This article aims to incorporate the reliability model of power electronic converters into power system reliability analysis. The converter reliability has widely been explored in device- and converter-levels according to physics of failure analysis. However, optimal decision-making for design, planning, operation, and maintenance of power electronic converters require system-level reliability modeling of power electronic-based power systems. Therefore, this article proposes a procedure to evaluate the reliability of power electronic-based power systems from the device-level up to the system-level. Furthermore, the impact of converter failure rates including random chance and wear-out failures on power system performance in different applications such as wind turbine and electronic transmission lines is illustrated. Moreover, because of a high calculation burden raised by the physics of failure analysis for large-scale power electronic systems, this article explores the required accuracy for reliability modeling of converters in different applications. Numerical case studies are provided employing modified versions of the Roy Billinton Test System (RBTS). The analysis shows that the converter failures may affect the overall system performance depending on its application. Therefore, an accurate converter reliability model is, in some cases, required for reliability assessment and management in modern power systems.

/pdf/incorporating-power-electronic-converters-reliability-into-575xrzai3l.pdf

Reliability Evaluation of Power Systems

Incorporating Power Electronic Converters Reliability Into Modern Power System Reliability Analysis

Nowadays, around 12 billion people remain without access to electricity in rural areas of Africa, Asia and Latin America In order to achieve universal access, a wide range of institutions must be involved in long-term rural electrification programs within a regional and national scope In this context, the main objective of this research is to propose an evaluation methodology which aims to promote continual improvement of the programs underway, by undertaking the appropriate modifications in terms of their design and implementation In this regard, a formative approach is sought, as the programs underway require from elements for continual improvement In addition, a management perspective is also sought, as the results focus on program leaders for the implementation of suitable modifications, as and when needed The proposed evaluation methodology considers 4 sustainability dimensions: environmental, technical, socioeconomic and institutional, in turn composed of 15 criteria that allow the design and implementation of the program to be analyzed in detail The criteria are assessed by means of indicators dealing with the specific conditions of each program As a case study, the Venezuelan program "Sowing Light" is taken as an empirical application of the proposed methodology Launched in 2005, this program has been developed in three phases, reaching 900 rural communities to date, and is expected to benefit 2020 more in the near future Hence, the proposed evaluation methodology aims to provide useful results to compare RET-based electrification programs with conventional grid extension Similarly, the methodology promotes continual improvement in favor of universal electricity access in rural communities in this country, as well as lessons learned that can be useful for the development of similar initiatives in other developing countries

/pdf/formative-evaluation-of-sustainability-in-rural-2fzw5fp4qd.pdf

Formative evaluation of sustainability in rural electrification programs from a management perspective: A case study from Venezuela

Power transformer is one of the most expensive equipment and plays a vital role in power transmission and distribution (T&D) systems. This paper presents a comprehensive risk assessment method of transformers, which integrates the operating condition of transformer and the consequences of transformer failure. Health index provides a practical tool for evaluating the state of transformers. Meanwhile, the probability of transformer outage is calculated by the historical operation and maintenance statistic data, which in some extent represents the possibility of transformer failure under certain health index level. Subsequently, based on the power flow analysis, the increment of network loss and emergence of load reduction induced by transformer outage are proposed. This method not only has a vital significance for the operation and maintenance of transformers, but also has a reference for improving the economic efficiency and the reliability of power network operating.

Reliability Evaluation of Power Systems

Citations

Incorporating Power Electronic Converters Reliability Into Modern Power System Reliability Analysis

Formative evaluation of sustainability in rural electrification programs from a management perspective: A case study from Venezuela

A risk assessment method of transformer considering the economy and reliability of power network

Related Papers (5)

Reliability Evaluation of Power Systems

Reliability of Power Systems

A Comparison of Reliability Evaluation Techniques for Power Systems

Power equipment reliability evaluation based on data mining

Reliability Analysis for System of Systems