Open Access iconOpen Access

ARTICLE

crossmark

A Double-Ended Protection Principle for an LCC-VSC-MTDC System with Strong Anti-Interference Ability

Chuanjian Wu, Dahai Zhang*, Jinghan He

School of Electrical Engineering, Beijing Jiaotong University, Beijing, 100044, China

* Corresponding Author: Dahai Zhang. Email: email

Energy Engineering 2023, 120(2), 299-316. https://doi.org/10.32604/ee.2023.023532

Abstract

The DC grid technology of multi-power supply and multi-drop-point power reception is an effective solution for large-scale renewable energy integration into the power grid. Line-commutated converter-Voltage source converter (LCC-VSC) power grids are one of the more important developmental directions of the future power grid that have occured in recent years. But the multi-terminal high voltage direct current system has the problems of inconsistent boundary characteristics, inconsistent control, and fault response characteristics, which puts higher requirements on the protection scheme. Thus, a completely new protection principle is proposed in this paper. Firstly, the fault characteristics of distributed capacitance current are analyzed. The reactive power calculated by the distribution parameters of different frequencies is different. Subsequently, the fault characteristics of DC reactive power are analyzed, and a DC reactive power extraction algorithm is proposed. The polarity of the multi-band DC reactive power is used to construct the protection scheme. Finally, the LCC-VSC power grid model verifies the correctness and superiority of the proposed protection scheme. The proposed scheme uses DC reactive power instead of fault current to solve the long delay problem caused by distributed capacitance. Compared with the prior art, the proposed solution is not affected by distributed capacitance and has a stronger anti-interference ability (600 + 10 dB + 1 ms).

Keywords


Cite This Article

APA Style
Wu, C., Zhang, D., He, J. (2023). A double-ended protection principle for an LCC-VSC-MTDC system with strong anti-interference ability. Energy Engineering, 120(2), 299-316. https://doi.org/10.32604/ee.2023.023532
Vancouver Style
Wu C, Zhang D, He J. A double-ended protection principle for an LCC-VSC-MTDC system with strong anti-interference ability. Energ Eng. 2023;120(2):299-316 https://doi.org/10.32604/ee.2023.023532
IEEE Style
C. Wu, D. Zhang, and J. He "A Double-Ended Protection Principle for an LCC-VSC-MTDC System with Strong Anti-Interference Ability," Energ. Eng., vol. 120, no. 2, pp. 299-316. 2023. https://doi.org/10.32604/ee.2023.023532



cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
  • 731

    View

  • 448

    Download

  • 0

    Like

Share Link