微電網系統保護協調分析

Protection Coordination of MicroGrid

羅文聰(Wen Tsung-Lo)

指導教授 ： 陳士麟

中原大學/工學院/電機工程研究所/碩士(2010年)

https://doi.org/10.6840/cycu201000675

摘要

為提高分散式電源及再生能源的佔比，國內外正積極發展微電網。微電網不同於傳統電力系統，前者的主要電源係採用分散式控制，根據不同用戶的需求，以多樣性的再生能源組合供電；後者主要係採用傳統的大型發電廠供電，經由輸、配電提供用戶用電。配電系統中，微電網可由市電提供電源，亦可由電網內的分散式電源供電，稱為市電併聯模式。當微電網發生外部故障時，微電網可與市電切離，利用電網內的分散式電源獨立供電，此稱為孤島運轉模式，電網內的用戶可不受市電擾動影響。
本論文概分為兩個部份，第一部份為比較美國CERTS提出的微電網測試報告，探討與國內常用的多重接地系統的適用性。第二部份根據國內核能研究所建置的微電網特性，探討該電網在市電併聯模式及孤島運轉模式時，微電網的故障特性及保護協調設定。並提出適用於國內220V/380V系統及120V/208V系統的故障偵測方法。所提出的偵測方法有助於微電網系統保護協調之規劃、分析，有利於未來微電網的建置及發展。

關鍵字

孤島運轉 ； 市電併聯 ； 微電網 ； 保護協調

並列摘要

The design of Microgrid is different from the design of a traditional power system. Microgrid adopts a combination of various reliably renewable resources to provide power energy and uses distributed control to meet varied demands. It is quite different from the one as in central control that is utilized in the traditional power system.
Microgrid is a revolutionary concept and new vision for power system development. The loads in a Microgrid, other than the power transmitted from a power utility, they can also be power supplied from a distributed generator located nearby, called grid connected mode. When a contingency occurs in power utility’s line, Microgrid can turn into island mode which is isolated from utility’s grid. Microgrid can provide electricity customers a stable and continuous power supply without outage disturbance.
This paper divides into two parts generally, the first part to compare the Microgrid test report which CERTS proposed with domestic commonly used multiple grounding system. The second partial basis the of Institute of Nuclear Energy Research (INER), discuss the fault characteristic and protection coordination when Microgrid operated in Grid-Connected mode and Island mode, proposed the suitable fault detection method in the 220V/380V system and the 120V/208V system. It can be a useful tool in designing and developing Microgrid.

並列關鍵字

Protection Coordination ； Island ； Microgrid ； Grid-Connected

參考文獻

[2] B. Kroposki, T. Basso, R. DeBlasio, “Microgrid Standards and Technologies“, Power and Energy Society General Meeting, pp. 1-4, July 2008.

[3] G. Venkataramanan, C. Marnay, A larger role for microgrids,Power and Energy Magazine, Volume 6, pp. 78-82, May-June 2008.

[6] CERTS Microgrid Test Bed, http://certs.aeptechlab.com/

[8] H. Nikkhajoei and R. H. Lasseter, “Distributed Generation Interface to the CERTS MicroGrid”, IEEE Power Delivery Transactions, July 2009.

[9] R. H. Lasseter, “Microgrids,” Power Engineering Society Winter Meeting, pp. 305-308, Jan, 2002.