KR102009296B1 - Photovoltaic Connector Band with Non-Contacting Current Sensing Module - Google Patents

Abstract

The present invention relates to a photovoltaic connection board having a non-contact current sensing module, which is capable of preventing a fire. The photovoltaic connection board comprises: an enclosure (10) having a sealed structure; a relay (32) installed on an inner wall of the enclosure (10); a plurality of non-contact current sensing modules (33) having a 4-channel penetration part (333); a circuit breaker (35) capable of being turned on/off; and a bus bar (34) inputting supplied electricity to the circuit breaker.

Description

Photovoltaic Connector Band with Non-Contacting Current Sensing Module}

The present invention relates to a solar panel having a non-contact current sensing module, and more particularly, using a plurality of non-contact current sensing module to sense the current input through a plurality of cables and a plurality of cables connected to the breaker booth By connecting directly to the bar and omitting the PCB, it is possible to prevent the fire caused by cracking of the soldering part of the PCB, and the non-contact current sensing module is capable of wireless communication with the outside and a plurality of slaves connected in series to the master module. It is a solar connection panel equipped with a non-contact current sensing module that can be made of a module and omission of the plate and MUX-com, and the enclosure is formed in a completely sealed type to block the inflow of moisture and the like.

The photovoltaic device converts and collects light energy incident from the sun into electrical energy, stores the collected electrical energy, and converts the electrical energy converted into direct current at the collection stage into alternating energy to be input to a transformer. In such a photovoltaic device, a plurality of light collecting plates for collecting incident sunlight are generally installed.

On the other hand, such a photovoltaic device may generate unexpected voltage or current due to electronic shock, etc., thereby causing a problem of damage to the circuit. In order to prevent such a problem, the photovoltaic device has a photovoltaic connection panel equipped with various protection devices.

In general, the solar connection panel is installed between the photovoltaic device and the central control unit, and includes a reverse voltage prevention module, a current sensing module, an overcurrent protection fuse, and the like.

At this time, the reverse voltage prevention module provided in the solar connection panel is formed of a reverse voltage prevention diode for blocking the current flowing in the reverse direction to protect the circuit of the input terminal. In addition, the current sensing module detects the power voltage and current generated through the solar panel so as to monitor whether the power generation state is normal, and the current from the wirings via the solar connection panel during the solar power generation time. Detect it. In addition, the overcurrent protection fuse has a function of protecting the circuit by cutting off the overcurrent.

Such a conventional solar current sensing module for a solar panel has a problem that it is impossible to monitor the state of the solar power generation, because most of the current sensing module is configured in an analog method, the detection accuracy is lowered when the current is detected for a long time.

In addition, the conventional solar current panel current sensing module has a weak binding force between the devices provided therein for current sensing to generate an error in the current sensing and weak durability.

Accordingly, a current sensing module for a solar panel has been applied to maintain the detection accuracy even when the current is detected for a long time to accurately and stably monitor the solar power generation state in a contactless manner.

As shown in FIG. 1, the current sensing module 10 of the pre-applied invention has a case 11 having a plurality of through holes 15 through which wiring passes, and the case 11 for communication with another current sensing module. ) And an operation unit 16 provided on one side of the case 11 for setting a mode of a circuit board provided in the case 10. Inside and outside the case 10 is made of a structure provided with a variety of fixing and binding structure.

In the above-described current sensing module of the present invention, as shown in FIG. 2, when a current of DC 0 to 15A is applied to a wire passing through the through hole 15, a hall sensor provided therein detects the voltage After converting the value into a digital value through the A / D converter, and transmitting the data corresponding to the current value input from the microcomputer to the MUX-COM through communication, the current information of the corresponding wire is displayed in the MUX-. It is displayed on the display window of COM.

The above-described application of the invention has the advantage of preventing the occurrence of errors by increasing the position fixing force and binding force of the devices provided therein to increase the durability and stability when sensing the current.

However, the above-described prior invention has a problem in that the inner plate is provided with the inner plate for MUX-com and its installation is complicated, and a transparent window must be installed in the door to form the enclosure in a sealed structure.

In addition, a conventional solar panel is connected to a plurality of current sensing sensors and voltage sensing sensors provided on a PCB, respectively, to sense current and voltage of each cable. Accordingly, when a crack occurs in the soldering part connecting the circuit and cable of the PCB, a spark is generated around the cracked part, and there is a high risk of a fire, and when the PCB is damaged and an error occurs, it is composed of 8 to 12 channels. There is a problem that the entire PCB must be replaced.

Meanwhile, as a result of examining the prior art related to the present invention, a number of patent documents have been searched, and some of them are introduced as follows.

