A method for suppressing the starting current impact of a three-phase voltage type pwm rectifier
A technology of starting current and three-phase voltage, which is applied to electrical components, output power conversion devices, etc., can solve the problems of large starting current shock and starting current shock, and achieve the effect of suppressing current shock, improving reliability, and being easy to implement.
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[0028] In the present invention, the steady-state output voltage value of the DC side is 300V, the rated load is 30Ω, the rated capacity is 3kW, the peak value of the AC side voltage is 100V, and the given value of the outer ring voltage is u dc * The change curve of y=kx 2 Take k=3500000, Δt 1 =6.5ms, take the DC side capacitor current i c Time Δt as a given value for the reactive current loop 2 =4.5ms, for simulation verification.
[0029] figure 2 , Figure 4 and Figure 6 It is the waveform diagram of the original voltage and current double closed-loop control. image 3 , Figure 5 and Figure 7 It is a waveform diagram after adopting the control method of the present invention. Depend on figure 2 and image 3 It can be seen from the comparison that after adopting the control method of the present invention, the no-load start-up impulse current of the rectifier is reduced from 3 times of the original steady state current to 1.3 times of the steady state curre...
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