Transmission Tower Switchgear Integration for Compact Line Reconfiguration
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Solution Overview
Problem
High-voltage overhead electric transmission systems require significant land and construction resources due to the need for large substations and crossarms or cantilevered beams to house switchgear units, which increases operational complexity and costs, and limits flexibility in fault extinction.
Innovation Solution
A tower design that integrates a switchgear unit, protection, and command and control system within its structure, eliminating the need for external crossarms or cantilevered beams, allowing for compact installation and reduced land use while maintaining operational flexibility and fault identification capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If switchgear units are installed on external crossarms or cantilevered beams, then operational flexibility and fault extinction capabilities are improved, but land occupation and construction costs increase
Solution Approach 1:
The patent merges the switchgear unit directly into the tower structure, combining functions that were previously separated (tower support structure + external crossarm + switchgear unit) into an integrated assembly. This eliminates the need for external crossarms or cantilevered beams while maintaining all operational capabilities including fault extinction and reconfiguration flexibility.
Solution Approach 2:
The tower structure is designed to serve multiple functions simultaneously: mechanical support for transmission lines, housing for switchgear units, and integration point for protection and command systems. This multi-functional design eliminates the need for separate structures while maintaining operational versatility.
2Reliability
If switchgear units are installed on external crossarms or cantilevered beams, then fault extinction capabilities are improved, but construction costs increase
Solution Approach 1:
The switchgear unit is merged directly into the tower structure, eliminating the need for separate crossarm structures. This integration reduces the total number of components, simplifies assembly procedures, and reduces material requirements while maintaining full fault extinction capability through the circuit breaker and disconnector mechanisms.
3Ease of operation
If traditional ground-based line bays are used, then equipment accessibility and maintenance are improved, but land occupation and fencing requirements increase
Solution Approach 1:
The patent transitions from ground-based equipment installation to elevated tower-based installation. By moving the switchgear unit vertically to the tower structure, the system eliminates the need for horizontal land occupation and fencing while maintaining operational accessibility through remote control capabilities and protected access pathways.
4Area of stationary object
If multifunction devices are used to combine circuit breaker and disconnectors, then land occupation is reduced, but device complexity increases
Solution Approach 1:
The patent combines the circuit breaker and disconnector into a single integrated switchgear unit that performs multiple functions. This multifunctional device includes the circuit breaker for fault extinction, disconnectors for electrical isolation, and integration with protection systems, all within a single compact structure mounted on the tower.
Data Source
AI summary
A tower for a high-voltage overhead electric transmission line has a predetermined shape defining an internal volume of the tower, and carries a first tension side of a first line section and a second tension side of a second line section. The first and second tension sides have respective pluralities of first and second tension terminals, each associated with a respective phase of the high-voltage overhead electric transmission line. The tower supports a switchgear unit connected at a first end to the first line section and at a second end to the second line section and configured to modify grid configuration, interrupting and restoring electrical continuity in pre-established points, to interrupt nominal and fault currents, and to carry out safety operations. The switchgear unit has a plurality of switchgear unit poles, each associated with a respective phase of the high-voltage overhead electric transmission line and including a line circuit breaker and at least one line disconnector.