Photovoltaic confluence equipment

Abstract

The utility model discloses a photovoltaic confluence device, relates to the confluence field, and aims to solve the problem that abnormal heating can be caused due to increased impedance of a confluence loop when a wiring terminal of the photovoltaic confluence device is virtually connected, so that a controller and a temperature detection module are additionally arranged in a conventional photovoltaic confluence box. The first temperature value of the positive output end of the circuit breaker and the second temperature value of the negative output end of the circuit breaker in the confluence loop are monitored in real time through the temperature detection module, and when the first temperature value or the second temperature value is larger than a preset temperature threshold value, the controller will control the circuit breaker to be disconnected. Namely, the controller can timely control the circuit breaker to trip when the internal temperature of the photovoltaic confluence equipment is too high so as to protect the safety of internal devices of the photovoltaic confluence equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the confluence field, especially in a kind of photovoltaic confluence equipment. BACKGROUND

[0002] Current photovoltaic confluence box is only made data acquisition and upload function on the basis of monitoring device of confluence function, cannot actively protect, and fault problem needs maintenance personnel to maintain on site after uploading.But in the time of maintenance personnel arrives on site, the accident can have expanded to the state of needing to replace all components.For example, when the wiring terminal of photovoltaic confluence box is virtually connected, the impedance of photovoltaic module increases when virtually connected, which can cause abnormal heating, and long-term use can induce high temperature.Seriously, it can also cause fire.This situation is difficult to trigger overload and short-circuit protection of circuit breaker, and generally cannot cause automatic trip of circuit breaker, which often causes equipment to catch fire and burn. SUMMARY

[0003] The utility model discloses a kind of photovoltaic confluence equipment, and the controller and temperature detection module are additionally arranged in the inside of existing photovoltaic confluence box in the present application, the temperature value of photovoltaic confluence anode loop is monitored in real time by temperature detection module, when temperature value is greater than preset temperature threshold, controller can control circuit breaker to disconnect in time, i.e.

[0004] To solve the above technical problems, the utility model provides a kind of photovoltaic confluence equipment, comprising: N positive input interface, N negative input interface, N positive fuse, N negative fuse, temperature detection module, controller, circuit breaker, positive output interface, negative output interface, N is not less than 1 positive integer;

[0005] The first sampling end of the temperature detection module is connected with the positive output end of the circuit breaker, the second sampling end is connected with the negative output end of the circuit breaker, and the output end is connected with the temperature input end of the controller, for collecting the first temperature value of the positive output end of the circuit breaker and the second temperature value of the negative output end of the circuit breaker;

[0006] The positive input end of the controller is connected with each positive fuse, the negative input end is connected with each negative fuse, and the output end is connected with the control end of the circuit breaker, for controlling the circuit breaker to disconnect when the first temperature value or the second temperature value is greater than preset temperature threshold;

[0007] The positive output end of the circuit breaker is connected with the input end of the positive output interface, and the negative output end is connected with the input end of the negative output interface.

[0008] Optionally, the circuit breaker comprises a tripping coil and a release device.

[0009] The first end of the tripping coil is connected with the output end of the controller, and the second end is grounded, for receiving the electric signal transmitted by the controller when the first temperature value or the second temperature value is greater than a preset temperature threshold.

[0010] The positive input end of the release device is connected with each of the positive fuses, the negative input end is connected with each of the negative fuses, the positive output end is connected with the input end of the positive output interface, and the negative output end is connected with the input end of the negative output interface, for being disconnected when the tripping coil is powered.

[0011] Optionally, the circuit further comprises:

[0012] The input end of the positive bus bar is connected with each of the positive fuses, and the output end is connected with the positive input end of the controller and the positive input end of the circuit breaker;

[0013] The input end of the negative bus bar is connected with each of the negative fuses, and the output end is connected with the negative input end of the controller and the negative input end of the circuit breaker.

[0014] Optionally, the circuit further comprises:

[0015] The sampling end of the current sensor is connected with the output end of the positive bus bar, and the output end is connected with the current input end of the controller, for transmitting the total current signal of the output end of the positive bus bar collected to the controller.