Patent Document 1 discloses that the average current value calculated on the basis of the current value of the entire string formed by the connection of the solar cell module detected by the current sensor by the solar cell connection panel device for solar power generation reaches the maximum average current value on the set day. When the set time has elapsed from a point in time, if the average current value calculated based on the current value of the entire string detected by the current sensor is less than or equal to the set reference current value, the current value detected at that point in time is determined for each string. Recognizing the offset value of the current sensor to perform the process of correcting the offset of the current sensor, by accurately reporting the power generation status of the solar cell to provide users with accurate information on the development status of the photovoltaic power generation system A solar cell connection panel device and a current sensor offset correction method thereof are disclosed.

Patent Literature 2 has a first case in which first through holes through which a plurality of wires through which current flows are formed, are defined, and each first through hole is defined and has a first boss formed along the through direction of the respective wires. ; Second through holes through which the wires passing through the first through holes are formed are formed, and each of the second through holes defines a second through hole and has a second boss disposed coaxially with the first boss of the first case. A second case coupled to the first case to form an accommodation space together with the first case; The magnetic material is arranged in such a manner as to surround any one of the first boss and the second boss that each wire penetrates so as to generate a magnetic field in each wiring, and an arrangement groove is formed in which a sensor is accommodated in a predetermined section along the circumferential direction. ; A circuit board disposed in the accommodation space formed by the first case and the second case, the circuit board having components for transmitting a signal sensed by the sensor to the outside; And mounted on a circuit board and accommodated in an exposure hole formed in any one of the first case and the second case so as not to interfere with the coupling between the first case and the second case, and the first case and the second case mutually. Disclosed is a current sensing module for a solar panel including a; connecting terminal connected to the external communication cable by being exposed to the outside through the exposure port in the coupled state.

KR 10-2012-0038067 A KR 10-1833176 B1

The present invention is to solve the above problems of the prior art, a plurality of cables are connected to the busbar through the non-contact current sensing module of the four-channel structure so that the PCB can be omitted by the fire caused by the failure of the soldering site. The purpose of the present invention is to provide a solar connection panel equipped with a non-contact current sensing module that can prevent and reduce the cost of PCB replacement.

In addition, according to the solar connection panel provided with a non-contact current sensing module of the present invention, the non-contact current sensing module is connected to the structure of the master-slave, and the master module is connected to the external control device wirelessly to control the external The purpose of this is to allow the current value to be checked through the device so that the MUX-com and the plate can be removed and the enclosure can be formed in a completely sealed structure.

Solar connection panel provided with a non-contact current sensing module of the present invention, the door is provided on the front and the enclosure made of a closed structure; A relay which is connected to each of two cables, one end of which is connected to the photovoltaic device, installed on an inner wall of the enclosure; A plurality of non-contact current sensing modules having a current sensing sensor provided therein for detecting a current of the cable in a non-contact manner and having four channel through portions to allow the cable connected to the relay to pass therethrough; A circuit breaker capable of outputting power supplied through the cable to the outside and enabling on / off; And a bus bar connecting the cable passing through the non-contact current sensing module and the breaker so that electricity supplied through each cable is input to the breaker.

The non-contact current sensing module is provided with a four-channel through portion through which the cable passes, and a current sensing sensor for sensing the current flow of the cable, and a plurality of slave modules connected in series through a communication cable, an external router and a wireless device. It is provided with a transmission and reception module for communication is connected to one of the slave module is divided into a master module for transmitting current related information of the cable passing through each slave module to the router,

A heat generating unit including a diode is installed on the upper inner surface of the enclosure, and a heat sink for dissipating heat inside the enclosure is installed on the upper surface of the enclosure.

In addition, according to the solar connection panel provided with a non-contact current sensing module of the present invention, a bus bar cover is further provided for protection of the bus bar.

In addition, according to the solar connection panel provided with a non-contact current sensing module of the present invention, it is characterized by setting the address of each slave module using the router.

The solar connection panel provided with the non-contact current sensing module of the present invention detects the current flowing through a plurality of cables through the non-contact current sensing module provided with the current sensing sensor, and the current sensing sensor as each cable is directly connected to the busbar. And it is possible to omit the PCB, the voltage sensor is installed, there is an effect that can prevent the occurrence of connection panel fire due to breakage of the soldering portion of the PCB and poor contact.

In addition, when an error occurs in a specific channel of the non-contact current sensing module, it is possible to solve the problem by simply replacing only the non-contact current sensing module including the corresponding channel. This has the effect of minimizing the cost and time lost of having to replace the entire PCB.

In addition, it is possible to check the current value of each cable through wireless communication between the contactless current sensing module consisting of the master-slave structure and the router, simplifying the structure by eliminating the MUX-com and the inner plate, and completely enclosing the enclosure. There is an effect that can be configured as.

