CN202332865U - Photovoltaic confluence and current monitoring structure - Google Patents
Photovoltaic confluence and current monitoring structure Download PDFInfo
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- CN202332865U CN202332865U CN2011203357633U CN201120335763U CN202332865U CN 202332865 U CN202332865 U CN 202332865U CN 2011203357633 U CN2011203357633 U CN 2011203357633U CN 201120335763 U CN201120335763 U CN 201120335763U CN 202332865 U CN202332865 U CN 202332865U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims 1
- 239000000306 component Substances 0.000 abstract 1
- 239000008358 core component Substances 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 8
- 230000032683 aging Effects 0.000 description 2
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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Abstract
The utility model discloses a photovoltaic confluence and current monitoring structure, which belongs to the field of photovoltaic generation in new energies and is a novel structure for realizing photovoltaic confluence and current monitoring. Traditional photovoltaic confluence monitoring based on a Hall sensor is high in cost and unlikely to realize high precision; and traditional photovoltaic confluence monitoring based on a current divider is low in cost and high in precision, but low in system reliability as a plurality of contacts exist. The structure disclosed by the utility model solves the contradiction among monitoring precision, cost and reliability of the traditional photovoltaic confluence monitoring. A core component of the structure is a sensing confluence unit; the structure is essentially characterized by being realized by one component in a way of combining a current sensor and a confluence plate into one. The structure combines confluence and current sensing, thereby avoiding use of connection leads or printed circuit boards between the current divider and the confluence unit in a traditional photovoltaic confluence monitoring proposal which uses the current divider, and further reducing contacts of the leads or preventing large current from flowing by the printed circuit boards; in this way, reliability is greatly increased while system cost being decreased.
Description
Technical field
The utility model belongs to the field of photovoltaic power generation in the new forms of energy, is to realize that photovoltaic confluxes and a kind of new construction of current monitoring.Confluxing here is meant multichannel photovoltaic group string or assembly parallel connection; Current monitoring refers to the generation current of each photovoltaic group string of real-time measurement or assembly.
Background technology
Photovoltaic confluxes and monitors the box that confluxes, header box or the direct current cabinet that generally is arranged in photovoltaic plant, is indispensable function in the photovoltaic generation.Current, photovoltaic conflux in the monitoring to conflux with current monitoring be separately to be accomplished by two parts.Confluxing generally is the cylinder manifold completion of being made by metal.The maximum scheme of the current use of current monitoring is that Hall current sensor is (with reference to figure 1; Confluxing with four the tunnel is the conflux monitoring principle of example explanation based on Hall current sensor; Wherein 11 for the back lead that confluxes, 12 for photovoltaic group string lead, 13 for cylinder manifold, 14 for Hall element, 15 for screw contact, 16 for measurement point); The photovoltaic ampere wires passes in the middle of Hall element, realizes the contactless isolation measurement.The shortcoming of this scheme is that cost is high, certainty of measurement is not allowed the height that is easy to do.The low scheme of another kind of relative cost is to adopt shunt (with reference to figure 2; Confluxing with four the tunnel is the conflux monitoring principle of example explanation based on shunt; Wherein 21 are the screw contact for cylinder manifold, 24 shunts, 25 for photovoltaic group string lead, 23 for the back lead that confluxes, 22); Can realize that low-cost and high-precision measures, but that shortcoming is a contact is many.Because the photovoltaic electric current is bigger, voltage is higher, so each contact all is a potential risks point, if spark generated heat or produced to the contact loose contact will, causes fault, very person's burning apparatus.In order to reduce the screw number of contacts in the shunt scheme, cylinder manifold can realize that shunt directly is welded on the printed circuit board (PCB) with printed circuit board (PCB).This method can reduce some number of contacts, but because the electric current of flowing through is very big and be to work long hours, causes the printed circuit board (PCB) heating aging easily, and the life-span does not reach requirement.In a word, current photovoltaic confluxes in the monitoring, if adopt the Hall element scheme, reliability is high, but the cost high accuracy is low; If select the shunt scheme for use, the low precision of cost is high, but reliability is low.Also there is not at present a kind of promptly cheap highly reliable again technology.
Summary of the invention
In order to solve current photovoltaic conflux cost and the precision of monitoring scheme, the contradiction of reliability, the utility model provides a kind of structure of innovation, with implemented with low cost highly reliablely high-precisionly conflux and monitor.
The utility model solves the technical scheme that its technical problem adopted: the core texture of the utility model is referred to as the sensing junction station here, and it is the prong like that adopts the low metal (like copper-manganese) of temperature coefficient of resistance to make.Photovoltaic group crosstalk current wire is connected with the bifurcated of sensing junction station, and the back lead that confluxes is connected with the trunk of sensing junction station, like this through the sensing junction station realization combining functions that confluxes.Each bifurcated of sensing junction station has all carried out impedance Control and demarcation, each bifurcated quite with a small resistor, and each branch is stuck two voltage test points is all arranged.Every road photovoltaic group crosstalk stream is out-of-date at sensing junction station upper reaches, just sticks the formation voltage difference at branch, divides the test point voltage difference of sticking to flow through the current value of corresponding bifurcated with regard to calculating through measuring.Each bifurcated of sensing junction station is from be exactly a high-precision shunt in essence.And the sensing junction station is from being exactly two parts unifications of traditional current sensor (shunt) and cylinder manifold in essence.