[0016] Optionally, the circuit further comprises:

[0017] The sampling end of the positive voltage sensor is connected with the output end of the positive bus bar, and the output end is connected with the voltage positive input end of the controller, for transmitting the total positive voltage signal of the output end of the positive bus bar collected to the controller;

[0018] The sampling end of the negative voltage sensor is connected with the output end of the negative bus bar, and the output end is connected with the voltage negative input end of the controller, for transmitting the total negative voltage signal of the output end of the negative bus bar collected to the controller.

[0019] Optionally, the circuit further comprises:

[0020] The positive input end of the lightning arrester is connected with the positive power supply end of the controller, the negative input end is connected with the negative power supply end of the controller, and the grounding end is connected with the input end of the grounding interface.

[0021] The output end of the grounding interface is grounded.

[0022] Optionally, further comprising:

[0023] A communication module, an input end of the communication module is connected with a signal output end of the controller, a signal output end of a controller in the rest of the photovoltaic current collection device and an upper computer respectively, and an output end is connected with a signal input end of the control module.

[0024] Optionally, further comprising:

[0025] A unidirectional conduction module, an input end of the unidirectional conduction module is connected with each of the positive fuses respectively, and an output end is connected with a positive input end of the controller and a positive input end of the circuit breaker respectively.

[0026] Optionally, the unidirectional conduction module is a diode, an anode of the diode is the input end of the unidirectional conduction module, and a cathode of the diode is the output end of the unidirectional conduction module.

[0027] Optionally, further comprising:

[0028] A heat sink arranged at the bottom of the unidirectional conduction module.

[0029] The utility model discloses a photovoltaic current collection equipment, when finding that the terminal of photovoltaic current collection equipment is virtual, at this moment, because the impedance of current collection loop increases, will cause abnormal heating, so the scheme is arranged in the inside of current photovoltaic current collection box and is increased setting controller and temperature detection module, and the first temperature value of the positive output end of circuit breaker and the second temperature value of the negative output end of circuit breaker in current collection loop are monitored in real time through temperature detection module, when the first temperature value or the second temperature value is greater than preset temperature threshold, the controller will control circuit breaker to disconnect, namely the controller will control circuit breaker to trip in time when the temperature in photovoltaic current collection equipment is too high, to protect the safety of the internal device of photovoltaic current collection equipment. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the embodiment or prior art description needed to use the drawing briefly introduce, obviously, the drawing in the following description only is the embodiment of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to the provided drawing.

[0031] Figure 1 It is a structure schematic view of the photovoltaic current collection equipment provided by the utility model;

[0032] Figure 2 It is another structure schematic view of the photovoltaic current collection equipment provided by the utility model;

[0033] Figure 3 The utility model provides a control strategy schematic drawing of controller. DETAILED DESCRIPTION

[0034] The utility model discloses a photovoltaic confluence equipment, and the first temperature value of the positive output end of the circuit breaker in the confluence loop and the second temperature value of the negative output end of the circuit breaker are monitored in real time through the temperature detection module, when the first temperature value or the second temperature value is greater than the preset temperature threshold, the controller will control the circuit breaker to disconnect, that is, the controller will control the circuit breaker to trip in time when the internal temperature of the photovoltaic confluence equipment is too high, to protect the safety of the internal device of the photovoltaic confluence equipment.

[0035] In order to make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described clearly and completely in the following with reference to the drawings in the utility model embodiment, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor are within the protection scope of the utility model.