In addition, since the heat generating portion is installed inside the upper surface of the enclosure and the heat dissipation plate is installed on the upper surface of the enclosure, heat inside the enclosure may be smoothly discharged, thereby preventing an excessive increase in the internal temperature of the hermetic enclosure.

In addition, as the busbar cover is installed on the busbar to which the plurality of cables are connected and connected to the breaker, the connection between the cable and the busbar is safely protected and the internal aesthetics are improved.

1 is a perspective view showing a conventional current sensing module for a solar panel.
2 is a reference diagram showing a data processing form of a conventional current sensing module for a solar panel.
Figure 3 is an external perspective view of a solar panel with a non-contact current sensing module according to the present invention.
Figure 4 is a block diagram showing the interior of the solar panel with a non-contact current sensing module according to the present invention.
5 is a schematic view showing a master-slave structure of a non-contact current sensing module according to the present invention.
6 is an external perspective view of a non-contact current sensing module according to the present invention.
Figure 7 is a block diagram showing the inner upper side of the solar panel with a non-contact current sensing module according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described with respect to the solar connection panel provided with a non-contact current sensing module of the present invention.

3 is an external perspective view of a solar panel having a non-contact current sensing module according to the present invention for explaining a preferred embodiment of the present invention, Figure 4 is a solar connection with a non-contact current sensing module according to the present invention 5 is a schematic diagram showing a master-slave structure of a non-contact current sensing module according to the present invention, FIG. 6 is an external perspective view of the non-contact current sensing module according to the present invention, and FIG. Fig. 1 shows the internal upper side of the solar connection panel provided with the non-contact current sensing module according to the present invention.

Solar connection panel provided with a non-contact current sensing module according to the present invention, as shown in Figure 3 to 7, the door 15 is provided on the front and the enclosure 10 made of a closed structure; A heat dissipation plate 20 which is installed in close contact with an upper surface of the enclosure 10 so as to release heat inside the enclosure 10 formed in a sealed state; A relay 32 having one end of the cable 31 connected to a photovoltaic device (not shown) and installed on an inner wall of the enclosure 10; A current sensing sensor (not shown) is provided therein to detect a current of the cable 31 in a non-contact manner, and a plurality of through-holes 333 of four channels are provided to allow the cable 31 connected to the relay 32 to pass therethrough. Non-contact current sensing modules 33; A circuit breaker 35 for outputting power supplied through the cable 31 to the outside and enabling on / off; Bus bar 34 for connecting the cable 31 passed through the non-contact current sensing module 33 and the breaker 35 so that the electricity supplied through each cable 31 is input to the breaker 35 and ; A connection panel controller 36 installed at a lower side of the enclosure 10 for power supply and control; And a heating unit 37 including a diode installed on an upper inner side surface of the enclosure 10.

Here, as shown in FIG. 5, the non-contact current sensing module 33 includes four channel through portions 333 through which the cables 31 pass, respectively, and detects a current flow of the cable 31. A sensing sensor is provided and includes a plurality of slave modules 33b connected in series through a communication cable 33c and a transmission / reception module for wireless communication with an external router 50 and communicates with one of the slave modules 33b. It is preferable to be divided into a master module 33a connected to a cable 33c and transmitting current related information of the cable 31 passing through each slave module 33b to the router 50.

Accordingly, the current information of the plurality of cables 31 passing through the plurality of slave modules 33b through the master module 33a may be collected and then wirelessly transmitted to the external router 50 for checking. do. Therefore, since the plate for MUX-COM and its installation is not necessary, the size of the enclosure 10 may be reduced, and the enclosure 10 may be enclosed to protect the internal parts safely.

In addition, as shown in FIG. 6, the non-contact current sensing module 33 includes a through part 333 through which a plurality of cables 31 through which current flows, and a boss 332 on the inner side thereof. A first case 331a, a second case 331b which is formed to be symmetrical with the first case 331a so as to form an accommodation space therein, is coupled to the first case 331a, and the first case 331a. And a circuit board (not shown) disposed in a receiving space formed by the second case 331b and mounted with components for transmitting a signal sensed by the current sensing sensor to the outside, and the first case 331a; And a connection terminal 335 provided in any one of the second cases 331b so that the communication cable 33c for communication connection can be connected.

In addition, a plurality of LEDs 336 electrically connected to the circuit board may be provided to display whether or not current flows through the cables 31 passing through the through part 333. In this case, the LED 336 is preferably disposed in the operation space 334 formed on the upper edge of any one of the first case 331a and the second case 331b.

