摘要
多次发生的大规模风电机组相继脱网事故严重影响集群风电并网消纳和电网安全.当电力系统电压出现跌落时,大容量风电场的切出会影响系统运行的稳定性,这就要求风电机组具备低电压穿越能力,以保证系统出现电压跌落时风电机组不间断并网运行.为研究风电机组与系统的交互影响,探讨了双馈风电机组撬棒保护电阻取值、投切控制策略,并分析了低电压情况下双馈风电机组DFIG的保护控制措施与系统动态特性之间的联系.在DIgSILENT中搭建双馈风电场分析撬棒阻值不同对风机实现低电压穿越的影响,并研究了不同故障情况下双馈风机低电压穿越特性.本文的研究结果可以为风电机组的并网运行和电网的稳定运行提供参考.
Large scale wind turbines tripping accidents have occurred repeatedly,which seriously affect the wind power consumption and power grid security. When the grid voltage drops,the resection of large wind farm will affect the stability of the grid,so it requires the wind generators to have LVRT ability to ensure themselves to keep parallel operating continuously when voltage drops. To study the impacts of wind turbines integrated with grid,the resistance value and switching strategy of crowbar are discussed. And the relation between the protection of DFIG during low voltage fault and the dynamic characteristic of grid is established from the points of generator operation constrains and district grid voltage stability. Doubly fed wind farm is built to validate the effectiveness of crowbar protection by using DIgSILENT. Besides,the low voltage ride through characteristics of doubly fed wind turbine are studied under different fault conditions. The research results can provide references for the grid operation and the stable operation of the wind turbine.
出处
《南京师范大学学报（工程技术版）》
CAS
2016年第1期9-15,共7页
Journal of Nanjing Normal University(Engineering and Technology Edition)
关键词
低电压穿越
双馈风电机组
撬棒
DIGSILENT
low voltage ride through（LVRT）
doubly fedinduction generator（DFIG）
crowbar
DIgSILENT
