摘要
为进一步提升融冰装置性能,研究了兼备STATCOM动态无功功率补偿以及线路直流融冰功能的系统。该系统采用双链式STATCOM拓扑结构,采用动态无功电流跟踪技术以及中性点偏移的控制方式,实现动态无功功率支撑与线路直流融冰等双重功能。首先介绍了该直流融冰系统的结构,并详细研究了系统控制策略,根据系统应用的不同功能对其输出功率进行分析,同时搭建了基于EMTDC/PSCAD仿真模型对控制策略进行验证。最后,以12 MW直流融冰兼STATCOM系统为例制作了样机进行实验,论证了系统设计的可行性。
To further improve the performance of de-icing equipment, this paper develops a system that combines functions of DC de-icing with dynamic reactive power compensation based on STATCOM. The system utilizes the topological structure of a double chained mode STATCOM, the dynamic reactive current tracking technique, and the neutral point skewing technique, to create the functions of reactive power support and DC de-icing. This paper first introduces the system structure, which is followed by a detailed discussion on the system control strategy. The output power characteristic of the system is then analyzed under different operational conditions to evaluate the system functional performance. In addition, an EMITDC/PSCAD based simulation model is developed to test the control strategy. Finally, a prototype machine with 12 MW rating of the de-icing capacity combined with a STATCOM is developed and used to conduct experiments to verify the feasibility of the system design proposed in this paper.
出处
《中国电力》
CSCD
北大核心
2016年第1期119-126,共8页
Electric Power
