Method for synchronously controlling parallel connection of three-phase inverter
A three-phase inverter and synchronous control technology, which is applied in the direction of converting irreversible DC power input into AC power output, can solve the problems of potential safety hazards, failure to realize carrier synchronization, high risk of single point failure, etc., and achieve parallelism Fewer interconnection lines, fast synchronization, and the effect of suppressing harmonic circulation
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[0022] Below in conjunction with accompanying drawing this patent is described in more detail:
[0023] The essence of the carrier counter is a high-frequency up-down counter, that is, the counter counts up from zero to the set maximum value, then counts down in the opposite direction to zero, and then automatically counts up again, so that it goes round and round, thus forming an isosceles triangle Counting waveform, the time corresponding to the equilateral length of each isosceles triangle is the counting period of the carrier counter.
[0024] The counting unit of each increment and decrement count of the carrier counter is 1, and the frequency of its increment and decrement counting should be significantly higher than the frequency of the triangular carrier wave of the inverter module, that is, to ensure that within one triangular carrier cycle of the inverter module, The counting cycles of the carrier counter need to include tens to tens of counts to ensure the accuracy ...
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