· Abstract: The low power generation in Nigeria had hindered her economic growth and industrialisation. The nation. had ca rried out various reform to ameliorate the electric power crisis but all to
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Mining complexes are often forced to operate in environments characterized by one or several of the following factors: -Remote areas where power supplies are weak or
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Definition. Power quality is a general term to represent the phenomena affecting to the user’s equipment when the AC power exceeds a certain limit. Fig. 1 shows the electricity waveform that serves as an indication of the quality of a power supply. It must be stable in terms of its amplitude, continuity, waveform shape, and frequency.
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· The mine water has low pH (acidic) and high amount of turbidity, iron, sulfate, and total hardness. This water is capable of dissolving metals, such as copper, aluminum, cadmium, arsenic, lead, and mercury in the active mining areas. Similarly, it also leaches these metalliferous constituents from the mineralized rocks.
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Mining complexes are often forced to operate in environments characterized by one or several of the following factors: . Remote areas where power supplies are weak or
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· Department of Electrical Engineering and Industrial Informatics, Politehnica University of Timis,oara, 5 Revolution Street, 331128 Hunedoara, Romania; [email protected]; Tel.: +40-254207541. Abstract: The quality of electrical energy is of particular importance for power engineering.
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Fig. 3. Block diagram of algorithm of the electrical complex of a coal mine model. The formation of a simulation model of the electrical complex includes implementation of the following phases: 1) Collection of the data on the equipment required for modelling of the electric drive of the key mining equipment: Shearer.
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· ABSTRACT. Lack of access to reliable electricity to both rural and urban Zimbabweans is negatively a ecting the quality of people’s life. The country has been. experiencing extended hours of
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Outdoor installation enables a smaller footprint and a reduced HVAC requirement for the E-houses. Transformer power is standardised to minimize the cost of spare units. The 11 kV/ 400 V transformers have a rated power of 1.6 MVA and Zsc 6% to keep In < 2500 A and Isc < 40 kA (including 400 V DOL motor contribution).
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· PF = W/VA (where W = apparent power and VA = volt-ampere product or apparent power). The power factor of a practical AC circuit is usually between 1 and 0. The closer the power factor is to
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· The data collection employed close-ended questionnaires with defined categories to examining the effect of low electrical power supply on the industrial growth in South Africa. The IBM Statistical Package for Social Science statistics version 23 as prescribed by SPSS Inc. (2016) was used in analysing data.
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· Generally, the factors affecting the selection of the feeder conductor size are load growth rate, load forecast, voltage drops, substation transformer rating, conductor rating, total cost, power losses and the reserves of feeder conductor according to the policy of the utility company. 3.5. Length of primary feeder.
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· The relationships between the main factors affecting power supply reliability are shown in Fig. 1. power supply reliability, and power quality (Zhao et al., 2019). The uncertainty performance of the power supply for the urban distribution network is shown in Table
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failure or misoperation of customer equipment”. In IEEE dictionary, power quality is defined as “the concept of powering and grounding. sensitive equipment in a matter that is suitable to the operation of that equipment”. IEC (International Electrotechnical Commission), it is defined as, “ set of parameters.
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· This study aimed to determine factors affecting customer satisfaction with electrical power utility companies during the COVID-19 pandemic. Supported by the integration of SERVQUAL and ECT, this study explored and investigated deeply customer satisfaction focusing on customers of MERALCO during the new environment set by the
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· Engine ering,Na vi. Mumbai. Abstract— The term power quality means maintaining sinusoidal wave of voltage at rated. frequency without distortion. The prime objective is to transmit uninterrupted
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· The scale effects are not universal, as some factors are likely to affect water quality at the riparian scale, while others tend to do that at a watershed scale (Mainali et al., 2019). These relationships are different among different sites, seasons, and parameters studied as well.
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Electric power quality is an aspect of power engineering that has been with us since the inception of power systems; however, topics in power quality have risen to the forefront since the advent of high power semiconductor switches and networking of transmission and subtransmission systems. Also, the trends in modern power engineering have been to
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· Improving the supply quality measured in terms of the number of hours of supply gives the equal end-user level satisfaction as that of a new electricity connection (Aklin et al. 2016). A study has
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· Characteristics that affect power quality are voltage fluctuation, harmonic distortion, voltage unbalance, flicker, supply interruptions, voltage sags, voltage swells and transients etc. Need of Quality Power. In the emerging surplus power scenario, the characteristics of loads and the requirements of electrical systems have changed
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· There are many factors that are affecting power supply in Nigeria, but they are not limi ted to the following: International Journal of Electrical En gineering a nd Ethics – Volume 2 Issue 1
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· We hypothesize that the resilience of power distribution systems depends on two main factors. One is the power distribution infrastructure, the biophysical environment within which it operates, and interactions between the two. The other is the priority given to restoration by the power company, and the effectiveness of the power
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· This paper presents the research into how higher harmonics of current and voltage can affect the electric drives used in the power systems at mining sites. As an object of study, the skip hoisting
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As the electrical energy cost for the coal mining industry is increasing every year, coal mining enterprises must conserve electrical energy for the reduction in output cost. In
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· Power quality means to maintain or compensate the nominal size and. frequency of the near sinusoidal nominal voltage and current of the po wer. system. As an undesirable condition in the power
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· The electric machines are the elements most used at an industry level, and they represent the major power consumption of the productive processes. Particularly speaking, among all electric
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· PF = W/VA (where W = apparent power and VA = volt-ampere product or apparent power). The power factor of a practical AC circuit is usually between 1 and 0. The closer the power factor is to zero, the more it is considered ‘poor’ and therefore indicates an inefficient circuit. On the other hand, a power factor closer to 1 (ideal PF) is
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· Worldwide, 844 million people still lack access to basic drinking water, especially in the rural areas of low and middle income countries. However, considerable progress has been made in recent years due to work on the Millennium Development Goals and Sustainable Development Goals. Nevertheless, countries’ national characteristics
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According to Ethiopian Electric Power Corporation (EEPCo) annual bulletin of 2011/2012, concerning quality of supply, the service quality in the electrified areas is not satisfactory. This is due to poor design, lack of care and negligence during implementation, and lack of scheduled maintenance.
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Trituradora de piedra vendida por proveedores certificados, como trituradoras de mandíbula/cono/impacto/móvil, etc.
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