Voltage stabilizing method and device for single phase DC-to-AC converter
A technology of single-phase inverter and voltage stabilization control, which is applied in control/regulation systems, instruments, and irreversible DC power input to AC power output, etc. The effect and other issues, to achieve the effect of high voltage regulation accuracy and fast dynamic response speed
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Specific embodiment one
[0031] Such as image 3 As shown, a single-phase inverter voltage stabilization control method includes the following steps:
[0032] Step 1: Obtain the actual output voltage modulus of the single-phase inverter. The specific operation is as follows: Collect the instantaneous value u of the output voltage of the single-phase inverter, and obtain the output voltage change rate u′ of the single-phase inverter, according to V act = u 2 + ( u ′ ω ) 2 Obtain the actual output voltage modulus of the single-phase inverter, where V act Is the actual output voltage modulus of the single-phase inverter, u is the instantaneous value of the output voltage of the single-phase in...
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Specific embodiment two
[0047] Such as Figure 6 As shown, the difference between this specific embodiment and the first embodiment is that the voltage instantaneous value adjustment is added. This specific implementation also includes the following steps:
[0048] Step 4: Obtain the instantaneous value of the given voltage of the single-phase inverter. The multiplier gives the voltage modulus value V mod The cosine value cos(ωt+ ) Is multiplied to get the instantaneous value of the given voltage v ref .
[0049] Step 5: Obtain the instantaneous voltage error according to the instantaneous value of the output voltage of the single-phase inverter and the instantaneous value of the given voltage. Use a subtractor to get the instantaneous value of the given voltage v ref Subtract from the actual instantaneous voltage u to get the instantaneous voltage error v err2 .
[0050] Step 6: According to the error v of the instantaneous voltage err2 Adjust to obtain the second adjustment amo...
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