GIS bus spare interval power-uninterrupted extension function module and extension method

Abstract

A GIS bus spare interval power-uninterrupted extension function module, which is arranged on a first bus and a second bus of a GIS, comprises a first double-break disconnecting switch (DDS1), a second double-break disconnecting switch (DDS2), a first earthing switch (ES1), a second earthing switch (ES2), a third earthing switch (ES3), an extension end, a first air chamber, a second air chamber, a third air chamber, a fourth air chamber, and a fifth air chamber. The first double-break disconnecting switch (DDS1) and the second double-break disconnecting switch (DDS2) are of the same structure. The first double-break disconnecting switch (DDS1) and the second double-break disconnecting switch (DDS2) are each provided with two isolating breaks at the two sides respectively, and can be separated / connected at the same time. The advantage is that based on the double buses, that power is not interrupted and operation is safe and reliable in the whole process of new interval extension construction and hand-over withstand voltage test of GIS buses can be ensured with only one integrated module.

Description

technical field [0001] The invention relates to the technical field of converter stations / substations with a voltage level of 220kV and above, and more specifically, relates to a GIS bus backup interval non-stop power expansion functional module and a use method. Background technique [0002] With the advancement of electric power technology and the development of the national economy, GIS products have been more and more used in the market relying on a series of advantages such as small footprint, low operating failure rate, light weight, and maintenance-free. [0003] At present, judging from the design of the expansion structure of the spare bay by major mainstream GIS equipment manufacturers at home and abroad, there is only one isolation fracture between the spare expansion bay and the operating busbar, so the original Run the busbar for power outage treatment to avoid personal injury caused by discharge breakdown of the isolation fracture during docking installation, a...

AI Technical Summary

Problems solved by technology

This technology has extremely high requirements on the accuracy of phase angle control, and once the isolation fracture breaks down during the test, it will still affect the normal live operation of the busbar, resulting in power grid accidents

Therefore, the promotion of the same-frequency and same-phase withstand voltage technology is greatly restricted, and it is required that no discharge faults occur at the busbar isolation fracture during the withstand voltage process, otherwise, it will cause a power outage accident in the power grid, and there is a very high risk

Images