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.

Research on Reliability Evaluation Methods of Distribution System

2014 ◽  
Vol 672-674 ◽  
pp. 1441-1446 ◽  
Author(s):  
Yu Qiang Ou ◽  
Le Feng Cheng ◽  
Jian Zhong Wen ◽  
Xuan Yu Qiu ◽  
Tao Yu
Keyword(s):  
Distribution System ◽  
Evaluation Method ◽  
Network Reliability ◽  
Distribution Network ◽  
Reliability Evaluation ◽  
Evaluation Indexes ◽  
Specific Distribution ◽  
And Function ◽  
Meaning And Function

Research on reliability of distribution network has very important meaning and function to ensure the quality of power supply. This paper introduces some basic concepts of reliability in distribution network, including distribution network reliability definition, task and index. The classical reliability evaluation method was reviewed, and focused on specific distribution network, an example analysis was given, and specific reliability evaluation indexes were calculated. Finally, the future development of distribution network reliability evaluation was made a simple prospect.

Fault Incidence Matrix Based Reliability Evaluation Method for Complex Distribution System

2018 ◽  
Vol 33 (6) ◽  
pp. 6736-6745 ◽  
Author(s):  
Chengshan Wang ◽  
Tianyu Zhang ◽  
Fengzhang Luo ◽  
Peng Li ◽  
Liangzhong Yao
Keyword(s):  
Distribution System ◽  
Incidence Matrix ◽  
Evaluation Method ◽  
Reliability Evaluation ◽  
Complex Distribution

scholarly journals Flexibility Enhancement in an Islanded Distribution Power System by Online Demand-Side Management

2019 ◽  
Vol 217 ◽  
pp. 01020 ◽  
Author(s):  
Margarita Chulyukova ◽  
Nikolai Voropai
Keyword(s):  
Power System ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Load Shedding ◽  
Load Management ◽  
Daily Maximum ◽  
Power Distribution Systems ◽  
Power Distribution System ◽  
Islanded Operation

The paper considers the possibilities of increasing the flexibility of power distribution systems by real-time load management. The principles of the implementation of special automatic systems for this purpose are proposed. These systems enable some loads of specific consumers of the power distribution system switched to islanded operation to “shift” from the daily maximum to the minimum, which makes some generators available to connect certain essential consumers disconnected earlier by under-frequency load shedding system to the power system. The approach under consideration is illustrated by a power system with distributed generation.

scholarly journals Stochastic Optimization for Network-Constrained Power System Scheduling Problem

2015 ◽  
Vol 2015 ◽  
pp. 1-17 ◽  
Author(s):  
D. F. Teshome ◽  
P. F. Correia ◽  
K. L. Lian
Keyword(s):  
Power System ◽  
Load Shedding ◽  
Mixed Integer ◽  
Piecewise Linear Approximation ◽  
Computational Time ◽  
Forecast Errors ◽  
Scheduling Problem ◽  
Generation System ◽  
Network Constraints ◽  
The Impact

The stochastic nature of demand and wind generation has a considerable effect on solving the scheduling problem of a modern power system. Network constraints such as power flow equations and transmission capacities also need to be considered for a comprehensive approach to model renewable energy integration and analyze generation system flexibility. Firstly, this paper accounts for the stochastic inputs in such a way that the uncertainties are modeled as normally distributed forecast errors. The forecast errors are then superimposed on the outputs of load and wind forecasting tools. Secondly, it efficiently models the network constraints and tests an iterative algorithm and a piecewise linear approximation for representing transmission losses in mixed integer linear programming (MILP). It also integrates load shedding according to priority factors set by the system operator. Moreover, the different interactions among stochastic programming, network constraints, and prioritized load shedding are thoroughly investigated in the paper. The stochastic model is tested on a power system adopted from Jeju Island, South Korea. Results demonstrate the impact of wind speed variability and network constraints on the flexibility of the generation system. Further analysis shows the effect of loss modeling approaches on total cost, accuracy, computational time, and memory requirement.

scholarly journals Going Solar- Conducive Shift to Domestic Solar Electric System

2019 ◽  
Vol 8 (4) ◽  
pp. 11615-11620
Keyword(s):  
Developing Countries ◽  
Power System ◽  
Solar Power ◽  
Positive Perception ◽  
Generation System ◽  
Electric System ◽  
Solar Power Generation ◽  
The World ◽  
Daily Energy ◽  
Power Generation System

Growing needs and heavy consumption of nonrenewable energy sources led to the growth of the solar power system across the world. But, this mechanism couldn’t be absorbed by struggling economies as it was expected. Despite the regular and sustainable supply of electricity people across the developing countries were found reluctant to adopt solar technology to meet their daily energy requirements. This paper would explore the ‘emergence & trends of domestic solar power generation system, challenges for RTS technology across Indian Households, discussion on sustainability & reliability of solar power system in developing countries, review consumers’ behavior towards use of solar power system and Identify the Incentives and Subsidies attached with domestic RTS in developing countries’. The study observed a positive perception of people towards domestic RTS and willing to adopt it if potential limitations would be removed. Negative behavior is derived from technical as well as economic limitations of this technology. The overall growth is quite impressive and shows a bright and progressive future ahead.

scholarly journals Research on Economic Evaluation Methods of Offshore Oil Multi-Platform Interconnected Power System Considering Petroleum Production Characteristics

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5521
Author(s):  
Yuming Liu ◽  
Qingguang Yu ◽  
Gaoxiang Long ◽  
Zhicheng Jiang
Keyword(s):  
Economic Evaluation ◽  
Power System ◽  
Evaluation Method ◽  
Oil Field ◽  
Small Scale ◽  
Bohai Bay ◽  
Interconnected Power System ◽  
Actual Production ◽  
Offshore Oil ◽  
Production Characteristics

Offshore oil multi-platform interconnected power system is developing rapidly. The proposal of an effective economic evaluation method that fits the actual production situation of offshore oilfields is very meaningful for the planning and construction of multi-platform interconnected power systems. This article proposes the electric depreciation, depletion, and amortization (DD&A) barrel oil cost S and maximum expected benefit per unit power generation Ie as economic indicators, considering the actual production characteristics and life cycle of the oil field. In order to build a complete economic evaluation system, this article also introduces the N−1 pass rate ηN−1, voltage qualification rate γ, power supply reliability ASAI (Average Service Availability Index), and other reliability indicators to evaluate the offshore power system. When calculating the weight of the indicators, analytic hierarchy method (AHP) was applied to calculate subjective weights, and an entropy method was applied to calculate objective weights. To unify the two weights, the ideal point method is proposed to obtain compound weights. Finally, this article selects an offshore oil field in Bohai Bay, China as example, and analyses short-term small-scale, long-term large-scale, and actual power system as calculation examples in different planning periods. The analysis result verifies the effectiveness of the economic evaluation method.

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