Personal Electric Shock Situation Analysis Method for Distribution Network

This article discusses the interference analysis of medium voltage air line 20 kv feeder using failure mode and effects analysis method. The distribution network consists of two parts, the first the distribution network consists of two parts, the first is the medium / primary voltage (JTM) network, which supplies electrical power from the sub-transmission substation to the distribution substation, the primary distribution network uses three wires or four wires for three phases. the impact of the reliability index from the calculation of the impact of the reliability index based on the number of disturbances (SAIFI), it shows that in January 2019 it has the highest index value, namely SAIFI, 1,695 disturbances/ subscribers. From the results of the calculation of the impact of the reliability index based on the number of blackouts (SAIDI), it shows that in January 2019 the SAIDI index value was 3,883 hours/customer.

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Ensuring railway safety on a national scale: national and international experience

Vestnik Universiteta ◽

10.26425/1816-4277-2021-9-60-65 ◽

2021 ◽

pp. 60-65

Author(s):

A. A. Bychkova

Keyword(s):

International Experience ◽

Transport Sector ◽

Analysis Method ◽

Railway Transport ◽

Situation Analysis ◽

National Scale ◽

Foreign Countries ◽

Railway Safety ◽

Scenario Modelling ◽

Accident Data

The article considers the main measures to create safety conditions in railway transport in foreign countries and compares them with the methods of safety provision by the domestic carrier JSC “Russian Railways”. It is noted that today Russia has its own practices for maintaining a level of security, but that alternative foreign approaches would improve the level of protection. The author analyses accident data and proposes additional measures to reduce the number of accidents. Scenario modelling and the integrated situation analysis method have been proposed as a method for selecting measures to ensure safety and improve the situation in the railway transport sector.

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Location and Capacity Selection Method for Electric Thermal Storage Heating Equipment Connected to Distribution Network Considering Load Characteristics and Power Quality Management

Applied Sciences ◽

10.3390/app10082666 ◽

2020 ◽

Vol 10 (8) ◽

pp. 2666

Author(s):

Xin-Rui Liu ◽

Fu-Jia Zhang ◽

Qiu-Ye Sun ◽

Peng Jin

Keyword(s):

Power Quality ◽

Programming Model ◽

Distribution Network ◽

Harmonic Distortion ◽

Thermal Storage ◽

Energy Utilization ◽

Configuration Model ◽

Analysis Method ◽

Heating Equipment ◽

Multi Objective

High-permeability distributed wind power and photovoltaic systems are connected to the distribution network, which exacerbates the volatility and uncertainty of the distribution network. Furthermore, with the increasing demand of heating in winter and environmental protection, the wide use of electric thermal storage heating equipment (ETSHE) can promote distributed renewable energy utilization. However, an unplanned ETSHE connection to the distribution network may cause serious power quality problems. A new method of equipment location and capacity is proposed, which considered the improvement of power quality and load demand characteristics of the distribution network. First, based on heat load portrait technology, the node’s thermal load classification prediction was carried out to provide the data basis for the model solution. Second, the multi-objective optimal location and capacity programming model including harmonic distortion rate, voltage deviation, voltage fluctuation, and ETSHE cost was established. Then, the system nodes were preprocessed based on the sensitivity analysis method to reduce the number of installation nodes to be selected, and a feasible alternative set of installation nodes for the optimal configuration model of ETSHE could be obtained. Finally, the improved multi-objective particle swarm optimization algorithm was used to solve the model, and the data envelope analysis method was used to evaluate the power quality of each access scheme. The analysis of the numerical example shows that it can not only satisfy the user′s heat demand, but also effectively improve the power quality by rationally planning the location and capacity of ETSHE, which achieves the safe and efficient utilization of energy.

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Comparative Analysis of Coal Mining Disasters in Turkey

EJONS International Journal of Mathematic, Engineering and Natural Sciences ◽

10.38063/ejons.476 ◽

2021 ◽

Vol 5 (19) ◽

Author(s):

ilker İNAN

Keyword(s):

Coal Mining ◽

Coal Mine ◽

Developed Countries ◽

Working Environment ◽

Analysis Method ◽

Situation Analysis ◽

Important Place ◽

The World ◽

Future Situation ◽

Mine Accidents

Use of coal mine is based on centuries, but the expansion of its usage area has been after the Industrial Revolution in parallel with other mines. With the effect of this revolution; The use of minerals such as coal, iron, copper and tin has increased. Among these mines, coal mine; It has a very important place because it can be used for industrialization, powering machines, generating electricity and heating. In order to provide the increasing need in these areas every year, coal enterprises were established in countries with rich coal deposits and served the energy sector. The share of coal in the energy resources consumed in the world has increased in a short time and has become a determining factor on the world economy. This situation has led to an increase in the number of coal mine enterprises, with developed countries turning to the mining sector for industrialization and economic progress. Accidents in coal mines have increased as the number of mines has grown. Despite the fact that numerous studies have been conducted to prevent these accidents, accidents still occur. Coal mining is regarded as a hazardous work environment due to the high frequency of accidents and their consequences. To minimize these risks and ensure a healthy working environment, the required infrastructure should be established, audit-oriented studies should be conducted, and flaws should be remedied based on the findings. Within the scope of the study, the way and types of coal mine accidents, which are common in Turkey, were investigated, as well as a literature analysis of the reasons of these accidents. The number of accidents and casualties between 2015-2020 were examined and a future situation analysis was made. Regression Analysis Method, one of the statistical analysis methods, was used in the situation analysis phase. The number of coal mine accidents and fatalities in countries around the world since 1902, has been studied. By using the same Analysis Method, the future situation analysis for the next 10 years was made in the light of the data between 1902-2020, and data on the number of accidents and casualties that may occur in the coal mining area were obtained.

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