Improved differential current protection scheme for CSC‐HVDC transmission lines

Kong, Fei; Hao, Zhiguo; Zhang, Baohui

doi:10.1049/iet-gtd.2016.0995

Cited by 56 publications

(41 citation statements)

References 20 publications

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“…Unlike the traditional current differential protection, which operates with a prescribed long time delay to avoid false tripping due to the effect of the distributed capacitance, the proposed protection scheme operates faster because it is designed to operate during the fault transient period without any time delay. Also, it is worthy to highlight that the effect of the HVDC control system during the initial transient period after fault occurrence is minimal [11, 26]. Accordingly, the HVDC fault currents are not limited by the HVDC system controller, and thus facilitating the detection of the internal faults using the proposed protection scheme.…”

Section: Fault Analysis For External and Internal Faultsmentioning

confidence: 99%

“…In addition, to demonstrate the advantages of the proposed protection scheme, it is compared with the conventional protection scheme and the scheme in [11] considering the required response time for discriminating external faults. Fig.…”

Section: Performance Evaluationmentioning

confidence: 99%

“…Furthermore, the results are shown in Fig. 21 for the scheme in [11]. In [11], the value of

I_{diff}

is the integral value of the differential current over one cycle (20 ms) divided by the number of samples.…”

Section: Performance Evaluationmentioning

confidence: 99%

“…Therefore, the performance of this scheme is highly dependent on the line parameters during the fault transient period. In [11], novel current differential protection has been proposed for LCC‐HVDC bipolar transmission lines, where a low sampling rate can be used. In this scheme, the operating time for some cases reaches ∼40 ms.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Current differential relay characteristic for bipolar HVDC transmission line fault detection

Saber

Zeineldin

EL-Fouly

et al. 2020

IET Generation, Transmission & Distribution

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Section: Fault Analysis For External and Internal Faultsmentioning

confidence: 99%

Section: Performance Evaluationmentioning

confidence: 99%

“…Furthermore, the results are shown in Fig. 21 for the scheme in [11]. In [11], the value of

I_{diff}

is the integral value of the differential current over one cycle (20 ms) divided by the number of samples.…”

Section: Performance Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Current differential relay characteristic for bipolar HVDC transmission line fault detection

Saber

Zeineldin

EL-Fouly

et al. 2020

IET Generation, Transmission & Distribution

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“…With the rapid development of mobile devices and social networks, mobile social networks (MSNs) have become one of the fastest-growing activities among mobile users domestically and worldwide [1]. With modern smartphones or tablets, mobile users can download kinds of applications from Apple Store or Google Play Store [2]. With the help of these applications, on the one hand, users can easily enjoy the convenience provided by different service providers such as location-based services.…”

Section: Introductionmentioning

confidence: 99%

Dynamic social privacy protection based on graph mode partition in complex social network

Qilian

Meng

et al. 2019

Pers Ubiquit Comput

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Differential privacy protection model provides strict and quantitative risk representation for privacy disclosure, which greatly ensures the availability of data. However, most existing methods do not consider the semantic context, so they are vulnerable to attacks based on semantic information. Therefore, dynamic social privacy protection based on graph pattern partitioning is designed to satisfy differential privacy protection. Firstly, the structure of social network is represented as a graph model, and the original graph is classified into several sub-graphs according to the characteristics of nodes. Then, the dense area of each subgraph is divided by quad-tree method, and the noise of differential privacy protection is added to the leaf nodes of the tree, and the graph publishing is generated by sub-graph reconstruction. Finally, the feasibility and practicability of the model are verified by statistical analysis, such as degree distribution, shortest path, and clustering coefficient. The simulation results show the validity and applicability of the privacy protection method proposed in this paper.

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Protection Scheme for Multiterminal HVDC System Based on Wavelet Transform Modulus Maxima

Huai

Liu

Ding³

et al. 2020

IEEJ Transactions Elec Engng

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Non-member Hua Ding ＊＊ , Non-member Liang Qin ＊a , Non-member Fault protection is a major issue in the development of multi-terminal high-voltage direct current (HVDC) system based on voltage-source converter. Owing to the rapid increase in fault current under DC faults, protection requires a fast fault detection method to isolate the fault current. However, the selectivity and reliability of the fast protection scheme should be primarily guaranteed. Therefore, a new protection strategy based on modulus maximum under wavelet transform is proposed in this paper. Fault detection and discrimination are achieved using single-end signals of fault current. The external and internal faults can be discriminated via local information. The reliability and robustness of the proposed scheme against potential factors are verified. Numerous simulation cases are performed in PSCAD/EMTDC under different fault scenarios, and signal data are analyzed in MATLAB to demonstrate the effectiveness of the proposed fault protection scheme.

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Improved differential current protection scheme for CSC‐HVDC transmission lines

Cited by 56 publications

References 20 publications

Current differential relay characteristic for bipolar HVDC transmission line fault detection

Current differential relay characteristic for bipolar HVDC transmission line fault detection

Dynamic social privacy protection based on graph mode partition in complex social network

Protection Scheme for Multiterminal HVDC System Based on Wavelet Transform Modulus Maxima

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