Integrated series water internal cooling circulation system and ventilation structure at the end of the stator of the large condenser

Abstract

The invention discloses a large phase modifier stator end integrated series water internal cooling circulation system and a ventilation structure, and belongs to the technical field of motors. In order to solve the thermal shock problem of too large end components caused by instant reactive compensation of a phase modifier during voltage jump inside an ultra-high voltage power transmission system,the invention provides an end integrated series cooling system that a phase modifier stator circulating cooling water pipe is led out from a stator winding end to enter into an end iron core througha cooler, an outer pressing ring, magnetic shielding teeth, an inner pressing ring and a tooth pressing plate, and the stator circulating cooling water pipe adopts a crossed transposition knitted cooling structure at the magnetic shielding teeth; moreover, an inclined air induction ditch is formed in an air guide rack, and cooling air pressed by a fan at the end of a phase modifier is guided intoan air flue on the back of a section iron core yoke through magnetic shielding in a relatively short-cut path. According to the large phase modifier stator end integrated series water internal coolingcirculation system and the ventilation structure disclosed by the invention, the integral cooling effect of the phase modifier used for the ultra-high voltage power transmission system can be promoted, and safe, stable and reliable operation of the phase modifier are guaranteed effectively.

Description

technical field [0001] The invention relates to a water-cooling circulation system and a ventilation structure at the stator end of a condenser, in particular to an integrated series-connected water internal cooling circulation system and a ventilation structure at the stator end of a large-scale condenser, and belongs to the technical field of electrical engineering. Background technique [0002] As a device that provides reactive power compensation to the grid, the condenser is of great significance to ensure the safe and stable operation of the UHV DC transmission project. [0003] When the grid voltage suddenly increases or sags, the large-scale condenser needs to adjust the rotor excitation in time to absorb or send reactive power to the grid, and then this instantaneous reactive power adjustment changes both the armature current and the excitation current. When the current increases When the magnetic flux leakage at the end increases correspondingly, a large eddy curre...

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Problems solved by technology

[0003] When the grid voltage suddenly increases or sags, the large-scale condenser needs to adjust the rotor excitation in time to absorb or send reactive power to the grid, and then this instantaneous reactive power adjustment changes both the armature current and the excitation current. When the current increases When the magnetic flux leakage at the end increases correspondingly, a large eddy current loss will be induced in the metal structures at the end of the condenser stator. Especially, when the end of the condenser is magnetically shielded, the At the same time as the external magnetic flux leakage, its own electromagnetic loss increases. Whether it is the concentration of losses in the metal components or the magnetic shielding, it will bring a strong thermal shock to the end components of the condenser. If the structure of the end of the condenser or the design of the cooling system is not good Reasonably, this kind of thermal shock will further evolve into unpredictable consequences such as thermal deformation of the end structural parts and vibration of the unit, which will not only affect the service life of the condenser, but also bring harm to the high-voltage transmission system

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