摘要
针对目前缺少研究风电场容量不断扩大和数量日益增多下风电场低电压穿越(LVRT)的问题,以双馈风电场群为例,基于DIgSILENT/PowerFactory软件,采用与电压跌落幅度相关的无功控制策略,研究风电场运行方式、拓扑结构对风机LVRT能力的影响及不同风机对相同点故障的LVRT能力,为考虑LVRT的风电场群输电组网的拓扑优化研究奠定了基础。同时,提出与风电场LVRT要求相配合的分段式低电压保护判据,运用独特的DSL编程语言嵌入风机转子侧保护模块中,实现该保护逻辑和动作功能,最后进行仿真验证。结果证明该保护能很好地满足LVRT的要求。
For the lack of research on the problem of low voltage ride through of wind farms under the trend of in- creasing wind farm capacity and quantity, taking the double-fed wind farms as an example, based on DIgSILENT/Power- Factory software, reactive power compensation and crowbar control strategy was used to study the influence of operation mode and topology structure on the ability of LVRT and the LVRT ability of different wind turbines for the same fault point. Thus, it lays the foundation for the study of the topology optimization of wind farm transmission network consid- ering LVRT. At the same time, the paper puts forward the subordinate low voltage protection criterion which matches the LVRT requirement of the wind farm. The unique DSL programming language was embedded in the voltage protection module of the rotor side to achieve the protection function of Logic and action. Simulation result shows that the protection can meet the requirements of LVRT.
出处
《水电能源科学》
北大核心
2018年第2期208-212,共5页
Water Resources and Power
基金
中国能源建设集团科技项目(2016F006)
作者简介
王长虹（1988-），女，硕士研究生，研究方向为电力系统稳定与控制、新能源并网方式等，E—mail：2015223030019@stu．scu．edu．cn;通讯作者：刘天琪（1962-），女，教授、博导，研究方向为电力系统稳定与控制、高压直流输电、新能源并网方式，Email：tqliu@sohu．com
