摘要
提出一种适用于大容量电网扰动发生装置的新型电路拓扑,该拓扑具有较强的谐波输出能力。基波逆变器和谐波逆变器采用不同的开关频率和输出滤波器设计,耦合变压器采用合理的变比设计,可有效平衡系统的输出能力和功率损耗,并可保证基波、谐波电压分量的控制精度,满足各类电网故障的模拟。研制了一台690 V/2.5 MVA的经济型移动式电网扰动发生装置,该装置除常规的电网扰动模拟功能外,还可输出2~25次电压谐波,且其电压谐波畸变率可达10%。实验结果证实了该电路拓扑的可行性和有效性。
This paper introduces a new topology suitable for large capacity grid disturbance generator with harmonics output support.The fundamental inverter and harmonics inverter can apply different switching frequencies and different filter designs.With suitable turn ratio setting for the coupling transformer,they can balance output capacity,system losses and control accuracy.An economic 690 V/2.S MYA mobile grid disturbance generator is built according to this topology.It can be used for various grid adaptability testing items including 2~25 order the harmonics with THD up to10%.The experimental results validate its feasibility.
出处
《电力电子技术》
CSCD
北大核心
2014年第5期21-23,共3页
Power Electronics
基金
国家能源应用技术研究及工程示范项目(NY20110405-1)~~
关键词
逆变器
电网扰动
谐波
耦合变压器
inverter
grid disturbance
harmonics
coupling transformer
