Three-phase four-switch APF switching control method based on Lyapunov
A three-phase four-switch, control method technology, applied in active power filtering, AC network to reduce harmonics/ripple, reactive power adjustment/elimination/compensation and other directions, can solve the complex modulation process and affect filter compensation performance, increase the difficulty of control, etc.
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[0063] The invention is described in detail below in conjunction with accompanying drawing:
[0064] A three-phase four-switch APF switching control method based on Lyapunov, comprising the following steps:
[0065] Step 1: First, analyze the three-phase four-switch APF topology; establish the switching function and the state equation of the three-phase four-switch APF topology in the three-phase stationary coordinate system; write the state equation of the system under the command current, for the above two states The equation is subtracted to obtain the error state equation; the voltage output in the three-phase stationary coordinate system under different switching modes is transformed into the two-phase stationary coordinate system.
[0066] Step 2 is based on the controller designed by Lyapunov. On the basis of the coordinate transformation in step (1), the stability theorem is satisfied by analyzing the relationship between the error current and the angle between the err...
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