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光伏电站有哪些验收标准

光伏电站之

验收标准




支架安装验收


1.采用紧固件的支架,紧固点应牢固,不应有弹垫未压平等现象。

2.支架倾斜角度偏差不应大于士1°。

3.支架安装的垂直度及水平度的偏差应符合现行国家标准《光伏电站施工规范》的有关规定。

4.支架的防腐处理应符合设计要求。



光伏组件验收

1. 光伏组件的外观及接线盒、连接器应完好无损,无划伤及隐裂现象。

2.光伏组件间接插件连接应牢固,连接线应进行处理、整齐、美观。

3.方阵的绝缘电阻应符合设计要求

4.光伏组件进行串连接后应对光伏组串的开路电压和短路电流进行测试。

5.光伏组件安装倾斜角度偏差不大于士1°。

6.相邻光伏组件边缘高差小于等于2mm,同组光伏组件边缘高差小于等于5mm。

7、布线的验收应符合下列要求:

1)光伏组件串、并联方式应符合设计要求。

2)光伏组件串标识应符合设计要求。

3)光伏组件串开路电压和短路电流应符合现行国家标准《光伏电站施工规范》GB50794的有关规定。



电缆安装的验收

1.直流电缆的规格应符合设计要求,标示牌应装设齐全、正确、清晰。

2.直流电缆的固定、弯曲半径、有关距离应符合设计要求。

3.直流电缆线路所有接地的接点与接地极应接触良好,接地电阻值应符合设计要求。

4.防火措施应符合设计要求。

5.交流电缆安装的验收应符合现行国家标准《电气装置安装工程电缆线路施工及验收规范》的有关规定。



逆变器设备的验收 

1.逆变器的交流侧接口处应牢固可靠。

2.逆变器与基础间连接应牢固可靠

3.变压器和互感器的安装验收应符合国家现行标准《电气装置安装工程电力变压器、油浸电抗器互感器施工及规范验收》的有关规定。

4.汇流箱标识应产全,箱体与支架连接应牢固。

5.逆变器外观及主要零部件不应有损坏和受潮现象元器件不应有松动或丢失。

6.逆变器的标签内容应符合要求,应标明负载的连接点和极性。


防雷接地安装的验收 

1.光伏发电站防雷系统的施工应按照设计文件的要求进行。

2.地面光伏系统的金属支架应与主接地网可靠连接;光伏组件应将边框可靠接地。

3.汇流箱及逆变器等电器设备的接地应牢固可靠、导通良好,金属盘门应用裸铜软导线与金属构架或接地排可靠接地。

4.光伏发电站的各接地点接地电阻阻值应满足设计要求。

细致验收可分为:

1、防雷分类问题
建筑物应根据其重要性、使用性质、发生雷电事故的可能性和后果,按防雷的要求分为一、二、三类防雷建筑物。
2、接闪器和引下线的问题
接闪器在一般情况下多数采用避雷针、避雷网、避雷带。有时在大面积需要保护情况下,可以采用避雷线保护。在搞环境防雷时,可以采用CA-A3防雷器或法国提前放雷避雷针保护。
3、地极及地极接地冲击电阻的问题
如果建筑物的防雷地极是独立地极的话,一般要离开建筑物基础的地中距离3M以远;如果是通信用的独立地极的话,则要求离开建筑物20M以远,并要求接地电阻〈4欧。
除去一类防雷建筑物属于0区和1区,用独立避雷针、独立地极保护外,其余类别一般情况下,都采用合设地极的方式,尤其是框架结构的建筑物更应采用本身基础作合设地极使用。
4、均压环的设计和施工问题
均压环是一条闭合的藏在建筑物外墙内的水平避雷带。它一方面与外墙所有的引下线焊接相连,另一方面又与外墙上所有金属门、窗、玻璃幕墙相通,将它们所接闪到的雷电流通过均压环、引下线的作用,将雷电流引入大地汇放。
5、电子设备的等电位处理问题
等电位处理就是用金属导体把设备的金属外壳与接地的汇流排连接起来。等电位处理的目的就是消除电位差,因此,所有引入室内的金属管道、电缆屏蔽层在各个不同的防雷区间之间均应作等到电位处理。
另外,室外凡互相跨越或平行敷设的金属管道,如果其间距少于100MM规定的间距,也应用金属线互相跨接起来,采取等电位的处理方法避免反击。室内电子设备的等到电位的连接方式应采用一点式方法接地,而不应互相串联连接接地,以免引起干扰现象。
6、设备屏蔽的处理问题
屏蔽的作用是防止雷电感应对电子设备和干扰,根据不同的对象,屏蔽分有房屋屏蔽、管线屏蔽和设备屏蔽三种。屏蔽的效果与材料的导磁率有关,与材料的厚度尺寸有关;与网孔的大小尺寸有关。网孔越少,材料越厚,材料的导磁率越好则屏蔽的效果越好。
7、线缆的敷设问题
线缆最好采用埋地套铁管的方式敷设。缆井应设计在建筑物的几何中心。室内的线缆布置应避开外墙、梁柱等雷电流集中流过的地方,以免对线缆产生大的干扰现象。同理,电子设备的放置问题,也应离开外墙、梁柱有一定的安全距离。
8、供电形式
供电的形式最好采用TN-S系统。供电线路最好埋地套铁管引入。N线、PE线重复接地引出,电源装电源避雷器。
9、各种信号线装信号避雷器问题
对信号避雷器的选择的要求是工作频率适合、传输功率大,插入损耗低、验波系数少,雷电通流量大,响应时间快,残压低的信号避雷器。同时避雷器应有良好的接地。

