Study on the characteristics of secondary arc current of UHV high compensation degree TCSC line under the fine-tuning mode
Author:
He Baina1ORCID, Xie Yadi1ORCID, Zhang Jingru1ORCID, Nair Nirmal-Kumar C.2, He Xingmin1, Dong Yanchen1
Affiliation:
1. College of Electric and Electronic Engineering, Shandong University of Technology , Shandong , Zibo , China 2. Department of Electrical & Computer Engineering , University of Auckland , Auckland , New Zealand
Abstract
Abstract
In the transmission line, the series compensation device is often used to improve the transmission capacity. However, when the fixed series capacitor (FSC) is used in high compensation series compensation device, the stability margin cannot meet the requirements. Therefore, thyristor controlled series compensator (TCSC) is often installed in transmission lines to improve the transmission capacity of the line and the stability of the system. For cost considerations, the hybrid compensation mode of FSC and TCSC is often adopted. However, when a single-phase grounding fault occurs in a transmission line with increased series compensation degree, the unreasonable distribution of FSC and TCSC will lead to the excessive amplitude of secondary arc current, which is not conducive to rapid arc extinguishing. To solve this problem, this paper is based on 1000 kV Changzhi-Nanyang-Jingmen UHV series compensation transmission system, using PSCAD simulation program to established UHV series compensation simulation model, The variation law of secondary arc current and recovery voltage during operation in fine tuning mode after adding TCSC to UHV transmission line is analyzed, and the effect of increasing series compensation degree on secondary arc current and recovery voltage characteristics is studied. And analyze the secondary arc current and recovery voltage when using different FSC and TCSC series compensation degree schemes, and get the most reasonable series compensation configuration scheme. The results show that TCSC compensation is more beneficial to arc extinguishing under the same series compensation. Compared with several series compensation schemes, it is found that with the increase of the proportion of TCSC, the amplitude of secondary arc current and recovery voltage vary greatly. Considering various factors, the scheme that is more conducive to accelerating arc extinguishing is chosen.
Funder
Department of Education of Shandong Province
Publisher
Walter de Gruyter GmbH
Subject
Energy Engineering and Power Technology
Reference28 articles.
1. Xie, YD, He, BN, Wang, LM, Jiang, RZ, Mao, YZ, Zhou, YY. Influence of series compensation degree on secondary arc current characteristics under the different series compensation mode. Int J Emerg Elec Power Syst 2020;21:1–14. https://doi.org/10.1515/ijeeps-2019-0104. 2. Aleena, S, Praveen, M, Anamika, Y, Almoataz, YA. A non-unit protection scheme for double circuit series capacitor compensated transmission lines. Elec Power Syst Res 2017;4:311–25. https://doi.org/10.1016/j.epsr.2017.04.002. 3. Zhan, X, Dai, CB, Liu, HW. Study on high current experiments of measurement box located on platform of series capacitor study on high current experiments of measurement box located on platform of series capacitor compensation for UHV power transmission project. Power Syst Technol 2012;36:26–31. 4. Ma, QY, Zheng, B, Ban, LG. EHV/UHV transmission line with controllable unbalanced shunt reactor. IEEE Trans Power Deliv 2015;30:1458–66. https://doi.org/10.1109/tpwrd.2014.2388224. 5. Zhang, HY, Jiang, JG, Feng, Y. Research on dynamic modeling and digital simulation of TCSC. Proc Chin Soc Electr Eng 2003;23:14–9.
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