[0036] Please refer to Figure 1 , Figure 1 The utility model provides a photovoltaic confluence equipment's structure schematic drawing. This photovoltaic confluence equipment includes: N positive input interface 1, N negative input interface 2, N positive fuse 3, N negative fuse 4, temperature detection module 5, controller 6, circuit breaker 7, positive output interface 8, negative output interface 9, and N is not less than 1 positive integer;

[0037] The first sampling end of temperature detection module 5 is connected with the positive output end of circuit breaker 7, the second sampling end is connected with the negative output end of circuit breaker 7, and the output end is connected with the temperature input end of controller 6, to collect the first temperature value of the positive output end of circuit breaker 7 and the second temperature value of the negative output end of circuit breaker 7;

[0038] The positive input end of controller 6 is connected with each positive fuse 3 respectively, the negative input end is connected with each negative fuse 4 respectively, and the output end is connected with the control end of circuit breaker 7, to control circuit breaker 7 to disconnect when the first temperature value or the second temperature value is greater than the preset temperature threshold;

[0039] The positive output end of circuit breaker 7 is connected with the input end of positive output interface 8, and the negative output is connected with the input end of negative output interface 9.

[0040] In this invention, existing photovoltaic combiner boxes are equipped with N positive input interfaces 1, N negative input interfaces 2, N positive fuses 3, N negative fuses 4, a circuit breaker 7, a positive output interface 8, and a negative output interface 9. Positive input interfaces 1 and 2 are connected to the positive and negative output terminals of the photovoltaic module branch, respectively, while positive output interface 8 and negative output interface 9 are connected to the positive and negative input terminals of the load, respectively, forming a complete positive and negative combiner circuit. When an overvoltage or overcurrent occurs in the circuit, the corresponding positive fuse 3 and negative fuse 4 will trip to protect other components in the circuit. However, if a loose connection occurs at the photovoltaic combiner device's terminals, the circuit breaker will trip. Increased impedance in the combiner circuit can lead to abnormal heating, preventing the circuit from disconnecting properly. Prolonged use can induce high temperatures, potentially causing fires. Therefore, this solution includes a controller 6 and a temperature detection module 5. Furthermore, considering that the temperature of the positive and negative output terminals of the circuit breaker 7 will change rapidly when the terminals of the photovoltaic combiner device are loosely connected, this solution uses the temperature detection module 5 to monitor the first temperature value of the positive output terminal and the second temperature value of the negative output terminal of the circuit breaker 7 in real time. When either the first or second temperature value exceeds a preset temperature threshold, the controller 6 promptly controls the circuit breaker 7 to trip, thus protecting the safety of other components inside the photovoltaic combiner device.

[0041] It should be noted that the temperature detection module 5, controller 6, voltage sensor, and other devices can be integrated into a photovoltaic combiner monitoring and control device, such as... Figure 2 As shown, the actual information acquisition process of the photovoltaic combiner monitoring device is as follows: The current signal at the positive input port of the photovoltaic combiner equipment is acquired through the current sensor 12; the positive and negative voltage signals after the current is collected through the V+ and V- terminals of the photovoltaic combiner monitoring device, and the self-powered power supply is also taken from the built-in V+ and V- terminals; the status feedback signal of the circuit breaker 7 with shunt trip and status feedback contacts is acquired; the status signal of the surge arrester 15 with status remote signaling contacts is acquired; and the temperature signal (temperature detection module 5 is integrated within the photovoltaic combiner monitoring device) is acquired. The photovoltaic combiner monitoring device controls the shutdown process by providing an electrical signal to the shunt trip interface of the circuit breaker 7, and driving the tripping mechanism (tripper) of the circuit breaker 7 to complete the shutdown action.

[0042] It also needs to be explained that the photovoltaic current collection monitoring device of the application is automatically controlled by collecting temperature signals: when the temperature signal is transmitted to the CPU (Central Processing Unit, central processor) processor (controller 6) of the photovoltaic current collection monitoring device by the temperature collection device (temperature detection module 5) inside the photovoltaic current collection monitoring device, and the CPU processor judges that the temperature is an abnormal temperature, the CPU processor issues a command after processing, and the photovoltaic current collection monitoring device drives the power supply, the power supply is provided to the circuit breaker 7, and the drive of the split excitation tripping device is driven to make the circuit breaker 7 execute the opening operation, and the photovoltaic current collection equipment stops.

