Abstract
This paper investigates the possible options for achieving a substantial reduction in a substation footprint using air-insulated switchgear as a more environmentally-friendly alternative to gas-insulated substations that use SF6 gas. Adopting a new approach to surge arrester location and numbers, International Electrotechnical Commission (IEC) minimum clearances can be successfully selected instead of the maximum clearances as currently adopted by many utilities, as is the case in the UK. In addition, innovative alternative compact busbar arrangements using vertical and delta configurations have been proposed by the authors. A further opportunity for compaction is offered by the application of compact and integrated technology offered from several manufacturers. The full overvoltage control within the entire substation under any surge condition is a key aspect of the feasibility of this type of substation. This work demonstrates that the new design option can be an attractive alternative for future substation configuration with minimum footprint.
Highlights
Increasing the integration of renewable sources into the grid requires the reinforcement of power networks, and the construction of new lines and substations [1]
This paper describes the combination of a number of existing and new compact solutions, International Electrotechnical Commission (IEC) 60,071 minimum clearances [6,7], innovative busbar arrangements, and non-conventional equipment, which allow for the achievement of a substantial reduction of the substation footprint using air-insulated switchgears
In order to simplify the comparison the conventional and the compact footprint, the analysis has focused on the area required by a single between the conventional and the compact footprint, the analysis has focused on the area required
Summary
Increasing the integration of renewable sources into the grid requires the reinforcement of power networks, and the construction of new lines and substations [1]. This paper describes the combination of a number of existing and new compact solutions, IEC 60,071 minimum clearances [6,7], innovative busbar arrangements, and non-conventional equipment, which allow for the achievement of a substantial reduction of the substation footprint using air-insulated switchgears. All these solutions satisfy the safety requirements as described in current UK standards related to the substations [8,9]. All of these compaction proposals have been introduced as example on the substation bay (Section 5)
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