| 摘要 |
An auxiliary photovoltaic plant for generating energy comprises: one or more generating modules (1) each connected, at output and by means of related inverter devices (2) for transformation of a current from direct to alternating type, to a power line (3) provided with means (4) for reversible connection to an existing electricity network (5) for supply to an end user (6). The auxiliary plant delivers a total power of modest entity, comparable to the power absorbed by domestic users. A control system (7) is connected, in output (8) and by means of a switch - disconnector (9), to the power line (3), and in input to an operator (17) of a comparator type (17). The operator - comparator (17) is equipped with a first comparison input (10) (reference) and a second input (11) directly proportional to the value of the power absorbed by the end user. The function of the above- mentioned operator - comparator is that of disconnecting the auxiliary plant in a case where the end user is not able to receive the energy generated, preventing introduction into a public grid. On the detection of the second input (11), where it is < to the first input (10), the switch- disconnector (9) or (28) is activated so as to disconnect, entirely or in part, the auxiliary plant from the power line (3) and from the electricity network (5) and, vice versa, on the detection of the second input, where it is≥ to the first input (10), the switch-disconnector (9) is activated so as to insert the auxiliary plant on the power line (3), thus providing entirely or in part the energy absorbed by the user (6) connected to the electricity network (5). |
