台北捷運文湖線轉供下系統保護協調與絕緣協調之研究

Study on Relay and Insulation Coordinations for Wen-Hu Line of Taipei Metro under Load Transfer Conditions

吳啟華(Chi-Hua Wu)

指導教授 ： 陳士麟

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/cycu201500783

摘要

台北捷運公司為提高捷運供電系統可靠度，擬將文湖線主變電站之可靠度由原來的N-1設計水準（指文山線或內湖線各允許一座主變電站故障而由線內的另一座主變電站轉供），提昇至N-2設計水準（指文山線的兩座主變電站故障而由內湖線轉供；或內湖線的兩座主變電站故障而由文山線轉供）。本論文針對此尚在發展中的文山/內湖兩線相互轉供之情況，由保護協調與絕緣協調兩個領域探討此文山/內湖線相互轉供之潛在風險。
本研究概分為兩部分，第一部分為文山/內湖兩線相互轉供下的保護協調分析；第二部分為兩線相互轉供下的絕緣協調分析。保護協調的部分，係根據文湖線現行的22kV系統方向性過流電驛參數，計算在轉供情況下22kV系統的方向性過流電驛是否具備正確的跳脫順序以及是否具有充裕的保護協調時間間隔；在絕緣協調的部分，係以ATP電磁暫態模擬軟體建立文山或內湖線的電磁暫態模型，模擬轉供情境下開關突波對於22kV系統設備的影響，據之檢討設備的開關突波耐壓絕緣等級與保護裕度。本研究並根據計算與模擬分析結果，檢討現行系統待改善之處，並提出可行之改善建議。

關鍵字

文湖線 ； 轉供 ； 保護協調 ； 絕緣協調

並列摘要

The Taipei Rapid Transit Corporation (TRTC) is going to upgrade the power supply reliability by upgrading from the originally N-1 design criterion to N-2. The former refers to the power system design which allows the outage of one 161kV Bulk Supply Substation (BSS) and the latter allows the simultaneous outage of two BSS’s in the same Wen-shan or Nei-hu Line. That is, under the outage of two BSS’s in the Wen-shan Line, the closest BSS of Nei-hu Line must be able to supply power to Wen-shan, and vice versa for the outage of Nei-hu and the power supply from Wen-shan. This thesis focuses on relay coordination and the insulation coordination of the 22kV power system under the aforementioned load transfer between Wen-shan and Nei-hu Lines due to the N-2 conditions.
The thesis is comprised of two parts. The first part presents the relay coordination calculation results, where the present settings on the directional overcurrent relays for the 22kV power system protection are evaluated under the N-2 load transfer condition, which includes the evaluation on the tripping sequence and on the coordinating time intervals of relays. The second part presents the insulation coordination results by constructing the electro-magnetic transient simulation model for the 22kV power system under the N-2 load transfer condition, and by evaluating the switching surge impact on the 22kV power system equipments, which includes the evaluation on the BSL (Basic Switching Surge Insulation Level) and on the overvoltage protection tolerance of the 22kV system equipments.
Both evaluations point out the limitations of 22kV power systems presently existing in the Wen-hu Line on their overcurrent and overvoltage protections, and make suggestions on the counter measures.

並列關鍵字

Wen-hu Line ； Load Transfer ； Relay Coordination ； Insulation Coordination

參考文獻

[2] 楊文奇，22.8kV架空線絕緣協調與保護協調之模擬，中原大學電機系碩士論文，民國103年7月。

[3] 郭文豪，離島電力系統保護協調研究，中原大學電機系碩士論文，民國97年7月。

[11] 陳政廷，科學園區超高壓變電所雷擊及開關突波特性及其影響研究，臺北科技大學電機系碩士論文，民國101年6月。

[4] MiCOM P12x Manual (global file) P12x/EN T/Fc6, Version 1.0, Schneider Electric, 2013.

[5] MiCOM P12y Manuel (fichier global) P12Y/FR M/E95, Version 1.0, Schneider Electric, 2011.