A Study on the Reliability Evaluation Method of Power System with Massive Penetration of Distributed Generations

2020 ◽  
Vol 140 (6) ◽  
pp. 511-520
Author(s):  
Ryo Yamaguchi ◽  
Yoshiki Nakachi ◽  
Suresh Chand Verma ◽  
Takao Tsuji ◽  
Tsutomu Oyama
Keyword(s):  
Power System ◽  
Evaluation Method ◽  
Reliability Evaluation ◽  
Distributed Generations

scholarly journals A Reliability Evaluation Method for Independent Small Offshore Electric Systems

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3035
Author(s):  
Jun Guan ◽  
Wei Du ◽  
Xiuli Wang ◽  
Xianjue Luo ◽  
Xingyang Liu ◽  
...  
Keyword(s):  
Power System ◽  
Distribution System ◽  
Evaluation Method ◽  
Reliability Evaluation ◽  
Transmission System ◽  
Load Shedding ◽  
Generation System ◽  
Electric System ◽  
Reliability Indicators ◽  
Offshore Oil

As an independent power system, the reliability of offshore electric system is closely related to the smooth progress of offshore oil production. There are two major characteristics of this type of power system. One is that it includes a generation system, transmission system, as well as a distribution system, and the other is that the load shedding measures in the event of a fault are different from that of the onshore power grid. Therefore, traditional reliability assessment models and algorithms cannot be used directly. Based on the theory of overall reliability evaluation, a reliability evaluation method suitable for offshore electric systems and the corresponding reliability indicators are proposed in this paper. In state sampling, the overall system sampling is divided into generation system sampling, transmission system sampling, and distribution system sampling based on the hybrid sampling theory. In state assessment, the priority decoupling load shedding model and the cascade fault model are established considering the actual production. At the end of this paper, the power system of an offshore oil platform is taken as an actual example to calculate the reliability index. Based on the failure analysis, relevant measures to improve the reliability of the system are proposed.

scholarly journals The Reliability Evaluation Method Study of Power System Communication Networks in Case of Ice Storm

Engineering ◽  
2013 ◽  
Vol 05 (09) ◽  
pp. 30-36
Author(s):  
Jianghua Yang ◽  
Huan Teng ◽  
Chonggu Yao ◽  
Nian Liu ◽  
Bin Sun ◽  
...  
Keyword(s):  
Power System ◽  
Communication Networks ◽  
Evaluation Method ◽  
Reliability Evaluation ◽  
Ice Storm ◽  
System Communication

scholarly journals Research on evaluation method of energy supply reliability of regional energy Internet

2021 ◽  
Vol 261 ◽  
pp. 01008
Author(s):  
Pengli Li ◽  
Jian Su ◽  
Tao Yan ◽  
Jiqiu Liu ◽  
Xiaoguang Qi
Keyword(s):  
Power System ◽  
Evaluation Method ◽  
Distribution Network ◽  
Energy Coupling ◽  
Reliability Evaluation ◽  
Evaluation Index System ◽  
Load Reduction ◽  
Energy Internet ◽  
Regional Energy ◽  
Optimal Load

This paper studies the reliability evaluation technology of regional energy Internet and represents a reliability evaluation method considering the optimal load reduction strategy. The application scenario of regional Energy Internet with power system as the core is built. The specific form is that multiple Integrated Energy systems are connected to the superior distribution network through the tie line. The reliability evaluation index system of power system and regional energy Internet is introduced. Based on the modelling of components in the regional energy Internet application scenario in this paper, the operation model and two-state Markov model are mainly established for the renewable energy power generation devices, energy coupling devices and energy storage devices in IES. The optimal load reduction models based on load classification are established for the faults of distribution network lines and the faults of IES internal components connected to the distribution network in regional energy Internet respectively. Through the construction of different application scenarios, the load reduction situation under different faults and different component parameters is analysed, and the corresponding reliability index calculation and result analysis are carried out.

Study on Reliability Evaluation Method of Components without Enough Fault Data

2013 ◽  
Vol 860-863 ◽  
pp. 1886-1890
Author(s):  
Wen Fu Wu ◽  
Hong Xun Tian ◽  
Lin Qi Ma ◽  
Juan Su ◽  
Song Huai Du
Keyword(s):  
Power System ◽  
Evaluation Method ◽  
Sample Selection ◽  
Practical Method ◽  
Reliability Evaluation ◽  
Calculation Model ◽  
Fault System ◽  
Distribution Model ◽  
System Components ◽  
Actual Operation

The reliability assessment of power system components is the key to power system safe and reliable operation. According to the record of actual operation of power system components characteristics, a practical method of reliability evaluation for fault date which is missing components is introduced in this paper. The method is based on Weibull distribution model. It is also a calculation and solving methods of reliability evaluation fault system of missing data components. The system mainly includes sample selection of data, parameter calculation, model checking and failure rate curve drawing. So the transformer as an example, verify the effectiveness of this method. In addition the paper analyses the influencing factors in the transformer reliability, such as voltage grade, manufacturer and product types. In a word, this model provides a systematic and effective method for the practical application of the reliability evaluation of the electrical components.

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