Controlled closing on shunt reactor compensated transmission lines. II. Application of closing control device for high-speed autoreclosing on BC Hydro 500 kV transmission line

Froehlich, K.; Hoelzl, C.; Stanek, M.; Carvalho, A. C.; Hofbauer, W.; Hoegg, P.; Avent, B.L.; Peelo, David F.; Sawada, Jun

doi:10.1109/61.584360

Cited by 19 publications

(7 citation statements)

References 5 publications

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“…At the same time, there was also a desire to avoid mechanical complexity and life-cycle cost associated with maintenance of closing resistors. Over the years, BC Hydro worked with breaker suppliers and adopted Point-On-Wave (POW) control schemes on the lead-end circuit breakers for automatic reclose or manual/supervisory line pick-up [1,2]. These controls, together with surge arresters at the line terminals and also at midline of longer lines, are now being used to improve transmission system insulation performance and reduce stress on the connected equipment.…”

Section: Ii2 Point-on-wave Controlmentioning

confidence: 98%

Damaging Open-Phase Overvoltage Disturbance on a Shunt-Compensated 500-kV Line Initiated by Unintended Trip

Nagpal

Martinich

Bimbhra

et al. 2015

IEEE Trans. Power Delivery

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Shunt reactors are applied to long extra high voltage transmission lines to compensate for their natural capacitance which otherwise could cause over-voltages under light load conditions. However, when the level of compensation approaches around 65% or higher, these reactors themselves can, due to contingency, become the cause of hazardous over-voltages during unbalanced openphase conditions on the healthy line. This paper reports on an over-voltage incident that occurred on a 500 kV 72% shunt compensated line in the BC Hydro System. The overvoltage occurred when one of the breaker poles failed to interrupt the current following an inadvertent three-phase trip of the healthy line. The uninterrupted current kept one phase energized for an extended time. Temporary overvoltages during this condition and restrike transients eventually led to surge arrester failures at both terminals.Analysis of recordings of voltage and current provided useful insight into the mechanism responsible for the damaging over-voltages as well as the protection and control responses during the disturbance. The intent of this paper is to share the knowledge gained from analyses of the recorded waveforms with other utilities either having or planning for highly compensated lines.

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Section: Ii2 Point-on-wave Controlmentioning

confidence: 98%

Damaging Open-Phase Overvoltage Disturbance on a Shunt-Compensated 500-kV Line Initiated by Unintended Trip

Nagpal

Martinich

Bimbhra

et al. 2015

IEEE Trans. Power Delivery

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“…As shown in Figure 2, the voltage across the contacts of the circuit breaker takes the form of beat. This beat is due to composition among the fundamental frequency of the system from one side of the contact breaker (system side) and the natural frequency of the line and reactors from the other side of the circuit breaker contact (line side) [3,4].…”

Section: Tl Reclosing With Shunt Reactive Compensationmentioning

confidence: 99%

“…The closing instant is determined when the voltage polarities at the source-side and the line-side are identical and when both signals cross by zero. b) Proposed Method (PM) The proposed method [3,4] sends the closing command appropriately such that the poles closing occurs in the first minimum voltage beat across the circuit breaker, after the protection dead time. This method is based on the voltage wave shape across the circuit breaker, independent of voltage zero crossing.…”

Section: Controlled Switchingmentioning

confidence: 99%

Relevant Factors to a Statistical Analysis of Overvoltages - Application to Three-Phase Reclosing of Compensated Transmission Lines

Mestas

Tavares

2013

EPE

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This paper describes the statistical study of important factors that influences transient over voltages resulting from three-phase reclosing of shunt compensated transmission lines. These factors include the model used for transmission line representation and the influence of line transposition. Additionally, the over voltages reduction to proper levels depending on the type of control technique are illustrated and analyzed in statistical terms. The evaluation covers three shunt compensation degrees. The digital simulations were performed using the PSCAD/EMTDC software.

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“…With the rapid development of global economy, the construction scale of extra high voltage (EHV) long transmission line continues to expand, and the reactive power balance and voltage control become more and more important (Chen, Lee, and Chen 1999;Chuang et al 2010;Froehlich et al 1997;Rahman and Khan 2007). Therefore, people are paying more attention to the manufacture of a controllable reactor that has a wide regulation range, smooth regulation process, fast response and low harmonic content (Alves, Pilotto, and Watanabe 2008;Chen et al 2012;Jin, Goos, and Lopes 1994;Tian et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Winding current calculation and harmonic analysis of controllable reactor of transformer type

Liu

Tian

Yin

2015

Australian Journal of Electrical and Electronics Engineering

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The harmonic currents in each of the windings of controllable reactor of transformer type (CRT) have a close relationship with each of its thyristors' trigger angles. Based on the definition of the trigger angle vector, switching sequence and multi-winding regulation mode, the matrix expression for the windings' instantaneous current in the multi-winding regulation mode is obtained by means of subsection linearization; and then a simple method that can directly generate each winding's current waveform is presented. Using Fourier series, the functional relationship in matrix form between Fourier coefficients of all the windings' harmonic currents and the trigger angle vector is deduced, and then the formulae for calculating the root mean square (RMS) of each winding's harmonic current is acquired. The examples show that the proposed formulae for calculating the winding current of CRT and its harmonics in multi-winding regulation mode are correct, which can be used in more general cases, and the formula deduced in the single winding regulation mode described in other relevant literatures is merely a special case of this paper. This work expands the analysis methods of winding currents of CRT, and lays a theoretical foundation for the harmonic optimization and winding capacity configuration of CRT.

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Controlled closing on shunt reactor compensated transmission lines. II. Application of closing control device for high-speed autoreclosing on BC Hydro 500 kV transmission line

Cited by 19 publications

References 5 publications

Damaging Open-Phase Overvoltage Disturbance on a Shunt-Compensated 500-kV Line Initiated by Unintended Trip

Damaging Open-Phase Overvoltage Disturbance on a Shunt-Compensated 500-kV Line Initiated by Unintended Trip

Relevant Factors to a Statistical Analysis of Overvoltages - Application to Three-Phase Reclosing of Compensated Transmission Lines

Winding current calculation and harmonic analysis of controllable reactor of transformer type

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