论文部分内容阅读
云数据中心与高压变电站共站建设时,高压变电站侧工频接地短路故障会危及通信云数据中心的设备及人员的安全。分析了高压变电站对通信云数据中心的综合危险影响,提出了不同类型的通信局站的综合危险影响允许值,云数据中心对应允许值为2 000 V。云数据中心设备及人身的安全性可通过缩短故障时间来提高人身安全电压及设备绝缘耐受电压来得到改善,将故障切除时间从保守的3 s缩短到100 ms,人身允许的接触电压和跨步电压可提高4.48倍,线缆、二次设备、微机保护装置、计算机的绝缘耐受电压至少提高24.4%。提出了通过在变电站侧降低地电位升和缩短故障切除时间来确保接地故障时共站址通信云数据中心安全的主动防护策略,并建议通信云数据中心与变电站接地系统共站址时对应的变电站地电位升允许值为2 k V、故障切除时间为100 ms、接地电阻限值为0.1Ω。该工作为云数据中心与高压变电站共站建设的工频短路故障危害的防护问题提供了全面的解决方案。
When the cloud data center and high voltage substation are stationed together, the power frequency grounding short circuit fault on the high voltage substation endangers the equipment and personnel in the communication cloud data center. The comprehensive dangerous influence of high voltage substation on the communication cloud data center is analyzed. The allowable value of comprehensive risk impact of different types of communication stations is proposed, and the corresponding allowable value of cloud data center is 2000V. Cloud datacenter equipment and personal safety Improve personal safety by shortening downtime Voltages and equipment insulation withstand voltages improve, reducing troubleshooting time from a conservative 3 s to 100 ms, allowing for personal contact voltage and voltage 4.48 times step voltage can be increased, cables, secondary equipment, computer protection, computer insulation withstand voltage increased by at least 24.4%. Proposed by the substation side to reduce the ground potential rise and shorten the fault removal time to ensure that the ground fault co-site communication cloud data center security initiative protection strategy and proposed communication cloud data center and substation grounding system co-site when the corresponding substation The allowable ground potential rise is 2 kV, the fault removal time is 100 ms, and the ground resistance limit is 0.1Ω. This work provides a comprehensive solution for the protection of power frequency short-circuit fault hazards caused by the total station construction in cloud data centers and high-voltage substations.