DK201200152U3 - Solar system security system - Google Patents

Abstract

The invention relates to a switchgear system for a solar cell system comprising one or more solar panels connected via an inverter to the mains, where there is provided a switch for physically switching off the current between the inverter and the solar panel, where the switch is suitably remote controlled and the switch thereby comprises a signal receiver, and wherein a remote control with a transmitter is located at a given distance from the receiver.

Description

DK 2012 00152 U3

Solar system security system SCREENING AREA

The production relates to solar cell eggs. More specifically, the invention relates to safety systems for solar cell eggs. Solar cell systems are constructions consisting of one or more solar panels, also called photovoltaic cells, which produce electricity in single strings and possibly several strings. In the prior art, there are a number of disadvantages that require improvement.

BACKGROUND OF THE MAKING

There are several different types of sunflower eggs. Generally, photovoltaic elements are characterized by comprising a photosensitive panel which generates a current upon exposure to light. The prior art in this field is extensive and well described in the literature.

The function of such plants is generally satisfactory and through such plants contributes to green energy production. However, in some extreme situations, the existing plants are not fully satisfactory, as there is a safety risk in connection with, for example, fire extinguishing work.

There is thus a need for a solar cell egg which, in addition to satisfying the main task of producing electricity when a light effect occurs, also has an increased safety. The purpose of the production is thus to satisfy a security need in situations where existing solar cell eggs present a risk to man and equipment, such as rescuers and rescue equipment.

DK 2012 00152 U3

SUMMARY OF PRODUCTION

The object achieves this purpose by providing a switching system for 5 solar cells comprising one or more solar panels connected via an inverter to the mains, where there is provided in the switching system a switch for physically interrupting the current between the inverter and the solar panel.

This creates an opportunity to disconnect the power from the solar panels and thereby eliminate a potential danger of, for example, rescue crews and firefighters.

Advantageously, the switch is controlled by a relay which, on the basis of a control signal, breaks or closes the switch and thus the current. This makes it possible that one does not necessarily have to be physically at the location of the switch unit in order to disconnect the contact / power.

Advantageously, the switch can be controlled by input from alarm systems such as smoke detector, fire alarm, HPFI relay or the like.

In a preferred embodiment, the switch is remote controlled, the switch thereby comprising a signal receiver and a remote control having a transmitter located at a given distance from the receiver. This embodiment is particularly preferred since it ensures that without danger, for example in the event of fire, the current can be interrupted from a safe distance.

It is convenient when the transmitter of the remote control and the receiver unit / control unit receiver communicate with an AM signal containing the control signal for the relay. In this connection, the signal is encoded between transmitter and 30 receiver units to protect against malfunctions.

Preferably, the remote control comprises an emergency stop pressure which, upon activation, causes the sending of a control signal to the receiver and thereby via the receiver's connection to the relay activates the relay, thereby switching or closing the switch and thus the current from solar panels to inverter.

Advantageously, components in the switch unit are of a type that withstands 5 temperatures above 100 degrees Celsius, preferably above 150 degrees Celsius. In this way, the functionality is also ensured for a period of time after the occurrence of any fire.

Conveniently, the circuit breaker unit comprises a rechargeable battery and a charging circuit which continuously charges the battery, the circuit breaker of the circuit breaker receiving power from a conventional power source, for example, the normal 230 V supply of the housing. Alternatively, the charging circuit may be powered directly from the solar system, and thus be independent of normal power grid. In contrast, the remote control will normally have a normal 15 long-lasting battery as a power supply.

The invention will hereinafter be explained with reference to the techniques in which:

20 DRAWINGS

FIG. 1 schematically shows a solar system with a switch according to the invention; and FIG.2 schematically shows a wireless remote control unit for the switch shown in FIG. 25 1;

DESCRIPTION OF A PREFERRED EMBODIMENT

From FIG. 1 shows a solar cell system with a switching system according to the invention.

30 The switching system consists of two main components, a transmitter unit / remote control and a receiver unit / control unit. The photovoltaic system is shown schematically here by a single solar panel, where in a fully established system there will typically be several panels in a string, and in addition there may be several strings. The actual DK 2012 00152 U3 switch in the control unit is shown here as a switch that breaks the DC current from the panes. The switch is broken by receiving a control signal in a relay in the receiver unit / control unit. The control signal is sent from a transmitter unit / remote control, preferably located at a distance from the photovoltaic system, so that the switch can be operated without risk by, for example, a fire in the property where the photovoltaic system is set up. In addition, various safety devices are switched on in the system in the form of a rechargeable power supply, for example by short-term power failure, ίο By FIG. 2 shows a wireless remote control unit for the iFIG. 1. The remote control unit comprises an emergency stop pressure and a signal circuit which generates a control signal which, via a transmission circuit, preferably with an AM type signal, is sent to the receiver in the switch unit mounted in the immediate vicinity of the photovoltaic system. The remote control unit is provided with a voltage source, preferably a battery, with an adequate capacity to ensure a durable power supply, at least at least regular inspections. For example, inspections may be annual inspections.

