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Distributed photovoltaic power generation grid-connected distribution box

A distributed photovoltaic and distribution box technology, applied in photovoltaic power generation, photovoltaic modules, electrical components, etc., can solve the problems of mass production of distributed photovoltaic power generation grid-connected distribution boxes, differences in distribution box wiring principles, open It can solve the problems of inconspicuous disconnection indication, etc., to achieve the effect of obvious disconnection indication function, low manufacturing cost, and simple and effective operation.

Inactive Publication Date: 2018-01-12
国网山东济南市历城区供电公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different types of circuit breakers used in the actual installation, there are differences in the wiring principles of the distribution box, which makes it impossible to quickly troubleshoot problems in later maintenance and repair operations. There is no systematic analysis and selection, which is not conducive to distributed photovoltaics. Mass production of grid-connected distribution boxes for power generation
The main defect is that the disconnection indication is not obvious, and it is necessary to understand the wiring principle to open the distribution box for manual operation, which is more complicated and less safe for non-electrical professionals

Method used

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  • Distributed photovoltaic power generation grid-connected distribution box
  • Distributed photovoltaic power generation grid-connected distribution box

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] like figure 1 The grid-connected distribution box for distributed photovoltaic power generation shown includes intermediate relay 1, switch QH, and normally open reset switch SB 1 , normally closed reset switch SB 2 , multi-contact reset switch SB 3 , Indicator Y, Indicator R and Indicator G.

[0031] The intermediate relay includes a 1KM coil, a normally open contact switch 1KM 1 , normally open contact switch 1KM 3 And normally closed contact switch 1KM 2 .

[0032] The multi-contact reset switch SB 3 Consists of one normally open and one normally closed contact.

[0033] One end of the changeover switch QH is connected to the line L and the other end corresponds to two parallel circuits. On one of the parallel circuits, it is connected with the 1KM coil and the multi-contact reset switch SB 3 The normally closed contacts in the circuit are connected in series to the line N, and the other parallel circuit is provided with a normally open contact switch 1KM 1 ...

Embodiment approach 2

[0040] like figure 2 As shown, compared with the above-mentioned embodiment, the intermediate relay 2 and the timer T are added in this embodiment, and the multi-contact reset switch SB 3 Two other normally closed contacts have also been added, and the intermediate relay has added a normally closed contact switch 1KM 4 . Compared with the previous implementation mode, it has a backup control circuit, which can still maintain the normal operation state when the intermediate relay fails, effectively ensuring the reliable operation of the grid-connected power distribution system, so that the maintenance personnel have enough time to check the intermediate relay. Once the relay is replaced in time, the tension of maintenance work is reduced. Specifically:

[0041] The intermediate relay two includes a 2KM coil, a normally open contact switch 2KM 1 , normally open contact switch 2KM 2 , normally open contact switch 2KM 4 And normally closed contact switch 2KM 3 .

[0042] ...

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Abstract

The invention provides a distributed photovoltaic power generation grid-connected distribution box, comprising an intermediate relay I, a selector switch QH, a normally open reset switch SB1, a normally closed reset switch SB2, a multi-contact switch SB3, an indicator light Y, an indicator light R and an indicator light G, wherein the intermediate relay I comprises a 1KM coil, a normally open contact switch 1KM1, a normally open contact switch 1KM3 and a normally closed contact switch 1KM2, and the multi-contact switch SB3 comprises a normally open contact and a normally closed contact. The distributed photovoltaic power generation grid-connected distribution box has the advantages that the open / closed indication function is obvious; a man-machine communication interface is clear and easy to understand and therefore the operation method can be mastered rapidly even by people not specialized in electric engineering, the operation is simple and effective, maintenance is facilitated, the reliable operation of a grid-connected distribution system can be effectively guaranteed; in addition, batch production can be realized due to low manufacturing cost.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation grid-connected control equipment, in particular to a distributed photovoltaic power generation grid-connected distribution box. Background technique [0002] Distributed photovoltaic power generation has been widely promoted due to its low investment, flexible power generation methods, and easy environmental compatibility. Its access system scheme is designed in accordance with the principle of spontaneous self-use surplus electricity connected to the Internet. The distributed photovoltaic power generation grid-connected distribution box is the grid-connected point of the distributed photovoltaic power station access system, which has a major impact on the long-term, stable and safe operation of the access system. [0003] The main functional element of the grid-connected distribution box for photovoltaic power generation currently in use is a circuit breaker. Due to the different ty...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02B1/20H02S40/30
CPCY02E10/56
Inventor 杨萌徐雪峰朱廷柏赵凯洪琪吴宾宾张健万旭董中义
Owner 国网山东济南市历城区供电公司