Transient Rating of AC Filter in 750 kV/±800 kV Power Transmission Project

LI Jingyan

Electric Power Construction ›› 2013, Vol. 34 ›› Issue (7) : 51-56.

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Electric Power Construction ›› 2013, Vol. 34 ›› Issue (7) : 51-56.

Transient Rating of AC Filter in 750 kV/±800 kV Power Transmission Project

  • LI Jingyan
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Abstract

 

Harmonics that generated in the converter operation in UHVDC transmission project will cause harmful impact on the stability of power system and the communication lines. The AC filter can effectively reduce the hazards of harmonics, improve the reliability of system operation, as well as compensate the reactive power required in the converter operation. In order to ensure the safe operation of AC filters under different conditions, the configuration of arrester and the insulation coordination of AC filter should be reasonable. The 750 kV/±800 kV access solution is the latest access solution of ± 800 kV UHVDC transmission project. According to the requirements of functional specification in UHVDC transmission project and the characteristics of AC filter components, it is the first time in China to calculate the transient load of AC filter under the most severe operating conditions, to study the transient currents, voltage and energy of arrester and AC filter components: capacitance, reactance and resistance, thus the insulation level of each component of AC filter and the parameter configuration of arrester being obtained. The research results show that, when ±800 kV UHVDC transmission project is directly accessed into 750 kV AC system, the reasonable configuration of AC filter and arrester will effectively reduce the protection level of each component of AC filter, and make it meet the requirements of safe operation of UHVDC transmission project. Therefore, the research can provide technical supports for project construction.

Key words

UHVDC power transmission / AC filter / arrester / transient rating / overvoltage

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LI Jingyan. Transient Rating of AC Filter in 750 kV/±800 kV Power Transmission Project[J]. Electric Power Construction. 2013, 34(7): 51-56

References

 


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