大型太陽光電站併網-國外案例分析

Abstract

在環境和能源議題的驅動下，各國政府大力推動再生能源政策及相關獎勵措施，使得近年來太陽光電及其它分散式發電系統大幅地成長。如何在可靠及安全的原則下併接大量的太陽光電，是現代電網發展最主要的挑戰。本文首先討論PV併網時對配電系統的衝擊影響，如電壓、逆送電力潮流、過載、系統保護，以及電路配置的相關影響，並探討目前減輕這些影響的相關技術，再者研究發展太陽光電重要的國家中，實際發展PV併網的案例與其所面臨的挑戰，以及分析PV併網的相關標準與規範，最後將「台灣電力股份有限公司再生能源發電系統併聯技術要點」與各國重要再生能源併網標準，作一比較與分析並提出建議。本篇論文研究可以作為發展高占比PV系統的參考，提供因應方法與建議，使PV系統能在安全及可靠的原則下併網；而台灣與各國併網標準的比較與分析，可以提供國內外改善既有併網標準的參考。

Motivated by concerns about the environment and energy shortages, considerable progress has recently been made in the development of photovoltaic (PV) and other forms of distributed generation. These developments have contributed greatly to awareness of the importance of renewable energy and governmental policies to revise energy priorities to ensure the adoption and significant growth of renewable energy. Safely and reliably interconnecting various photovoltaic generators is a major challenge in the development of modern power systems and the interconnection of PVs may have effects that require close attention. In this thesis, firstly, in addition to the PV impacts on the distribution system was be discussed, such as voltage fluctuation, reverse power flow, overload, system protection and circuit configurations, etc. The mitigation technologies for these PV impacts was be studied. Furthermore, research the important countries of developed PV, studying the actual development cases, the challenges as well as the interconnection standards and guidelines for PV. Finally, compare and analysis the grid-connected standards in the world and in Taiwan. This study can be used as a reference for the development of high-proportion PV systems, to provide methods and recommendations to enable interconnect PV under the safety and reliable principle. Otherwise, this investigation of standards serves as a useful reference for improving standards for grid-connected PV generation systems.