汇流箱是光伏发电 系统中一个承前启后的产品，前有光伏电池电池阵列，后有逆变器，所以是一个非常重要的产品，由于工作条件在室外，因此长期受到雨雪侵袭，工作环境十分严酷。


以直流汇流箱为例，主要体现在：除汇流和防雷的主要作用外，还增加了电压、电流、温度的采集和工作状态监控，不平衡和失效报警、数据与传输等。

各发电企业对光伏电站的使用寿命规定为25年，在它的全生命周期里，里面的元器件能否经受住考验，业内都没有一个统一标准。

为了掌握光伏组件设备的运行状况，及时发现和消除设备缺陷预防事故的发生，确保完成发电计划，应认真做好设备巡视检查工作。


1、检查直流汇流箱各部件正常无变形，安装牢固无松动现象。

2、检查直流汇流箱外观干净无积灰、设备标号无脱落，设备标号字迹清晰准确。

3、检查直流汇流箱锁具完好，密封性良好。

4、直流汇流箱正常运行时各熔断器全部投入，采集板运行正常，防雷器、开关全部投入运行。

5、检查各元件无过热、异味、断线等异常现象，各电气元件在运行要求的状态。

6、采集板电源模块运行指示灯亮，各元件无异常。

7、防雷模块无击穿现象。

8、各支路保险无明显破裂。

9、检查直流汇流箱的直流开关配置正确，无脱口，保护定值正确。

10、检查数据采集器指示正常，信号显示与实际工况相符。

11、直流汇流箱柜体接地线连接可靠；断裂、脱落及时向当班值长汇报并进行处理。

12、检查直流汇流箱进出线电缆完好，无变色、掉落、松动或断线现象。

检修汇流箱时的注意事项：


1、在检修汇流箱某一支路时，一定要先断开断路器，再扳开要检修支路的保险盒，然后合上断路器，再去检修汇线。切记不能再未断开直流断路器时就去拔M4插头，也不能在未断开直流断路器的情况下直接去扳开保险盒，以免造成人生安全事故。

2、在检修汇流箱时，养成习惯性的将所有螺丝紧固一遍，在紧固螺丝时一定要注意安全，避免手同时触碰到正负极接线端，或者同时触碰到正极和PE线或者负极和PE线。 

The combiner box is a product connecting the past and the future in the photovoltaic power generation system. There is a photovoltaic cell array in the front and an inverter in the rear, so it is a very important product. Because the working conditions are outdoor, it has been attacked by rain and snow for a long time, and the working environment is very harsh.





Taking the DC combiner box as an example, it is mainly reflected in: in addition to the main functions of combiner and lightning protection, it also adds the collection of voltage, current and temperature, monitoring of working status, imbalance and failure alarm, data and transmission, etc.



The service life of photovoltaic power stations is set as 25 years by power generation enterprises. There is no unified standard in the industry whether the components can withstand the test in its full life cycle.



In order to master the operation status of PV module equipment, timely discover and eliminate equipment defects, prevent accidents, and ensure the completion of power generation plan, equipment patrol inspection shall be carefully carried out.





1. Check that all components of DC combiner box are normal without deformation, and installed firmly without looseness.



2. Check that the appearance of DC combiner box is clean without dust, the equipment label is free from falling off, and the equipment label is clear and accurate.



3. Check that the DC combiner box lock is in good condition and has good sealing.



4. When the DC combiner box operates normally, all fuses are put into operation, the acquisition board operates normally, and all lightning arresters and switches are put into operation.



5. Check that all components are free of abnormal phenomena such as overheating, odor and disconnection, and that all electrical components are in the state required for operation.



6. The operation indicator of the power module of the acquisition board is on, and all components are normal.



7. The lightning protection module has no breakdown.



8. The fuse of each branch shall be free from obvious rupture.



9. Check that the DC switch of the DC combiner box is configured correctly, there is no disconnection, and the protection setting is correct.



10. Check that the indication of the data collector is normal, and the signal display is consistent with the actual working condition.



11. The grounding wire of DC combiner box is reliably connected; The fracture and falling off shall be reported to the shift supervisor on duty in time and handled.



12. Check that the incoming and outgoing cables of the DC combiner box are intact without discoloration, falling, looseness or disconnection.



Precautions for maintenance of combiner box:





1. When overhauling a branch of the combiner box, the circuit breaker must be disconnected first, then the fuse box of the branch to be overhauled, and then the circuit breaker must be closed before overhauling the collector line. Remember not to pull out the M4 plug without disconnecting the DC circuit breaker, nor open the fuse box without disconnecting the DC circuit breaker, so as to avoid personal safety accidents.



2. When inspecting and repairing the combiner box, make it a habit to tighten all the screws. Pay attention to safety when tightening the screws to avoid touching the positive and negative terminals at the same time, or touching the positive and PE wires or the negative and PE wires at the same time.

  报错 笔记