可控高抗在1000kV交流紧凑型输电线路中的应用  

Application of Controllable Reactors to 1000kV AC Compact Transmission Line

作　　者：周沛洪[1] 何慧雯[1] 戴敏[1] 娄颖[1] 

机构地区：[1]国网电力科学研究院,武汉430074

出　　处：《高电压技术》2011年第8期1832-1842,共11页High Voltage Engineering

基　　金：国际科技合作项目(2008DFR60010)~~

摘　　要：特高压紧凑型输电线路若同示范工程一样采用高补偿度的固定式高抗,将严重限制特高压紧凑型输电线路提高输送能力的优势,增加线路和变压器的损耗。为了克服固定式高抗的缺点,依托长度为500 km特高压紧凑型系统联络线工程,采用EMTP程序模拟计算方法,研究了特高压紧凑型输电线路采用直流助磁式和电抗分级式两种类型的可控电抗器的必要性和可行性。提出了两种类型可控高抗的参数和对故障的响应时间。研究表明:响应时间定为200 ms,可满足无功调节、限制工频过电压、单相重合闸操作过电压和采用0.7～1 s单相重合闸无电流时间间隔的要求。推荐特高压紧凑型输电线路可优先选用单独采用高速真空开关的电抗分级式可控高抗,而无需断路器并联双向控硅阀,500 kV可控高抗现场试验结果也证明了该建议是可行的。In order to overcome disadvantages of general UHV AC reactor, the necessity and feasibility of application of magnetically controlled type and reactance stepping controlled type of UHV AC reactor are studied by EMTP simulation, on the basis of a project of 500 km UHV AC compact transmission line connected in between two 500 KV power network. The parameters and response time to llne fault of the two types of controllable reactor are pres- ented. The results reveal that 200 ms response time should be specified, which is able to meet the requirements of reactive power adjustment, limitation of power frequency overvoltage, and 0.7 s time interval without second arc current for single reclose of line circuit breakers. The reactance stepping controlled type reactor only controlled by high speed vacuum switch is recommended to be selected in preference. The bidirectional thyristor valve collected parallel with vacuum switch is not necessary, and the field test result of 500 kV controllable reactor can prove this feasibility of suggestion.

关 键 词：特高压(UHV) 紧凑型输电线路 可控高抗 故障响应时间 过电压 无功调节 

分 类 号：TM723[电气工程—电力系统及自动化]