电网技术2016，Vol.40Issue(11)：3580-3585,6.DOI:10.13335/j.1000-3673.pst.2016.11.044
适用于风电接入系统的时域模型识别纵联保护新原理
Novel Pilot Protection Based on Time-Domain Model Identification for Wind Power Integration
摘要
Abstract
To adapt to fault characteristics of week infeed, rich harmonics and frequency deviation of wind power system, a novel pilot protection principle based onmodel recognition in time-domain is proposed in this paper. Differential voltage and current of two line terminals conform to capacitance model at external fault state, but do not conform at internal fault state. A correlation coefficient is defined to describe capacitance model. When the correlation coefficient is close to 1, the fault is external, otherwise is internal. Thus protection criterion is formed. Since the criterion is achieved in time-domain, the novel pilot protection is not impacted by faultcharacteristics of week infeed, large harmonic and frequency deviation of wind power system. Since full electrical quantities are adopted, the proposed scheme is free from unstable impedance influence of wind power system. PSCAD simulation of wind power integration verifies effectiveness of the proposed principle.关键词
风电系统/纵联保护/模型识别/时域/相关系数Key words
wind power system/pilot protection/model recognition/time-domain/correlation coefficient分类
信息技术与安全科学引用本文复制引用
宋国兵,王晨清,唐吉斯,王小波,郭润生..适用于风电接入系统的时域模型识别纵联保护新原理[J].电网技术,2016,40(11):3580-3585,6.基金项目
国家重点基础研究发展计划项目(973计划)(2012CB215105)。 （973计划）
