A medium voltage solid insulation switch and its use and driving device

Abstract

A medium voltage solid insulated switch (10) and a driving device are provided. The switch comprises an insulating body (11), a switching element (12), a current sensor (13) and a pull rod (14). The current sensor is embedded at a position inside the insulating body and close to a current-carrying conductor (17). The current sensor is extendedly connected with coil (131), which is embedded in the insulating body and is orthogonal to the current-carrying conductor. The driving device comprises two actuators (20) and a linkage for linking an armature (201) of each actuator. The pull rod of the medium voltage solid insulated switch is connected with the linkage. The two actuators are connected in series and are mechanically connected. The current sensor can detect the current flowing through the insulating body and the switching element, and has a substantial advantage over the prior art. The invention can also be used to monitor the operation state of a grid and to present reliable grid operation data. The device that mechanically drives the medium voltage solid insulated switch drives the switching element of the medium voltage solid insulated switch via an efficient direct current electromagnetic mechanism. The switch mechanism uses direct current electromagnetic actuators to operate, and is optionally provided with quick manual opening and closing functions, in which the quick manual closing operation function is unique among this type of switch. And after the manual operation, the mechanism can use the current in the main loop for automatic energy storage.

Description

technical field [0001] The invention relates to a hybrid insulator device for a medium-voltage power distribution network, and is suitable for the power distribution network. More specifically, it relates to a medium-voltage solid insulated switch and its application, a device for mechanically driving a medium-voltage solid insulated switch. Background technique [0002] Distribution networks typically deliver electricity to consumers through the use of connected transmission lines, distribution buses, distribution feeders, and the like. Generally speaking, because electricity can be distributed through more than one path within the distribution network. Depending on the region and the availability of power resources, many power distribution network configurations provide consumers with power from two or more sources. [0003] Electricity distribution networks face a common problem: If there is a momentary short circuit somewhere in the grid, there may be a brief interrupti...

AI Technical Summary

Problems solved by technology

[0003] Electricity distribution networks face a common problem: if there is a momentary short circuit somewhere in the grid, there may be a brief interruption of electrical service

[0014] In case Rogowski coils are used as a current transformer replacement, the problem is that the current representing the output voltage flowing through the load is very small and needs to be amplified by additional positive and negative power supplies, and such small voltages are susceptible to disturbances

To avoid these disturbances in a high voltage environment, additional precautions are taken so that even though the size of the Rogowski coil is smaller than that of a similarly rated current transformer, its cost performance is no longer higher than that of a normal current transformer

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