獨立運轉型微電網保護技術之研究

The Study on Islanding Microgrid Protection

黃智彥(Shi-Ian Huang)

指導教授 ： 許世哲

中原大學/電機資訊學院/電機工程研究所/碩士(2015年)

https://doi.org/10.6840/cycu201500573

摘要

隨著全球天氣暖化等很多環保意識抬頭，綠色能源開始崛起，世界各國更加重視分散式電源的應用，微電網的構想順勢而起。微電網有別於傳統的電網，可依據不同的用戶需求，提供多樣性的組合供電。微電網的研究及建置，已出現蓬勃發展的趨勢。
一個微電網的組成必須要有負載、分散式電源及儲能設備等。透過控制及電力電子技術，能達到與市電連結或孤島運轉供電。微電網具備可提高特定用戶供電可靠度及供電品質，可降低輸電損失並在發生災變時可緊急供電等功能。
微電網的保護策略，是建置及推廣微電網的重要研究議題之一，目前雖然尚未見完善及符合經濟效益的方案，然而已有眾多文獻加以探討。本論文針對微電網故障保護，提出一套適用的非通訊式保護策略，根據核能研究所微電網故障電流特性判斷是否發生故障，並依據功率流向及時間延遲達成保護協調目的。
本論文所提出的保護策略相較於採用差動方式或運用通訊系統進行保護等方法，其建置成本較低而可靠度較高，十分適合應用於獨立運轉型微電網，對於微電網的推廣有一定的助益。

關鍵字

微電網 ； 分散式電源 ； 孤島運轉 ； 保護策略

並列摘要

Green energy emerged from the concern of global warming and the awareness of the environmental protection. Countries around the world pay more attention to the applications of distributed generation. The conception of microgrid also emerged from it. Unlike traditional grid, microgrid can combine diversity power to provide the electricity in accordance with different requirements of customers. The trend of the research and implement of microgrid is booming.
Microgrid which consists of distributed generations, energy storages and loads can operate under grid-connected or islanding mode through proper control methodologies and power electronic technologies. Microgrid can increase the penetration of renewable energy, enhance the reliability and power quality of customer, reduce transmission losses and provide emergency power.
Microgrid protection strategy is one of the critical issues of its research and development. Although an ideal and cost-effective solution is yet to see at present, however, numerous literatures have explored the possibilities. This thesis focuses on microgrid protection strategy. A proper non- messaging protection methodology is designed. The determination of fault event according to the fault current characteristics measured from INER (Institute of Nuclear Energy Research) microgrid test bed is developed. Instantaneous power flow and time delay technique are used to achieve protection coordination.
The protection strategy proposed in this thesis provides a lower implementation costs and higher reliability than the protection strategies which use differential protection methodology and messaging protection methodology. This protection methodology which is suitable for an islanding microgrid, gives the advantages for the promotion of microgrid.

並列關鍵字

Microgrid ； Distributed Generation ； Islanding Mode ； Protection Strategy

參考文獻

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