摘要
针对Zigzag变压器治理零序电流所存在的缺陷,提出了一种新型的零序电流治理方案。该方案采用了Zigzag变压器与有源电力滤波器相结合的方式。电力有源滤波器能提高配电变压器的零序等效阻抗,而Zigzag变压器能降低有源电力滤波器所承受的电压。该方案极大改善了Zigzag变压器滤除零序电流的性能,减少了Zigzag变压器对配电变压器零序阻抗的依赖,同时也降低了Zigzag变压器和有源电力滤波器的容量与成本,具有较高的性价比和广阔的市场应用前景。仿真与试验的结果表明,该方案是解决目前日益严重的零序电流问题的一种切实可行的方案。
In order to avoid the zero-sequence current, a new method based on Zigzag transformer and active power filter is introduced in this paper. Zigzag transformer can decrease the tolerated voltage of the active power filter while the active power filter is used to increase the equivalent zero-sequence impedance of distribution transformer. This method can effectively improve the performance and at the same time reduce the capacity and cost of Zigzag transformer. This method shows high performance-price ratio and bright market prospects. The simulation and experimental results proved that it is a feasible method to deal with the zero-sequence current problem.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第7期91-93,共3页
Power System Protection and Control
关键词
三相四线制
零序电流
Zigzag变压器
有源电力滤波器
滤波效果
three-phase four-wire system
zero-sequence current
Zigzag transformer
active power filter
filter efficiency
