Serial-parallel mixed type filtering and protecting device of passive power
A technology of power filtering and protection devices, applied in harmonic reduction devices, AC networks to reduce harmonics/ripples, etc., can solve the problems that the total system current cannot be reduced, it is difficult to achieve the filtering effect, and the total system current increases. Achieve significant energy-saving effect, good filtering effect, and eliminate low-order harmonics
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Embodiment 1
[0023] Such as figure 1 As shown, the series-parallel hybrid passive power filter and protection device of the present invention includes a first reactor L1, a first capacitor C1, a transformer T1, a first single-phase thyristor Q1, and a second single-phase thyristor Q2 , the first varistor Y1, the second varistor Y2, the current limiting reactor L0, the arrester B1, the second reactor L2, the second capacitor C2, the third reactor L3, the third capacitor C3 and the vacuum contactor K ; The first reactor L1 is connected in series with the first capacitor C1 transformed by the transformer T1 to form a series resonant circuit, and resonates at the power frequency, connected between the power supply and the load, and connected in parallel with the second and third resonant branches on the load side , the first single-phase thyristor Q1 and the second single-phase thyristor Q2 are connected in series with the current-limiting reactor L0 and connected to both ends of the first cap...
Embodiment 2
[0030] Such as figure 2 As shown, the series-parallel hybrid passive power filter and protection device of the present invention is basically the same as that of Embodiment 1, the difference is: the first reactor L1, the second reactor L2, the third reactor L3 and the impedance transformation The transformer T1, the first capacitor C1, the second capacitor C2, and the third capacitor C3 are all three-phase.
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