摘要
海上直驱风电机组与交流电网的次/超同步控制相互作用(sub-&super-synchronous control interaction,SSCI)会引发振荡稳定性问题,严重制约海上风电的消纳利用。SSCI特性受系统运行工况和并网风机台数等多因素影响,给振荡抑制方法的设计带来了巨大挑战。提出了一种基于网侧附加阻尼控制(supplementary damping control,SDC)的海上风电系统次/超同步振荡抑制方法。首先基于阻抗模型分析了SDC抑制次同步振荡的机理;然后,介绍了SDC的结构及基于阻尼最大化的参数优化方法;最后,通过电磁暂态仿真验证了SDC的振荡抑制效果。仿真结果表明:SDC能够在多个振荡频率处为系统提供正阻尼,改善风电场在次/超同步频段内的阻抗特性,有效抑制海上直驱风电机组引发的SSCI。
The sub-&super-synchronous control interaction(SSCI)between direct-driven wind turbine generators in offshore windfarm and AC power grid probably cause an unusual stability problem,which seriously restricts the consumption and utilization of offshore wind power.The chracteristics of SSCI are varying with the operating conditions and the number of wind turbine generators,which have brought a great challenge for the design of SSCI suppression method.In this paper,a grid-side supplementary damping control(SDC)scheme based on static var generator(SVG)is proposed to stabilize SSCI in offshore wind farms.Firstly,the impedancebased analysis reveals the mechanism for SDC to suppress the SSCI.Then,the structure of SDC and the parameter optimization method based on damping maximization are introduced.Finally,the oscillation suppression effect of SDC is verified by electromagnetic transient simulation,which shows that the proposed SDC can provide positive damping in a wide range of oscillation frequencies,and the performance demonstrates that SDC can improve the impedance characteristics of the wind farm in the sub-&super-synchronous frequency,and effectively suppress the SSCI caused by offshore direct drive wind turbines.
作者
王红星
郭敬梅
谢志文
尹海庆
WANG Hongxing;GUO Jingmei;XIE Zhiwen;YIN Haiqing(China Southern Power Grid Technology Co.,Ltd.,Guangzhou 510080,China;Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China)
出处
《南方电网技术》
CSCD
北大核心
2021年第11期49-55,共7页
Southern Power System Technology
基金
中国南方电网有限责任公司科技项目(GDKJXM20193398)。
关键词
附加阻尼控制
直驱风电机组
海上风电场
次/超同步控制相互作用
supplementary damping control(SDC)
direct-driven wind turbine generator
offshore wind farm
sub-&super-synchronous control interaction(SSCI)
