- 學位論文
柔性切換應用於太陽光電能三相換流器之模擬與分析
Simulation Analysis of Using Soft Switching for Photovoltaic Three Phase Inverter
摘要
摘要 本文以模擬之方式來控制一太陽光電能發電系統包含最大功率追蹤器並加入柔性切換之功能於換流器之直流鏈端。由於為了使換流器體積減小，而去提升切換頻率，反而使切換損失及電磁干擾(EMI)增大，故加入柔性切換之技術去達成效率提高之目的。此柔性切換之太陽光電能三相換流器可操作在三種模式下，開迴路模式、獨立運轉模式及市電併聯運轉模式。 柔性切換之技術是採用準共振式直流鏈端(QRDCL)之柔性切換。此柔性切換之太陽光電能三相換流器的三相三臂開關可在零電壓(ZVS)之情形下來做導通，以達到減少切換損失之目的。
並列摘要
Abstract In this paper, using simulation analysis for photovoltaic system, including MPPT tracker and add the function of soft switching in photovoltaic three phase inverter DC-link. In order to reduce the inverter size, try to enhance the switching frequency, but the switching loss and electromagnetic interference (EMI) increased, so using the soft switching to improved and make the efficiency higher. The soft switching of photovoltaic three phase inverter can operate in three modes, the open loop mode, the stand-alone mode and the grid-connected mode. The soft switching technology is using the quasi-resonant DC-link (QRDCL). This soft switching of photovoltaic three phase inverter will allow the three-arm of the switches in the zero voltage switching (ZVS) turn on to achieve the purpose of reducing switching losses.