CAJ | 학술논문

高压直流电源负载-高功率速调管打火短路瞬间,存储在电源系统分布电容中的能量会向负载释放.如果不加能量吸收装置,这些能量将会全部注入速调管,严重时将损坏速调管.为了保护速调管,提出一种新型装置LR-snubber用来吸收存储在高压电源分布电容系统中的能量.LR-snubber是一个电感与电阻的并联网络串在负载高压输入端,正常运行时电流流过电感,不消耗能量;负载短路时电源系统分布电容(包括传输线分布电容)向短路负载放电,由于放电频率非常高(MHz量级),电感对电流起到阻塞作用,迫使电流流过电阻.因LR-snubber耗能电阻与短路负载的残留电阻串联且远大于残留电阻,所以分布电容储能绝大部分将被LR-snubber耗能电阻所吸收.如果L和R参数配合适当不但可以保护负载,而且不会影响电源投入时电流的上升率.通过仿真分析均验证了LR-snubber思想的可行性和正确性,最后模拟实验表明LR-snubber可以吸收超过90%的分布电容储能.
고압직류전원부재-고공솔속조관타화단로순간,존저재전원계통분포전용중적능량회향부재석방.여과불가능량흡수장치,저사능량장회전부주입속조관,엄중시장손배속조관.위료보호속조관,제출일충신형장치LR-snubber용래흡수존저재고압전원분포전용계통중적능량.LR-snubber시일개전감여전조적병련망락천재부재고압수입단,정상운행시전류류과전감,불소모능량;부재단로시전원계통분포전용(포괄전수선분포전용)향단로부재방전,유우방전빈솔비상고(MHz량급),전감대전류기도조새작용,박사전류류과전조.인LR-snubber모능전조여단로부재적잔류전조천련차원대우잔류전조,소이분포전용저능절대부분장피LR-snubber모능전조소흡수.여과L화R삼수배합괄당불단가이보호부재,이차불회영향전원투입시전류적상승솔.통과방진분석균험증료LR-snubber사상적가행성화정학성,최후모의실험표명LR-snubber가이흡수초과90%적분포전용저능.
The high power klystrons may be irreparably damaged if the energy dumped in stray capacitance between high voltage power supply parts and ground potential parts is more than the critical crater energy of the tube when the load of high voltage supply-high power klystrons had arc faults within the tubes.In order to avoid such problems,we propose a new approach LR-snubber to limit the arc fault effects.LR-snubber is a parallel network connecting to the klystron input terminal.Normally,current flows in the L,no energy is assimilated,when the klystron is arcing,the stray capacitor will discharge into the klystron.The discharging frequency is very high,the L blocks the current and forces it to flow into the R.The R is in series with the klystron rudimental resistance and greatly bigger than the rudimental resistance,so the R can assimilate the most of the energy stored in the stray capacitance.If the L and R parameters are reasonable,the LR-snubber can not only protect the klystron but also guarantee that the current rising time is not affected.From the analysis of simulation-the LR-snubber can be proved to be feasible and valid,and the results of simulating experiment show that the 90 percent energy can be assimilated by the LR-snubber.