动态无功补偿对抽水蓄能机组异步起动特性的影响  

Influence of dynamic reactive power compensation on asynchronous starting characteristics of pumped storage units

作　　者：何乐 李晓明[1] 穆显勇 叶宏 王坤杰 HE Le;LI Xiaoming;MU Xianyong;YE Hong;WANG Kunjie(School of Electrical Engineering, Wuhan University, Wuhan 430072, China;Hubei Bailianhe Pumped Storage Co. , Ltd. , Huanggang 438600, China)

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]湖北白莲河抽水蓄能有限公司,湖北黄冈438600

出　　处：《武汉大学学报（工学版）》2018年第6期528-533,546,共7页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:51277134);国网新源控股有限公司科技项目(编号:5257001400S9)

摘　　要：针对抽水蓄能机组的异步起动,提出了一种新型异步起动方式,起动时采用动态无功补偿装置,按容量8∶4∶2∶1的分组方式,利用晶闸管开关实时投入或切除相应的电容器组,减少电机起动时从系统获取的无功功率,以维持电压稳定并提高起动速度.利用Matlab/Simulink仿真软件,仿真研究了机组的异步起动特性,验证了机组异步起动时采用动态无功补偿方式减小系统电压降落的可行性.与直接起动和变频起动方式相比,该方式能有效提高电机起动的安全可靠性,具有一定的优越性.Aiming at the asynchronous starting of pumped storage units,a new type asynchronous starting method is proposed.Dynamic reactive power compensation devices are used for the asynchronous starting in accordance with 8∶4∶2∶1 unequal capacity grouping mode.Thermistor switches are used to put in or cut out respective capacitors in real time to reduce reactive power obtained from the system to maintain grid voltage stability and improve the startup speed.The asynchronous starting characteristics are analyzed by using Matlab/Simulink simulation software.The feasibility of reducing system voltage drop by using dynamic reactive power compensation in asynchronous starting process is verified.Compared with the direct asynchronous starting mode and frequency conversion starting mode,the asynchronous starting mode by using dynamic reactive power compensator has the advantage of improving the safety and reliability.

关 键 词：抽水蓄能机组 异步起动 动态无功补偿器 电压降落 

分 类 号：TM341[电气工程—电机]