电测与仪表
電測與儀錶
전측여의표
ELECTRICAL MEASUREMENT & INSTRUMENTATION
2014年
13期
98-102,111
,共6页
沙鸥%孙玉坤%张亮%陈晖
沙鷗%孫玉坤%張亮%陳暉
사구%손옥곤%장량%진휘
微电网%电压跌落%动态电压恢复器%超级电容器
微電網%電壓跌落%動態電壓恢複器%超級電容器
미전망%전압질락%동태전압회복기%초급전용기
micro - grid%voltage sag%dynamic voltage restorer%super capacitor
针对微电网电压闪变问题,研究了基于超级电容器储能的新型动态电压恢复器(DVR)系统。通过引入超级电容器储能,有效的利用了超级电容器极高的充放电能力和电荷储存能力,使动态电压恢复器在补偿电压时能快速提供稳定的电压。此外,通过研究基于超级电容的动态电压恢复器的控制策略,采用前馈加反馈的双闭环控制,引入了电容电流反馈,提高了系统的动态响应速度和控制精度。由于直流电源放电功率的提高,动态电压恢复器适用于频繁出现电压跌落的微电网线路,并且对阻性负载和阻感性负载有较好的适应性。仿真结果验证了理论分析的有效性和正确性。
針對微電網電壓閃變問題,研究瞭基于超級電容器儲能的新型動態電壓恢複器(DVR)繫統。通過引入超級電容器儲能,有效的利用瞭超級電容器極高的充放電能力和電荷儲存能力,使動態電壓恢複器在補償電壓時能快速提供穩定的電壓。此外,通過研究基于超級電容的動態電壓恢複器的控製策略,採用前饋加反饋的雙閉環控製,引入瞭電容電流反饋,提高瞭繫統的動態響應速度和控製精度。由于直流電源放電功率的提高,動態電壓恢複器適用于頻繁齣現電壓跌落的微電網線路,併且對阻性負載和阻感性負載有較好的適應性。倣真結果驗證瞭理論分析的有效性和正確性。
침대미전망전압섬변문제,연구료기우초급전용기저능적신형동태전압회복기(DVR)계통。통과인입초급전용기저능,유효적이용료초급전용기겁고적충방전능력화전하저존능력,사동태전압회복기재보상전압시능쾌속제공은정적전압。차외,통과연구기우초급전용적동태전압회복기적공제책략,채용전궤가반궤적쌍폐배공제,인입료전용전류반궤,제고료계통적동태향응속도화공제정도。유우직류전원방전공솔적제고,동태전압회복기괄용우빈번출현전압질락적미전망선로,병차대조성부재화조감성부재유교호적괄응성。방진결과험증료이론분석적유효성화정학성。
To deal with thevoltage sag problem inmicro - grid,the paper studiesthe new dynamic voltage restorer (DVR)system based on supercapacitor energy storage. By introducing the storage,the excellent charge / discharge and electric charge storage capability of the supercapacitor are effectively exploited,which enables the DVR to quickly provide a stable voltage for voltage compensation. In addition,the paper studied thecontrol strategy of supercapacitor based DVR. With feedforward / feedback double - loop control strategy and the introduction of capacitor current feed-back,dynamic response speed and control accuracy of the systemare improved. Due to the increased discharge power of DC power,the DVR can suit the micro - grid line with frequent voltage drops,and can well adapt toresistive load or inductive and resistive load. Simulation results verify the validity and correctness of the theoretical analysis.