摘要
针对180 MW的风电场在电网电压不对称故障下,对整个风电场群组各电气量造成的影响,提出了将三、单相动态电压恢复器(DVR)串联在风电场35 k V等级上的解决方案。对电网电压不对称时DFIG数学模型的暂态特性进行了理论分析,并且利用DVR对风电场35 k V出口电压进行补偿,可使风电场群组的定子电压、转子电流和直流侧电压恢复至正常状态。采用正弦幅值积分器(SAI)作为电网电压的检测电路为DVR提供触发信号。在MATLAB/Simulink中建立了风电场和DVR仿真模型,仿真结果表明,在电网电压不对称故障时,投入DVR可以有效提升风电场不脱网运行能力。
For the asymmetrical grid voltage fault has impact on each electrical parameter in the entire 180 MW wind farm group, the three-phase and single-phase dynamic voltage restorer （DVR） system in series with the wind farm 35 kV level were proposed. Moreover, the transient characteristics theoretical analysis of DFIG mathematical model in the grid voltage asymmetry is presented. And the DVR system is used to compensate for 35 kV exports voltage in the wind farm, which can enables stator voltage, rotor current and DC side good running in wind farm group. Besides,the sinusoidal amplitude integrator （SAI） is regarded as the grid voltage detection circuit addition, the wind farms and DVR system simulation model provides a trigger signal for the DVR. In were built in MATLAB / Simulink. And the simulation results show that the DVR system can effectively enhance grid-connected operation capacity when there is asymmetrical grid voltage fault.
出处
《可再生能源》
CAS
北大核心
2016年第8期1203-1208,共6页
Renewable Energy Resources
基金
内蒙古新能源发电系统专用电网技术试验改造资助项目(2014DW10566)
关键词
风电场
电网电压不对称故障
正弦幅值积分器
动态电压恢复器
不脱网运行
wind farm
symmetrical grid voltage fault
sinusoidal amplitude integrator
dynamicvoltage restorer
grid-connected operation
