ITFR20100016A1 - PHOTOVOLTAIC MICRO-GENERATOR IN ALTERNATING CURRENT - Google Patents

Description

"PHOTOVOLTAIC MICRO GENERATOR IN ALTERNAT CURRENT

SUMMARY

The present invention relates to a photovoltaic micro generator device in alternating current with a pure sine wave, hereinafter referred to as

"MICRO-GENERATOR".

More specifically, the MICRO-GENERATOR, due to its conformation, has characteristics such as to collect the parts that compose it in a very small space, for example Tav (A), favoring its installation on diversified areas. By supplying electrical energy in pure sine wave alternating current with low voltage values, it allows the application of the same in direct electrical connection on the national electricity grid.

STATE OF THE TECHNIQUE

The problems and needs relating to energy saving and the use of renewable sources, such as solar energy, are well known.

Currently the photovoltaic panels, hereinafter referred to as "panels", which generate electricity in direct current through solar radiation, are connected to them in a parallel series configuration providing voltage and current values suitable for the required needs. The direct current available at the output of the connection is converted into alternating current by converters called "inverters", suitably sized to the electrical quantities required by the panels.

What described above is defined as a "photovoltaic plant".

The evident voltage drop losses deriving from the values of voltages and currents in circulation together with the values of the electrical resistances and the length of the connection, force the designer of the system to provide for the installation of the panels in as small a space as possible, necessarily placing panels in close succession. To expand an already installed system, it is necessary to budget for the purchase of another string of panels and another, at least the replacement of the existing one with another suitably sized, all with very expensive costs.

Those mentioned are just some of the problems related to photovoltaic systems. The object of the invention is to directly supply electrical energy in alternating current with pure sine wave, in compliance with the regulations in force on the subject, constituting a single and independent generating unit enclosed in a space of reduced dimensions, Tav (A).

Since the MICRO-GENERATOR can be advantageously used to be installed on existing street lighting poles, it is able to make the most of the mechanical conformations of the poles, for example Tav (C), and use the existing power lines to transport the energy produced.

By installing the MICRO-GENERATOR on several poles of street lamps, which are part of the same electrical connection panel, a "photovoltaic system" is created with the following characteristics:

supplying alternating current energy, which can be used directly in parallel connection with other units installed to be fed into the national electricity grid, for example electrical block diagram Table (D), maintaining the

cable voltage within acceptable values, given that the current values circulating on each MICRO-GENERATOR are much lower than those of known photovoltaic systems and would not be higher than those detected in the lighting phase of the street lamps, which will be powered through the same connection cables, as I will illustrate later.

A possible expansion of the photovoltaic system, turns out to be extremely simple in its application with low purchase and maintenance costs, in fact it is sufficient to install other MICRO-GENERATOR by electrically connecting their terminals in parallel configuration with those already existing, in order to increase consequently the power values of the expanded system;

individually supplying alternating current electricity to power even inductive loads with powers not exceeding 350 watts, it can be easily transported.

In the application in spaces in which the poles of the street lamps are located, the invention offers a particular predisposition for the simplicity of multi-connection installation, using the same cables used to transport the electrical energy supply of the lamps of the street lamps. The electrical connection is carried out in the way in which the cables during the day are used to transport the electricity produced by the MICRO-GENERATOR, and in the evening, when there is no solar radiation, the same cables are used for transporting the energy from the national electricity grid for the lighting of street lamps, which is managed by the electronic control.

The MICRO-GENERATOR incorporates an electronic control inside it, for example Table (B) (4), used for the management of the switching on and off phases to which the lamp (7) of the street lamp is connected.

11 MICRO GENERATOR is characterized in the graph Table (A) by a photovoltaic panel generating direct current, of variable power, which also acts as a container (l), inside which is housed a micro-inverter (2) which has the task of converting the direct current supplied by the photovoltaic panel into alternating current, usable for domestic use and for direct input of electrical energy into alternating current in the national electricity grid, having the aforementioned alternating current, technical characteristics compatible with those described

in the regulations in force on the subject; a connector (3) used for the MICRO-GENERATOR input and output connections; an electronic control (4) used to manage the switching on and off phases of street lamp lamps; a panel cover or enclosure closing panel suitably perforated 5), used for the protection of the components making up the MICRO-GENERATOR. Table (C) shows in the graph an example of installation on a pole (9) for street lighting lamps (8), where the minimum bulk and the simple application of the invention can be seen.

An example of an electrical block diagram Table (B) illustrates in the connections the photovoltaic panel (l), the micro-inverter direct current - alternating current (2), the management control of the switching on and off phases of the lamp for street lamp (4), the lamp of the street lamp (7), and the connection with the national electricity grid! 6).

Table (D) also shows an example of block electrical connection of several MICRO-GENERATOR, which, as configured in a schematic representation, form a "Photovoltaic system".

Claims (10)

CLAIMS 1. PHOTOVOLTAIC MICRO-GENERATOR device, supplying alternating current with pure sine wave, in compliance with current regulations on the subject characterized by a single and independent unit of reduced dimensions, intended to be installed on positions such as street lighting poles, buildings , industrial warehouses, etc. ... and any other structure that can exploit electricity in alternating current, in a multiple and single connection configuration in the presence of a national electricity grid. 2. PHOTOVOLTAIC MICRO-GENERATOR device as claimed in appeal n ° 1, having an internal electronic control for the management of the lighting and turning off phases of the street lamp lamp. 3. PHOTOVOLTAIC MICRO-GENERATOR device as claimed in application no. example Table (C), and the connection to the national electricity grid. 4. PHOTOVOLTAIC MICRO-GENERATOR device as claimed in application no. 1 and 2, characterized by the fact that, having small dimensions, it can be transported anywhere. 5. PHOTOVOLTAIC MICRO-GENERATOR device as claimed in application n ° 1 and 2 characterized by the fact that it is constituted and represented in the graph Table (A) by a photovoltaic panel generating direct current, of variable power, which also acts as a container (1), inside which a micro-i is housed (2), a connector (3) used for the MICRO GENERATOR input and output connections and an electronic control (4) used for managing the switching on and off of street lamp lamps; the components making up the MICRO-GENERATOR are protected by a suitably perforated panel cover or enclosure closing panel (5). 6. PHOTOVOLTAIC MICRO-GENERATOR as claimed in the application n i and the characterized composes can have various electrical and mechanical technical characteristics. 7. PHOTOVOLTAIC MICRO-GENERATOR device as claimed in application no. . 8. PHOTOVOLTAIC MICRO-GENERATOR device as claimed in application no. to set up a photovoltaic system of various powers. 9. PHOTOVOLTAIC MICRO-GENERATOR device as claimed in application no. 1 and 2 characterized by the fact that it can have various shapes and sizes while maintaining small dimensions. 10. PHOTOVOLTAIC MICRO-GENERATOR device as claimed in appeal n ° 1 and 2, characterized by the fact that the electronic control for the management of the on and off keys of the street lamp lamp is constituted by an astronomical clock, or by a twilight switch.