Output differential feedback based adaptive control method of virtual synchronizer
A virtual synchronous machine and self-adaptive control technology, applied in reactive power compensation, AC network voltage adjustment, single-network parallel feed arrangement, etc., can solve problems such as threats to power grid stability, power grid frequency exceeding, and system off-grid operation. Achieve the effect of avoiding repeated charging and discharging process, suppressing power overshoot, and speeding up the adjustment process
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[0041] The present invention will be described in detail below with reference to the drawings and specific embodiments.
[0042] Reference figure 1 The system structure of the present invention based on the adaptive control method of the virtual synchronous machine based on output differential feedback is to include a three-phase full-bridge inverter. The output of the three-phase full-bridge inverter is integrated into the power grid through the LC filter circuit and connected to the grid. A set of current sensors ( figure 1 CSa, CSb and CSc) and two sets of voltage sensors ( figure 1 In VSa, VSb and VSc and VSga, VSgb and VSgc); two sets of voltage sensors collect the three-phase voltage signal output by the inverter and the three-phase voltage signal of the power grid respectively, and obtain the corresponding digital data through the A / D module (analog-digital conversion circuit) Then connect the inverter output voltage amplitude calculation module and the grid voltage ampl...
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