摘要
以三电平双馈风电变流器为平台,提出一种经典撬棒(Crowbar)电路模块,在分析其工作原理的基础上,应用准确的理论计算模块内功率器件在低电压穿越(LVRT)阶段下的最大损耗,确定损耗安全阈值。应用热分析软件建立Crowbar模块模型,并结合计算出的损耗值分析Crowbar模块的最大温升,确定安全温升阈值。根据分析结果制定改进控制策略,通过2 MW双馈风力发电实验平台验证了该策略的正确性与可行性。
Maximum power loss in the device under the low voltage ride through （LVRT） stage is calculated based on the accurate theory after proposing a classical Crowbar circuit module in the planfform of a three-level double-fed wind power converter system, to determine the safety loss threshold.The Crowbar module model is built using the application of thermal analysis, and using the calculation results to analyze the maximum temperature of the crowbar module ,to decide the theory safety temperature threshold.The improved control strategy is made, and the correctness and feasibility of this strategy are proven through the 2 MW double-fed wind power generation experimental platform.
出处
《电力电子技术》
CSCD
北大核心
2014年第8期1-2,共2页
Power Electronics
关键词
变流器
撬棒损耗
低电压穿越
converter
crowbar loss
low voltage ride through
