发明名称 |
Method and system for detecting a negative sequence for three phase grid-connected inverter systems |
摘要 |
A method and system for detecting the negative sequence of three phase grid-connected inverter systems utilizes, for example, computer hardware and/or computer software to remove a direct current component from a direct-axis current feedback for a three phase current of the inverter system to yield a pure alternating current waveform signal. A first low pass filter eliminates high frequency noise from the alternating current waveform signal while passing a negative sequence signal. The filtered signal is rectified to an absolute value, and a second low pass filter flattens the rectified signal to an output signal that is indicative of the magnitude of the negative sequence current.
|
申请公布号 |
US6583996(B2) |
申请公布日期 |
2003.06.24 |
申请号 |
US20010683060 |
申请日期 |
2001.11.14 |
申请人 |
BALLARD POWER SYSTEMS CORPORATION |
发明人 |
DENG DOUG;WANG KON-KING MIKE |
分类号 |
H02J3/01;(IPC1-7):H02M1/12;H02M1/14 |
主分类号 |
H02J3/01 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|