Fabricated fireproof and anti-explosion integrated structure of valve side plugging system of extra-high voltage converter station

Abstract

The invention discloses an assembly type fireproof and anti-explosion integrated structure of an extra-high voltage converter station valve side plugging system, and solves the technical problem that an existing converter station valve side plugging system is large in disassembly difficulty and low in efficiency during installation and maintenance, so that the installation and maintenance period is long, and the economic loss of a state grid is increased. The device comprises an upper fireproof anti-explosion module and a lower fireproof anti-explosion module; a sleeving through hole matched with the converter transformer sleeve is formed in the splicing position of the upper fireproof and anti-explosion module and the lower fireproof and anti-explosion module, and the converter transformer sleeve is arranged in the sleeving through hole in a sleeving mode and tightly sealed through a flexible ceramic silicone rubber material. The fireproof and anti-explosion performance of the converter station valve side sleeve plugging system can be effectively improved, fireproof and anti-explosion integration of the plugging system is achieved, the installation and disassembly construction efficiency of the plugging system in the converter transformer overhaul period can be effectively improved, the operation overhaul difficulty is reduced, the converter transformer maintenance or replacement period is shortened, and the maintenance cost is reduced. Therefore, the state grid economic loss caused by power failure is reduced.

Description

technical field [0001] The invention belongs to the technical field of plugging of converter stations, and relates to an assembled fire-proof and explosion-proof integrated structure of a valve-side plugging system of an ultra-high pressure converter station. Background technique [0002] With the construction of the new power system of the State Grid, a large proportion of new energy power generation such as wind, solar and hydropower is connected to the grid, and the safe and stable operation of the power system is facing severe challenges. As an important carrier of the new power system, UHV technology will accelerate the vigorous development. At present, the State Grid has built up to 26 UHV converter stations above ±800kV, and plans to build 14 UHV converter stations. Under the operation of large voltage, high load and complex power grid structure, the safe operation risk of converter transformer is prominent. The converter station is prone to fire, especially the UHV ...

AI Technical Summary

Problems solved by technology

[0003]Currently, the UHV converter station adopts the valve hall sealing and fire prevention reinforcement and the anti-blast door double protection system for fire protection improvement, but there are still the following deficiencies: (1) The separate assembly of the fire-proof sealing and the anti-blast door will form a weak link between the anti-blast door and the bushing, and the energy of the explosion caused by the rheology will bypass this hole and cause a certain impact on the valve side sealing, reducing the fire of the sealing system Defensive capability, there is a hidden danger of fire spreading to the valve hall

(2) The separate assembly of plugging and anti-blast doors does not meet the requirements of lean operation and maintenance

The installation and disassembly process of the two sets of plugging and anti-blast door systems is complicated, and the maintenance or replacement cycle of the rheological transformer is greatly prolonged, which will not only increase the difficulty of operation and maintenance, but also bring a lot of economic losses to the State Grid due to the long power outage cycle

(3) The filling materials used in the plugging system and anti-blast door are not environmentally friendly

Aluminum silicate is the main filler for plugging and anti-blast doors. It has carcinogenic properties. At the same time, the preparation of aluminum silicate requires high-temperature firing, which consumes a lot of carbon energy and does not meet the low-carbon trend.

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