Support installation acceptance

1. When using a bracket with fasteners, the fastening points should be firm and there should be no uneven compression of the spring washer.

2. The tilt angle deviation of the bracket should not exceed ± 1 °


3. The deviation of the verticality and levelness of the bracket installation should comply with the relevant provisions of the current national standard "Construction Specification for Photovoltaic Power Stations".

4. The anti-corrosion treatment of the bracket should meet the design requirements.


Photovoltaic module acceptance

1. The appearance, junction box, and connectors of photovoltaic modules should be intact, without scratches or hidden cracks.

2. The indirect plug-in connection of photovoltaic modules should be firm, and the connecting wires should be processed, neat, and aesthetically pleasing.

3. The insulation resistance of the square array should meet the design requirements

4. After the photovoltaic modules are connected in series, the open circuit voltage and short circuit current of the photovoltaic string should be tested.

5. The inclination angle deviation of photovoltaic module installation shall not exceed ± 1 °.

6. The height difference at the edges of adjacent photovoltaic modules is less than or equal to 2mm, and the height difference at the edges of photovoltaic modules in the same group is less than or equal to 5mm.

7. The acceptance of wiring should meet the following requirements:

1) The series and parallel connection of photovoltaic modules should meet the design requirements.

2) The serial identification of photovoltaic modules should meet the design requirements.

3) The open circuit voltage and short circuit current of photovoltaic module strings should comply with the relevant provisions of the current national standard "Construction Code for Photovoltaic Power Stations" GB50794.


Acceptance of cable installation


1. The specifications of DC cables should meet the design requirements, and the signage should be installed completely, correctly, and clearly.

2. The fixation, bending radius, and relevant distance of DC cables should meet the design requirements.

3. All grounding contacts and grounding electrodes of DC cable lines should have good contact, and the grounding resistance value should meet the design requirements.

4. Fire prevention measures should meet the design requirements.

5. The acceptance of communication cable installation should comply with the relevant provisions of the current national standard "Code for Construction and Acceptance of Cable Lines in Electrical Equipment Installation Engineering".


Acceptance of inverter equipment

1. The AC side interface of the inverter should be firm and reliable.

2. The connection between the inverter and the foundation should be firm and reliable

3. The installation and acceptance of transformers and transformers shall comply with the relevant provisions of the current national standard "Construction and Specification Acceptance of Power Transformers and Oil Immersed Reactors in Electrical Equipment Installation Engineering".

4. The identification of the junction box should be complete, and the connection between the box and the bracket should be firm.

5. The appearance and main components of the inverter should not be damaged or damp, and the components should not be loose or lost.

6.The label content of the inverter should meet the requirements and indicate the connection point and polarity of the load.

Acceptance of lightning protection grounding installation

1.The construction of the lightning protection system for photovoltaic power plants should be carried out in accordance with the requirements of the design documents.

2. The metal bracket of the ground photovoltaic system should be reliably connected to the main grounding grid; The photovoltaic modules should have their frames reliably grounded.

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