanism of dominant faults, hidden misoperation and non-operation of the relay protection systems, and failure probability model of relay protection system is constructed and simplified. The effects of dominant faults, hidden misoperation and non-operation of the relay protection systems on the reduced power supply load power are analysed, and a probabilistic model for reduced power supply load power is constructed by three parts corresponding to dominant faults, hidden misoperation and non-operation. A probability calculation method of power supply risk occurrence due to hidden faults of relay protecttion system is proposed considering the fault probability of the relay protection systems, the frequency of the hidden faults occurring in operation period, the reduced power supply load power or load power outage, and the connection mode of the in-lines, out-lines and transformers in a substation. The feasibility and applicability of the proposed method for estimation of risk value probability of the relay protection systems is verified by two studied examples.

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