太陽光電(photovoltaics, PV)系統已成為具備可行性的再生能源發電系統，產業估算太陽光電系統的使用壽命約略20~30年，唯其長期可靠度為重要因素，因此，在太陽能發電之混合再生能源系統中，在發電元件如何確認太陽光電系統維持良好發電，希望以電致發光(electroluminecence, EL)影像技術做為元件級的電池、PV模組、系統串列共通檢測方法，精確量測系統串列的模組區域發電特性，以及能源系統如何充分使用太陽光電電力，讓過剩電量比例限制在3%以下，這兩點是混合太陽能發電之再生能源系統至關重要的問題。
近年PV系統與儲能系統(BESS)成本不斷的下降，於電錶前(front-the-meter, FTM)與電錶後(behind-the-meter, BTM)之應用模式日益廣泛與成熟，PV/BESS應用於電錶後市場BTM)持續快速成長，對BTM應用PV/BESS的經濟效益分析說明，搭配用戶進行時間電價(time of use rates, TOU)的充放電排程控制，可有效減少用電戶的電費支出，另一方面，負載優先使用PV系統產生的電力，以減少外購電力的需求。
本論文採用HOMER模擬提出PV/BESS應用於BTM的經濟效益分析方法，考慮再生能源的有效利用，限制PV過剩電量的一種分析方法，從模擬結果中決定出滿足過剩電量限制的解（本研究中過剩電量設為3%），找出滿足過剩電量限制的解，決定出不同比例再生能源條件下之PV/BESS解決方案，綜合考量各種契約容量設計方案，提供電力用戶評估和選擇系統方案。在台灣再生能源發展條例政策環境下，以PV/BESS混合再生能源系統規劃進行工業用電戶契約容量調整方案分析，提供政策與再生能源技術之調整分析方法，做為工業用電的精進改善措施。

The photovoltaic (PV) system has become a potential power generation system of renewable energy. The industry estimates that the service life of the photovoltaic system is about 20 to 30 years, but its long-term reliability is an mportant issue to ensure the PV system well in the hybrid renewable energy system. The electroluminescence imaging technology plays key role as a common detection method for the solar cell, module, and system. In recent years, the cost of PV systems and energy storage systems (BESS) has continued to decline, and the application modes of front-the-meter (FTM) and behind-the-meter (BTM) have become increasingly widespread and mature. The BTM market continues to grow rapidly for PV/BESS application. The economic benefit analysis of the application of PV/BESS to BTM shows that it is used with users to perform time of use rates (TOU) charging and discharging schedules. The control plan can effectively reduce the electricity expense of users. On the other hand, the load demand is the priority to use the electricity generated by the PV system to reduce the electricityd demand for purchased electricity.
This paper uses HOMER simulation to propose a method for analyzing the economic benefits of PV/BESS applied to BTM, considering the effective use of renewable energy and an analysis method to limit the excess power of PV. From the simulation results, the excess electricity fraction is limited to 3% to a novel precise analysis and effective use of energy for the economic benefit evaluation of PV/BESS. Under the condition that the electricity demand is met and the PV power generation is fully used, the aim is to find the most economical PV/BESS capacity allocation and optimal contract capacity scheme. Under the policy environment of Taiwan's Renewable Energy Development Regulations, the PV/BESS hybrid renewable energy system planning is used to analyze the contract capacity adjustment plan for industrial electricity users. The optimal scheme provides adjustment and analysis methods by considering the policies and renewable energy technologies, as a refined improvement for industrial electricity demand.

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