Distortion Load Identification Based on the Application of Compensating Devices

Shklyarskiy, Yaroslav; Skamyin, Aleksandr; Vladimirov, Iaroslav; Gazizov, Farit

doi:10.3390/en13061430

Cited by 22 publications

(15 citation statements)

References 27 publications

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“…The diode rectifier (DR), despite its drawbacks, is still the most common rectifier used in VFD due to its low-cost. DR supplies DC-link in a noncontrollable way and consumes non-sinusoidal currents from the grid, introducing harmonics of 5, 7, 11, 13, … orders [48,49]. Therefore, DR acts as a nonlinear load for the grid.…”

Section: Methodsmentioning

confidence: 99%

Novel Approach to Collect and Process Power Quality Data in Medium-Voltage Distribution Grids

2021

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The paper is devoted to the development of the structure of a fast and flexible data collecting system based on the proposed approach to measure power quality indicators in three-phase medium-voltage distribution grids with an example of a Mikhailovsky mining and processing plant. The approach utilizes the properties of a space vector, obtained from grid currents and voltages with disturbed waveform, to allow faster extraction of the harmonic components compared to traditional approaches, based on the direct Fourier-transform applied to a line or phase values. During the study, the concept of a universal measurement device was introduced, which allows fast estimation of the following values at the grid node: magnitudes and phases of voltage and current harmonic components, active and reactive power of harmonics and fundamental components, positive and negative instantaneous powers. The structure of interconnected measurement and control units for the considered grid node with simultaneous operation of two active variable frequency drives with active rectifiers was proposed in accordance with a concept of the Internet of things. The benefits of the proposed solution are shown by the example of the model of the grid node with two operating draglines and nonlinear load, which was developed in MATLAB/Simulink software. The proposed approach was utilized to produce distributed references for control systems of grid inverters to compensate nonlinear currents, which allowed to significantly improve THDi of the grid node input power.

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Section: Methodsmentioning

confidence: 99%

Novel Approach to Collect and Process Power Quality Data in Medium-Voltage Distribution Grids

2021

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“…The operation of networks with a voltage of 10 kV of outgoing lines from DSS-10 showed that in the section of the outgoing line at the AHC, when short-circuit currents of 10-12 kA flow, the cable insert at the beginning of the specified line fails very often. This leads to the blackout of a large number of consumers, including the village of Kazreti, which is powered by this line [1,5,11]. The reason is the large value of the flowing short-circuit current and the long time of the relay protection acting on the current interruption [6,10,15].…”

Section: аmentioning

confidence: 99%

Improving the efficiency of relay protection at a mining and processing plant

Klyuev

Босиков

Гаврина

2021

PMI

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The paper presents the results of constructing effective relay protection in the power supply system of a mining and processing plant (MPP). A brief description of the MPP is given, the power supply and substitution circuits used to calculate the short-circuit currents are given. A statistical analysis of failures in the electric network of the MPP has been carried out, which makes it possible to draw conclusions about the nature of failures ranges. Analysis of the registered faults shows that a significant part of them are line-to-earth faults, which in most cases turn into multiphase short circuits, which are interrupted by overcurrent protection. In order to improve the efficiency and reliability of the relay protection, the power supply scheme of the MPP was refined and analyzed. The calculation of the short-circuit currents was made, which made it possible to calculate the settings of the relay protection and give recommendations on the place of its installation and adjustment in order to ensure the normal operation of electricity consumers. To reduce the number of failures to the cable insert on the line leaving the administrative and household complex (AHC), and to increase the reliability of power supply to consumers, it is advisable to divide the capacities of the existing 10 kV line into two parallel ones by laying a second line. It is recommended to install a current cut-off on the line outgoing to the AHC, the feasibility of the installation of which was shown by calculations. This will reduce the chance of failures to the cable gland. Data on the setting currents of overcurrent protection and current cut-off are given on the selectivity card.

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“…The simulation showed that the developed structure operated efficiently during start-up, operation, loading and unloading of the GMEU and SMEU (Figure 8). Then a power electronics unit, consisting of the rectifier, inverter, active rectifier and higher harmonics filters was modeled [20][21][22]. The simulation showed that the developed structure operated efficiently during start-up, operation, loading and unloading of the GMEU and SMEU (Figure 8).…”

Section: Efficient Functioning Of Developed Binary Energy Systemmentioning

confidence: 99%

System of Comprehensive Energy-Efficient Utilization of Associated Petroleum Gas with Reduced Carbon Footprint in the Field Conditions

et al. 2020

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This paper considers the issue of associated petroleum gas utilization during hydrocarbon production in remote petroleum fields. Due to the depletion of conventional oil and gas deposits around the globe, production shifts to hard-to-recover resources, such as heavy and high-viscosity oil that requires a greater amount of energy to be recovered. At the same time, large quantities of associated petroleum gas are extracted along with the oil. The gas can be utilized as a fuel for power generation. However, even the application of combined power modes (combined heat and power and combined cooling heat and power) cannot guarantee full utilization of the associated petroleum gas. Analysis of the electrical and heat loads’ graphs of several oil fields revealed that the generated thermal energy could not always be fully used. To improve the efficiency of the fuel’s energy potential conversion, an energy system with a binary power generation cycle was developed, consisting of two power installations—a main gas microturbine and an auxiliary steam turbine unit designed to power the technological objects in accordance with the enterprise’s power load charts. To provide for the most complete utilization of associated petroleum gas, a gas-to-liquid system is introduced, which converts the rest of the gas into synthetic liquid hydrocarbons that are used at the field. Processing of gas into various products also lowers the carbon footprint of the petroleum production. Application of an energy system with a binary power generation cycle makes it possible to achieve an electrical efficiency up to 55%, at the same time maintaining high efficiency of consumers’ energy supply during the year. The utilization of the associated petroleum gas in the developed system can reach 100%.

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Distortion Load Identification Based on the Application of Compensating Devices

Cited by 22 publications

References 27 publications

Novel Approach to Collect and Process Power Quality Data in Medium-Voltage Distribution Grids

Novel Approach to Collect and Process Power Quality Data in Medium-Voltage Distribution Grids

Improving the efficiency of relay protection at a mining and processing plant

System of Comprehensive Energy-Efficient Utilization of Associated Petroleum Gas with Reduced Carbon Footprint in the Field Conditions

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