Control Strategy of Grounding Electrode Current for Double-circuit HVDC Transmission Lines on the Same Tower

被引：0
|
作者：
Zhu Y. [1 ,2 ]
Guo Q. [1 ,2 ]
Huang L. [1 ,2 ]
Li S. [1 ,2 ]
Guan H. [1 ,2 ]
机构：
[1] State Key Laboratory of HVDC, Electric Power Research Institute of China Southern Power Grid Company Limited, Guangzhou
[2] Key Laboratory for Power System Simulation, Electric Power Research Institute of China Southern Power Grid Company Limited, Guangzhou
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2018年 / 42卷 / 18期
关键词：
Control strategy; DC bias of transformer; Double-circuit transmission lines on the same tower; Grounding electrode current; High voltage direct current (HVDC) transmission;
D O I：
10.7500/AEPS20171207009
中图分类号：
学科分类号：
摘要：
The grounding electrode current could cause many problems, such as DC bias of transformers, erosion of metal facilities underground, and so on. To restrain the bad effects of grounding current, the existing studies mainly focus on the technologies, such as increasing protection measures on the side of equipment, as well as the use of distributed DC grounding electrodes. So far, there is no control strategy of the grounding current at the source has been put forward. Therefore, this paper proposes two control strategies of the grounding current combining with the control and protection properties of double-circuit high voltage direct current (HVDC) transmission lines on the same tower. The first one is to reveal the defects when applying the function by checking the control logic of the existing grounding current limitation function and verify those defects one by one. On this basis, the optimization method of control logic is further put forward. The second one is to add a new bipolar shunt trip-ping function in one circuit in the HVDC control system. The function blocks one pole immediately after another pole is protectively blocked. Finally, these two kinds of control strategies are both tested by real-time digital simulation (RTDS) platform, and the results validate the correctness and effectiveness of the control strategies. © 2018 Automation of Electric Power Systems Press.
引用
收藏
页码：169 / 176
页数：7
相关论文
共 15 条
  • [1] Zhong H., Xia Q., Ding M., Et al., A new mode of HVDC tie line operation optimization for maximizing renewable energy accommodation, Automation of Electric Power Systems, 39, 3, pp. 36-42, (2015)
  • [2] Li S., Wang X., Zhang A., Et al., Control strategies for HVDC transmission system with parallel connection of converters, Automation of Electric Power Systems, 39, 21, pp. 132-137, (2015)
  • [3] Jin W., Li Y., Yin Y., Et al., Optimum scheme and its probabilistic sensitivity analysis for wind power transmitted through UHV transmission corridors bundled with thermal power, Automation of Electric Power Systems, 40, 6, pp. 126-133, (2016)
  • [4] Jiang W., Liu J., Han F., Et al., Improvement of back to back DC transmission system control strategy for weak AC system, Automation of Electric Power Systems, 40, 6, pp. 71-77, (2016)
  • [5] Li L., Wang Y., Simulation of control strategy for multi-convertor paralleled HVDC transmission system, Automation of Electric Power Systems, 39, 24, pp. 80-85, (2015)
  • [6] Zhu Y., Guo Q., Li S., Et al., Realization of high voltage direct current operating without grounding electrode, Automation of Electric Power Systems, 40, 16, pp. 153-157, (2016)
  • [7] Zeng Q., Li F., Hao Y., Et al., Analysis on spill current of UHVDC transmission system in monopole-grounded return operation mode and its countermeasure, Automation of Electric Power Systems, 38, 22, pp. 123-127, (2014)
  • [8] Li X., Wen X., Lan L., Et al., Test and simulation for single-phase transformer under DC bias, Proceedings of the CSEE, 27, 9, pp. 33-40, (2007)
  • [9] Li H., Cui X., Liu D., Et al., Influence on three-phase power transformer by DC bias excitation, Transactions of China Electrotechnical Society, 25, 5, pp. 88-96, (2010)
  • [10] Meng X., Liao Y., Li R., Et al., Research on repressive measures of the influence of the ground return current on the metallic pipeline, Southern Power System Technology, 9, 2, pp. 62-67, (2015)
12