Asymmetrical Fault Correction for the Sensitive Loads Using a Current Regulated Voltage Source Inverter

Bukhari, Syed Sabir Hussain; Atiq, Shahid; Lipo, T.Α.; Kwon, Byung-il

doi:10.3390/en9030196

Cited by 9 publications

(5 citation statements)

References 22 publications

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“…Moreover, solar radiation adds further complexity, as it may be intermittent, seasonal, and uncertain. The hybrid optimization model for electric renewables (HOMER) was designed to overcome these challenges [8]. Thus, the optimization of a system can also be achieved through Empirical analysis and iterative approach, system reliability model, system cost model, and mathematical model of the entire system, however, they were used to achieve the result for this project.…”

Section: B Analysis Of the Designed Power Systemmentioning

confidence: 99%

“…The alternating current (AC) loads are fed directly from the backup system, and the direct current (DC) load feed occurs via a converter (AC&DC).In a situation of asymmetrical faults and imbalances, a solution to this kind of problem is rendered, by integrating a standard current regulated voltage source inverter in parallel to the load and utility mains so any asymmetrical fault or imbalance can be avoided for sensitive loads. The proposed technique avoids interruption of the power supply during the faults and provides instant protection to critical loads with high power regulating and conditioning capabilities, moreover, use of unsymmetrical faults analysis method with hybrid compensation can be considered in [8]. It should be noted that the cooling architecture is designed to address heat generation from radio equipment, power conversion equipment, and other heat equipment.…”

Section: B Analysis Of the Designed Power Systemmentioning

confidence: 99%

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Evaluation and Analysis of the Deployment of Green Communication Technology in GSM

Bakare

Orike

Oko

2020

EJECE

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This paper presents an evaluation and analysis of the deployment of green communication technology in Nigeria. Most base stations in Nigeria uses diesel generators to power their Cell Sites, this has been identified as a problem if not checked because it will continue to add to the Carbon dioxide emission in the atmosphere and hence the depletion of the ozone layer. Green Communication Technology was proposed to solve this problem. Energy deployed are photovoltaic and wind turbine (PV/WT) energy while diesel generator (DG) will still be used as a backup. With the use of hybrid technology (PV/WT/DG), carbon emission will be reduced by 70% or more, efficiency will be achieved.. The results obtained from this research work are based on economics cost, efficiency, power outputs per year and carbon emissions. , in terms of efficiency the DG only system has a mean efficiency output of 8.18% and mean efficiency of 25% while the proposed system has a mean efficiency output of 14.8% and a mean efficiency of 27.5% for PV and 21.3% of WT, electrical production of DG only is 119439kWh/yr while Hybrid Systems (HBS) has electricity production of 124,488kWh/yr, base on life cycle DG only system operate for 3yr and max of 8yrs while HBS operate for 25yrs above, the carbon emissions for DG only system for CO2, CO, NO2 are 75,033, 473, 444kg/yr respectively and HBS for CO2, CO, NO2 is 264, 1.79 and 2.04kg/yr respectively. From the result obtained it can be concluded that the proposed system is better than the existing system, therefore, it can be recommended for GSM operators in Nigeria and any developing nation.

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Section: B Analysis Of the Designed Power Systemmentioning

confidence: 99%

Section: B Analysis Of the Designed Power Systemmentioning

confidence: 99%

Evaluation and Analysis of the Deployment of Green Communication Technology in GSM

Bakare

Orike

Oko

2020

EJECE

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“…Moreover, the UPS system is categorized into three types on the basis of its operation and configuration. These three types comprise of online, offline, and line-interactive [13]- [18]. However, among these types, the line-interactive UPS system has always been the preferred choice for industrial consumers owing to its high efficiency and high power-compensating capabilities as compared to offline and online UPS topologies [1].…”

Section: Introductionmentioning

confidence: 99%

A Single-Phase Line-Interactive UPS System for Transformer-Coupled Loading Conditions

Bukhari

2020

IEEE Access

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A line-interactive uninterruptible power supply (UPS) system is one of the important installations implemented by industrial users to provide continuous power to sensitive industrial applications. Such loads often come with isolation transformers for voltage matching and protection purposes. Hence, a line-interactive UPS system experiences a serious problem of transient current when it operates under transformer-coupled loading conditions. The occurrence of this transient current can either impair the apparatus itself or turn on the overcurrent safety devices. In any situation, the interruption of electrical power for sensitive industrial loads is unavoidable. So as to keep the uninterrupted power and to eliminate transient current for industrial applications operating under transformer-coupled loading conditions, we propose a single-phase line-interactive UPS system based on a customary current-regulated inverter. The inverter of the proposed UPS system employs an improved current-regulating scheme implemented in a stationary frame of reference which regulates the load current and never let it to increase than a prescribed value as the transformer-coupled loads are turned on. Laboratory test results obtained under various operating and loading conditions of the single-phase line-interactive UPS system verify the operation of the proposed system. INDEX TERMS Line-interactive, flexible loading conditions, transient current, transformer-coupled loads.

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“…The approach has been extended towards the asymmetric properties in [11]. Asymmetrical fault correction has been addressed in [12]. An asymmetric approach to the estimation of the benefit resulting from the improved control has been analyzed in [13].…”

Section: Introductionmentioning

confidence: 99%

Control Quality Assessment for Processes With Asymmetric Properties and its Application to pH Reactor

Domański

Ławryńczuk

2020

IEEE Access

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The majority of processes in chemical industry is nonlinear. However we often take advantage of linear approximation and analysis as the useful simplification. Nonetheless, one has to remember that the reality is often complex, nonlinear and full of unknown unknowns. One of the forgotten aspects in control engineering is connected with the symmetricity. Asymmetric properties appear, when the process or instrumentation introduces nonlinearities. Control systems are then exposed to the asymmetrical behavior and should properly react, while their performance measures have to take them into account. This paper proposes robust control performance indexes in form of the M-estimator using logistic ψ function denoted σ H and α-stable distribution scale factor γ. Additionally, their application procedure in industrial chemical engineering environment is proposed. The approach is illustrated with an example of the pH neutralization process. INDEX TERMS Asymmetry, control performance assessment, fat-tails, MPC, pH neutralization.

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Asymmetrical Fault Correction for the Sensitive Loads Using a Current Regulated Voltage Source Inverter

Cited by 9 publications

References 22 publications

Evaluation and Analysis of the Deployment of Green Communication Technology in GSM

Evaluation and Analysis of the Deployment of Green Communication Technology in GSM

A Single-Phase Line-Interactive UPS System for Transformer-Coupled Loading Conditions

Control Quality Assessment for Processes With Asymmetric Properties and its Application to pH Reactor

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