Browse Prior Art Database

New Maintenance Concept for Gas Insulated Switchgear

IP.com Disclosure Number: IPCOM000238282D
Publication Date: 2014-Aug-14
Document File: 6 page(s) / 196K

Publishing Venue

The IP.com Prior Art Database

Related People

Adrian WIDMER: AUTHOR [+2]

Abstract

In the present disclosure, a new and innovative maintenance and expansion concept for substations with a double busbar (DBB) layout including multiple bays with a gas-insulated switchgear (GIS) is described. This concept is based on a new busbar connection module, which can be equipped with different conductor variants. By replacing the standard conductor variant in case of a failure in the bay, a disconnecting gap is created between the busbar and the bay, which enables continuous operation of the substation without interruption while the fault is resolved safely. Another conductor variant is built in to enable expansion of the substation while one busbar remains energized. In this setup, a disconnecting gap is created between the energized part of the busbar and the end of the busbar to which the new bay is attached.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 32% of the total text.

Page 01 of 6

 

Title: New Maintenance Concept for Gas Insulated Switchgear

Author: Adrian Widmer, René Kallweit

Abstract

In the present disclosure, a new and innovative maintenance and expansion concept for substations with a double busbar (DBB) layout including multiple bays with a gas-insulated switchgear (GIS) is described. This concept is based on a new busbar connection module, which can be equipped with different conductor variants. By replacing the standard conductor variant in case of a failure in the bay, a disconnecting gap is created between the busbar and the bay, which enables continuous operation of the substation without interruption while the fault is resolved safely. Another conductor variant is built in to enable expansion of the substation while one busbar remains energized. In this setup, a disconnecting gap is created between the energized part of the busbar and the end of the busbar to which the new bay is attached.

Background

Conventionally, gas insulated switchgears (GIS) are built from a few versatile building blocks that enable construction of various layouts and bus schemes. Typically, the GIS includes several components such as circuit breakers, disconnectors, grounding switches, voltage transformers, connecting elements and the like. Each component of the GIS is contained within a gastight enclosure filled with pressurized SF6 insulating gas. The SF6 - gas is completely sealed within the system. Partition insulators divide the switchgear into individually serviceable gas compartments.

Statement of the problem:

In substations with a DBB layout with multiple bays in which the disconnector is part of the busbar, complex measures need to be taken in order to ensure that only one bay goes out of service in case of a fault. Further, expansion of substations with a DBB layout including a conventional GIS configuration with a further bay without interrupting both busbars of the DBB is more complicated and requires more procedural steps.

Therefore, there exists the demand for providing a concept, which guarantees that only one bay goes out of service in case of any fault, maintenance or expansion operations.

 


Page 02 of 6

 

Solution of the problem:

The idea of the invention is to employ a busbar connection module with different exchangeable conductor variants, which are used during maintenance or expansion.

With reference to Figs. 2A to 2C, a method for replacing a current transformer module in a substation with a DBB layout is described, which guarantees that only one bay goes out of service when the current transformer module is replaced.

Fig. 2A shows a section of a substation with a DBB layout including a first busbar (BB1), a second busbar (BB2), a first bay (Bay A) and a second bay (Bay B). The first busbar (BB1) is in an active state, as indicated by the red colored line. The second busbar (BB2) is in an inactive state, as indicated by the green colored line. Further, in Fig. 2A a fault in the current trans...