CAJ | 학술논문

根据常规斩波串级调速系统的拓扑结构，分析了调速设备故障时接触器保护在动作保护过程中主回路的暂态过程。由于接触器动作时间较长，在其动作期间调速设备易受到高电压、大电流的冲击，导致电力电子器件损坏。针对接触器保护的弊端，设计了带电子保护电路的主回路拓扑结构。并分析了高压失电工况下常规的和带电子保护电路的斩波串级调速系统的暂态过程，同时进行详细的理论推导，得出高压失电工况下理论分析的依据。最后在模拟带载试验平台上分别对常规斩波串级调速系统和增加电子保护电路的调速系统在高压失电的工况下进行测试。测试结果表明理论计算与实际测量值基本一致，同时验证了电子保护电路有效解决了有源逆变结构下的高压失电或者逆变颠覆的问题。
근거상규참파천급조속계통적탁복결구，분석료조속설비고장시접촉기보호재동작보호과정중주회로적잠태과정。유우접촉기동작시간교장，재기동작기간조속설비역수도고전압、대전류적충격，도치전력전자기건손배。침대접촉기보호적폐단，설계료대전자보호전로적주회로탁복결구。병분석료고압실전공황하상규적화대전자보호전로적참파천급조속계통적잠태과정，동시진행상세적이론추도，득출고압실전공황하이론분석적의거。최후재모의대재시험평태상분별대상규참파천급조속계통화증가전자보호전로적조속계통재고압실전적공황하진행측시。측시결과표명이론계산여실제측량치기본일치，동시험증료전자보호전로유효해결료유원역변결구하적고압실전혹자역변전복적문제。
According to the topology of conventional chopper cascade speed system, this paper analyzes the transient process of main loop of contactor protection when device failure. Because the contactor action requires a longer time, equipment is vulnerable to the impact of high voltage, high current during the contactor action, and cause damage to power electronic devices. For contactors and fast-cut protection drawbacks, the main circuit topology with electronic protection circuit is designed. Then transient process of conventional chopper cascade speed system and chopper cascade speed system with electronic protection circuit under high voltage power failure conditions are analyzed, and theoretics is detailedly deduced. The basis of theoretical analysis under high-voltage power failure condition is got. Finally, the conventional chopper cascade speed control system and with electronic protection circuits for high-voltage power failure conditions are tested on the simulated load test platforms. Experimental results show that the theoretical calculation is consistent with the actual measured values, and verify that electronic protection circuits effectively solve the problem of high-voltage power failure and inverter subversion under active inverter structure.