Waveform Difference Based Adaptive Restart Strategy for LCC-MMC Hybrid DC System

Liang, Chenguang; Li, Meng; Zhang, Dahai; Nie, Ming; Mirsaeidi, Sohrab; Xu, Yin; He, Jinghan; Luo, Yiping

doi:10.1109/tpwrd.2022.3148179

Cited by 4 publications

(8 citation statements)

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“…several times of rated current). On the other hand, [11–13, 16, 17] recommend that the amplitude of the injection signal should generally not exceed 0.2 times the rated current. In summary, the suggested amplitude of the injection signal (i.e.…”

Section: Injection Signal Strategy Of Lccmentioning

confidence: 99%

“…The core idea of fault properties identification in DC lines is to determine whether the fault has disappeared [11][12][13][14][15][16]. Since HVDC transmission systems generally have a bipolar topology with symmetrical positive and negative poles, pole-to-ground (PTG) and pole-to-pole (PTP) faults have similar fault characteristics.…”

Section: Temporary Fault Scenariosmentioning

confidence: 99%

“…) According to (11), the difference between the I b and I' b is related to the shunting at the fault branch. After introducing the Euler formula, cosh[γ(d−x)] can be further described as cos(2π(d−x)/λ), λ is the wavelength.…”

Section: Permanent Fault Scenariosmentioning

confidence: 99%

“…The amplitude of CV and MV of the injection signal is less affected by the fault distance x when the frequency of the injection signal is lower. Therefore, (11)…”

Section: Permanent Fault Scenariosmentioning

confidence: 99%

“…However, the method does not involve fault properties identification and needs further research. In [11], a fault properties identification method for the hybrid HVDC transmission system with traveling wave waveform characteristics is proposed. However, the principle only applies to the two-terminal transmission system and is easily influenced by factors such as sampling rate and the characteristics of the remote end system.…”

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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Section: Injection Signal Strategy Of Lccmentioning

confidence: 99%

Section: Temporary Fault Scenariosmentioning

confidence: 99%

Section: Permanent Fault Scenariosmentioning

confidence: 99%

“…The amplitude of CV and MV of the injection signal is less affected by the fault distance x when the frequency of the injection signal is lower. Therefore, (11)…”

Section: Permanent Fault Scenariosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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