基于改进网侧控制策略的半直驱风电系统FFRT研究  

Flexiable Fault Ride Through Capability Improvement of Semi-Direct Drive Wind Power System Based on Improved Grid-Side Control Strategy

作　　者：郭江涛 陈烁 黄丽玲 GUO Jiangtao;CHEN Shuo;HUANG Liling(Mingyang Smart Energy Group Limited,Zhongshan 528537,Guangdong,China)

机构地区：[1]明阳智慧能源集团股份公司,广东中山528437

出　　处：《南方能源建设》2023年第1期146-153,共8页Southern Energy Construction

基　　金：广东省2022年省级促进经济高质量发展海洋六大产业专项资金项目“16 MW级超大型海上风力发电机组及关键部件的研发”(粤自然资合[2022]25号)。

摘　　要：[目的]为改进半直驱风电系统的故障电压穿越(Flexible Fault Ride Through,FFRT)能力,提出采用电网故障时无功优先的改进网侧控制策略。[方法]在分析传统网侧控制策略的基础上,根据最新的故障电压穿越能力测试规程在传统网侧控制加入无功优先控制,在电网暂态故障期间优先向电网注入无功电流支撑电网电压恢复。根据改进网侧控制策略,对电网深度跌落和升高时采用卸荷电路结合改进网侧控制策略实现了风电机组的FFRT仿真运行,结合某项目6 MW半直驱风电机组,采用移动故障电压穿越测试设备进行故障电压现场测试。[结果]测试和仿真结果表明,改进网侧控制策略可提升半直驱风电系统的FFRT运行,无功电流稳定控制。[结论]改进网侧控制策略可在多种对称低电压/高电压故障工况和不对称高电压故障工况下优先向电网注入对应的稳定无功电流,有利于辅助电网电压恢复和提升半直驱风电系统的FFRT能力。[Introduction]In order to improve the flexible fault ride through(FFRT)capability of semi-direct drive wind power system,this paper proposes an improved grid-side control strategy with reactive power priority.[Method]Based on the analysis of the traditional grid side control strategy,reactive power priority control was added to the traditional grid side control according to the latest test rules of fault voltage ride through capability,and reactive current was injected into the grid to support the voltage recovery during the transient faults of the grid.According to the improved grid-side control strategy,the FFRT simulation operation of wind turbine was realized by using chopper circuits combined with the improved grid-side control strategy when the deep sag and rise of the grid was realized.Combined with the 6 MW semi-direct drive wind turbine of a certain project,the fault voltage ride field test was carried out by using mobile FFRT test equipment.[Results]The test and simulation results show that the improved grid-side control strategy can improve FFRT operation of semi-direct drive wind power system and stable control of reactive current.[Conclusion]The improved grid-side control strategy can give priority to injecting the corresponding stable reactive current into the grid under various symmetric low voltage/high voltage fault conditions and asymmetric high voltage fault conditions,which can assist the voltage recovery of the grid and improve the FFRT capacity of the semi-direct drive wind power system.

关 键 词：故障电压穿越 改进控制策略 无功电流 半直驱风电系统 卸荷电路 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程] TM614[电气工程—电力系统及自动化]