CN201956938U - Photovoltaic array confluence box - Google Patents

Abstract

The utility model relates to the field of solar energy utilization, in particular to a confluence device used for connecting the photovoltaic array and an inverter. The utility model adopts the following technical scheme: a photovoltaic array confluence box comprises a box body and a circuit connecting module arranged in the box body, and is characterized in that the circuit connecting module comprises at least a set of positive input ends and negative input ends identical to the positive input ends in number, the positive pole of each current at the positive pole input end of each set or the negative pole of each current at the negative input end of each set is correspondingly and electrically connected with a positive pole fuse and a current detection circuit unit or a negative fuse and a current detection circuit unit, and the collected signal is transmitted to a detection plate through the current detection circuit unit. The photovoltaic array confluence box overcomes the defects in the prior art, and has the advantages of modularization, intelligence, expandability and low cost.

Description

The photovoltaic array header box

Technical field

The utility model relates to a kind of Application of Solar Energy field, is specifically related to be used for the collector-shoe gear that is connected between photovoltaic array and the inverter.

Background technology

In photovoltaic generating system, in order to reduce the connecting line between photovoltaic array and the inverter, the stability and the reliability of the operation of raising system, make things convenient for engineering maintenance, generally, need between photovoltaic group string, conflux, so that demultiplex is converged into one tunnel output.Common header box can be divided into two classes substantially at present: band Intelligent Measurement unit reaches is not with Intelligent Measurement unit two classes.Not fairly simple with the header box of intelligent cell, only be that the multichannel branch road is converged into one tunnel output, there is not communication interface, be unfavorable for monitoring in real time the operating state of solar energy group string, easily cause unnecessary loss, therefore inadvisable.And have the header box of Intelligent Measurement unit, and structure is complicated, often needs to use a plurality of galvanometer circuits unit, and this just causes cost too high, and the fault point is also more, thereby has influenced the normal use of header box.Therefore in header box is made, reduce number of sensors, assembling is made every effort to modular requirement and is just arisen at the historic moment.

Summary of the invention

The utility model provides a kind of modularization, intelligent and extensibility and the cheap relatively photovoltaic array header box of cost at the deficiencies in the prior art.

Realize above-mentioned purpose, the utility model adopts following technical scheme: a kind of photovoltaic array header box, include casing and be arranged on the interior circuit link block of casing, it is characterized in that: described circuit link block includes at least one group of electrode input end and the negative input of respective amount with it, every group of electrode input end includes two-way electric current positive pole at least, every group of negative input includes two-way electric current negative pole at least, every road electric current of described every group of electrode input end every road electric current negative pole anodal or every group of negative input is corresponding respectively is electrically connected with anodal fuse and galvanometer circuit unit or negative pole fuse and galvanometer circuit unit, gives check-out console by the galvanometer circuit unit with the electrical signal transfer that collects then.

By adopting such scheme, the utility model dc power anode input side or negative pole input side are all realized the overprotection function of system by fuse; Current detecting partly utilizes the mode of shunt resistance (as milliohm resistance) and modulate circuit thereof to realize the detection of electric current, can reduce the use of transducer like this, and have modular characteristics, can reduce the production cost, improves the earning rate of product.Such structure also can make things convenient for the engineering maintenance in later stage.Data processing module can be realized the detection of signals such as branch current and voltage, improves the integrality of system information, and for host computer provides information support comparatively reliably, convenient prompting user in time carries out system maintenance.When the Field Force safeguards at the scene,, can effectively understand the problem place, conveniently carry out on-site maintenance by data display unit.So just can improve the operation stability of system, improve energy output, reduce power generation loss, from guaranteeing the possessory income in power station to the full extent.

Further setting of the present utility model is: described check-out console includes A/D modular converter unit, processor unit, communication unit and data storage cell, wherein the signal input part of A/D modular converter unit links to each other with the output of galvanometer circuit unit, the signal output part of A/D modular converter unit links to each other with the processor unit input, the output of processor unit links to each other with communication unit and data storage cell, realize transfer of data and storage respectively, in order to preserve data and monitoring in real time; Every road electric current of described every group of electrode input end every road electric current negative pole anodal or every group of negative input is connected in parallel by bus-bar behind anodal fuse and galvanometer circuit unit or negative pole fuse and galvanometer circuit unit; Described direct-flow positive pole input unit all is connected with lightning protection device with the negative pole input unit.

