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工業技術研究院

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技術名稱: 部份遮蔭情況下之大功率追蹤控制技術

技術簡介

太陽光電發電系統經常發生部分遮蔽情形,而遮蔽情形會使得功率-電壓特性曲線出現多個峰值的現象,因此開發全域最大功率追蹤演算法是很重要的。本技術提出一新型兩階段全域最大功率追蹤演算法,在第一階段,本技術針對現有市售之太陽光電電池模組進行廣泛的模擬,開發分段搜尋規則;第二階段,本技術提出一新型變動步階擾動觀察法增加搜尋全域最大功率點的速度。此方法具有架構簡單、高追蹤速度、提高追蹤精確度、改善成功追蹤到全域最大功率點的機率以及容易與原本的太陽光電發電系統韌體架構整合等優點。

Abstract

Photovoltaic generation systems (PGSs) frequently experience partially shaded conditions (PSCs). Because PSC creates several peak values on the power-to-voltage characteristic curve, developing an algorithm that facilitates tracking global maximum power point (GMPP) is crucial. Therefore, this study introduced a two-stage GMPP tracking algorithm. In the first stage, this technical developed the segmentation rules after performing extensive simulations on existing products. During the second stage, this study proposed a novel variable step-size perturb and observe method to increase the speed of searching for GMPP. The presented method feature advantages, such as simple structures, high tracking speeds, enhanced tracking accuracy, improved success rate, and easy integration with original PGS firmware.

技術規格

適用於太陽光電系統受部分遮蔽之全域最大功率控制方法

Technical Specification

Global maximum power point tracking control method for PV systems operating under partially shaded conditions

技術特色

太陽光電組列受到部分遮蔽的狀況下,往往導致系統的不匹配並直接對發電量造成影響,但因為影響系統發電量的因素眾多,所以實際影響程度很難透過簡單的計算公式獲得;這些因素包括太陽光電模組間的串/並聯方式以及各個太陽光電模組實際接收到的太陽光照度。不同的部份遮蔽樣式所造成之功率-電壓特性曲線也不同,即使系統串並聯組態沒有改變,隨著部分遮蔽樣式的不同,所產生的功率-電壓曲線也不相同。因此本技術適用於太陽光電組列受部分遮蔽狀況下之太陽光電最大功率追蹤控制法,藉以提升太陽光電組列在有/無遮蔽時之發電效率。

應用範圍

太陽光電系統、電源轉換控制器

接受技術者具備基礎建議(設備)

從事太陽光電系統業者、電力電子相關業者

接受技術者具備基礎建議(專業)

具備電源轉換電路設計與程式撰寫能力

技術分類 02 R太陽光電技術

聯絡資訊

聯絡人:林福銘 太陽光電技術組

電話:06-3636800 或 Email:fminglin@itri.org.tw

客服專線:+886-800-45-8899

傳真:

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