节能型10kV TSC在光伏发电场中的应用  

Application of Energy-saving 10 kV TSC on Photovoltaic Power Plant

作　　者：王笑棠 王曜飞 周月宾[2] 饶崇林 毕仁明 沈高峰 王立娜 

机构地区：[1]国网浙江缙云县供电公司,浙江缙云321403 [2]浙江大学电气学院,浙江杭州310058 [3]浙江桂容谐平科技有限责任公司,浙江杭州310030

出　　处：《电力电容器与无功补偿》2015年第5期18-23,共6页Power Capacitor & Reactive Power Compensation

摘　　要：光伏电厂需要配置一定的无功补偿装置,并联电容器是一种主要的无功补偿方式。笔者提出一种节能型晶闸管投切电容器TSC,能够有效降低机械开关投切电容器引发的电能质量问题,并且有效克服了常规高压TSC可靠性不够高、损耗较大的缺点。该节能型TSC的关键在于投切开关,三相中的任意2相采用晶闸管和交流接触器相互并联组成复合开关,剩余1相采用交流接触器作为投切开关。在工作过程中,节能型TSC的晶闸管阀仅在投入和切除过程中流过交流电流,晶闸管阀的有功损耗显著降低,可无需散热装置。通过在PSCAD/EMTDC平台上的数字仿真证明该节能型TSC是完全可行的。A definite reactive compensation devices are needed in photovoltaic power plants and shunt capacitor is a kind of main reactive compensation mode. In this paper,a kind of energy-saving thyristor switched capacitor（TSC） is proposed by the authors,which can reduce efficiently the power quality problems due to switching of capacitor by mechanical switch and also overcome efficiently such shortcoming of conventional high voltage TSC as low reliability and big loss. The key point of the energy-saving TSC is in the switch,among which any two of the three phases use thyristors and AC contactors in parallel to consist into composite switch and the rest one only uses AC contactor as switching switch. During the operation period,AC current flows only in the switching on and off period of the thyristor of energy-saving TSC＇s and the active loss of the thyristor is reduced significantly without radiation device. It is proved by the digital simulation on the PSCAD/EMTDC platform that this energy-saving TSC is completely feasible.

关 键 词：光伏发电 无功补偿 晶闸管投切电容器 

分 类 号：TM615[电气工程—电力系统及自动化]