摘要
在实际应用中,换流器的触发角α和熄弧角γ经常由于各种原因偏离规定值,从而引起换流器交直流侧特征谐波幅值增大,危害电力系统装置和增大功率损耗。通过对换流器交直流侧电流和电压特征谐波方程线性化,利用模糊控制理论设计了调整换流器触发角α和熄弧角γ的模糊控制器,以减少整流侧5次和逆变侧6次特征谐波的幅值,从而控制了换流器交直流侧电流和电压特征谐波幅值。并且用电力系统仿真软件NETOMAC构造了一个两机—直流系统对该方法进行数字仿真,结果表明,该方法能够将电压和电流特征谐波幅值控制在比较理想的范围内。
In practical, the ignition angel and extinction angel of a converter often deviate the given value for various reasons,therefore this situation tends to result in the increase of characteristic harmonic magnitude in AC/DC of the converter and do great harms to the devices of power systems and increase the power consumption. In this paper, the harmonic equations of AC/DC sides are linearized and the fuzzy control theory is adopted to modify the ignition angel α and extinction angel γ in order to decrease the 5^(th) characteristic harmonics in rectifier side and the 6^(th) in inverter side. According to the NETOMAC simulation result, it shows that this method can actually control the characteristic harmonic magnitude of current and voltage within a certain boundary.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
2004年第4期90-94,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
国家自然科学基金资助项目(50377017)
关键词
模糊控制
触发角
熄弧角
特征谐波
换流器
fuzzy control
ignition angel
extinction angel
characteristic harmonics
converter
