scholarly journals Reliability assessment for electrical power generation system based on advanced Markov process combined with blocks diagram

2021 ◽  
Vol 11 (5) ◽  
pp. 3647
Author(s):  
A. A. Tawfiq ◽  
M. Osama abed El-Raouf ◽  
A. A. El-Gawad ◽  
M. A. Farahat
Keyword(s):  
Power Generation ◽  
Markov Chain ◽  
Markov Process ◽  
Power System ◽  
System Reliability ◽  
Electrical Power ◽  
Reliability Assessment ◽  
Generation System ◽  
Reliability Indices ◽  
Power Generation System

This paper presents the power generation system reliability assessment using an advanced Markov process combined with blocks diagram technique. The effectiveness of the suggested methodology is based on HL-I of IEEE_EPS_24_bus. The proposed method achieved the generation reliability and availability of an electrical power system using the Markov chain which based on the operational transition from state to state which represented in matrix. The proposed methodology has been presented for reliability performance evaluation of IEEE_EPS_24_bus. MATLAB code is developed using Markov chain construction. The transition between probability states is represented using changing the failure and repair rates. The reduced number of generation system are used with Markov process to assess the availability, unavailability, and reliability for the generation system. Additionally, the proposed technique calculates the frequency, time duration of states, the probability of generation capacity state which get out of service or remained in service for each state of failure, and reliability indices. A considerable improvement in reliability indices is found with using blocks diagram technique which is used to reduce the infinity number of transition states and assess the system reliability. The proposed technique succeeded at achieving accurate and faster reliability for the power system.

Integrating MT30 Into the UK’s Future Aircraft Carrier: Power at the Heart of the Electric Propulsion System

2008 ◽  
Author(s):  
Roy Casson
Keyword(s):  
Power Generation ◽  
Power System ◽  
Gas Turbine ◽  
Electric Propulsion ◽  
Electrical Power ◽  
Propulsion System ◽  
Main Body ◽  
Generation System ◽  
Aircraft Carrier ◽  
Power Generation System

At 65,000 tonnes Britain’s new carrier (CVF) represents a step change in British force projection capability, able to embark more than 30 aircraft of various types to undertake a range of roles. For such a ship there must be a power generation system that is able to provide large amounts of power for propulsion and ship’s services, rapidly, reliably and economically. An Integrated Full Electric Propulsion (IFEP) system has been selected as the most suitable for this task. At the heart of this system are two Rolls-Royce MT30 Gas Turbine Alternators (GTAs), each capable of producing 35MW of electrical power to propel the ship at the high speeds necessary to launch advanced fighter aircraft. A variety of challenges are currently being faced to integrate these large, modern GTAs into a power and propulsion system that also features diesel generators, power electronic converters and Advanced Induction Motors (AIMs). Solutions to these issues are currently being developed by the Alliance responsible for procuring the ship, working closely with the Ministry of Defence (MoD) and the engine manufacturer to provide a robust and responsive power source that is fully integrated with the power system. This paper begins with an overview of CVF’s integrated full electric power and propulsion system and the performance requirements placed on the prime movers. It will include a discussion of the reasons for and the advantages of the power generation system design. There follows a brief description of the MT30 gas turbine and the characteristics that make it suitable for use in CVF. The main body of the text focuses on the issues relating to, and challenges faced in integrating MT30 into such a large and complex power system and a ship of this nature. Also examined are the solutions being developed to ensure the GTA is at the heart of the IFEP system, and the paper will conclude by looking at the validation of the power generation system.

scholarly journals Effect of Grid Instability on Power Generation System's Reliability

2020 ◽  
pp. 27-37
Author(s):  
Joseph Benedict Bassey ◽  
Isaac F. Odesola
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Failure Rate ◽  
System Reliability ◽  
Power Distribution ◽  
Power Plants ◽  
Time To Failure ◽  
Generation System ◽  
Reliability Indices ◽  
Mean Time

Aims: Reliability assessment of power generation system may be performed with the concept of system adequacy, security or both. Grid being a major component in the power distribution chain is seen to have some influence on the state of the generation system reliability because of the perturbation that may arise from it. In this study, the generation system reliability is evaluated using both the system adequacy and security concept. Study Design: To capture the system security problems attributed to grid disturbance, the generation system is structured into two component systems (1 - generation component and 2 - transmission component) with a series arrangement. Methodology: The reliability indices such as, mean time to failure, mean time to repair, failure rate and repair rate are assessed on component bases and with respect to the entire generation system. Results: The effect of failure rate of the transmission component on the entire generation system failure rate was evaluated as 66.25%, 55.55%, 33.33%, 55.00% and 35.72% in year 2013, 2014, 2017 2018 and 2019 respectively for FIPL Power Plant and 52.94%, 82.35%, 61.38% and 100% effect was evaluated in the year 2016, 2017, 2018 and 2019 respectively for GT5 of Omoku Power Plant. Conclusion: These results showed that there is a significant influence of grid disturbances on the reliability state of the two gas turbine power plants in Nigeria. Measures on possible reliability state improvement of the power generation systems were suggested to include training and retraining of technical personnel on the management of major equipment in the generation and transmission stations. 

Optimal Operational Strategy for PV/Wind-Diesel Hybrid Power Generation System with Energy Storage

2017 ◽  
pp. 1438-1460 ◽  
Author(s):  
Vincent Anayochukwu Ani
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Power System ◽  
Control Algorithm ◽  
Energy System ◽  
Diesel Generator ◽  
Generation System ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Power Generation System

Telecommunications industry requires efficient, reliable and cost-effective hybrid power system as alternative to the power supplied by diesel generator. This paper proposed an operational control algorithm that will be used to control and supervise the operations of PV/Wind-Diesel hybrid power generation system for GSM base station sites. The control algorithm was developed in such a way that it coordinates when power should be generated by renewable energy (PV panels and Wind turbine) and when it should be generated by diesel generator and is intended to maximize the use of renewable system while limiting the use of diesel generator. Diesel generator is allocated only when the demand cannot be met by the renewable energy sources including battery bank. The developed algorithm was used to study the operations of the hybrid PV/Wind-Diesel energy system. The control simulation shows that the developed algorithm reduces the operational hours of the diesel generator thereby reducing the running cost of the hybrid energy system as well as the pollutant emissions. With the data collected from the site, a detailed economic and environmental analysis was carried out using micro power optimization software homer. The study evaluates savings associated with conversion of the diesel powered system to a PV/Wind-Diesel hybrid power system.

scholarly journals Multistate reliability theory—a case study

1986 ◽  
Vol 18 (4) ◽  
pp. 921-932 ◽  
Author(s):  
Bent Natvig ◽  
Skule Sørmo ◽  
Arne T. Holen ◽  
Gutorm Høgåsen
Keyword(s):  
Power Generation ◽  
Case Studies ◽  
Electrical Power Generation ◽  
Electrical Power ◽  
Reliability Theory ◽  
Generation System ◽  
Convincing Case ◽  
Power Generation System ◽  
System States

Fortunately traditional reliability theory, where the system and the components are always described simply as functioning or failed, is on the way to being replaced by a theory for multistate systems of multistate components. However, there is a need for several convincing case studies demonstrating the practicability of the generalizations introduced. In this paper an electrical power generation system for two nearby oilrigs will be discussed. The amounts of power that may possibly be supplied to the two oilrigs are considered as system states.

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