摘要
工程设计中单调谐滤波电容器额定容量与额定电压的选择存在盲目性。为充分利用滤波电容器额定容量增大带来的经济效益、更好地滤除谐波,文章推导出了单调谐滤波电容器额定容量与额定电压和谐波电流的关系式及其实用化变型公式,给出了以基波和各次谐波电压算术和为校验条件的电容器最低额定电压选择式,并结合算例给出了相应的滤波电容器参数。3条滤波支路并联构成的滤波器组的阻抗-频率特性表明了文中公式的正确性和合理性。
During engineering design there may exist blindness in the selection of rated capacity and rated voltage of single-tuned filter capacitor. To fully utilize the economic effect brought about by increasing rated capacity of filter capacitor and to filtrate harmonics better, the authors derive the relational expression among rated capacity of single-tuned filter capacitor with its rated current and harmonic currents as well as practicable formulae to determine rated parameters of the capacitor. Taking the arithmetic sum of fundamental harmonic and harmonic voltages as verification condition, a formula to select capacitor＇s lowest rated voltage is given. On the basis of calculation examples, corresponding parameters of the filter capacitor are proposed according to the proposed formulae. The impedance-frequency characteristics of a filter set constituted by three parallel filtering branches shows that the proposed formulae are correct and rational.
出处
《电网技术》
EI
CSCD
北大核心
2006年第20期52-55,共4页
Power System Technology
关键词
电网
电力滤波器
电容器
谐波
补偿
power network
power filter
capacitor
harmonics
compensation
