High-voltage and ultrahigh-voltage dry-type air-cored current limiting reactor

Abstract

The invention relates to a high-voltage and ultrahigh-voltage dry-type air-cored current limiting reactor. A main reactor body (1) comprises a coil (10), a rain hat (20) and a combined lazy arm (11), wherein the main reactor body (1) is supported by an insulated support post (30); electric field shielding parts (40) are arranged at the upper part and the bottom part of the main reactor body (1); and each electric field shielding part (40) comprises an upper main reactor body corona ring (41) and a lower main reactor body corona ring (42) to solve the problem of power generation of the main reactor body and accessories at high voltage. The insulated support post (30) comprises a support post insulator (31) and a metal bracket (33); and the metal bracket (33) is connected with a support post insulator (31) through an epoxy flat plate (73) and insulated bolts. According to the high-voltage and ultrahigh-voltage dry-type air-cored current limiting reactor, the requirements on the ground insulation level and support are met; leakage flux is reduced; the requirements on the temperature of accessories are reduced; and the reactor provided by the invention can meet the requirements of power grids of 220kV and 500kV on voltage and current distribution, insulation level and short-time current.

Description

technical field [0001] The invention relates to the technical field of transformer protection equipment, in particular to a high-voltage, ultra-high-voltage dry-type air-core current-limiting reactor. Background technique [0002] With the rapid development of smart grids, 500kV grids have become increasingly dense in recent years. With the change of power flow distribution, the short-circuit current of several 500kV substations exceeds the current 63kA shielding current of the circuit breaker, and there are more substations close to this short-circuit current. [0003] According to the current manufacturing technology of 500kV EHV circuit breakers, the limit short-circuit breaking current of domestic circuit breakers is 63kA. Therefore, the maximum short-circuit current of the 500kV system must be controlled below 63kA. If the short-circuit current of the system is close to this limit, measures must be taken in advance. If it cannot be effectively controlled, it will not o...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a high-voltage, ultra-high-voltage dry-type air-core current-limiting reactor to solve the problem that the high-voltage and ultra-high voltage in the prior art cannot effectively control the excessive current of the system circuit, which affects the safe and stable operation of the system and directly affects the system capacity. Expanded technical issues of

Images