[0043] The embodiment provides a photovoltaic current collection equipment, when it is found that the wiring terminal of the photovoltaic current collection equipment is virtually connected, at this time, due to the increase of the impedance of the current collection loop, abnormal heating will be caused, therefore, the controller 6 and the temperature detection module 5 are arranged inside the existing photovoltaic current collection box, the first temperature value of the positive output end of the circuit breaker 7 and the second temperature value of the negative output end of the circuit breaker 7 in the current collection loop are monitored in real time by the temperature detection module 5, when the first temperature value or the second temperature value is greater than a preset temperature threshold, the controller 6 controls the circuit breaker 7 to be disconnected, that is, the controller 6 controls the circuit breaker 7 to trip in time when the temperature inside the photovoltaic current collection equipment is too high, so as to protect the safety of the internal devices of the photovoltaic current collection equipment.

[0044] On the basis of the above embodiment:

[0045] As an optional embodiment, the circuit breaker 7 comprises a tripping coil and a tripping device.

[0046] The first end of the tripping coil is connected with the output end of the controller 6, and the second end is grounded, for receiving the electric signal transmitted by the controller 6 when the first temperature value or the second temperature value is greater than a preset temperature threshold;

[0047] The positive input end of the tripping device is connected with each positive fuse 3 respectively, the negative input end is connected with each negative fuse 4 respectively, the positive output end is connected with the input end of the positive output interface 8, and the negative output end is connected with the input end of the negative output interface 9, for being disconnected when the tripping coil is powered.

[0048] In the utility model, because the function of the circuit breaker 7 is to close or shut off based on the control of the controller 6, the circuit breaker 7 with the tripping coil and the tripping device arranged inside is adopted, wherein the tripping coil can receive the electric signal transmitted by the controller 6 when the first temperature value or the second temperature value is greater than a preset temperature threshold, that is, the tripping coil is powered when the current collection loop appears high temperature, and then the tripping device is controlled to be disconnected, because the tripping device is connected with the fuse and the output interface respectively, so the tripping device is disconnected to ensure that the whole photovoltaic current collection equipment is powered off, and then the safety of the internal devices of the photovoltaic current collection equipment is protected.

[0049] As an optional embodiment, further comprising:

[0050] The positive bus bar 10 has an input end connected with each positive fuse 3 respectively, and has an output end connected with the positive input end of the controller 6 and the positive input end of the circuit breaker 7 respectively.

[0051] The negative bus bar 11 has an input end connected with each negative fuse 4 respectively, and has an output end connected with the negative input end of the controller 6 and the negative input end of the circuit breaker 7 respectively.

[0052] In the utility model, considering that the photovoltaic bus equipment needs to be connected with multiple photovoltaic component branches in actual application, the number of input interfaces and fuses is relatively large, and the port resources of the controller 6 are relatively limited, therefore, in order to save the port resources of the controller 6, the positive bus bar 10 and the negative bus bar 11 are additionally arranged, the multiple positive fuses 3 and the multiple negative fuses 4 are connected through the positive bus bar 10 and the negative bus bar 11 respectively, and the positive bus bar 10 and the negative bus bar 11 only need one output end to be connected to the controller 6, so that the interface resources of the controller 6 are greatly saved, and the wiring inside the photovoltaic bus equipment is also made more neat, and the space inside the photovoltaic bus equipment is saved.

[0053] As an optional embodiment, further comprising:

[0054] The current sensor 12 has a sampling end connected with the output end of the positive bus bar 10, and has an output end connected with the current input end of the controller 6, and is used for transmitting the total current signal of the output end of the positive bus bar 10 collected to the controller 6.

[0055] In the utility model, considering that if the current in the bus return circuit is a reverse current, at this time, the positive fuse 3 and the negative fuse 4 will not be disconnected, and the temperature collector will not collect the temperature value greater than the preset temperature threshold, that is, the reverse current condition cannot be detected in the existing photovoltaic bus equipment, therefore, the current sensor 12 is additionally arranged, the total current signal of the output end of the positive bus bar 10 is collected through the current sensor 12 and is sent to the controller 6, so that the controller 6 judges whether the reverse current condition exists in each bus return circuit according to the total current signal, if the reverse current condition exists, the controller 6 will immediately control the circuit breaker 7 to be turned off, and the reliability and safety of the scheme are improved.

