A lifting wavelet-based protection strategy against DC line faults for Zhangbei HVDC Grid in China

Kong, Ming; Pei, Xiangyu; Pang, Hui; Yang, Jie; Xiang, Dong; Wu, Yanan; Zhou, Xiao

doi:10.23919/epe17ecceeurope.2017.8099256

Cited by 27 publications

(21 citation statements)

References 10 publications

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“…UNDER MODAL-DOMAIN Fig. 1 shows a typical topology of half-bridge MMC based DC grid [16]. The hybrid DCCBs are implemented to interrupt the DC fault current.…”

Section: Equivalent Fault Network Of MMC Based Dc Gridmentioning

confidence: 99%

“…To address the shortcomings of phase-domain methods, the phase-modal transformation (PMT) is employed to decouple the dependency of the poles of transmission lines and the fault analysis under modal-domain is carried out to design the protection schemes. In [15] [16], modal-domain is selected to improve the performance of fault detection algorithms, such as the capability of the faulted pole selection and the robustness to fault resistance. In [15], the line-mode backward travelling-wave voltage associated with WT modulus maximum (WTMM) is adopted.…”

Section: Introductionmentioning

confidence: 99%

“…However, a sampling frequency as high as 1MHz is required. A lifting WT based protection is proposed in [16]. The line-mode travelling-wave voltage with four decomposition layers is calculated to detect the arrival of wave fronts accurately.…”

Section: Introductionmentioning

confidence: 99%

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An Improved DC Fault Protection Algorithm for MMC HVDC Grids Based on Modal-Domain Analysis

Yang

Xiang

et al. 2020

IEEE J. Emerg. Sel. Topics Power Electron.

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Abstract-To detect the DC faults for MMC based DC grids using overhead line transmission, many protection methods in phase-domain have been proposed. These existing protection methods suffer from incomplete function, weak theoretical basis and sensitivity to fault resistance and noise disturbance. To overcome these shortcomings, this paper proposes an improved DC fault protection algorithm using the modal-domain approach for the MMC based overhead DC grids, which decouples interaction between positive and negative poles and mitigates the strong frequency-dependency of the characteristic impedance in phase-domain. The DC fault equivalent circuits are established in modal-domain and the fault characteristics during the initial stage are analysed. Based on the modal-domain analysis, the line-mode reactor voltage which combines fault characteristics of negative and positive reactor voltages, is employed to identify the internal faults. The zero-mode reactor voltage which enlarges the differences between faulty and healthy poles, is employed to select the faulted pole. This method is robust to fault resistance and noise with high detection speed. In addition, it is not affected by power reversal, AC faults and DCCB operation, which are validated and evaluated by simulations in PSCAD/EMTDC.

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“…UNDER MODAL-DOMAIN Fig. 1 shows a typical topology of half-bridge MMC based DC grid [16]. The hybrid DCCBs are implemented to interrupt the DC fault current.…”

Section: Equivalent Fault Network Of MMC Based Dc Gridmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Improved DC Fault Protection Algorithm for MMC HVDC Grids Based on Modal-Domain Analysis

Yang

Xiang

et al. 2020

IEEE J. Emerg. Sel. Topics Power Electron.

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“…Several companies have developed some hybrid DCCB prototypes, such as the 80kV/5ms/9kA DCCB proposed by ABB, the 120kV/5.2kA/5.5ms DCCB proposed by Alstom, the 200kV/15kA/3ms DCCB proposed by State Grid Corporation of China and the 500kV/25kA/3ms DCCB proposed by Nanrui group [3]- [6]. The last two types of hybrid DCCBs will be applied to the ±500kV MMC based overhead DC grid Zhangbei project, which will be commissioned in 2020 [7]. To ensure power system stability, the HVDC systems are required to be able to recover power transmission quickly [8].…”

Section: Introductionmentioning

confidence: 99%

An Adaptive Reclosing Strategy for MMC-HVDC Systems With Hybrid DC Circuit Breakers

Yang

Xiang

Zuo

et al. 2020

IEEE Trans. Power Delivery

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Modular multilevel converter (MMC) based high voltage direct current transmission (HVDC) is an effective solution for large-scale renewable power integration over long-distance. In the overhead MMC-HVDC systems, the high voltage DC circuit breakers (DCCB) are implemented to interrupt the DC fault current. Subsequent to fault isolation, the DCCBs are required to automatically re-close to restore power transmission quickly. However, when the DCCBs are re-closed to permanent faults, they will be tripped again, resulting in a high requirement of interruption capacity for DCCBs and second overcurrent strikes on the HVDC systems. To overcome the drawbacks of the conventional auto-reclosing scheme, this paper proposes an adaptive reclosing scheme based on the active pulse injection from the converter associated with the coordination control of hybrid DCCBs. The single-end adaptive reclosing scheme as well as the two ends adaptive reclosing scheme dedicated to two-terminal HVDC systems and meshed DC grids are presented respectively. By applying this method, the location of faults can also be achieved in the case of permanent faults. In order to verify the effectiveness of the proposed adaptive reclosing schemes, extensive simulations have been conducted under PSCAD/EMTDC.

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“…In order to exclude the influences of the fault and disturbance characteristics of power system, the Wavelet Transform (WT), as an effective method for analyzing sudden changes in input signals, has been widely applied [8]- [9], with the aim of improving the accuracy of detecting the arrival of travelling waves. Reference [10] proposed a two-terminal fault location approach which analyses aerial mode travelling waves and incident ground without using propagation velocity of travelling wave and the data synchronization.…”

Section: Introductionmentioning

confidence: 99%

A Model-Based DC Fault Location Scheme for Multi-Terminal MMC-HVDC Systems Using a Simplified Transmission Line Representation

Liu

Zhao

et al. 2020

IEEE Trans. Power Delivery

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Accurately determining the location of DC pole-to-pole short-circuit faults in modular multilevel converter (MMC) based multi-terminal HVDC (MTDC) systems is key issue in ensuring fast power recovery. This paper proposes an effective DC fault location scheme for the MMC-MTDC that uses an estimated R-L representation of the transmission lines. By using the measured voltage and current data from both ends of the faulted DC line, the proposed fault location formulas can calculate the location of the fault with high accuracy. The simplified R-L representation greatly reduces the computation burden of the fault detection algorithm. Electromagnetic transient (EMT) simulations of a four-terminal MMC-MTDC system on PSCAD/EMTDC are used to confirm the effectiveness of the proposed approach. The results verify that the proposed scheme is robust and almost not affected by the transmitted power or the fault resistance.

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A lifting wavelet-based protection strategy against DC line faults for Zhangbei HVDC Grid in China

Cited by 27 publications

References 10 publications

An Improved DC Fault Protection Algorithm for MMC HVDC Grids Based on Modal-Domain Analysis

An Improved DC Fault Protection Algorithm for MMC HVDC Grids Based on Modal-Domain Analysis

An Adaptive Reclosing Strategy for MMC-HVDC Systems With Hybrid DC Circuit Breakers

A Model-Based DC Fault Location Scheme for Multi-Terminal MMC-HVDC Systems Using a Simplified Transmission Line Representation

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