笼型异步风电机组串联耦合补偿低电压穿越研究  

Low Voltage Ride-Through of Squirrel Cage Induction Generator With Series Coupled Compensation

作　　者：熊良根[1] 张建忠[1] 程明[1] 任禹丞[1] 

机构地区：[1]东南大学电气工程学院,江苏省南京市210096

出　　处：《电网技术》2013年第11期3060-3066,共7页Power System Technology

基　　金：国家重点基础研究发展计划项目(973项目)(2013cb035603);国家自然科学基金项目(50977011;51137011)~~

摘　　要：随着我国风电装机容量不断扩大,风电场具备低电压穿越能力已成为其并网发电的必要条件。而传统笼型异步发电机组本身并不具备低电压穿越能力,因此提出了一种串联耦合补偿(series coupled compensation,SCC)新型低电压穿越方案,SCC通过变压器串联接在发电机定子与公共连接点之间,配合双向晶闸管进行投切。在PSCAD/EMTDC建立了750 kW异步发电机组的串联补偿系统,仿真结果表明在各种电压故障下SCC能有效提高机组低电压穿越能力,同时减小电磁转矩振荡。With ever-increasing of installed capacity of wind power generators in China, it becomes a necessary condition for wind farms to be grid-connected to exist the ability of low-voltage ride-through （LVRT）. In view of the fact that traditional squirrel cage induction generator （SCIG） does not exist the LVRT ability, a new LVRT scheme using series coupled compensation （SCC） is proposed： the SCC is connected in series to the position between the stator of SCIG and the point of common coupling （PCC） via a transformer and is switched on/off in coordinating with bi-directional thyristor. By means of PSCAD/EMTDC a simulation model of SCC system for SCIG with capacity of 750 kW is established and simulation results show that in spite of various voltage faults, the SCC can improve the LVRT ability of SCIG unit effectively and suppress oscillation of electromagnetic torque by compensating the voltage drop at PCC.

关 键 词：笼型异步发电机 低电压穿越 串联补偿 暂态稳定性 

分 类 号：TM614[电气工程—电力系统及自动化]