电力系统自动化2016，Vol.40Issue(22)：111-117,7.DOI:10.7500/AEPS20151020007
考虑直流电流上升及交流电压下降速度的换相失败分析
Commutation Failure Analysis Considering DC Current Rise and AC Voltage Drop Speed
王峰 1刘天琪 1李兴源 1杨稼祥2
作者信息
- 1. 四川大学电气信息学院，四川省成都市 610065
- 2. 国网宁夏电力公司检修公司，宁夏回族自治区银川市 750000
- 折叠
摘要
Abstract
In view of the inadequacy of the present research on commutation failure merely focusing on voltage drop without considering the rise of DC current,a complete commutation failure analysis model with the operating parameters of rectifier side,inverter side,and DC transmission lines taken into account is developed based on the classical turn-off angle expression. According to the influence of AC voltage drop on the DC current rise,the model can decouple AC voltage and DC current to obtain a single relational expression between the turn-off angle and the commutation bus voltage.Then the critical commutation voltage value and the critical voltage drop speed causing commutation failure are derived based on the above model.The theoretical derivation of relations between the voltage drop speed and fault severity and reactive power compensation capacity is also carried out.It is found that the voltage nonlinearly drops faster with the fault severity.In some earlier commutation processes,the larger the voltage drop amplitude is,the more likely the commutation failure will be.The PSCAD/EMTDC simulation results prove the proposed method.关键词
高压直流输电/换相失败/直流电流/交流电压/影响因素/故障分析/机理分析Key words
high voltage direct current (HVDC) transmission/commutation failure/DC current/AC voltage/influencing factors/fault analysis/mechanism analysis引用本文复制引用
王峰,刘天琪,李兴源,杨稼祥..考虑直流电流上升及交流电压下降速度的换相失败分析[J].电力系统自动化,2016,40(22):111-117,7.
