摘要
利用作者早先提出的一种开关函数正负半波分解的方法 ,分析了三级电压源逆变器直流侧电容电压在电网对称及不对称条件下 ,电容电压的变化与开关函数间的关系 ,并得出引起直流侧电容电压变化的根本原因是与开关函数基频同相位的偶次余弦电流分量。
The relation between the voltage of capacitors and the switching function of three-level voltage source inverter at DC side in symmetry and asymmetry power system is identified by using authors' former method to decompose the switching function into positive and negative half waveforms. It is concluded that the even-order cosine current components of the same phase with the fundamental component of the switching function are the premier reason causing the variations of capacitors' voltage of three-level voltage source inverter at DC side.
出处
《电力系统自动化》
EI
CSCD
北大核心
2001年第7期32-35,共4页
Automation of Electric Power Systems
关键词
开关函数
三级电压源逆变器
对称控制
直流侧电容电压
电力系统稳定性
Capacitors
DC power transmission
Electric currents
Electric potential
Electric power systems
Phase control
Switching functions
Waveform analysis
