CN205067676U - Can cascade modularization photovoltaic arc detection ware of extension - Google Patents

Abstract

Can cascade modularization photovoltaic arc detection ware of extension is the cascaded mode expand's of accessible a photovoltaic electric arc monitor. Constitute through cascaded photovoltaic arc detection ware module by one or more, every photovoltaic arc detection ware module two ports around by, port and port backward forward promptly, have on these two ports interconnected the power, refer to ground, serial ports data signal, the port also has address configuration output signal forward in addition, the port also has the address to dispose incoming signal backward. The beneficial effects of the utility model are that it uses only to need a photovoltaic electric arc sensor model just can cascade the photovoltaic of supporting different configurations of extension through the module of different quantity to during multiple modules, outside needs a port to connect, and every module has realized automatic address configuration, need not dial switch, wire jumper etc. And dispose, has made things convenient for the application.

Description

Can cascade expansion Modular photovoltaic arc detector

Technical field

The field of photovoltaic power generation that the invention belongs to is the photovoltaic electric arc monitor that a kind of mode by cascade carries out expanding.

Background technology

Along with the development of photovoltaic generation, especially distributed photovoltaic power generation is universal, proposes more and more higher requirement to the security of photovoltaic plant.Have numerous electric connection points in photovoltaic generating system, and the DC voltage of photovoltaic generating system is more and more higher, the highest beginning adopts 1500V now.If there is certain tie point to occur bad connection, just there will be phenomenon of arc discharge, and due to photovoltaic system be direct current, there is no zero crossing, thus this electric arc once burning be just not easy extinguish, serious harm can be caused.The lighter burns electrical equipment, and severe one causes fire.So, try every possible means, before electric arc does not also form disaster, circuit is cut off extinguish arcs.Photovoltaic arc-detection is exactly whether have electric arc in real-time detection photovoltaic DC system, once find electric arc, and the intensity of electric arc reaches certain level will send signal in time, goes operating switch line disconnection.

Photovoltaic arc detector is quite newer a kind of product demand, the photovoltaic arc detector that Vehicles Collected from Market occurs is all genuine a certain application scenarios exploitation, the number of channels all fixed, if photovoltaic application is different, port number demand is different, so just need the photovoltaic arc detector of different model, or become by the photovoltaic electric arc detector set that multiple number of channels is few.A kind of front method requires that the supplier of this product needs to develop according to demand the photovoltaic arc detector of multiple different number of channels.The current solution of a kind of rear method is also imperfect, subject matter is that each photovoltaic arc detector has independently electric arc and communication interface, and cause the system integration to get up complex structure, wire harness is many, and also can increase the cost of system, and increase the complexity of software development.

Summary of the invention

What the present invention proposed can the Modular photovoltaic arc detector of cascade expansion, achieve the photovoltaic application only covering different port number by a kind of photovoltaic electric arc detector models, and external interface only needs one, facilitates universal and system and applies.

The technical solution used in the present invention is: be made up of the photovoltaic electric arc detector module of one or more cascade, each photovoltaic electric arc detector module is by former and later two ports, i.e. port and backward port forward, these two ports there are the power supply, reference ground, the data signals of serial that interconnect, port also has address configuration to output signal forward in addition, and port also has address configuration input signal backward.Above-mentioned photovoltaic electric arc detector module according to the address of the information configuration of address configuration input signal oneself, and adjusts the output information of address configuration output signal according to the address of oneself; Port can be connected with the cable of outside forward, with can realize cascade expand inserting with the port backward of another photovoltaic photodetector module, when cascade, the address configuration output signal of adjacent photovoltaic electric arc detector module is connected with address configuration input signal.

The invention has the beneficial effects as follows: only need a kind of photovoltaic electric arc sensor model number just can carry out by the module of varying number the photovoltaic application that different configuration is supported in cascade expansion, and during multiple module, an outside only needs port connects, and each module achieves automatic address configuration, do not need to dial switch, wire jumper etc. to be configured, facilitate application.

Accompanying drawing explanation

This instructions has an accompanying drawing:

Fig. 1, can cascade expansion Modular photovoltaic arc detector.In figure, Figure 1A is by the situation example of three photovoltaic electric arc detector module application of the manystage cascade connections, and wherein 11,12 and 13 is three photovoltaic electric arc detector module, and 14 is the cables be connected with system; Figure 1B be one can the inner structure of photovoltaic electric arc detector module of cascade expansion, wherein 20 is ports backward, and 21 is ports forward, and 22 is main circuits of photovoltaic electric arc detector module.

Embodiment

With reference to figure 1.The oriented rear port 20 of each photovoltaic electric arc detector module and forward port 21; Forward port and port backward there is power supply VCC, with reference to ground GND, data signals of serial DATA, they are straight-through; Backward on port 20 except above-mentioned three through connect signals also have address configuration input signal ADD_IN, this signal comes main circuit from port 20 is enterprising backward; Forward on port 21 except above-mentioned three through connect signals, also have address configuration output signal ADD_OUT, this signal is that main circuit sends.

When system cascade is expanded, such as Figure 1A, system cable is connected with the port forward of photovoltaic electric arc detector module (13 in figure) foremost, and other photovoltaic electric arc detector module is directly connected slotting cascade with port backward by port forward.During cascade, VCC, GND, DATA, ADD_IN signal of VCC, GND, DATA, ADD_OUT of port and the port backward of adjacent block is to inserting forward.The address configuration ultimate principle of their cascades is such: each photovoltaic electric arc detector module constantly sends oneself address information by ADD_OUT signal; Each photovoltaic electric arc detector module constantly detects oneself ADD_IN signal, when this signal does not have information, illustrate that it is last in cascade string, so its address is just 1(or other values, according to convenient design when this is product design), when this signal has information, so the address of oneself is exactly that this information adds 1(or other similar agreements, designs as required when this is product design); Each photovoltaic electric arc detector module of such cascade knows the serial ports address of oneself.External system can be communicated with three photovoltaic electric arc detector module of this cascade by serial ports.

Claims (2)

1. can cascade expansion Modular photovoltaic arc detector, it is the photovoltaic electric arc monitor that a kind of mode by cascade carries out expanding, it is characterized in that being made up of the photovoltaic electric arc detector module of one or more cascade, each photovoltaic electric arc detector module is by former and later two ports, i.e. port and backward port forward, these two ports there are the power supply, reference ground, the data signals of serial that interconnect, port also has address configuration to output signal forward in addition, and port also has address configuration input signal backward.

2. described in claim 1 can cascade expansion Modular photovoltaic arc detector, it is characterized in that described photovoltaic electric arc detector module is according to the address of the information configuration of address configuration input signal oneself, and according to the output information that the address adjustment address configuration of oneself outputs signal; Port can be connected with the cable of outside forward, with can realize cascade expand inserting with the port backward of another photovoltaic photodetector module, when cascade, the address configuration output signal of adjacent photovoltaic electric arc detector module is connected with address configuration input signal.