Research on DC Protection Strategy in Multi-Terminal Hybrid HVDC System

Zheng, Yuping; He, Jiawei; Li, Bin; Wu, Tonghua; Dai, Wei; Li, Ye

doi:10.1016/j.eng.2021.05.002

Cited by 14 publications

(11 citation statements)

References 15 publications

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“…According to ( 6) and (7), the CV (i.e. I ' b ) of electrical quantities at terminal b calculated by electrical quantity at the terminal a is equal to the MV (i.e.…”

Section: Temporary Fault Scenariosmentioning

confidence: 99%

“…However, considering CV under temporary fault is fixed, the MV can be compared with the CV to distinguish the fault properties further. Therefore, combined (7) and (10), the difference between the I b and I ' b can be further described:…”

Section: Permanent Fault Scenariosmentioning

confidence: 99%

“…The waveform in the time domain can more directly reflect the amplitude difference of the waveform, so the circuit model with distributed parameters in the frequency domain can be converted to the time domain form. The circuit model with distributed parameters of the frequency domain in the hyperbolic function in (7) can be directly converted into a model with distributed parameters in the form of a time domain at a certain frequency [11]. Then the CV of the current at the remote end in the time domain from (7) is shown in (13).…”

Section: The Fault Properties Identification Processmentioning

confidence: 99%

“…The circuit model with distributed parameters of the frequency domain in the hyperbolic function in (7) can be directly converted into a model with distributed parameters in the form of a time domain at a certain frequency [11]. Then the CV of the current at the remote end in the time domain from (7) is shown in (13). The waveforms of the MV and CV in the time domain are also highly similar in theory.…”

Section: The Fault Properties Identification Processmentioning

confidence: 99%

“…Currently, the study is mainly about the protection of hybrid MTDC systems and the identification of fault properties for flexible HVDC systems. The details are as follows: In [7], the protection scheme based on active injection current for MTDC systems is studied. However, the method does not involve fault properties identification and location.…”

Section: Introductionmentioning

confidence: 99%

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Fault properties identification scheme for hybrid MTDC system based on LCC signal injection and distributed parameter line model

Hou

Song

Fan

2023

IET Generation Trans & Dist

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A fault properties identification scheme for a hybrid multi‐terminal DC (MTDC) system is proposed to improve the power supply reliability in the system recovery stage. Firstly, a current signal injection strategy based on line commutated converter (LCC) is proposed using the fault control capability. Secondly, the difference between the calculated value (CV) and the measured value (MV) of the current signal under permanent and temporary faults is analyzed for the distributed parameter line model. By introducing the dynamic time warping (DWT) algorithm to represent the difference between CV and MV, a fault properties identification scheme for permanent fault identification is constructed. Finally, the proposed scheme for permanent fault location with the distributed parameter model is obtained by introducing the trust region reflection (TRR) algorithm. The simulation results show that the proposed fault properties identification scheme has the function of permanent fault identification and location. The proposed scheme fully considers the effects of fault impedance, sampling rate, noise, and data loss. It can be applied to high voltage DC long‐distance transmission lines with LCC.

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“…According to ( 6) and (7), the CV (i.e. I ' b ) of electrical quantities at terminal b calculated by electrical quantity at the terminal a is equal to the MV (i.e.…”

Section: Temporary Fault Scenariosmentioning

confidence: 99%

Section: Permanent Fault Scenariosmentioning

confidence: 99%