An Algorithm for Effective Mitigation of Commutation Failure in High-Voltage Direct-Current Systems

Son, Ho-Ik; Kim, Hak-Man

doi:10.1109/tpwrd.2016.2520928

Cited by 90 publications

(29 citation statements)

References 17 publications

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“…In [7], the conseil international des grands reseaux electriques (CIGRE) benchmark HVDC system model was adopted to simulate a VSC-integrated LCC-HVDC system to connect an offshore wind farm to a mainland network. In [8,9], the operation of LCC-HVDC systems was investigated during commutation failure using the CIGRE benchmark model with respect to variations in the DC-line voltage and the valve current, respectively. However, the HVDC system models discussed so far need additional modifications to incorporate the operating characteristics of real HVDC systems because the parameters (e.g., rated power, voltage, etc.…”

Section: Introductionmentioning

confidence: 99%

Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground Fault—An Actual Case Study in Korea

et al. 2017

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Abstract:A new modeling method for high voltage direct current (HVDC) systems and associated controllers is presented for the power system simulator for engineering (PSS/E) simulation environment. The aim is to improve the estimation of the transient DC voltage and current in the event of an AC line-to-ground fault. The proposed method consists primary of three interconnected modules for (a) equation conversion; (b) control-mode selection; and (c) DC-line modeling. Simulation case studies were carried out using PSS/E and a power systems computer aided design/electromagnetic transients including DC (PSCAD/EMTDC) model of the Jeju-Haenam HVDC system in Korea. The simulation results are compared with actual operational data and the PSCAD/EMTDC simulation results for an HVDC system during single-phase and three-phase line-to-ground faults, respectively. These comparisons show that the proposed PSS/E modeling method results in the improved estimation of the dynamic variation in the DC voltage and current in the event of an AC network fault, with significant gains in computational efficiency, making it suitable for real-time analysis of HVDC systems.

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Section: Introductionmentioning

confidence: 99%

Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground Fault—An Actual Case Study in Korea

et al. 2017

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“…∆P DC (t P ) = ∆P DC τω n e −ξπ/2 (26) In summary, the key factors of the power fluctuation amplitude of an AC system after a CF include the power drop amplitude, the equivalent commutation time, the oscillation frequency and the damping ratio of the oscillation mode in the system area, and the peak time is mainly determined by the oscillation frequency.…”

Section: The Power Oscillation Mechanism Of An Ac System Caused By Cfsmentioning

confidence: 99%

“…Once continuous CFs occur, they could result in significant direct current increases and thus lead to an overheating of converter valves that would shorten their lifespans [24,25]. To reduce the probability of a CF occurring, many papers have focused on improving algorithms [26][27][28], improving the DC control strategy [29][30][31] and adjusting the network topology [32]. A hybrid configuration had been proposed that inserted a dynamic series capacitor and added fixed parallel capacitors at the valve side of the converter transformer [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

AC Tie-Line Power Oscillation Mechanism and Peak Value Calculation for a Two-Area AC/DC Parallel Interconnected Power System Caused by LCC-HVDC Commutation Failures

Sun

Liu

2020

Energies

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With the rapid development of ultra-high-voltage (UHV) AC/DC, especially the step-by-step upgrading of the UHV DC transmission scale, security presents new challenges. Commutation failure (CF) is a common fault in line commutated converter (LCC) high-voltage direct current (HVDC) power systems. Once failure happens, it may cause power oscillations in a system. In this paper, taking a two-area AC/DC parallel interconnected power system as the example, based on the impulse response model of second-order linear system, the mechanism of power oscillation on the AC tie-line caused by CF are clarified. It is proved that the peak value of the AC tie-line power oscillation is mainly determined by the DC power and the equivalent CF duration, the frequency and damping ratio of dominant area oscillation mode. Meanwhile, the peak time is mainly determined by the oscillation frequency. Finally, the correctness and effectiveness of the algorithms are verified by a simulation analysis of an extended IEEE-39-bus AC/DC parallel interconnected power system. These research results can provide a basis for the arrangement of the operating modes and the formulation of control measures for interconnected power grids.

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“…As to fault location, studies have mainly focused on the impact of commutation failure on the fault location for DC systems [13,14], but ignored the fault location scheme of the inverter AC transmission line, especially under commutation failure. The traditional algorithm for AC transmission line is usually based on two-end fundamental information [15].…”

Section: School Of Electrical Engineering Xipu Campus Southwest Jiamentioning

confidence: 99%

Research on fault location scheme for inverter AC transmission line of AC–DC hybrid system

Deng

et al. 2018

IEEJ Transactions Elec Engng

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memberAs the nonlinear characteristics of converters, the harmonic components of fault information hardly decays with the passage of time, which introduces an estimation error in the fault location in the inverter AC transmission line of an AC-DC hybrid system, especially under commutation failure condition. Therefore, a new fault location scheme, which combines the dynamic synchrophasor measurement algorithm and line equivalent impedance/admittance estimation algorithm, is proposed in this paper. The precision of phasor estimation under harmonic environment has been improved. Based on these, the pre-fault data of one circle is applied to estimate the line equivalent impedance and admittance. Finally, the traditional fault location formula based on the two-end information is employed to calculate the fault location. Evaluation results show that the proposed scheme is independent of the fault resistance, fault distance, and fault type. More importantly, it ensures a higher precision of fault location in comparison with the dynamic fault location algorithm, even under commutation failure.

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An Algorithm for Effective Mitigation of Commutation Failure in High-Voltage Direct-Current Systems

Cited by 90 publications

References 17 publications

Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground Fault—An Actual Case Study in Korea

Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground Fault—An Actual Case Study in Korea

AC Tie-Line Power Oscillation Mechanism and Peak Value Calculation for a Two-Area AC/DC Parallel Interconnected Power System Caused by LCC-HVDC Commutation Failures

Research on fault location scheme for inverter AC transmission line of AC–DC hybrid system

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