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中文摘要：
采用数字信号处理器（digital signal processor，DSP）设计了电压型三相并网逆变器。该逆变器中的DSP可检测电网中的5次谐波电流，其运行速度消除了检测延时对系统的影响，实现了对5次谐波的瞬时检测，同时DSP还可对检测信号进行处理，实现了对绝缘栅双极性晶体管的控制。有无谐波2种情况下的实验结果表明，该逆变器在将有功功率输入电网的同时可较好地抑制5次谐波，具有较好的稳定性与实用性。
英文摘要：
A three-phase voltage type line-connected inverter controlled by digital signal processor （DSP） is designed, in which the DSP is used to detect the 5th harmonics of power network and the running speed of DSP eliminates the influence of time delay caused by detection on system, so instantaneous detection of the 5th harmonics is realized; at the same time, DSP is used to process the signals detected, finally, the control of insulated gate bipolar transistor is implemented. Experimental results of both conditions that harmonics exist or do not exist show that the designed inverter is stable and practicable, and can restrain the 5th harmonics well while active power is input to power network.
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