光伏并網發電系統是由光伏組件、電池方陣、匯流箱，逆變器，交流配電柜（并網柜）、變壓器等設備組成。其部分設備的作用是：

　　The photovoltaic grid connected power generation system is composed of photovoltaic modules, battery arrays, combiner boxes, inverters, AC distribution cabinets (grid connected cabinets), transformers and other equipment. The function of some of its devices is to:

　　光伏組件

　　Photovoltaic modules

　　在有光照（無論是太陽光，還是其它發光體產生的光照）情況下，電池吸收光能，電池兩端出現異號電荷的積累，即產生“光生電壓”，這就是“光生伏特效應”。在光生伏特效應的作用下，太陽能電池的兩端產生電動勢，將光能轉換成電能，是能量轉換的器件。太陽能電池一般為硅電池，分為單晶硅太陽能電池，多晶硅太陽能電池和非晶硅太陽能電池三種。

　　In the presence of light (whether from the sun or other luminous sources), the battery absorbs light energy and accumulates opposite numbered charges at both ends, resulting in the generation of "photovoltaic voltage", which is known as the "photovoltaic effect". Under the action of the photovoltaic effect, the two ends of a solar cell generate electromotive force, which converts light energy into electrical energy, making it an energy conversion device. Solar cells are generally silicon cells, divided into three types: monocrystalline silicon solar cells, polycrystalline silicon solar cells, and amorphous silicon solar cells.

　　組件方陣

　　Component array

　　單塊的光伏組件不能夠形成足夠的電壓用來發電，必須有一定數量的光伏組件進行串聯，形成足夠的電壓。這個電壓一般在200~1000V。

　　A single photovoltaic module cannot generate sufficient voltage for power generation, and a certain number of photovoltaic modules must be connected in series to form sufficient voltage. This voltage is usually between 200 and 1000V.

　　光伏直流匯流箱

　　Photovoltaic DC combiner box

　　在太陽能光伏發電系統中，為了減少太陽能光伏電池陣列與逆變器之間的連線使用到匯流箱。用戶可以將一定數量、規格相同的光伏電池串聯起來，組成一個個光伏組串，然后再將若干個光伏組串并聯接入光伏匯流箱，為了提高系統的可靠性和實用性，在光伏防雷匯流箱里配置了光伏專用直流防雷模塊、直流熔斷器和斷路器等，還可以加裝監控功能模塊方便用戶及時準確的掌握光伏組件的工作情況，保證太陽能光伏發電系統發揮最大功效。

　　In the solar photovoltaic power generation system, a combiner box is used to reduce the connection between the solar photovoltaic cell array and the inverter. Users can connect a certain number and specifications of photovoltaic cells in series to form photovoltaic strings, and then connect several photovoltaic strings in parallel to the photovoltaic combiner box. In order to improve the reliability and practicality of the system, photovoltaic dedicated DC lightning protection modules, DC fuses, circuit breakers, etc. are configured in the photovoltaic lightning protection combiner box. Monitoring function modules can also be installed to facilitate users to timely and accurately grasp the working condition of photovoltaic modules, ensuring that the solar photovoltaic power generation system can play its maximum role.

　　逆變器

　　inverter

　　是將直流電轉換成交流電的設備。由于光伏組件方陣是直流電源，而負載是交流負載時，逆變器是必不可少的。逆變器按運行方式，可分為獨立運行逆變器和并網逆變器。獨立運行逆變器用于獨立運行的太陽能電池發電系統，為獨立負載供電。并網逆變器是用于并網運行的太陽能電池發電系統。

　　It is a device that converts direct current into alternating current. Due to the fact that the photovoltaic module array is a DC power source and the load is an AC load, an inverter is essential. Inverters can be divided into independent operating inverters and grid connected inverters according to their operating modes. The independent operation inverter is used for a solar cell power generation system that operates independently and supplies power to independent loads. Grid connected inverter is a solar cell power generation system used for grid connected operation.

　　交流配電柜（并網柜）

　　AC distribution cabinet (grid connected cabinet)

　　作為光伏電站的總出口存在于光伏系統中，是連接光伏電站和電網的配電裝置，其主要作用是作為光伏發電系統與電網的分界點。對于低壓并網的光伏電站，光伏并網柜中還可以加裝計量、保護等功能器件。

　　As the total export of photovoltaic power plants, it exists in the photovoltaic system and is a distribution device that connects the photovoltaic power plant and the power grid. Its main function is to serve as the boundary point between the photovoltaic power generation system and the power grid. For low-voltage grid connected photovoltaic power plants, metering, protection and other functional devices can also be installed in the photovoltaic grid cabinet.

　　監控系統

　　monitoring system

　　光伏發電系統，在維護過程中可以配置監控系統，有助于提高運行的可靠性，及早進行維護工作，提高發電的效率。變壓器變壓器一般都是升壓變壓器，它將光伏逆變器所逆變出來的交流電，通過升壓達到并網電網的電壓等級。

　　The photovoltaic power generation system can be equipped with a monitoring system during maintenance, which helps to improve the reliability of operation, carry out maintenance work early, and improve the efficiency of power generation. Transformers are generally boost transformers, which convert the AC power inverted by photovoltaic inverters into voltage levels that are connected to the grid through boosting.

　　變壓器

　　transformer

　　應該具有隔離功能。一般變壓器位于并網交流柜的前段（從電流流向上看，在光伏系統中，電流是從逆變器流向電網）

　　It should have isolation function. Generally, the transformer is located in the front section of the grid connected AC cabinet (from the perspective of current flow, in a photovoltaic system, current flows from the inverter to the grid)

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