110kV智能变电站接零保护施工技术优化

Optimization of Construction Technology of 110kV Intelligent Substation Connected to Zero Protection

针对常见的智能变电站接零保护施工技术由线路交叉引起的寿命周期短的问题,提出110 kV智能变电站接零保护施工技术优化。在原有的施工技术基础上,在中性点与地面接触的低电压中,引出N线并将其与外露用电设备相连,同时在一些关键的区域实行重复接地,产生回路保护效应,确保接零保护之一发挥作用。实验结果表明:在实验条件一定的情况下,相比常见的接零保护施工技术,提出的接零保护施工技术敏感性更好,检修成本更低,寿命周期更长,该技术优于常见的接零保护施工技术。

In view of the short life cycle of the common construction technology of the intelligent substation,the optimization of the construction technology of the 110kV intelligent substation is put forward.Based on the original construction technology,in the low voltage of neutral point contacting with the ground,n-wire is drawn out and connected with exposed electrical equipment.Meanwhile,repeated grounding is carried out in some key areas to produce loop protection effect and ensure that one of the zero connection protection plays a role.The experimental results show that,under certain experimental conditions,compared with the common construction technology,the proposed construction technology is more sensitive,maintenance cost is lower and the life cycle is longer,which is better than the common construction technology.