摘要
由于LCL滤波器相比于L滤波器有更好的高频滤波功能以及更低的价格成本,逐渐受到广泛应用。但是当前基于LCL型电压源换流器(VSC)的±10 kV柔性直流配电网故障机理还尚未进行过深入讨论。针对"手拉手"式的±10 kV柔性直流配电网,先给出了LCL型VSC应用在柔性直流配电网中的控制模型,之后详细分析了在直流故障下柔性直流配电网的暂态特性,并研究了接地方式、IGBT闭锁与否以及线路阻抗大小对故障情况的影响,最后通过仿真模型证明了理论分析的正确性。
Compared with L filter,LCL filter has better high-frequency filtering function and lower cost,so it is gradually widely used. But at present,the fault mechanism of ±10 kV flexible DC distribution network based on LCL-type voltage source converter(VSC) have not been discussed in depth. In view of ±10 kV flexible DC distribution network of "hand in hand" type,the control model of LCL-type VSC applied in flexible DC distribution network was given,then the transient characteristics of flexible DC distribution network under DC fault were analyzed in detail,and the influences of grounding mode,IGBT blocking or not and line impedance for the situation of fault were studied. Finally,the correctness of theoretical analysis was proved by simulation model.
作者
郭倩雯
许中
周凯
栾乐
马智远
GUO Qianwen;XU Zhong;ZHOU Kai;LUAN Le;MA Zhiyuan(Electric Power Research Institute,Guangzhou Power Supply Co.,Ltd.,Guangzhou 510420,Guangdong,China)
出处
《电气传动》
2022年第3期72-80,共9页
Electric Drive
基金
南方电网公司科技项目(GZHKJXM20170141)
