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![Table 1 Categories of methods for risk analysis -grouping based on [1]](profile/Dag-Nordgard/publication/266869848/figure/tbl5/AS:647916947505183@1531486846209/Categories-of-methods-for-risk-analysis-grouping-based-on-1_Q320.jpg)
SUMMARY
During the last 10 to 15 years electricity distribution companies throughout the world have been ever more focused on asset management as the guiding principle for their activities. Within asset management, risk is a key issue for distribution companies, together with handling of cost and performance. There is now an increased awareness of...
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Citations
... For the UAE, electricity requirements are determined by the structure of the government, as well as powers that each individual emirate has (Agrawal, 2016). These requirements have included the application of benchmarking that has been enabled through the monopoly regulation of electric distribution (Nordgård et al., 2009;Nordgård, 2010). This has significantly contributed to the improvement of efficiency throughout the industry. ...
Electricity distribution systems (EDSs) are essential pieces of infrastructure for nations worldwide. However, the key assets constituting these systems can be exposed to various forms of risk. The purpose of this research was to explore and explicate the risk management methods applied to electricity distribution system asset management in the United Arab Emirates (UAE) electricity markets. It was a secondary research that encompassed the use of the existing data to explore this issue and address the research questions. The research findings revealed the electricity distribution system asset management exists in the form of real time, mid-term, and long-term. Moreover, it was found that this system could be exposed to economic, environmental, quality, reputational, vulnerability and regulatory risks. Finally, the research findings revealed risk management methods that could be used to the system in the UAE electricity markets are categorized as simplified, standard, and model-based. This study recommended that UAE companies operating in the electricity industry should apply a holistic risk analysis in their electricity distribution system asset management.
... Theoretical frameworks have been developed, which address how to include risk in the network maintenance and renewal [2] providing a basis for systematic differentiation between network components due to different probabilities for and consequences of undesired events, covering a variety of risk categoriese.g. economy, safety and environmental impact [3,4]. ...
... The answers to these three questions will give a picture of the risks. The questions are quite simple, but the answers are not straightforward [2]. ...
... Hence risk assessments are quite necessary and the proposed actions need to be put in place to minimize risks to tolerable levels on a continuous basis. Nordgård [3] states that there is an increased awareness to incorporate risk analyses into the companies' decision making and such risks include economic, safety and environmental impacts. Additionally solutions must be sought for risks and that all risk aspects are must be sufficiently taken care of. ...
... Hence risk assessments are quite necessary and the proposed actions need to be put in place to minimize risks to tolerable levels on a continuous basis. Nordgård [3] states that there is an increased awareness to incorporate risk analyses into the companies' decision making and such risks include economic, safety and environmental impacts. Additionally solutions must be sought for risks and that all risk aspects are must be sufficiently taken care of. ...
... Hence risk assessments are quite necessary and the proposed actions need to be put in place to minimize risks to tolerable levels on a continuous basis. Nordgård [3] states that there is an increased awareness to incorporate risk analyses into the companies' decision making and such risks include economic, safety and environmental impacts. Additionally solutions must be sought for risks and that all risk aspects are must be sufficiently taken care of. ...
The provision of safe, reliable and affordable power supply is one of the most important cornerstones for economic development. The risks range from minor to major risks such serious body injuries to fatalities; some of which have a cascading effect to dependents of the affected. Hence, electricity operations as well as its utilization are considered to be high risk. The focus of this paper is to identify the hazards and risks associated with the various processes involved in each step and suggest possible measures to control the identified risks. The Swaziland Electricity Company (SEC) was used as a case study wherein the company’s generation, transmission and distribution capabilities were audited. The top three significant hazards identified included; exposure to live wires, road hazards and the use of uncertified/serviced/ defective/wrong equipment and/or machinery. The distribution department was observed to have the most hazards and fatalities when compared to the other departments. This work determined hazards associated with the electricity sector and developed a simplified tool for hazard identification which can be used by other sectors. The data obtained in the hazard registers will act as baseline information for other electricity utilities wishing to implement health and safety systems. The study provides information on currently used control measures and proposes additional measures that could help improve the safety performance of Swaziland Electricity Company and facilities of similar kind.
... Hence risk assessments are quite necessary and the proposed actions need to be put in place to minimize risks to tolerable levels on a continuous basis. Nordgård [3] states that there is an increased awareness to incorporate risk analyses into the companies' decision making and such risks include economic, safety and environmental impacts. Additionally solutions must be sought for risks and that all risk aspects are must be sufficiently taken care of. ...
