Assessment of the Power Quality in Electric Networks with Wind Power Plants

Gundebommu, Sree Lakshmi; Hunko, Iryna; Rubanenko, Olena; Kuchanskyy, Vladislav

doi:10.1109/ess50319.2020.9160231

Cited by 18 publications

(8 citation statements)

References 14 publications

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“…For the STC to compensate for the phase-to-phase capacitive conductance of the line, its zerosequence reactance must be greater than its positive-sequence resistance. For this, it is necessary to include compensation reactors with high reactance in the neutral of the STC transformers [4][5][6][7][8][9][10][11][12][13][14][15]. In this case, the voltage in the neutral of the transformers will be 0.3-0.4 of the nominal phase voltage of the power transmission U nom .…”

Section: Technical Restrictions Procedures For the Choice Of Values O...mentioning

confidence: 99%

“…Traditionally, the reduction of the secondary arc is achieved by connecting shunt reactors (SHR) and special compensation reactors installed on overhead lines (OHL) in neutral [8][9][10][11][12]. The efficiency of this measure increases when the reactivity of the compensation reactors changes depending on the phase of the line to be switched off and on to the direction of power transmission.…”

Section: Introductionmentioning

confidence: 99%

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The Method of the Secondary Arc Suppression in Cycle Single-Phase Auto Reclose with High-Level Penetration Renewable Energy Sources

Belik,

Kuchanskyy,

Rubanenko

2023

Energies

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Renewable energy sources have a multifaceted impact on power grids, ranging from the reliability and quality of electricity to the selective impact on equipment. While renewables used to be distributed in distribution networks, now their capacity is commensurate with thermal power plants and their impact on the grid should not be underestimated. According to the statistics on the interruption of the bulk electric networks, one of the main reasons for emergency shutdowns of extra high-voltage power lines are single-phase short circuits. The problem of mathematical modeling of the limit modes in terms of static stability is very relevant to the design and operation of electric power systems (EPS). Calculations of limit modes have both an independent value and a component of other electrical engineering tasks related to ensuring the required level of reliability and cost-effectiveness of the operation of the united PS. Despite the great degree of development of issues of planning and control of electric modes, system accidents associated with unacceptable loads of network elements occur in the Ukrainian energy industry. Non-phase modes regularly occur in electric power systems, which can lead to an unacceptable load of intersystem network elements, which imposes significant restrictions on their throughput. Single-phase short circuits are more than 95% of other damage that occurs in the line. The use of single-phase auto reclose on the transmission lines allows disconnecting only the damaged phase for a short period of time and not the entire transmission line. This action preserves the transit of electricity along the line and prevents the violation of the stability of parallel operation. To achieve this, the current-free pause of the single-phase auto reclose should last as short as possible. On the other hand, an important task to be solved when using single-phase auto reclose is to choose the minimum duration of the current-free pause necessary for its success. The problem studied in this paper deals with the safety and correct operation of transmission lines (TS) of the Ukrainian bulk power system in special conditions (not predictable, changing due to frequent attacks). For a quickly changing configuration, the power grid uses switches, and in the case of ultra-high voltage, the TS needs to solve the problem of secondary arc currents and recovering stresses in the place of arc burning after its extinction. One of the methods of reducing secondary arc currents and recovering stresses in the place of arc burning after its extinction is the implementation of single-phase automatic reclosing (SPAR). The main theoretical result of the paper is a proposed mathematical model of a compensated power transmission line based on the use of matrix n-poles, which makes it possible to model in detail stationary power transmission modes, including the SPAR mode. The proposed mathematical model of three-phase power transmission has been created using phase coordinates and can be used for the analysis of complex asymmetric modes. The main practical result of the paper is physically interpreted simplified models of three-phase TS, which can be used for the study of resonant overvoltages and currents of the feeding arc in non-full-phase circuit SPAR. The conclusion that can be drawn from the obtained results points out which line lengths must take into account the influence of longitudinal asymmetry when choosing the inductive resistance, i.e., take into account the dependence of the mode parameters on the location of the damaged phase. The observed results show that the largest values of the multiplicity of overvoltages will take place in phase B. The novelty of the work is the developed technique that makes it possible to determine in advance, depending on the disconnected phase of the line, the values of the primary conductivities of the STC (static thyristor compensators) and the corresponding angles of control of the thyristor switches, which satisfy almost complete compensation of the secondary arc at any point of the line in the specific condition (hard) of the bulk power system operation.

