Low Voltage DC Power Supply and Distribution Technology

doi:10.16628/j.cnki.2095-8188.2020.02.013

Abstract

Abstract: For AC power supply and distribution systems with dual power / dual circuit lines,as it is not able to run in parallel in a long time,when there is a fault or flashover in a circuit,connect the normal circuit to the blackout circuit by bus switch .Because switching takes a certain amount of time ,it can't keep the continuity of the power supply,so as to cause the user load to jump,it is also possible to expand the scope of power supply failure.According to statistics and analysis,in low voltage power supply and distribution systems,DC power supply and distribution system has its unique advantages,the shortcomings of AC power supply can be overcome by using DC power supply on dual circuits.It can meet the requirement of continuity of power supply for users.A DC power supply and distribution technology for low voltage power supply and distribution system was developed.The actual run test proves that the power supply is safe and reliable with good continuity of power supply,and low running costs,small occupancy space,and there is a certain energy saving effect.

Key words: double circuit line, DC power supply and distribution, power grid flashover, current balance, one-way electrical isolation

CLC Number:

TM76

SONG Jiangsong. Low Voltage DC Power Supply and Distribution Technology[J]. DIANQI YU NENGXIAO GUANLI JISHU, 2020, 587(2): 78-83.

References

[1] 郑欢,江道灼,杜翼.交流配电网与直流配电网经济性比较[J].电网技术,2013,37(12):3368-3374.
[2] 宋强,赵彪,刘文华,等.智能直流配电网研究综述[J].中国电机工程学报,2013,33(25):9-19.
[3] 刘怀东,王锦桥,冯志强,等.重合闸时刻对动态安全域的影响及最优重合时刻实用算法[J].电工技术学报,2018,33(8):1854-1862.
[4] 罗勋华,黄纯,潘志敏,等.基于序分量无功功率的单相自适应重合闸[J].电工技术学报,2016,31(11):149-156.
[5] 沈军,舒治淮,陈军,等.自适应重合闸在电力系统中的应用实践[J]. 电力系统自动化,2018(6):152-156.
[6] 秦金飞,程登峰,杨道文,等.多起输电线路外力破坏跳闸事故的试验研究[J].电气技术,2018,19(7):103-106.
[7] 王跃辉. 浅析变电运行的跳闸事故及其处理措施[J]. 科技与企业,2014(21):187.
[8] 宋江颂. 低压配电增加动力UPS设计[J].低压电器,2013,5(34):68-70.
[9] 张良胜,陈进,李黎.变压器变比误差对并联运行环流的影响[J]. 变压器,2010(10):65-68.
[10] 赵辰宇,刘明林.变压器并列运行环流计算书[J]. 电气设备,2013(S0):275-277.
[11] 孙强,王如雪.大功率IGBT模块并联均流问题研究[J].电力电子技术,2004,38(1):4-6.
[12] 侯振义. 直流开关电源技术及应用[M].北京:电子工业出版社,2006.
[13] 孟妍,颜湘武,张珍,等.电动汽车充电电源并联均流技术[J]. 电力电子技术,2011(12):60-62.
[14] 电能质量电压波动和闪变:GB/T12326—2008[S].2009.
[15] 供配电系统设计规范:GB 50052—2009[S].2009.
[16] 江道灼,郑欢.直流配电网研究现状与展望[J]. 电力系统自动化,2012(8):98-104.
[17] 陈晓波,沈兵,乔鸣忠.带大电容的三相整流电路对电网的谐波影响[J]. 船电技术,2009(3):61-64.
[18] 杨涛,陈干,张恒禹,等.基于数字化计算的无源滤波器的优化方法[J].电力电容器与无功补偿,2018,39(2):115-118.