In addition, the non-contact current sensing module 33 forming the slave module 33b is provided with a pushbutton switch 337 electrically connected to a circuit board to set an address of each slave module 33b. At this time, the push button switch 337 is also preferably disposed in the operation space 334. Accordingly, when setting the mode of the master module 33a by using the router 50 to be described later, communication with the router 50 is performed by pressing the pushbutton switch 337 provided in the specific slave module 33b. By doing so, the address of the slave module 33b can be set by the router 50. The router 50 may set an address or automatically assign an unused address through communication with a storage unit mounted on a circuit board of each slave module 33b.

In this case, as shown in FIG. 7 to protect the bus bar 34, a bus bar cover 34 ′ having a shape surrounding the bus bar 34 may be further installed. Therefore, the bus bar 34 is not exposed to the outside, of course, it is possible to securely protect the connection portion of the cable 31 and the bus bar 34.

The solar connection panel provided with the non-contact current sensing module of the present invention configured as described above detects the current flowing through the cable through the current sensing sensor of the non-contact current sensing module and detects the current as the cable is directly connected to the busbar connected to the breaker. The PCB on which the sensor and the like are installed can be omitted.

Therefore, it is possible to greatly reduce the risk of fire in the connection panel caused by cracking or poor contact of the soldering part of the PCB, and in case of abnormality in some of the channels to which the cable is connected, replace only the non-contact current sensing module provided with four channels. This significantly reduces the replacement cost and time compared to the prior art, which requires the entire PCB to be replaced.

In addition, among a plurality of slave modules among the non-contact current sensing modules consisting of a master module and a slave module, current information of each channel of the cable passing through each slave module is collected, and then transmitted to the master module through a communication cable. By transmitting the channel current information of each slave module to the router through wireless communication with the router, the router can check and monitor the channel current information of each slave module.

Therefore, there is no need to install a device such as MUX-COM that performs the master function inside the enclosure of the connection board, and the cable connecting the current sensing module and the MUX-COM and the board for installing the MUX-COM can be omitted. As a result, the enclosure size of the connection board is greatly reduced.

In addition, the heat generating parts in the connection panel such as diodes are arranged on the upper inner surface of the enclosure to form a heat generating portion, and by installing a heat sink on the upper surface of the enclosure, the heat inside the enclosure is quickly discharged to prevent overheating and the enclosure is completely sealed. It can be configured as.

As described above and described with reference to some embodiments for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as described above, the description of the invention and the claims Those skilled in the art will appreciate that many changes and modifications can be made to the invention without departing from the scope of the invention. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

10 ... enclosure
15 ... door
20 ... heat sink
31.Cable
32.Relay
33 ... Non-contact current sensing module
33a ... master module
33b ... slave module
33c ... communication cable
331a ... case 1
331b ... Second Case
332 Boss
333 ... through
334 ... operating space
335 ... connection terminal
336 ... LED
337 ... pushbutton switch
34.Busbar
34 '... booth bar cover
35 ... breaker
36.Control panel connection
37.Heating part

Claims (3)

And the door 15 is provided on the front and the enclosure 10 made of a closed structure;
A relay 32 having one end connected to each of the cables 31 connected to the photovoltaic device and installed on an inner wall of the enclosure 10;
A current sensing sensor is provided therein to sense a current of the cable 31 in a non-contact manner, and a plurality of non-contact current sensing units having four channel through portions 333 through which the cable 31 connected to the relay 32 passes. A module 33;
A circuit breaker 35 for outputting power supplied through the cable 31 to the outside and enabling on / off;
And a bus bar 34 connecting the cable 31 passing through the non-contact current sensing module 33 and the breaker 35 so that electricity supplied through each cable 31 is input to the breaker. ,
The non-contact current sensing module 33 is provided with a four-channel through portion 333 through which the cable 31 passes, and a current sensing sensor for sensing the current flow of the cable 31 is provided with a communication cable 33c. A plurality of slave modules (33b) connected in series through the through, and the external router 50 and the transceiver module for wireless communication and is connected to one of the slave module (33b) with a communication cable (33c) each slave module It is divided into a master module 33a which transmits current related information of the cable 31 passing through the cable 33b to the router 50, and passes through a plurality of slave modules 33b through the master module 33a. After collecting the current information of the plurality of cables 31 to be transmitted to the router 50 to the outside wirelessly to check,
A heat generating unit 37 including a diode is installed on an upper inner surface of the enclosure 10, and a heat sink 20 for dissipating heat inside the enclosure 10 is installed on the upper surface of the enclosure 10. ,
Busbar cover 34 ′ of enclosing the busbar 34 to prevent the busbar 34 from being exposed to the outside and to securely protect the connection portion of the cable 31 and the busbar 34. Solar connection panel with a non-contact current sensing module, characterized in that is further installed. delete The method of claim 1,
Solar connection panel with a non-contact current sensing module, characterized in that for setting the address of each slave module (33b) using the router (50).

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