LI Hao, LIU Zhao, LI Jianfang. Design and application of a nitrogen recirculation system for the cooling expansion tank within the valve hall[J]. Ningxia Electric Power, 2023, (4).
LI Hao, LIU Zhao, LI Jianfang. Design and application of a nitrogen recirculation system for the cooling expansion tank within the valve hall[J]. Ningxia Electric Power, 2023, (4).DOI: 10.3969/j.issn.1672-3643.2023.04.006.
the valve cooling system is integral to the safe and stable operation of high-voltage direct current (HVDC) systems.Addressing the issue of excessive nitrogen consumption in the cooling expansion tank
which could not be efficiently recycled
this paper calculates the temperature-pressure variation curve for the expansion tank through a theoretical model of the nitrogen regulation system.Subsequently
a nitrogen recirculation system and the corresponding control strategies are designed for the cooling expansion tank inside the valve hall.Through field testing
it has been demonstrated that the designed recirculation system can effectively mitigate the issue of nitrogen consumption in the valve cooling system.This leads to sustained pressure stabilization within the valve cooling system
ensuring the safety and stable operation of the HVDC system.