[0056] It should be noted that the photovoltaic bus monitoring device of the present application can collect current signals and automatically control: the current sensor 12 transmits the current signal to the CPU processor of the photovoltaic bus monitoring device, when the CPU processor judges that the current is a reverse current, the CPU processor processes and issues a command, and the photovoltaic bus monitoring device gives a driving power supply, which is provided to the circuit breaker 7, and drives the split excitation tripping device to act, so that the circuit breaker 7 performs the opening operation, and the photovoltaic bus equipment stops.

[0057] As an optional embodiment, it also includes:

[0058] The positive electrode voltage sensor 13 is connected with the output end of the positive busbar 10 at the sampling end, and the output end is connected with the voltage positive input end of the controller 6, for transmitting the total positive electrode voltage signal collected from the output end of the positive busbar 10 to the controller 6.

[0059] The negative electrode voltage sensor 14 is connected with the output end of the negative busbar 11 at the sampling end, and the output end is connected with the voltage negative input end of the controller 6, for transmitting the total negative electrode voltage signal collected from the output end of the negative busbar 11 to the controller 6.

[0060] In the utility model, if the bus return circuit appears short circuit condition, at the moment, the positive electrode fuse 3 and the negative electrode fuse 4 will not disconnect, and the temperature collector will not collect the temperature value greater than the preset temperature threshold, and the controller 6 cannot accurately judge the short circuit condition only by the current signal collected by the current sensor 12, that is, when the existing photovoltaic bus equipment cannot detect the short circuit condition, the scheme increases the positive electrode voltage sensor 13 and the negative electrode voltage sensor 14, collects the total positive electrode voltage signal of the output end of the positive busbar 10 and the total negative electrode voltage signal of the output end of the negative busbar 11 through the positive electrode voltage sensor 13 and the negative electrode voltage sensor 14, and then the controller 6 can accurately judge whether the bus return circuit appears short circuit condition through the total current signal collected by the current sensor 12 and the total positive electrode voltage signal and the total negative electrode voltage signal collected by the positive electrode voltage sensor 13 and the negative electrode voltage sensor 14, and controls the circuit breaker 7 to disconnect in time when judging that the bus return circuit appears short circuit condition, improves the reliability and safety of the scheme.

[0061] It should be noted that the photovoltaic current monitoring monitoring device of the application can collect current signals, voltage signals and automatically control: the current sensor 12 transmits the current signal to the CPU processor of the photovoltaic current monitoring monitoring device, and the photovoltaic current monitoring monitoring device collects the voltage signal through the V+ and V- terminals and transmits it to the CPU processor. When the CPU processor judges that the short circuit condition occurs, the CPU processor processes and sends a command, and the photovoltaic current monitoring monitoring device gives a driving power supply, which is provided to the circuit breaker 7, and drives the shunt trip device to act, so that the circuit breaker 7 performs the opening operation, and the photovoltaic current device stops.

[0062] It should also be noted that the controller 6 in the present scheme adopts the control logic as shown in Figure 3 , and Figure 3 The five kinds of shutdown signals in the above formula adopt "or" logic, and only one kind of shutdown signal can make the photovoltaic current device stop. In order to meet the actual project use requirements, the threshold values of the three kinds of internal protection signals can be adjusted. For example, the temperature default 80 degrees Celsius is the over-temperature protection threshold value, and the protection is performed when the value is exceeded. At the same time, the three kinds of internal protection signals can be selected to be turned off or turned on. When an abnormality occurs in a photovoltaic string of the photovoltaic input, the current of this branch will decrease, and in severe cases, no power generation and charging will occur. At this time, the photovoltaic current device is in an abnormal condition, and the photovoltaic current device may be damaged. At this time, the current sensor 12 can collect the reverse current, and the controller 6 can perform logical judgment. When the photovoltaic system where the photovoltaic current device is located appears short circuit, the system voltage will abnormally decrease, and the system current will abnormally increase. At this time, logical judgment can be performed.

