特高压交直流线路同塔架设对交流线路电磁暂态特性的影响  

Impact of tower-shared UHV DC and AC line installation on electromagnetic transient characteristics of AC line

作　　者：孙栩[1] 董鹏[1] 朱艺颖[1] 蒋卫平[1] 

机构地区：[1]中国电力科学研究院系统所,北京100192

出　　处：《电力自动化设备》2014年第1期148-153,共6页Electric Power Automation Equipment

摘　　要：分别建立了±800 kV特高压直流输电线路与500 kV、220 kV交流线路同塔架设的电磁暂态仿真模型,分析了交直流线路同塔架设对500 kV、220 kV交流线路感应电压和感应电流的影响和对500 kV、220 kV交流线路潜供电流和恢复电压的影响。分析结果表明,和双回交流线路同塔架设相比,交直流线路同塔架设时,会对500 kV、220 kV交流线路产生如下影响:220 kV和500 kV交流线路中均会产生感应电压和感应电流;500 kV架设线路高抗时线路故障后潜供电流无过零点,否则潜供电流和恢复电压仅略有增加;由于220 kV交流线路通常不装设线路高抗,所以交直流线路同塔架设对其潜供电流和恢复电压影响甚微。针对500 kV架设线路高抗时潜供电流不过零的现象,提出了解决措施。The electromagnetic simulation models are built respectively for ±800 kV UHVDC and 500 kV/ 220 kV AC transmission lines installing on the same tower and the impact of the tower-shared installation mode on the induced voltage and current of 500 kV/220 kV AC line are analyzed,as well as the impact on its arc current and recovery voltage. Analytical results show that,compared with the installation mode of only AC transmission lines on the same tower,the induced voltage and current occur in both 500 kV and 220 kV AC transmission lines;the arc current of 500 kV transmission line with high-voltage shunt-reactor has no zero-crossing point,against which some countermeasures are proposed,while the arc current and recovery voltage of 500 kV transmission line without high-voltage shunt-reactor are slightly increased;because 220 kV AC transmission line usually operates without high-voltage shunt-reactor,its arc current and recovery voltage are impacted very slightly.

关 键 词：特高压输电 直流输电 交流输电 同塔架设 潜供电流 电磁感应 模型 

分 类 号：TM72[电气工程—电力系统及自动化]