Pressing the emergency stop pressure will, via the 20 control signal sent to the control unit, activate a relay which breaks the voltage from the panels. In the event of an interruption caused by an error signal or a test operation, the system can be reset, by two two presses of the emergency stop pressure. Normal operation is thus initiated after switching on the solar panels. The emergency stop pressure can be placed at a safe distance from the housing and the solar cell system, for example in a fuse box by the road, or in another enclosure for that purpose. A free screen to the receiver is preferred.

In addition to a control signal receiver and relay with associated contact, the control unit itself includes a power supply from the usual power supply of the house. In addition, a backup power supply has been established in the form of a rechargeable battery, which is continuously charged by an electricity-connected charging circuit. Thus, if the usual power source is interrupted, for example in the event of a fire, there is an independent power supply that ensures the functionality of the switchgear system for the solar system for an extended period of time. Up to 240 hours of independent operation, DK 2012 00152 U3 is foreseen. Furthermore, it is envisaged that control indicators are provided on the control box, for example a green diode which signals norma! operation and a red diode signaling disconnection of the photovoltaic system from the mains. A further indicator for active charge circuit control in the control box may be present. At least the electrical components located close to the solar panels are of a type functional at least 100 degrees Celsius, preferably more than 150 degrees Celsius. The box itself which encapsulates the controller is preferably made of a material that can withstand high temp., For example, epoxy that can withstand at least 250 degrees Celsius.

10

The system is thus usable as a single-pole emergency stop system for a single-stranded solar cell egg. Use as a far-fetched emergency stop system for multi-stranded solar cells is also an option. Thus, it may be an emergency stop system that operates several relays, each of which disconnects power circuits.

15 Furthermore, controlling the emergency shutdown system on the basis of other systems, such as smoke alarms, fire alarms, recovery systems and temperature sensors, is a major extension of the system. Remote control via telecommunication systems will be another option.

Claims (7)

A photovoltaic system switching system comprising one or more solar panels connected via an inverter to the mains, where there is provided in the switching system a switch for physically interrupting the current between the inverter and the solar panel. The switching system according to claim 1, wherein the switch is controlled by a relay which, on the basis of a control signal, breaks or closes the switch and hence the current. Switching system according to claim 1 or 2, wherein the switch is controlled by input from alarm systems such as smoke detector, fire alarm, HPFI relays or the like. 4. Switching system According to any one of the preceding claims, wherein the switch is remote controlled and the switch thereby comprises a signal receiver and wherein a remote control with a transmitter is located at a given distance from the receiver. The switching system according to claim 4, wherein the transmitter of the remote control and the receiver of the switching unit / control unit communicate with an AM signal containing the control signal for the relay. Switching system According to any one of claims 4 and 5, wherein the remote control comprises an emergency stop pressure which, upon activation, causes the sending of a control signal to the receiver and thereby via the receiver's connection to the relay activates the relay, thereby switching or closing the switch and thus the current from the solar panel. to inverter. Switching system according to any one of the preceding claims, wherein components of the switching unit are of a type that withstands temperatures above 100 degrees Celsius, preferably above 150 degrees Celsius. GB 2012 00152 U3 Switching system according to any one of the preceding claims, wherein the switching unit comprises a rechargeable battery and a charging circuit which continuously charges the battery, where the switching unit's charging circuit receives current from a normal power source, for example the normal 230 V supply of the housing. Switching system according to any one of the preceding claims, wherein the switching unit comprises a rechargeable battery and a charging circuit which continuously charges the battery, where the switching unit's charging circuit receives current directly from the photovoltaic system. DK 2012 00152 U3 o i <1 230VAC KksZetn.st powe? sr <* 7 £ '>> n% fe J Έ # £ C Μ g 1 i ϋ * Φ »► i 1 »tla: 4M B & ui s« ......... o | i £, sou O UJ c: .. § \ i 1 SS ·: υ »• S« g *> <£ fli 'ØS O ...... O IX, i DK 2012 00152 U3 CMdE Antessre Ά Λ οί tVci) ΛΝΤ-1 <0 ui c5 O s X st. • * eyi tit £ Λ v> ¥ s cc yj o z