Analysis on strategies of suppressing secondary arc current in UHV system with controllable shunt reactors

Bin, Han; Ban, Liangeng; Xiang, Zhengrong; Zhang, Yuanyuan

doi:10.1109/powercon.2016.7753968

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…• I e arc are matrices of short-circuit currents (when the line phase is off, there are secondary arcs at the beginning and end of the line); L is described in [3][4][5][6][7][8][9][10]. The values of the elements of the conductivity matrices of the line are considered below and are determined by this algorithm.…”

Section: Parameters Of the Extra-high-voltage Transmission Linementioning

confidence: 99%

“…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: Parameters Of the Extra-high-voltage Transmission Linementioning

confidence: 99%

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

confidence: 99%

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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“…A UHV shunt reactor is an important item of equipment in UHV AC transmission projects. Excessive vibration is one of the most common problems in the operation thereof due to the air gaps in iron beam that provide large inductance and the large rated capacity, which is seven to eight times that of a 500 kV reactor [17]. Adjusting the air gaps can be a useful method to reduce vibrations therein.…”

Section: Influence Of Air Gap Number On Uhv Shunt Reactor Core Vibrationmentioning

confidence: 99%

A New 3D Method for Reactor Core Vibration Based on Silicon Steel Lamination Rules and Application in UHV Shunt Reactors

Lü

Guo

Niu

et al. 2019

Mathematical Problems in Engineering

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A new three-dimensional (3D) analysis method is proposed as the existing two-dimensional (2D) method has low accuracy in analysing the vibration characteristics of oil-immersed shunt reactors, such as ultrahigh-voltage (UHV) shunt reactors. First of all, a set of 3D laminated coordinate systems was defined based on silicon steel lamination rules, in which the anisotropy of magnetic properties for laminated silicon steel in the rolling direction (RD), the transverse direction (TD), and the lamination direction (LD) were considered. Then, the mapping between laminated coordinate systems and space rectangular coordinate system was established to unify the parameters in different laminated coordinate systems. With the mapping, the anisotropy of the magnetic properties in the laminated coordinate systems was transformed into a rectangular coordinate system. Next, two sets of comparative studies between the new 3D method and the traditional 2D method were carried out, which show that the 3D method has high precision and a wide application range. Finally, the relationship between air gap number and core vibration of UHV shunt reactors was studied by the new 3D method. The results show that, as the number of air gaps increases, the magnetic flux density and the total force area of Maxwell force are increased, resulting in the intensification of core vibration. The conclusions of this paper are helpful for the design of large oil-immersed reactors.

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Problems, Methods and Means of Monitoring Power Losses in Overhead Transmission Lines

Blinov

Зайцев

Kuchanskyy

2020

Studies in Systems, Decision and Control

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Analysis on strategies of suppressing secondary arc current in UHV system with controllable shunt reactors

Cited by 7 publications

References 2 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

A New 3D Method for Reactor Core Vibration Based on Silicon Steel Lamination Rules and Application in UHV Shunt Reactors

Problems, Methods and Means of Monitoring Power Losses in Overhead Transmission Lines

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