电力系统自动化Issue(10)：100-106,7.DOI:10.7500/AEPS201301163
利用模量模型识别的VSC-HVDC输电线路纵联保护新原理
A Novel Pilot Protection for VSC-HVDC Transmission Lines Using Modulus Model Identification
摘要
Abstract
In view of the complexity of the control system of voltage source converter based HVDC (VSC-HVDC),its insufficient fault tolerance ability,and low correct rate of line protection device,a novel pilot protection for VSC-HVDC transmission lines using the modulus model identification is proposed.According to this principle,the external fault is equivalent to a positive capacitance model,so the correlation coefficient between the differential current and differential voltage derivative is 1;while the internal fault is equivalent to a negative capacitance model,so the correlation coefficient between the differential current and differential voltage derivative is -1 .So the internal faults and the external faults can be distinguished by j udging whether the correlation coefficient is positive or negative.In practice,modules are used to reduce the interpole electromagnetic coupling disturbance in the VSC-HVDC bipolar system. Theoretical analysis and PSCAD simulation experiments show that the new principle,without compensating for transmission lines capacitor current,is simple,easy to implement,and is not affected by transition resistance and control characteristics,while capable of identifying internal faults and external faults reliably and rapidly.关键词
电压源换流器型高压直流/直流输电线路/模型识别/相关系数/纵联保护Key words
voltage source converter based HVDC (VSC-HVDC)/DC transmission lines/model identification/correlation coefficient/pilot protection引用本文复制引用
靳幸福,宋国兵,徐海洋,冉孟兵,汪冬辉,刘河清..利用模量模型识别的VSC-HVDC输电线路纵联保护新原理[J].电力系统自动化,2014,(10):100-106,7.基金项目
国家自然科学基金资助项目(51037005,51177128) （51037005,51177128）
教育部博士点基金资助项目(20110201110056)。 （20110201110056）