[0063] As an optional embodiment, it further comprises:

[0064] The positive input end of the lightning arrester 15 is connected with the positive power supply end of the controller 6, the negative input end is connected with the negative power supply end of the controller 6, and the grounding end is connected with the input end of the grounding interface 16;

[0065] The output end of the grounding interface 16 is grounded.

[0066] In the utility model, considering that the controller 6 is connected to the photovoltaic module branch through the positive fuse 3, the negative fuse 4, the positive input interface 1 and the negative input interface 2, and because most of the photovoltaic current systems are set outdoors, the photovoltaic current device is also often set outdoors. If it encounters thunderstorm weather, it is easy to be struck by lightning, and then the high transient voltage at the time of lightning will cause harm to the controller 6. Therefore, the present scheme increases the setting of the lightning arrester 15 and the grounding interface 16, and the lightning arrester 15 is arranged between the controller 6 and the ground wire, which can protect the controller 6 from the harm of high transient overvoltage at the time of lightning, and improves the safety of the scheme.

[0067] As an optional embodiment, it further comprises:

[0068] The input end of the communication module 17 is connected with the signal output end of the controller 6, the signal output end of the controller 6 in the remaining photovoltaic bus equipment and the host computer respectively, and the output end is connected with the signal input end of the control module.

[0069] In the utility model, considering that a photovoltaic power generation system generally includes multiple photovoltaic bus equipment, and the photovoltaic module branches connected by each photovoltaic bus equipment influence each other, so when the wiring terminal of any photovoltaic bus equipment appears virtual connection, the other photovoltaic bus equipment may still exist the condition of temperature being too high, so the scheme increases and sets the communication module 17, the communication network between the controllers 6 of the multiple photovoltaic bus equipment in the photovoltaic power generation system is constructed through the communication module 17, that is, any controller 6 can send the state signal of the photovoltaic bus equipment to the controller 6 in the other photovoltaic bus equipment, so that the remaining controller 6 can shut down the circuit breaker 7 according to the fault photovoltaic bus equipment, to guarantee the safety of the photovoltaic power generation system.In addition, considering that the actual demand of the user may change, for example: the user changes the power consumption required by the load, needs to disconnect the photovoltaic bus equipment in advance, at this time, the host computer can send the control signal to the communication module 17, and the communication module 17 transmits the control signal to the controller 6, that is, the communication between the host computer and the controller 6 is realized through the communication module 17, and then the host computer can disconnect the circuit breaker 7 through the controller 6 at any time according to the user's needs, that is, the circuit breaker 7 can be freely controlled to trip, and the practicability of the scheme is improved.

[0070] It should be noted that, in actual application, the communication module 17 can be a 485 communication module 17, a CAN (Controller Area Network) communication module 17 or other communication modules 17, which are not particularly limited in the application.

[0071] It should be further noted that the photovoltaic bus monitoring and monitoring device of the application can be manually controlled by an external control signal, that is, a monitoring software preinstalled in the background. The software provided by the photovoltaic bus monitoring and monitoring device can be installed on the background monitoring computer (host computer), and the 485 communication terminal (communication module 17) is connected with the background monitoring computer. The background monitoring computer displays the collected data, and when manual intervention is needed, the stop button can be clicked to transmit the signal to the CPU processor (controller 6) of the photovoltaic bus monitoring and monitoring device through the 485 communication, and after the CPU processor processes, the command is sent out, the driving power supply is given by the photovoltaic bus monitoring and monitoring device, the driving power supply is provided to the circuit breaker 7, and the separate excitation tripping device is driven to act, so that the circuit breaker 7 performs the opening operation, and the photovoltaic bus equipment stops.

[0072] It also needs to be explained that the photovoltaic current collection monitoring device of the application can be automatically controlled through the RS485 communication message of the external control signal: it can be automatically controlled through RS485 communication with the next level photovoltaic current collection equipment. When the lower photovoltaic current collection equipment detects a fault or abnormal condition that requires the photovoltaic current collection equipment to shut down, the signal is transmitted to the CPU processor of the photovoltaic current collection monitoring device through 485 communication message form, and the command is sent out after the CPU processor processes, and the photovoltaic current collection monitoring device drives the power supply, and the power supply is provided to the circuit breaker 7, and drives the split excitation tripping device to act, so that the circuit breaker 7 performs the opening operation, and the photovoltaic current collection equipment stops.