The beneficial effect of the utility model is: the work that the utility model has realized having originally two parts (current sensor and cylinder manifold) to accomplish by parts of sensing junction station, with the implemented with low cost of shunt scheme the high reliability of Hall element scheme.The sensing junction station confluxes conventional current transducer (shunt) and two parts unifications of cylinder manifold and two functions of current sense by a parts sensing junction station completion.This structure has been avoided the higher relatively Hall current sensor of use cost, thereby has reduced cost; Avoided simultaneously traditional shunt photovoltaic conflux shunt in the monitoring scheme and conflux between connection lead or printed circuit board (PCB), thereby reduced wire joining or avoided the big electric current printed circuit board (PCB) of flowing through.The photovoltaic electric current directly flows through from the sensing junction station, without printed circuit board (PCB), does not have the aging problem of printed circuit board (PCB) heating, can't help having simplified system cost, and has improved reliability greatly.
Description of drawings
This specification has three accompanying drawing: Fig. 1, based on the monitoring topology of confluxing of Hall current sensor; Fig. 2 is based on the monitoring topology of confluxing of shunt; Fig. 3, based on the monitoring topology of confluxing of sensing junction station, among the figure 31 for the back lead that confluxes, 32 for photovoltaic group string lead, 33 for sensing junction station, 36 be measurement point.
Embodiment
Fig. 3 be to use the utility model realize four road photovoltaics conflux the monitoring examples of implementation.Sensing junction station in this example is the prong like of four bifurcateds of a trunk of being made by copper-manganese.The ampere wires of photovoltaic string is connected on the terminal of each bifurcated through the screw contact, and being connected on the screw contact of trunk end than heavy gauge wire after confluxing so just realized that the photovoltaic electric current confluxes.Each bifurcated all equivalence is an accurate shunt; Small resistor just, each branch has been stuck two measurement points, and it is good to demarcate before the main current channel resistance value between the measurement point is dispatched from the factory; Such as being 25m Ω; Measure voltage difference between two measurement points that each branch sticks like this and just can extrapolate the current value of this bifurcated that circulates, the generation current of just corresponding photovoltaic string has so just been realized the photovoltaic current monitoring.
Claims (4)
1. a photovoltaic confluxes and the current monitoring structure; It is the device that photovoltaic group string generation current is monitored and confluxed; It is characterized in that current sensor and two parts unifications of cylinder manifold; By an one, integrate and conflux and the metal parts of current sense constitutes, this metal parts is referred to as the sensing junction station.
2. photovoltaic as claimed in claim 1 confluxes and the current monitoring structure, and the material that it is characterized in that said sensing junction station is the low metal of temperature coefficient of resistance.
3. photovoltaic as claimed in claim 1 confluxes and the current monitoring structure; The shape that it is characterized in that said sensing junction station is forked that a plurality of bifurcated branch roads are arranged; Its each bifurcated has carried out impedance Control and demarcation; And each branch has been stuck two voltage test points, calculates the photovoltaic generation current value of learning this branch road of flowing through through measuring these two voltage test points voltage differences.
4. conflux and the current monitoring structure like claim 1 or the described photovoltaic of claim 3, it is characterized in that a side of all bifurcateds of said sensing junction station links to each other with photovoltaic group string or assembly, bifurcated branch road opposite side pools together the realization combining functions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203357633U CN202332865U (en) | 2011-08-27 | 2011-08-27 | Photovoltaic confluence and current monitoring structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203357633U CN202332865U (en) | 2011-08-27 | 2011-08-27 | Photovoltaic confluence and current monitoring structure |
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| Publication Number | Publication Date |
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| CN202332865U true CN202332865U (en) | 2012-07-11 |
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| CN2011203357633U Expired - Lifetime CN202332865U (en) | 2011-08-27 | 2011-08-27 | Photovoltaic confluence and current monitoring structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104681669A (en) * | 2015-03-05 | 2015-06-03 | 苏州阿特斯阳光电力科技有限公司 | Preparation method of photovoltaic conversion laminated piece and electrical performance testing method thereof |
| CN105699740A (en) * | 2014-11-28 | 2016-06-22 | 国家电网公司 | Method for measuring all-scale range current |
| CN106771482A (en) * | 2016-12-11 | 2017-05-31 | 湖北永恒太阳能股份有限公司 | A kind of current divider in new information solar power system |
-
2011
- 2011-08-27 CN CN2011203357633U patent/CN202332865U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699740A (en) * | 2014-11-28 | 2016-06-22 | 国家电网公司 | Method for measuring all-scale range current |
| CN104681669A (en) * | 2015-03-05 | 2015-06-03 | 苏州阿特斯阳光电力科技有限公司 | Preparation method of photovoltaic conversion laminated piece and electrical performance testing method thereof |
| CN106771482A (en) * | 2016-12-11 | 2017-05-31 | 湖北永恒太阳能股份有限公司 | A kind of current divider in new information solar power system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: FONRICH (SHANGHAI) NEW ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHANG YONG Effective date: 20121108 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121108 Address after: 201112, No. 7, Urarie Chise business park, No. 1188, Union Road, Shanghai, Minhang District, A303 Patentee after: Fengzhi (Shanghai) New Energy Technology Co., Ltd. Address before: 201112, room 1188, building 7, Urarie Chise business garden, Union Road, Shanghai, Minhang District, Patentee before: Zhang Yong |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 201114, Shanghai, Minhang District, Pujiang, Zhenjiang Road, No. 999, 5 odd floor Park, 1 floor Patentee after: Fengzhi (Shanghai) New Energy Technology Co., Ltd. Address before: 201112, No. 7, Urarie Chise business park, No. 1188, Union Road, Shanghai, Minhang District, A303 Patentee before: Fengzhi (Shanghai) New Energy Technology Co., Ltd. |
|
| DD01 | Delivery of document by public notice |
Addressee: Fengzhi (Shanghai) New Energy Technology Co., Ltd. Document name: Notification of Passing Examination on Formalities |
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| CX01 | Expiry of patent term |
Granted publication date: 20120711 |
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| CX01 | Expiry of patent term |