变电站220kV电力电缆的选型研究

Study on Selection of 220kV Power Cable in Substation

高压电力电缆在户内站使用较为广泛,为使工程设计选型合理可靠,文章对变电站220kV电缆选型进行研究。首先,对220kV电力电缆的导体材质、芯数、绝缘水平选择等问题进行介绍,重点从载流量、热稳定、允许电压损失选取截面进行研究,并进一步讨论选型中护层感应过电压、电缆敷设的相关问题,然后通过工程实例详细计算分析,提出高压电力电缆选型的合理化建议。

High-voltage power cables are widely used in indoor stations.In order to make the engineering design selection reasonable and reliable,the article studies the selection of 220kV cable in substation.Introduce the 220kV power cable conductor material,core number,insulation level selection and other issues,focusing on the selection of cross-section from current carrying capacity,thermal stability,and allowable voltage loss for research.And further discuss the issues related to the overvoltage induced by the sheath and cable laying in the selection process.Finally,through detailed calculation and analysis of engineering examples,reasonable suggestions for the selecti on of high-voltage power cables are proposed.