[0073] It also needs to be explained that the photovoltaic current collection equipment provided by the scheme has the following functions:

[0074] 1. When monitoring the data of the photovoltaic current collection equipment and uploading, further logical processing is performed to determine whether the equipment is abnormal;

[0075] 2. The internal protection signal processing can be set according to the project requirements to set the opening, closing and protection threshold;

[0076] 3. When the equipment is abnormal, the active tripping mode is adopted to protect the equipment, and the maintenance personnel is avoided to delay the processing,

[0077] 4. The abnormal conditions in the photovoltaic current collection equipment include but are not limited to temperature abnormality, photovoltaic module branch reverse current and short circuit. The controller 6 is responsible for monitoring these abnormal conditions, and the controller 6 has a logic processing and active protection function.

[0078] As an optional embodiment, it also includes:

[0079] The unidirectional conduction module 18 is connected with each positive fuse 3 respectively, and the output end is connected with the positive input end of the controller 6 and the positive input end of the circuit breaker 7.

[0080] In the utility model, if the current in the current collection loop is reverse current, at this time, the positive fuse 3 and the negative fuse 4 will not be disconnected, and the temperature collector will not collect the temperature value greater than the preset temperature threshold, that is, the reverse current condition cannot be detected in the existing photovoltaic current collection equipment, so the scheme increases the setting of the unidirectional conduction module 18, wherein the unidirectional conduction module 18 can ensure that the current in the positive current collection loop cannot flow in reverse, thereby ensuring that the reverse current will not appear in the current collection loop in the photovoltaic current collection equipment, and the reliability and safety of the scheme are ensured.

[0081] It needs to be explained that in actual application, the unidirectional conduction module 18 can be a diode or other device or module with unidirectional conduction capability, which is not particularly limited in the application.

[0082] As an optional embodiment, the unidirectional conduction module 18 is a diode, the anode of the diode is the input end of the unidirectional conduction module 18, and the cathode of the diode is the output end of the unidirectional conduction module 18.

[0083] In the utility model, considering that the positive unidirectional conduction module 18 and the negative unidirectional conduction module 18 all need to ensure that the current flows in the positive direction, and the diode has this function, in addition, the diode also has the advantages of small size and low cost, therefore, the scheme adopts the diode as the positive unidirectional conduction module 18 and the negative unidirectional conduction module 18.

[0084] It should be noted that, in actual application, when the unidirectional conduction module 18 is a diode, in order to ensure that the currents of all the bus return circuits cannot flow in the reverse direction, the number of diodes can be equal to the number of the positive fuses 3, which is N, or can be N / 2, N / 3, etc., as long as the output end of each positive fuse 3 is connected to the anode of the diode.

[0085] As an optional embodiment, the utility model also includes:

[0086] The heat sink 19 arranged at the bottom of the unidirectional conduction module 18.

[0087] In the utility model, considering that the unidirectional conduction module 18, for example, the diode, has a relatively high heat generation in actual work, which can easily affect the temperature of the positive and negative output ends of the circuit breaker 7, and further cause the first temperature value and the second temperature value measured by the temperature detection module 5 when performing temperature detection to be inaccurate, so that the actual circuit breaker 7 tripping control is inaccurate, therefore, the scheme sets the heat sink 19 at the bottom of the unidirectional conduction module 18, and eliminates the normal heat generation of the unidirectional conduction module 18 in actual work through the heat sink 19, so as to improve the accuracy of temperature detection and the accuracy of circuit breaker 7 tripping control.

