电力系统保护与控制2012，Vol.40Issue(7)：78-83,6.
基于模型识别的VSC-HVDC直流输电线路方向元件
Directional element for VSC-HVDC transmission lines based on model identification
摘要
Abstract
As the impact of the large shunt capacitor on both terminals of the HVDC transmission lines in VSC-HVDC, the system impedance can be equivalent to shunt capacitor impedance in high frequency domain. According to this characteristic, a directional protective scheme based on model identification method for VSC-HVDC transmission lines is proposed. The scheme detects transmission line fault by comparing difference of the model error, inductance and capacitance calculated in two different models and the real values using time domain algorithm in high frequency band. The simulation results show that the method is not affected by fault type, fault location and transition resistance, and it can identify the fault reliably and rapidly in any condition. This work is supported by National Natural Science Foundation of China (No. 51037005 and No. 51177128).关键词
电压源换流器型直流输电/直流输电线路/方向元件/模型识别/最小二乘法Key words
VSC-HVDC/ HVDC transmission line/ directional element/ model identification/ least square method分类
信息技术与安全科学引用本文复制引用
宋国兵,蔡新雷,高淑萍,索南加乐,李德坤..基于模型识别的VSC-HVDC直流输电线路方向元件[J].电力系统保护与控制,2012,40(7):78-83,6.基金项目
国家自然科学基金项目(51037005,51177128) （51037005,51177128）
