adequacy assessment
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2021 ◽  
Vol 8 (6) ◽  
pp. 861-870
Author(s):  
S. Vinoth John Prakash ◽  
P.K. Dhal

The output of wind and the solar system is not constant; it is difficult to access the adequacy of the system. The Generation model is developed for 240 MW of different generation units in the Roy Billinton Test System (RBTS). Then a multi-state wind and solar generation model is developed based on different solar radiation and wind speed to evaluate the probability of the states. In this work, the wind and solar systems are studies for separate locations with each consist of 8 MW, 18 MW, 28 MW, and 38 MW generation capacities. This wind and solar generation model are applied to Roy Billinton Test System (RBTS) to evaluate the reliability indices like Loss of Load Expectation (LOLE). Based on the development of the MATLAB program for determining reliability indices, the capacity outage probability is developed for multiple solar and wind states. Based on standard load forecasting and the Time Series Load forecasting technique, the reliability of the system is analyzed. The results reveal the variation of risk indices in the system when additional generators are incorporated into the RBTS generation system. The cost optimization for Solar and Wind system were conducted using HOMER software to obtain the levelized cost of the proposed system.


2021 ◽  
Vol 201 ◽  
pp. 107507
Author(s):  
Bashir Bakhshideh Zad ◽  
Jean-François Toubeau ◽  
Behzad Vatandoust ◽  
Kenneth Bruninx ◽  
Zacharie De Grève ◽  
...  

2021 ◽  
Author(s):  
Gord Stephen ◽  
Simon H. Tindemans ◽  
John Fazio ◽  
Chris Dent ◽  
Armando Figueroa Acevedo ◽  
...  

The loss-of-load expectation (LOLE) risk metric has been used in probabilistic power system resource adequacy assessment for over 70 years, and today is one of the most recognizable and widely-used measures of system shortfall risk. However, this wide adoption has been accompanied by ambiguities and inconsistencies in its definition and application. This paper provides a unifying reference for defining the metric as it relates to modern analyses, while clarifying a number of common points of confusion in its application. In particular, the paper clarifies that LOLE is not a measure of expected total shortfall duration, a 2.4 hours per year LOLE target implies a less reliable system than a 1 day in 10 years (0.1 days per year) LOLE target, and exact conversions between hourly and daily LOLE targets are not generally possible. Illustrative examples are provided to help explain each of these points.


2021 ◽  
Author(s):  
Gord Stephen ◽  
Simon H. Tindemans ◽  
John Fazio ◽  
Chris Dent ◽  
Armando Figueroa Acevedo ◽  
...  

The loss-of-load expectation (LOLE) risk metric has been used in probabilistic power system resource adequacy assessment for over 70 years, and today is one of the most recognizable and widely-used measures of system shortfall risk. However, this wide adoption has been accompanied by ambiguities and inconsistencies in its definition and application. This paper provides a unifying reference for defining the metric as it relates to modern analyses, while clarifying a number of common points of confusion in its application. In particular, the paper clarifies that LOLE is not a measure of expected total shortfall duration, a 2.4 hours per year LOLE target implies a less reliable system than a 1 day in 10 years (0.1 days per year) LOLE target, and exact conversions between hourly and daily LOLE targets are not generally possible. Illustrative examples are provided to help explain each of these points.


2021 ◽  
pp. 29-32
Author(s):  
Olena PETRUSHKA

Introduction. Due to the demographic, socio-economic and financial problems facing Ukraine, the need to modernize Ukraine’s pension system is quite acute. The basis for its improvement should be changes that will ensure the creation of a balanced and equitable pension insurance system, which will operate on the basis of transparency and efficiency, the main vocation of which will be to ensure a high standard of living and social integration of existing and future retirees. The purpose of the paper is to study the problems of the functioning of the pension system of Ukraine and to find ways to improve the system of formation and use of financial resources of pension insurance. Results. Real and priority steps towards the implementation of the outlined vectors of reform on the way to improving the pension system should be comprehensive systemic measures to de-shadow the economy, create jobs, legalize the labor market, reduce pressure on the payroll and simplify tax administration, ensure adequate wages and income. In order to improve the mechanism of effective use of the pension system, it is necessary to modernize the existing system of administrative, financial and budgetary management. The key point of such modernization is to take into account the completeness of financial security, efficiency and effectiveness of financial flow management. Ensuring the efficient use of budget funds of the pension system is considered as one of the ways to increase the provision of these funds. The use of budget funds should be based on a balance of opportunities and needs for financial resources, analysis of their adequacy, assessment of their effectiveness and manageability, the availability of innovative levers and management schemes, other components of financial management, soundness of financial flows. One of the important activities to solve the problem of formation and use of financial resources is to overcome the problem of distrust and lack of public awareness about private pension provision. Conclusion. The urgency of the chosen ways to modernize the pension system of Ukraine is increasing due to the fact that it will concern the improvement not only of the pension insurance system, but also of the entire economic system of Ukraine. After all, it will create additional incentives for the economy to emerge from the shadows, will form a great potential of financial resources that will be directed to investment and economic development of the country.


Author(s):  
Rafael Peris ◽  
Manuel Serrano ◽  
Lucas Pons ◽  
Alvaro Nofuentes ◽  
Dusan Presic ◽  
...  

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