特高压换流站直流场回路设备抗震性能研究  

Study on Seismic Performance of Interconnected DC Field Circuit Equipment in UHV Converter Substation

作　　者：吴海楠 谢强[1,2] 梁黄彬[1] WU Hainan;XIE Qiang;LIANG Huangbin(College of Civil Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education,Shanghai 200092,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]工程结构服役性能演化与控制教育部重点实验室,上海200092

出　　处：《电力电容器与无功补偿》2023年第5期73-80,共8页Power Capacitor & Reactive Power Compensation

基　　金：国家自然科学基金(51878508);国家重点研发计划(2018YFC0809400)。

摘　　要：为了对比特高压换流站直流场回路抗震性能,以某换流站±400kV直流场回路为研究对象,建立硬导线固定金具、滑动金具和两种垂跨比的软导线4种连接方案下的有限元模型,对不同地震波输入下回路中设备的地震响应进行对比分析。结果表明,直流场回路与设备连接的支柱绝缘子的地震响应较大,回路的连接方式对设备的位移响应和加速度响应有较大影响,另一方面发现软导线连接的低频设备出现了明显的位移和加速度时程单向振荡的现象。直流场回路中低频设备与支柱绝缘子之间连接的软导线存在一个垂跨比临界值,当垂跨比低于临界值时,会造成回路中设备的较大的峰值地震响应。硬导线固定金具连接下设备的位移响应较小,可用适于抗震设防烈度小的区域。硬导线滑动金具连接和分段硬导线加软导线连接加速度响应小,适合于抗震设防烈度较大的区域,但需要注意软导线的垂跨比设置。For comparing the seismic performance of interconnected DC field circuit in UHV converter substation,the±400 kV DC field circuit of certain converter station is taken as the study object to set up the finite element models of such four different types of connection schemes as rigid conductors with fixed fitting,sliding fitting and flexible conductors of two different sag-to-span ratios,and the seismic response of equipment of the circuit under different seismic wave input is compared and analyzed.The results show that the seismic response of DC filed circuit and the support insulator to which the equipment is connected is larger.The connection mode of the circuit has big influence on the displacement response and acceleration response of the equipment.On the other hand,it is found that the low frequency equipment connected by the flexible conductors has an obvious unidirectional oscillation phenomenon of displacement and acceleration.The flexible conductor which is connected between the low frequency equipment and the support insulator in the DC filed circuit has a critical value of the sag-to-span ratio.The sag-to-span ratio of flexible conductors below the critical value will cause a larger peak seismic response of the equipment in the circuit.The displacement response of the equipment which is connected by the rigid conductors with fixed fitting is small and can be used in the area with lower intensity of seismic fortification.The acceleration of both sliding fitting connections and flexible conductors shall be small and can be used in the area with highintensity of seismic fortification.However,the attention shall be paid to the setting of the sag-to-span ratio of the flexible conductors.

关 键 词：换流站设备 硬导线 软导线 抗震性能 垂跨比 

分 类 号：TM721.1[电气工程—电力系统及自动化]