微型電網運轉與可靠度分析

由於天然資源日益枯竭且京都議定書引起全球對再生能源的重視，在台灣2012年再生能源目標希望占總發電量4%，2020年希望占總發電量18%。儘管再生能源可減少溫室效應，但分散式電源穿透率會改變電力公司運轉方式，其中一個解決方案即是將分散式電源藏於微電網中，使電力系統運轉維持原狀。本文研究台灣首座戶外微型電網測試平台之暫態與動態情形，其總發電量為406.5仟瓦。該微型電網包含氣渦輪機、風力機和太陽能。暫態與動態模擬同時考慮整流器和變流器模型，暫態與動態分析考慮機組故障、風速變化。另外，應用故障模式影響分析法進行可靠度分析。暫態模擬結果顯示，所建立的微型電網經由電源轉換器、葉片俯仰角控制、調速機和激磁機來調節該系統響應；可靠度模擬結果顯示，氣渦輪機加裝電力電子可減少用戶停電時間以及提高系統可靠度。

關鍵字

可靠度；微型電網

並列摘要

Growing depletion of natural resources and the Kyoto Protocol have aroused global attention to renewable energies. In Taiwan, the goal of real power generation from renewable energies is 4% of total generation in 2012 and 18% in 2020. Although renewable energies can mitigate the green gas effect, penetration of these distributed generations may change the operation scheme in the utility. One of the solutions for keeping the power system intact is to embed these distributed generations in micro-grids. This thesis investigates the transient and dynamic conditions for the first outdoor microgrid test bed in Taiwan, whose generation capacity is 406.5-kW. The microgrid system includes gas turbine, wind-turbine and PV generations. The models of rectifier and inverter are considered for both transient and dynamic simulations. The component outage and wind variation are studied in transient/dynamic analyses. This thesis also applies failure mode and effect analysis (FMEA) to analyze the reliability. Preliminary simulation results reveal that the established microgrid can serve as a test bed for investigating the performance of power converter, pitch-angle control, governor, and exciter. The outage time can be reduced and the reliabilities for the system can be improved by including the power electronic devices to the gas turbine.

並列關鍵字

Reliability ； Microgrid

參考文獻

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國際替代計量

微型電網運轉與可靠度分析

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