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逆变器作为光伏电站的电能转换设备，在整个电站中占据着举足轻重的地位。光伏逆变器是将组件产生的低压直流电转换为交流电的电力电子设备，接入负载或者并入到电网中，是光伏系统中的核心器件。并网逆变器有以下的主要功能：
将光伏组件产生的直流电转换为交流电
通过最大功率跟踪器，动态地查找和利用最大功率点（MPP）来实现可用功率的最大化
记录运行数据
提供电流、电压及当地电网的相关保护
逆变器的分类有哪些？
就产品类型而言，目前逆变器产品主要分为四类，即：
集中式逆变器（功率范围在250KW-10MW ，主要用于大型地面电站）
集散式逆变器（功率范围在1MW-10MW，主要用于复杂的大型地面电站）
组串式逆变器（功率范围在1.5KW-250KW，主要用于户用、工商业分布式和地面电站等）
微型逆变器（功率范围一般在4kW以下，主要应用于分布式等中小型电站。基于对光伏安全问题考虑，也越来越多被应用于大型工商业分布式电站）
微型逆变器可对系统中每块组件进行逆变并进行独立的MPPT控制，能够大幅提高整体效率，同时也可以避免传统逆变器具有的直流高压、弱光效应差、木桶效应等。
As the power conversion equipment of photovoltaic power station, inverter occupies a pivotal position in the whole power station. Photovoltaic inverter is a power electronic device that converts low-voltage direct current generated by the module into alternating current. It is connected to the load or incorporated into the power grid. It is the core device in the photovoltaic system. Grid-connected inverter has the following main functions:
The direct current generated by photovoltaic modules is converted to alternating current
Through the maximum power tracker, the maximum power point (MPP) is dynamically found and utilized to maximize the available power
Recording Running Data
Provide current, voltage and local grid protection
02
What are the classification of inverters?
In terms of product types, inverter products are mainly divided into four categories at present, namely:
Centralized inverter (power range: 250KW-10MW, mainly used in large ground power stations)
Distributed inverter (power range: 1MW-10MW, mainly used in complex large ground power stations)
Cluster series inverter (power range is 1.5KW-250KW, mainly used for household, industrial and commercial distributed and ground power stations, etc.)
Micro inverter (power range is generally below 4kW, mainly used in distributed small and medium-sized power stations. Based on the consideration of photovoltaic safety, it is more and more applied to large industrial and commercial distributed power stations.)
The micro inverter can invert each component in the system and carry out independent MPPT control, which can greatly improve the overall efficiency, but also avoid the traditional inverter some DC high voltage, poor light effect, barrel effect, etc.