[0088] It should be noted that, in the specification, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0089] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photovoltaic combiner device, characterized in that, The application relates to a circuit breaker, which comprises the following parts: N positive electrode input interfaces, N negative electrode input interfaces, N positive electrode fuses, N negative electrode fuses, a temperature detection module, a controller, a circuit breaker, a positive electrode output interface, a negative electrode output interface, and N is a positive integer not less than 1; a first sampling end of the temperature detection module is connected with a positive output end of the circuit breaker, a second sampling end is connected with a negative output end of the circuit breaker, and an output end is connected with a temperature input end of the controller, so as to collect a first temperature value of the positive output end of the circuit breaker and a second temperature value of the negative output end of the circuit breaker; positive input ends of the controller are connected with the positive electrode fuses respectively, negative input ends are connected with the negative electrode fuses respectively, and an output end is connected with a control end of the circuit breaker, so as to control the circuit breaker to be disconnected when the first temperature value or the second temperature value is greater than a preset temperature threshold value; a positive output end of the circuit breaker is connected with an input end of the positive electrode output interface, and a negative output end is connected with an input end of the negative electrode output interface.

2. The photovoltaic interconnection device of claim 1, wherein, The circuit breaker comprises a tripping coil and a tripping device; a first end of the tripping coil is connected with an output end of the controller, a second end is grounded, and the tripping coil is used for receiving an electric signal transmitted by the controller when the first temperature value or the second temperature value is greater than a preset temperature threshold value; positive input ends of the tripping device are connected with the positive electrode fuses respectively, negative input ends are connected with the negative electrode fuses respectively, a positive output end is connected with an input end of the positive electrode output interface, and a negative output end is connected with an input end of the negative electrode output interface, so as to be disconnected when the tripping coil is powered.

3. The photovoltaic interconnection device of claim 1, wherein, Further comprising: a positive electrode busbar, input ends of the positive electrode busbar are connected with the positive electrode fuses respectively, and output ends are connected with the positive input ends of the controller and the positive input ends of the circuit breaker; a negative electrode busbar, input ends of the negative electrode busbar are connected with the negative electrode fuses respectively, and output ends are connected with the negative input ends of the controller and the negative input ends of the circuit breaker.

4. The photovoltaic interconnection device of claim 3, wherein, Further comprising: a current sensor, a sampling end of the current sensor is connected with an output end of the positive electrode busbar, and an output end is connected with a current input end of the controller, so as to transmit a total current signal collected from the output end of the positive electrode busbar to the controller.

5. The photovoltaic current collection device of claim 3, wherein, Further comprising: a positive electrode voltage sensor, a sampling end of the positive electrode voltage sensor is connected with an output end of the positive electrode busbar, and an output end is connected with a positive voltage input end of the controller, so as to transmit a total positive electrode voltage signal collected from the output end of the positive electrode busbar to the controller; a negative electrode voltage sensor, a sampling end of the negative electrode voltage sensor is connected with an output end of the negative electrode busbar, and an output end is connected with a negative voltage input end of the controller, so as to transmit a total negative electrode voltage signal collected from the output end of the negative electrode busbar to the controller.

6. The photovoltaic current collection apparatus of claim 1, wherein, Further comprising: a lightning arrester, positive input ends of the lightning arrester are connected with positive power supply ends of the controller, negative input ends are connected with negative power supply ends of the controller, and a grounding end is connected with an input end of a grounding interface; an output end of the grounding interface is grounded.

7. The photovoltaic current collection device of claim 1, wherein, Further comprising: A communication module, an input end of the communication module is connected with a signal output end of the controller, a signal output end of a controller in the rest of the photovoltaic bus equipment and a host computer respectively, and an output end is connected with a signal input end of the controller.

8. The photovoltaic current collection device of any one of claims 1 to 7, wherein, Further comprising: A unidirectional conduction module, an input end of the unidirectional conduction module is connected with each of the positive fuses respectively, and an output end is connected with a positive input end of the controller and a positive input end of the circuit breaker respectively.

9. The photovoltaic current collection device of claim 8, wherein, The unidirectional conduction module is a diode, an anode of the diode is the input end of the unidirectional conduction module, and a cathode of the diode is the output end of the unidirectional conduction module.

10. The photovoltaic interconnection device of claim 8, wherein, Further comprising: A heat sink arranged at a bottom of the unidirectional conduction module.

Images