低壓微電網保護系統設計

Design of low-voltage microgrid protection system

陳彥霖(Yen-Lin Chen)

指導教授 ： 陳士麟

中原大學/工學院/電機工程研究所/碩士(2012年)

https://doi.org/10.6840/cycu201200647

摘要

近年來各國皆重視分散式電源的發展，並研究如何將分散式電源運用至傳統電力系統中，遂發展出利用分散式電源為主要供電來源的微電網系統(Microgrid)，而微電網系統的保護技術一直存在很多問題與挑戰。
本文針對微電網的故障偵測方法，探討國外論文的優缺點，其中以美國CERTS發展的微電網測試報告最為完整。然其係屬480V單點接地系統，不適用於國內380V多重接地系統。因此，必須設計適用於國內380V多重接地系統的保護策略。
本文針對核研所微電網，提出一套可適用於核研所微電網的故障偵測流程，其位準具有隨時間自動調整之特性，藉此達到微電網保護之可擴充性(Scalability)與可調節性(Adapability)。並針對位準進行靈敏度與信賴度檢測，以確認本故障偵測方法的有效性。

關鍵字

分散式電源 ； 微電網 ； 可擴充性

並列摘要

In recent years, distributed generation has been valued by various countries, and been studied for addition into the traditional power system. Then distributed generation is put into microgrid, which becomes the main source of microgrid's power supply. However, the protection technology of microgrid has faced considerable amount of challenges.
In this article, we will discuss the advantages and disadvantages of the international papers according to the fault detection methods of microgrid. Among the papers, the microgrid test report which was developed in CERTS of United States is the most complete one. However, it belongs to 480V single-point grounding system, not suitable for 380V multiply-grounded system in Taiwan. Therefore, it is necessary to devise a protection strategy, applicable to the 380V multiply-grounded system.
This thesis will propose a process that suits microgrid fault detection of INER (Institute of Nuclear Energy Research), and it has a characteristic that automatically adjusts the fault detection threshold over time to achieve the scalability and adaptability of microgrid protection. The sensitivity and dependability of threshold are evaluated to ensure the effectiveness of proposed fault detection method.

並列關鍵字

Microgrid ； Distributed Generation ； Scalability

參考文獻

[2] D. Coll-Mayor, M. Paget and E. Lightner, "Future Intelligent Power Grids: Analysis of The Vision in The European Union and The United States", Energy Policy, Volume35, Issue 4, April 2007, pp.2453-2465.

[3] E. Sortomme, S. S. Venkata and J. Mitra, “Microgrid Protection Using Communication-assisted Digital Relays” IEEE Transactions on Power Delivery, Vol. 25, No. 4, October 2010.

[4] H. AL-Nasseri, M. A-Redferm and R. O-Gorman, “Protecting Micro-grid Systems containing Solid-State Converter Generation”, IEEE Power Electronics Conference, March 2005.

[8] H. Nikkhajoei and R. H. Lasseter, “Microgrid Protection”, Power Engineering Society General Meeting, Tampa, FL, June 2007, pp.1-6.

參考文獻