The provision of safe, reliable and affordable power supply is one of the most important cornerstones for economic development. The risks range from minor to major risks such serious body injuries to fatalities; some of which have a cascading effect to dependents of the affected. Hence, electricity operations as well as its utilization are considered to be high risk. The focus of this paper is to identify the hazards and risks associated with the various processes involved in each step and suggest possible measures to control the identified risks. The Swaziland Electricity Company (SEC) was used as a case study wherein the company's generation, transmission and distribution capabilities were audited. The top three significant hazards identified included; exposure to live wires, road hazards and the use of uncertified/serviced/ defective/wrong equipment and/or machinery. The distribution department was observed to have the most hazards and fatalities when compared to the other departments. This work determined hazards associated with the electricity sector and developed a simplified tool for hazard identification which can be used by other sectors. The data obtained in the hazard registers will act as baseline information for other electricity utilities wishing to implement health and safety systems. The study provides information on currently used control measures and proposes additional measures that could help improve the safety performance of Swaziland Electricity Company and facilities of similar kind.
... Good and comprehensive input data are expensive, and sophisticated analysis based on detailed data demands even more resources. A common solution is to use mean values, which is the case in, for example, the calculation of wellestablished indices such as SAIDI [12], [13], [14]. However, there are significant disadvantages connected to the use of mean values in the analysis [15]. ...
The international tendency towards quality regulation of power distribution tariffs, along with a generally increased pressure of cost efficiency with maintained high reliability, give incentives to introduce more advanced analysis methods within asset management and project planning. This paper proposes a method to compare existing analysis methods with other methods or improvements of current method without perform any sharp changes in the organization. The approach is to compare recently performed risk reducing investments, based on current analysis methods used by the company, and then perform a hypothetical investment planning process based on more comprehensive reliability analysis.
This paper presents results from a pre-study of a collaborative project between the industry and the academy to highlight and investigate the art of choosing right detail level of input data used within reliability analysis of power distribution. The aim of the paper is also to: on one hand provide academic reference material from the “reality”, and on the other hand to inspire the industry to review their current analysis methods and if needed, implement improvements.
... Asset management can be summarized as the art of finding a balance between risk, cost and performance. [51] ...
The introduction of performance based tariff regulations along with higher media and political pressure have increased the need for well-performed risk and asset management applied to electric power distribution systems (DS), which is an infrastructure considered as a natural monopoly. Compared to other technical systems, DS have special characteristics which are important to consider. The Swedish regulation of DS tariffs between 1996 and 2012 is described together with complementary laws such as customer compensation for long outages. The regulator’s rule is to provide incentives for cost efficient operation with acceptable reliability and reasonable tariff levels. Another difficult task for the regulator is to settle the complexity, i.e. the balance between considering many details and the manageability. Two performed studies of the former regulatory model, included in this thesis, were part of the criticism that led to its fall. Furthermore, based on results from a project included here, initiated by the regulator to review a model to judge effectible costs, the regulator changed some initial plans concerning the upcoming regulation.
A classification of the risk management divided into separate categories is proposed partly based on a study investigating investment planning and risk management at a distribution system operator (DSO). A vulnerability analysis method using quantitative reliability analyses is introduced aimed to indicate how available resources could be better utilized and to evaluate whether additional security should be deployed for certain forecasted events. To evaluate the method, an application study has been performed based on hourly weather measurements and detailed failure reports over eight years for two DS. Months, weekdays and hours have been compared and the vulnerability of several weather phenomena has been evaluated. Of the weather phenomena studied, heavy snowfall and strong winds significantly affect the reliability, while frost, rain and snow depth have low or no impact. The main conclusion is that there is a need to implement new, more advanced, analysis methods. The thesis also provides a statistical validation method and introduces a new cate
... Other countries, e.g., UK, have also adopted new laws on customer compensation that work in parallel with the regulation of customer network tariffs (OPSI 2005). To meet current and future requirements, new methods and tools to perform good risk analyses are needed (Nordgård 2010). Risk management is commonly used for example for studies of nuclear power plants, air pollution, dams etc. ...
The introduction of performance based tariff regulations, and higher media and political pressure have increased the need for well-performed asset management in the operation and planning of electrical distribution systems. In this paper quantitative reliability assessment methods are proposed as a tool to meet these new incentives. Electrical distribution systems have compared to other technical systems several special characteristics which are important to take into consideration when introducing reliability analysis methods. Moreover, the paper gives a brief discussion on the effects and the importance of customer participation in improving system reliability by providing additional system operating reserve from the market perspective. Finally, the paper discusses the reliability analysis with the reliability test systems, and stresses the usefulness of generally known test systems for such assessments. The ideas of future work on development of these test systems to address the changing power systems are presented.
Electricity distribution companies are to an increasing extent using risk assessment methods in their asset management practices. This paper presents an overall framework for risk-informed decision support where simplified risk analysis methods are used for initial risk assessment, and quantitative risk analysis methods are used to perform more in-depth studies for selected problems. Quantitative risk assessment methods are far more laborious compared to simplified analyses, so it is important that such analyses are performed only to a limited number of risk problems.