Below in conjunction with accompanying drawing the utility model is further described.

Description of drawings

Fig. 1 is the circuit link block structural representation of example one of the present utility model;

Fig. 2 is the circuit link block structural representation of example two of the present utility model.

Embodiment

Embodiment one

As shown in Figure 1, a kind of photovoltaic array header box, include casing and be arranged on the interior circuit link block of casing, in the utility model embodiment, described circuit link block includes the many group electrode input ends and the negative input of respective amount with it, every group of electrode input end includes two-way electric current positive pole at least, every group of negative input includes two-way electric current negative pole at least, every road electric current positive electrical of described every group of electrode input end is connected withanodal fuse 1 andgalvanometer circuit unit 2, gives check-outconsole 8 bygalvanometer circuit unit 2 with the electrical signal transfer that collects then.In the utility model embodiment, described check-outconsole 8 includes A/D modular converter unit 4, processor unit 5,communication unit 7 anddata storage cell 6, wherein the signal input part of A/D modular converter unit 4 links to each other with the output ofgalvanometer circuit unit 2, the signal output part of A/D modular converter unit 4 links to each other with processor unit 5 inputs, the output of processor unit 5 links to each other withcommunication unit 7 anddata storage cell 6, realize transfer of data and storage respectively, in order to preserve data and monitoring in real time; Every road electric current positive pole of described every group of electrode input end is connected in parallel by bus-bar 3 behindanodal fuse 1 andgalvanometer circuit unit 2.

Embodiment two

As shown in Figure 2, a kind of photovoltaic array header box, include casing and be arranged on the interior circuit link block of casing, in the utility model embodiment, described circuit link block includes the many group electrode input ends and the negative input of respective amount with it, every group of electrode input end includes two-way electric current positive pole at least, every group of negative input includes two-way electric current negative pole at least, every road electric current negative electricity of described every group of negative input is connected withnegative pole fuse 1 andgalvanometer circuit unit 2, gives check-outconsole 8 bygalvanometer circuit unit 2 with the electrical signal transfer that collects then.In the utility model embodiment, described check-outconsole 8 includes A/D modular converter unit 4, processor unit 5,communication unit 7 anddata storage cell 6, wherein the signal input part of A/D modular converter unit 4 links to each other with the output ofgalvanometer circuit unit 2, the signal output part of A/D modular converter unit 4 links to each other with processor unit 5 inputs, the output of processor unit 5 links to each other withcommunication unit 7 anddata storage cell 6, realize transfer of data and storage respectively, in order to preserve data and monitoring in real time; Every road electric current negative pole of described every group of negative input is connected in parallel by bus-bar 3 behindnegative pole fuse 1 andgalvanometer circuit unit 2.

Claims (2)

1. photovoltaic array header box, include casing and be arranged on the interior circuit link block of casing, it is characterized in that: described circuit link block includes at least one group of electrode input end and the negative input of respective amount with it, every group of electrode input end includes two-way electric current positive pole at least, every group of negative input includes two-way electric current negative pole at least, every road electric current of described every group of electrode input end every road electric current negative pole anodal or every group of negative input is corresponding respectively is electrically connected with anodal fuse and galvanometer circuit unit or negative pole fuse and galvanometer circuit unit, gives check-out console by the galvanometer circuit unit with the electrical signal transfer that collects then.

2. photovoltaic array header box according to claim 1, it is characterized in that: described check-out console includes A/D modular converter unit, processor unit, communication unit and data storage cell, wherein the signal input part of A/D modular converter unit links to each other with the output of galvanometer circuit unit, the signal output part of A/D modular converter unit links to each other with the processor unit input, the output of processor unit links to each other with communication unit and data storage cell, realize transfer of data and storage respectively, in order to preserve data and monitoring in real time; Every road electric current of described every group of electrode input end every road electric current negative pole anodal or every group of negative input is connected in parallel by bus-bar behind anodal fuse and galvanometer circuit unit or negative pole fuse and galvanometer circuit unit.

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