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Section: Technical Restrictions Procedures For the Choice Of Values O...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Method of the Secondary Arc Suppression in Cycle Single-Phase Auto Reclose with High-Level Penetration Renewable Energy Sources

Belik,

Kuchanskyy,

Rubanenko

2023

Energies

Self Cite

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“…The quality of electrical energy significantly affects the reliability and efficiency of electrical networks and power equipment. One of the important indicators of the quality of electrical energy is the level of higher harmonics, which causes non-sinusoidal modes of operation of electrical networks [1,2].…”

Section: Introductionmentioning

confidence: 99%

Research and calculation of the levels of higher harmonics of rotary electric machines in active-adaptive networks

Khomenko,

Nerubatskyi,

Plakhtii

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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In the materials of the article, the parameters of the higher harmonics of the groove frequency are analyzed, which affect the reliability of the operation of electrical equipment and the loss of electrical energy in active-adaptive networks. The influence of higher harmonics of rotary electric machines on the modes of operation of active-adaptive networks and their power equipment is considered. It was established that this influence depends on the energy level of higher harmonics and the modes of operation of active-adaptive networks. A technique is proposed that allows determining the levels of groove harmonic components in the phase windings of electric machines. The calculation of the energy level of higher harmonics was carried out taking into account the electromagnetic asymmetry of rotating electric machines and asymmetric modes of operation of three-phase electric networks using the method of phase coordinates. The obtained results are based on theoretical and experimental studies of the influence of higher harmonics of rotating electric machines on the modes of operation of electrical networks and power energy equipment.

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“…Such stations are installed in electrical distribution networks designed under the conditions of centralized power supply [6][7][8][9][10]. In turn, a number of scientific works of domestic scientists have shown that such stations can affect the quality of electricity and be one of the reasons for their failure [11]. For example, as the frequency increases, the current in the winding will decrease, so the appearance of low-frequency harmonics in the current at the voltage of the transformer (less than 50 Hz) can lead to an increase in current that significantly exceeds the maximum allowable limits (under certain conditions) can damage the transformer winding [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…In turn, a number of scientific works of domestic scientists have shown that such stations can affect the quality of electricity and be one of the reasons for their failure [11]. For example, as the frequency increases, the current in the winding will decrease, so the appearance of low-frequency harmonics in the current at the voltage of the transformer (less than 50 Hz) can lead to an increase in current that significantly exceeds the maximum allowable limits (under certain conditions) can damage the transformer winding [11][12][13]. The current control systems of current measuring transformers (CMT) use known mathematical models of CMT in their calculations, but these models have a significant disadvantage -they cannot determine and take into account the functional relationships between many of their controlled diagnostic parameters simultaneously, in one mathematical model.…”

Section: Introductionmentioning

confidence: 99%

Determination of Residual Resource of Measuring Current Transformers Using Fuzzy Simulation

Rubanenko¹,

Рубаненко²,

Hunko³

et al. 2021

Herald KhmNU

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Assessment of the Power Quality in Electric Networks with Wind Power Plants

Cited by 18 publications

References 14 publications

The Method of the Secondary Arc Suppression in Cycle Single-Phase Auto Reclose with High-Level Penetration Renewable Energy Sources

The Method of the Secondary Arc Suppression in Cycle Single-Phase Auto Reclose with High-Level Penetration Renewable Energy Sources

Research and calculation of the levels of higher harmonics of rotary electric machines in active-adaptive networks

Determination of Residual Resource of Measuring Current Transformers Using Fuzzy Simulation

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