利索-全球专利检索

  1. 登录
  2. 注册
发明授权
CN105375510B 光伏逆变器系统及其在高开路电压的启动方法 有权 转让

光伏逆变器系统及其在高开路电压的启动方法
摘要：
本发明涉及光伏逆变器系统及其在高开路电压的启动方法。电力逆变器系统包括配置成把来自DC电源的DC电压转换成AC电压的DC‑AC逆变器。DC链路将DC电源和逆变器耦合。逆变器预充电器进行操作以对逆变器预充电，以便在将电力逆变器系统连接到AC电力网之前实现期望DC链路电压。锁相环在将电力逆变器系统连接到AC电力网之前使预充电逆变器同步到AC电力网。预充电逆变器将DC链路电压调节到允许在将电力逆变器系统连接到AC电网之后经由逆变器控制AC电网电流的大约最小电压水平。逆变器仅在通过连接DC电源以对电力逆变器系统通电所引起的第一电压瞬态之后才工作在最大功率点跟踪控制模式。
摘要（英）：

A power inverter system (200) includes a DC to AC inverter (230) configured to convert DC voltage from a DC power source (210) to AC voltage. A DC link (226) couples the DC power source (210) and the inverter (230). An inverter pre-charger (350) operates to pre-charge the inverter (230) to achieve a desired DC link voltage prior to connecting the power inverter system (200) to an AC power grid (240). A phased lock loop (352) synchronizes the pre-charged inverter (230) to the AC power grid (240) prior to connecting the power inverter system (200) to the AC power grid (240). The pre-charged inverter (230) regulates the DC link voltage to about the minimum voltage level that allows control of AC grid currents via the inverter (230) subsequent to connecting the power inverter system (200) to the AC grid (240). The inverter (230) operates in a maximum power point tracking control mode only subsequent to a first voltage transient caused by connecting the DC power source (210) to energize the power inverter system (200).

公开/授权文献
0/0