水泥平屋顶

Cement flat roof

水泥平屋顶要求设计为上人屋面，这样既能满足光伏系统对屋面所产生的荷载要求，又方便后期光伏系统的维护工作。结合不同地区的纬度信息、光伏组件设计最佳倾角，可实现最佳发电量。

The cement flat roof is required to be designed as an accessible roof, which can not only meet the load requirements of the photovoltaic system on the roof, but also facilitate the maintenance work of the photovoltaic system in the later stage. By combining latitude information from different regions and designing the optimal tilt angle of photovoltaic modules, the optimal power generation can be achieved.

彩钢瓦屋顶

Color steel tile roof

由于厂房屋面多为非上人屋面，如果要在项目初期考虑增加光伏系统，建议加大厂房屋面活荷载，取值最好大于0.7KN/㎡。

Due to the fact that the roofs of the factory buildings are mostly non accessible, if we want to consider adding a photovoltaic system in the early stages of the project, it is recommended to increase the live load on the factory building roof, with a value preferably greater than 0.7KN/m2.

工商业光伏系统并网模式

Grid connection mode of industrial and commercial photovoltaic systems

并网模式分为自发自用、余电上网，全额上网和自发自用三种，其中自发自用、余电上网的并网模式适合白天用电量较大的厂房，自用比例越高，成本回收周期越短。

The grid connection mode can be divided into three types: spontaneous self use, surplus electricity grid connection, full grid connection, and spontaneous self use. Among them, the grid connection mode of spontaneous self use and surplus electricity grid connection is suitable for factories with high daytime electricity consumption. The higher the proportion of self use, the shorter the cost recovery cycle.

工商业光伏电站系统关键设备

Key equipment for industrial and commercial photovoltaic power station systems

工商业光伏电站系统关键设备包括光伏组件、逆变器、支架、支架、并网柜、线材等。工商业光伏电站分中压及低压并网，区分于大型工厂及小型厂房，大型工厂（中压并网）、小型厂房（低压并网），配置也各有不同。

The key equipment of industrial and commercial photovoltaic power station systems includes photovoltaic modules, inverters, brackets, brackets, grid connected cabinets, wires, etc. Industrial and commercial photovoltaic power stations are divided into medium voltage and low voltage grid connected, distinguished from large factories and small factories. Large factories (medium voltage grid connected) and small factories (low voltage grid connected) also have different configurations.

组件-——

Components-——

一线品牌供应链生态合作伙伴，多元化选择

First tier brand supply chain ecological partners, diversified choices

组件作为光能转换电能设备，根据安装面积进行装机容量计算，然后结合光伏组件技术参数进行组件规格选择，考虑性价比因素，利用有限的面积提升装机容量；系统最佳倾角近似于当地纬度角，或者根据屋顶结构，组件平行于屋顶坡度铺设，使用角度测量仪可测量倾角。

As a device for converting solar energy into electrical energy, the installed capacity of the module is calculated based on the installation area, and then the module specifications are selected in combination with the technical parameters of the photovoltaic module, considering cost-effectiveness factors and using limited area to increase the installed capacity; The optimal inclination angle of the system is approximately the local latitude angle, or according to the roof structure, the components are laid parallel to the roof slope, and the inclination angle can be measured using an angle measuring instrument.

逆变器——

Inverter——

适当超配，选用合适参数的逆变器

Proper configuration and selection of inverters with appropriate parameters

根据项目所在地情况、占地面积大小等因素确定好所使用的组件型号、数量后，需要以组件的总发电量和组件的短路电流、开路电压等参数为选择依据，选用合适参数的逆变器。

After determining the model and quantity of components to be used based on factors such as the location of the project and the size of the occupied area, it is necessary to choose an inverter with appropriate parameters based on the total power generation of the components and the parameters such as short-circuit current and open circuit voltage of the components.

功率选择：适当超配

Power Selection: Appropriate Overconfiguration

在实际的光伏发电过程中，由于建筑物遮挡、组件灰尘、不同天气的辐照度波动等多种因素的影响，光伏组件的实际发电量会少于标准发电量。此时，若逆变器的容量与组件发电量保持1:1适配，会使逆变器长期处于非满载运行的状态，降低逆变器利用率，造成发电收益的损失。因此，在选择逆变器的功率时，组件与逆变器的容配比范围应该在1.1-1.3之间。

In the actual photovoltaic power generation process, due to various factors such as building obstruction, component dust, and fluctuations in irradiance under different weather conditions, the actual power generation of photovoltaic modules will be less than the standard power generation. At this point, if the capacity of the inverter is 1:1 compatible with the power generation of the components, it will keep the inverter in a non full load operation state for a long time, reduce the utilization rate of the inverter, and cause a loss of power generation revenue. Therefore, when selecting the power of the inverter, the capacitance ratio range between the components and the inverter should be between 1.1 and 1.3. Please refer to the table below; At the same time, the inverter needs to have overload capability.