A 550kv vertical structure insulation metal enclosed switchgear

By linking the centralized drive mechanism with the multi-link system and combining the series connection of current transformers and disconnecting switches, the problem of synchronous closing of the vacuum interrupter in the existing device is solved, thereby improving the reliability and safety of high-voltage operation and optimizing the electric field distribution and space utilization.

CN122292201APending Publication Date: 2026-06-26SHANDONG TAIKAI HIGH VOLTAGE SWITCH +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG TAIKAI HIGH VOLTAGE SWITCH
Filing Date
2026-03-05
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

The existing 550kV vertical structure insulated metal-enclosed switchgear cannot guarantee the synchronous closing of multiple 252kV vacuum interrupters connected in series, resulting in uneven voltage distribution, affecting the switching capacity and operational stability of the switchgear, and even threatening the safety of the power system.

Method used

The system employs a centralized drive mechanism and a multi-link system for linkage control. Drive mechanisms are installed at the bottom of the vertical tank for the closing resistor and the vertical tank for the vacuum interrupter, enabling unified power output and linkage control of the two 252kV vacuum interrupters and the closing resistor. Combined with the series connection of the current transformer and the disconnecting switch, synchronous closing is ensured. The electric field distribution is optimized through the insulating support cylinder and the shielding cover.

Benefits of technology

It achieves precise synchronous operation of the 252kV vacuum interrupter, improves the reliability of high-voltage operation, reduces fault diagnosis and maintenance costs, optimizes electric field distribution and space utilization, and ensures the safety and stability of the equipment.

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Abstract

This application provides a 550kV vertical structure insulated metal-enclosed switchgear, belonging to the technical field of enclosed switchgear. The technical solution is a 550kV vertical structure insulated metal-enclosed switchgear, including an insulating bushing electrically connected to an isolating grounding switch. A vertical tank for closing resistors is located outside the isolating grounding switch, containing a closing resistor. Two parallel vertical tanks for vacuum interrupters are located outside the closing resistor tank, each containing a 252kV vacuum interrupter, and each 252kV vacuum interrupter is connected in parallel with a capacitor. The moving contacts of the two 252kV vacuum interrupters are connected in series via a connecting conductor. A driving mechanism is located at the bottom of both the closing resistor tank and the vacuum interrupter tank, enabling synchronous opening and closing of the closing resistor and the 252kV vacuum interrupters. The beneficial effect is that it ensures synchronous closing of the 252kV vacuum interrupters connected in series.
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