- 學位論文
大規模太陽光電併入電力系統之衝擊分析 - 以台灣電壓供電敏感地區與離島地區為例
Impact Analysis of a Large-Scale PV Generation Integration - Case Studies in a Voltage - Sensitive Supply Area and a Remote Island in Taiwan
摘要
近年來，台灣的太陽能發電裝置容量已經大幅成長，因此在大量太陽能發電併入電網後，必須研究其對於既有電力系統的影響。截至2013年底，台灣的太陽光電裝置容量已達到333.4MW，且繼續大幅的增加中。目前台灣最大太陽光電併接個案為中部科學園區內森勁股份有限公司的15MW併接案，而澎湖離島目前是台灣太陽光電發電占比最高的地區。因此，本研究將針對這兩個地區進行系統衝擊分析探討，並進行情境分析，例如將目前的太陽光電容量擴大至10倍以上。本研究採用電荷搜尋法來決定每個選定匯流排所併入的最佳太陽光電裝置容量，主要的目標是藉由併入太陽光電系統可達到最小的傳輸損失以及電壓變化。當求出各併接點的最佳太陽光電容量後，本研究探討新情境下的太陽光電併網衝擊分析。此外，本研究亦將探討太陽光電低電壓穿越技術對於系統暫態穩定度的影響，以了解在大規模太陽光電併入後是否需要要求其具備低電壓穿越的能力，提供給系統操作者參考。
並列摘要
In recent years, solar power installed capacity in Taiwan has grown dramatically. Therefore, after a large amount of solar power is integrated into the grid, the study on the impact of power system is necessary. By the end of 2013, the total solar PV installed capacity in Taiwan has reached up to 333.4MW and continues to increase dramatically. Currently the maximum solar power connection case in Taiwan is 15MW, which was applied by the Sungen Power Corp in Central Taiwan Science Park. Additionally, Penghu Island has the highest penetration of PV power in Taiwan. Therefore, this study will discuss the system impact analyses for the above-mentioned two areas, and implement scenario analysis. For example, the PV capacity is assumed to expand to more than 10 times the current PV capacity and then the impact analysis is carried out. This study adopted the Charged System Search algorithm to determine the optimal PV installed capacity at chosen buses. Its main target is to achieve the minimum transmission loss and voltage variation by interconnecting PV systems. After obtaining the optimal PV capacity at each interconnecting point, the system impact analysis is then implemented for the new system condition with a larger PV capacity. Furthermore, this research also discusses the effect of PV low-voltage-ride-through (LVRT) capability on the system transient stability in order to investigate whether the PV needs to install LVRT function and provide the information to the system operator.