摘要
新型换流变压器及其滤波器具有特殊的绕组接线方案,所以对其运行参数如视在功率、功率因数、网侧电流、负载电压、网侧电流的畸变率等的研究尤为重要。首先建立反映网侧电流和负载电流、负载电压和网侧电压、网侧谐波电流和负载谐波电流关系的数学模型。理论分析表明,未投滤波器时,新型换流变压器跟传统换流变压器的运行参数特性一致;而投滤波器时,新型换流变压器可以有效地降低网侧视在功率,提高网侧功率因数,减少网侧电流、增加负载电压及改善网侧电流的畸变率。最后通过对比理论计算值、仿真结果和实验结果,验证了所推导的新型换流变压器的数学模型的正确性。
The new converter transformer and its filters has particular winding schemes, so researches on its operation parameters including the apparent power, the power factor, grid side currents, load side voltages and the THD of grid side currents are very important. First, three mathematic models are deduced which reflect the relationship between the grid side and the load side currents, the load side and the grid side voltages, along with the grid side and the load side harmonic currents. Theoretical analysis shows that if without filters, the characteristics of the operation parameters of the new converter transformer are the same with the traditional converter transformer. While with filters, the new converter transformer can reduce the grid side apparent power, enhance the grid side power factor, decrease the grid side current, increase the load side voltage, and improve the THD of grid side currents. Finally, theoretical analysis, simulation and experiments results verify the mathematic models derived.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第10期126-133,126-133,共8页
Proceedings of the CSEE
基金
国家自然科学基金项目(51077045
50907018)~~
关键词
新型换流变压器
直流输电
滤波器
数学模型
运行参数
new converter transformer
DC transmission
filters
mathematic model
operation parameters
