Common photovoltaic controllers are mainly PWM and MPPT. Many friends have doubts about the difference between the two. Here we briefly explain. PWM: Pulse-Width Modulation Pulse width modulation (PWM) refers to the use of microprocessor digital output to control analog…
The following is a detailed analysis and comparative summary of the R&D direction in the 2023 annual reports of six photovoltaic inverter manufacturers, including Sungrow Power Supply, Huawei Digital Energy, Jinlong Technology, GoodWe, Homai Co., Ltd. and Sineng Electric: 1.…
As the core equipment of the solar power generation system, the photovoltaic inverter undertakes the key task of converting direct current into alternating current. The stability of the IGBT (insulated gate bipolar transistor) module, as the core power device of…
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This is a multi-function inverter/charger, combining functions of inverter, solar charger, and battery charger to offer uninterruptible power support with portable size.Its comprehensive LCD display offers user-configurable and easy-accessible button operation such as battery charging current, AC/solar charger priority, and…
The primary differences between low-frequency inverters and high-frequency inverters lie in their design, efficiency, size, and application suitability, particularly in solar systems. Here’s a breakdown: Low-Frequency Inverters High-Frequency Inverters Which is Better for Solar Systems? Conclusion For most solar system…
逆变器类型String Inverter组串式逆变器连接一个或多个光伏组串的光伏逆变器，功率范围通常在3kW～150kWMicroinverter微型逆变器连接单个或多个光伏组件的小型光伏逆变器，功率范围通常在0.5～3kWMLPE (Module-Level Power Electronics)组件级电力电子设备包括功率优化器和微型逆变器在内的组件级电力管理设备Central Inverter集中式逆变器用于大型光伏电站的大功率逆变器，可接入组串数量更多，功率范围通常在250kW～1000kWOn-grid Inverter并网逆变器能够将光伏电能反馈到电网的光伏逆变器Off-grid Inverter离网逆变器独立于电网运行的逆变器系统，通常与电池储能系统配合使用Hybrid Inverter混合逆变器能够同时管理光伏输入和电池储能的逆变器 Bi-directional Inverter双向逆变器 能够实现交直流双向转换的逆变器，常用于储能系统，可以充电和放电，混合逆变器的另一种说法Transformerless Inverter无变压器逆变器/高频逆变器不使用工频变压器的逆变器，效率较高，也称为高频逆变器（high- frequency inverter），这一参数常见于逆变器拓扑（Inverter Topology）Utility- frequency Inverter工频逆变器使用工频变压器的逆变器，稳定性较好，但效率不及高频逆变器，目前主要在一些稳定性要求比较高的场景下应用（精密仪器） 逆变器功能和特性MPPT (Maximum Power Point Tracking)最大功率点跟踪光伏逆变器的最关键功能之一，使光伏系统输出最大化 Anti-islanding Protection防孤岛保护当电网断电时，自动停止向电网输出电力的安全功能LVRT (Low Voltage Ride Through)低电压穿越能力逆变器在电网电压短时下降时保持并网的能力 HVRT (High Voltage Ride Through)高电压穿越能力 逆变器在电网电压短时升高时保持并网的能力 FRT (Fault Ride Through)故障穿越能力电力设备在电网故障期间保持运行的能力FFR (Fast…
What is the island effect? The island effect refers to the situation where when the grid power supply trips due to a fault or power outage for maintenance, the photovoltaic grid-connected power generation system fails to detect the power outage…
Summary of MPPT working principle What is an MPPT controller? MPPT is the abbreviation of “Maximum Power Point Tracking”, which is an upgraded product of the traditional solar charge and discharge controller. Its function is that the controller can detect…
What are the operating statuses of photovoltaic inverters? Photovoltaic power station inverters have five operating states: waiting, self-test, normal power generation, fault and shutdown. After the photovoltaic power transmission starts, the display will show “Waiting”. If the photovoltaic system is…