Extra-high voltage and high-current ice-melting isolation switch

Abstract

The invention discloses an extra-high voltage and high-current ice-melting isolation switch, which comprises two lateral base upright posts, a middle base upright post and a motor operating mechanism, wherein an integral underframe is fixedly arranged on the lateral base upright posts and the middle base upright post; first post insulators are arranged at two sides of the integral underframe; a second post insulator is rotationally arranged on the integral underframe; one fixed contact is arranged at the top of each of the two first post insulators; a turnover device is arranged at the top of the second post insulator; main knife switches are arranged at two sides of the turnover device; one moving contact matched with the corresponding fixed contact is arranged at one end, far away from the turnover device, of each main knife switch; and the motor operating mechanism is connected with the second post insulator and the turnover device and drives the second post insulator to rotate and the turnover device to turn over, thereby driving each main knife switch to rotate in a horizontal plane and to rotate around axis itself and achieving opening and closing. The extra-high voltage and high-current ice-melting isolation switch is stable and reliable in motion, simple and convenient to operate and high in through-current capability.

Description

technical field [0001] The invention relates to the technical field of electrical engineering, in particular to an ultra-high voltage and large current ice-melting isolating switch. Background technique [0002] The UHV power grid is an inevitable choice to solve the reverse distribution of energy resources and load centers in my country. However, UHV lines have long transmission distances, and the corridors pass through areas with complex terrain and changeable weather conditions, which are prone to severe icing and tower collapses. line accidents. The UHV line has a large transmission capacity, a wide power supply range, and very high reliability requirements. Once the ice-covered tower falls and the line is disconnected, it is easy to cause the large-scale power grid to be disconnected, causing large-scale power outages, and posing a serious threat to the national economy and people's production and life. Therefore, it is urgent to carry out research on ice melting techno...

AI Technical Summary

Problems solved by technology

However, conventional UHV disconnectors have the following defects: (1) The maximum design current of the main conductive tube, moving contact, static contact, and operating mechanism of conventional UHV disconnectors is only 6300A, while the melting ice of UHV lines The current is as high as 12000A, which cannot meet the requirements of its flow capacity and mechanical stability

(2) The moving contact contact plate clamp of the conventional UHV isolation switch is made of aluminum material, and it is a welded structure, relying on the weld seam to flow through, and the design of its flow capacity is greatly restricted

(3) Conventional UHV isolation switches often have low stability and troublesome operation

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