<trans-title>Analysis on the Lightning Performance and Anti-accident Measures of ±800 kV Bipolar Blocking of Polar Wires and Electrode Wires on the Same Tower

Qian LI; Xuejun WANG; Jingyi WANG; Chunping PAN; Junxiang LIU

doi:10.16516/j.gedi.issn2095-8676.2018.04.013

SOUTHERN ENERGY CONSTRUCTION > 2018 > 5(4): 86-91. > DOI: 10.16516/j.gedi.issn2095-8676.2018.04.013 CSTR: 32391.14.j.gedi.issn2095-8676.2018.04.013

Qian LI, Xuejun WANG, Jingyi WANG, Chunping PAN, Junxiang LIU. Analysis on the Lightning Performance and Anti-accident Measures of ±800 kV Bipolar Blocking of Polar Wires and Electrode Wires on the Same Tower[J]. SOUTHERN ENERGY CONSTRUCTION, 2018, 5(4): 86-91. DOI: 10.16516/j.gedi.issn2095-8676.2018.04.013

Citation:

Analysis on the Lightning Performance and Anti-accident Measures of ±800 kV Bipolar Blocking of Polar Wires and Electrode Wires on the Same Tower

1.
China Energy Engineering Group Guangdong Electric Power Design Institute Co., Ltd., Guangzhou 510663, China
2.
Electric Power Test & Research Institute, Guangzhou Power Supply Bureau Co. Ltd., Guangzhou 510002, China

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Received Date: March 27, 2018
Revised Date: June 18, 2018

Abstract

Abstract

[Introduction] In order to saving the transmission line corridor, the ±800 kV polar wires and electrode wires have been erected on the same tower in the highly urbanized areas such as Guangzhou and Shenzhen. There is an potential risk of bipolar blocking to HVDC system due to configuration of the same tower for both ±800 kV polar wires and electrode wires, but there is little research on it in China.
[Method] In this paper, the process of bipolar blocking caused by the lightning stroke in hybrid transmission lines was analyzed. Taking a project as an example, this paper calculated the lightning flashover rate of hybrid transmission line which erecting polar wires and electrode wires on the same tower by using the ATP-EMTP electromagnetic transient simulation program and the electrical geometric model. Based on this, several measures to reduce the risk of bipolar blocking were discussed.
[Results] The results show that the lightning flashover rate of hybrid transmission line is lower than the independent erecting DC lines. Measures of adding line lightning arrester in the electrode wires, replacing the electrode wires of tower cross-arm for the composite cross-arm, adding the electrode wires insulation level can effectively reduce the risk of bipolar blocking. By comparison of technology and economy, this paper recommended the case project is adopted to improve the electrode wires insulation level as the anti-accident measures. It is suggested that case project should be equipped with 15 pieces of 170 mm structure height insulator.
[Conclusion] This results provide certain technical support for the design of HVDC lines in congested areas.
- on the same tower,
- bipolar blocking,
- lightning shielding,
- induced overvoltage

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References (18)

References

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Junxiang LIU

2.
Electric Power Test & Research Institute, Guangzhou Power Supply Bureau Co. Ltd., Guangzhou 510002, China

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Analysis on the Lightning Performance and Anti-accident Measures of ±800 kV Bipolar Blocking of Polar Wires and Electrode Wires on the Same Tower