| 摘要 |
<p>An electronic conversion circuit for photovoltaic plants, including, in series, a source of photovoltaic energy (10, 20, 30), a DC-DC PWM and high-frequency converter (11, 21, 31), a PWM and high frequency transformer (12, 22, 32), a rectifier block (13, 23, 33), filter (14, 24, 34) and a DC-AC converter (15, 25, 35), with which the source of photovoltaic energy (10, 20, 30) is connected; the DC-AC converter (15, 25, 35) is also connected with an AC electric power line or system (16, 26, 36) and/or with one or more users of the electric line (16, 26, 36) and the transformer (12, 22, 32) has, both at the primary and at the secondary circuit, at least two equal windings, wherein the equal windings of the primary circuit are connected in series or in parallel and at least one of the equal windings of the secondary circuit is selected by means of at least one first switching element or contact (S9) of a switching block (28).</p> |
