Optimized Economic Loading of Distribution Transformers Using Minimum Energy Loss Computing

Agha, Ayman; Attar, Hani; Luhach, Ashish Kr.

doi:10.1155/2021/8081212

Cited by 7 publications

(7 citation statements)

References 38 publications

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“…Considering what is presented in Figure 1, a simple system of an industrial distribution network, which has a transformer and a PFCU, the MV busbars are connected to the grid via an HV transformer. If active resistance is neglected, the equivalent impedance Z z can be calculated according to Equation (12).…”

Section: Methodsmentioning

confidence: 99%

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Improved Methodology for Power Transformer Loss Evaluation: Algorithm Refinement and Resonance Risk Analysis

Plienis,

Deveikis,

Jonaitis

et al. 2023

Energies

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The decline in power quality within electrical networks is adversely impacting the energy efficiency and safety of transmission elements. The growing prevalence of power electronics has elevated harmonic levels in the grid to an extent where their significance cannot be overlooked. Additionally, the increasing integration of renewable energy sources introduces heightened fluctuations, rendering the prediction and simulation of working modes more challenging. This paper presents an improved algorithm for calculating power transformer losses attributed to harmonics, with a comprehensive validation against simulation results obtained from the Power Factory application and real-world measurements. The advantages of the algorithm are that all evaluations are performed in real-time based on single-point measurements, and the algorithm was easy to implement in a Programmable Logic Controller (PLC). This allows us to receive the exchange of information to energy monitoring systems (EMSs) or with Power factor Correction Units (PFCUs) and control it. To facilitate a more intuitive understanding and visualization of potential hazardous scenarios related to resonance, an extra Dijkstra algorithm was implemented. This augmentation enables the identification of conditions, wherein certain branches exhibit lower resistance than the grid connection point, indicating a heightened risk of resonance and the presence of highly distorted currents. Recognizing that monitoring alone does not inherently contribute to increased energy efficiency, the algorithm was further expanded to assess transformer losses across a spectrum of Power Factory Correction Units power levels. Additionally, a command from a PLC to a PFCU can now be initiated to change the capacitance level and near-resonance working mode. These advancements collectively contribute to a more robust and versatile methodology for evaluating power transformer losses, offering enhanced accuracy and the ability to visualize potentially critical resonance scenarios.

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Section: Methodsmentioning

confidence: 99%

“…Recently, the widespread use of power electronic systems increased in magnitude [10], therefore it has become a key issue in installations [11]. Harmonic distortion not only poses threats to the operational lifespan of equipment such as power transformers but also leads to energy losses that impact economic viability [12].…”

Section: Introductionmentioning

confidence: 99%

Improved Methodology for Power Transformer Loss Evaluation: Algorithm Refinement and Resonance Risk Analysis

Plienis,

Deveikis,

Jonaitis

et al. 2023

Energies

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“…In other words, all countries at the same time are colonies and colonialists. In such situations, the imperialistic competition is over, and the algorithm is stopped [18][19][20][21][22][23][24][25][26].…”

Section: Figure 3: Assimilation Policymentioning

confidence: 99%

Optimal Allocation of STATCOM to Enhance Transient Stability Using Imperialist Competitive Algorithm

Amer¹,

Makahleh²,

Ababneh³

et al. 2023

Intelligent Automation &Amp; Soft Computing

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With the daily expansion of global energy consumption, developing the power grids is of uttermost importance. However, building a new transmission line is costly and time-consuming, so utilizing the same lines with possible higher transmission capacity is very cost-effective. In this regard, to increase the capacity of the transmission lines, the flexible alternating current transmission system (FACTS) has been widely used in power grids in recent years by industrialized countries. One of the essential topics in electrical power systems is the reactive power compensation, and the FACTS plays a significant role in controlling the reactive power current in the power grid and the system voltage oscillations and stability. When a static synchronous compensator (STATCOM) is embedded in a power system to increase the bus voltage, a supplementary damping controller can be designed to enhance the system oscillation damping. Given the expansion of the grids in the power system, the complexity of their optimization and the extraordinary ability of the imperialist competitive algorithm (ICA) for solving such problems, in this paper, the ICA has been used to determine the optimal position and size of the FACTS devices.

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“…the effect of capacitors that may optimize the maximum electrical power saving is shown in [26], where [27] calculates the transformer minimum energy loss.…”

Section: The Hot-spot Temp Modelmentioning

confidence: 99%

Investigating and calculating the temperature of hot-spot factor for transformers

Yahya

Attar

Issa

et al. 2023

IJEECS

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This article explores the measurement of temperature in transient states, utilizing the principles of heat transfer and thermal-electrical metaphor. The study focuses on the nonlinear thermal resistances present in various locations within a distribution transformer, while taking into account variations in oil physical variables and temperature loss. Real-time data obtained from heat run tests on a 250-MVA-ONAF cooled unit, conducted by the transformer manufacturer, is used to verify the thermal designs. The observations are then compared to the loading framework of the IEC 60076-7:2005 system. The findings of this research provide a better understanding of temperature measurement in transient states, particularly in distribution transformers, and can be applied to the design and development of more efficient and reliable transformer systems.

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Optimized Economic Loading of Distribution Transformers Using Minimum Energy Loss Computing

Cited by 7 publications

References 38 publications

Improved Methodology for Power Transformer Loss Evaluation: Algorithm Refinement and Resonance Risk Analysis

Improved Methodology for Power Transformer Loss Evaluation: Algorithm Refinement and Resonance Risk Analysis

Optimal Allocation of STATCOM to Enhance Transient Stability Using Imperialist Competitive Algorithm

Investigating and calculating the temperature of hot-spot factor for transformers

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