Optimal Operation Strategy and Economic Analysis in Isolated Power Systems with Large Integration of Wind Capacity

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Project title

Code/計畫編號

NSC100-2221-E019-001

Translated Name/計畫中文名

高占比風力發電之相關研究-子計畫三：孤立電力系統併入大量風力發電容量之最佳操作策略與投資效益評估

Project Coordinator/計畫主持人

Chun-Lung Chen

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

李聰穎

Department/Unit

Department of Marine Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=2344816

Year

2011

Start date/計畫起

01-08-2011

Expected Completion/計畫迄

31-07-2012

Bugetid/研究經費

462千元

ResearchField/研究領域

電子電機工程
能源工程
資訊科學--軟體

"環保意識的逐漸高漲與傳統石化能源的即將耗竭，促使電力系統有極高的興趣倂入再生能源。在考量能源使用的多元化，台灣政府當局已經下令再生能源的研究與發展，因此許多以再生能源為基礎之混合型發電系統已經受到廣泛的注意與應用，且進行大規模的實際安裝與測試。近年來由於風力機組建置成本的快速下降，促使台灣在風況不錯的地區興建風機可以達到既經濟又環保的效益。然而當孤立電力系統併入大量的風力能源時，由於風力發電輸出的不確定性，將增加系統操作者與規劃者的負擔，為了適應電力系統加入風力發電的新環境，提升孤立系統應付緊急事故的能力，許多關鍵議題必須深入探討與分析，其中一項相當重要且極具挑戰性的問題即是如何有效地管理多區域系統風能輸出發電量的變動性，另一項重要議題則是如何評估風機併入系統所帶來的衝擊與效益，因此風機併入電力系統之關鍵議題將演變為風力發電之不確定性及高變動性是如何影響著每日之操作策略與其對應之操作成本。當孤立電力系統併入大量的風力發電時，由於風力發電輸出的不確定性，調度與規劃的觀念需要重新檢討，以發展一套革新的能源管理系統。這套系統主要特點包含有負載預測模組、再生能源預測模組、機組預定排程模組、經濟調度模組與線上動態安全評估及監控的能力，並將其整合到一個友善的人機介面環境，以利操作人員運作。其中發展一套經濟、安全及可靠的「資源排程」模組乃是整個革新能源管理系統中相當重要的操作問題。本研究計畫之目的擬提出機組排程的革新架構，期能一併解決各區域備轉容量分配、區域間壅塞管理及風力發電不確定性的問題，進而探討蓄電池儲能系統與風火力發電系統之間的協調問題，以改善孤立電力系統運轉的效率與可靠，最後藉由本計畫所開發的軟體分析工具可用來評估風機併入系統所帶來的衝擊與效益，協助系統規劃者用以瞭解風力發電變動對系統操作成本所造成的影響，進一步作為風力發電系統績效衡量以及投資效益評估的基本分析工具。實例模擬結果可提供孤立澎湖電力系統及台電系統運轉與規劃的參考。"
"The rise of environmental protection and the progressive exhaustion of traditional fossil energy sources have increased the interests in integrating renewable energy sources into existing power systems. The government in Taiwan has commissioned research on renewable energy applications under the consideration of diversifying energy sources. Various renewable energy based hybrid power systems have received widespread attentions and applications, and are widely in stalled or undergoing testing in the whole world. Since the cost of wind turbine generators (WTGs) has been reduced rapidly, installation of WTGs as fuel savers is economically and environmentally attractive in windy regions. However, it is widely believed that large wind penetrations would put an increased burden on system operations due to the uncertain nature of wind power. One of the most important future challenges seems to be the management of the integration of fluctuations in the electricity production from wind energy sources. Another important issue regarding the integration of wind generation energy into an isolated system is to assess the impact and economic benefits of the installation of wind farms. The key integration question then becomes how variations in wind plant outputs affect the operation of the isolated system on a day-to-day basis and what the associated costs are. As more WTGs are connected to utility systems, development of an innovative energy management system (EMS) is necessary to determine the optimal proportion of wind generator capacity that can be integrated into the system for operating an isolated hybrid power system reliably and efficiently. The main features of the EMS comprise advanced software modules for load & renewable power forecasting, unit commitment (UC), economic dispatch (ED) and on-line security assessment capabilities integrated in a friendly Man-Machine environment. It can be observed that the UC module is an important operational problem in a modern EMS. The goal in this research is to develop a new model for generation scheduling to cover the unpredictable wind generator output variations in a multi-area power system. Several key issues of wind-battery coordination in a power system are investigated and discussed in this research for achieving optimal utilization of wind energy sources in the existing isolated system. The developed UC software is a useful tool for the system planner to understand the wind generator output variations in system operating cost analysis and to assess the impact and economic benefits of the installation of wind farms. Numerical experiments are included to provide valuable information for both operational and planning problems in an isolated power system, such as Taiwan power system."

Keyword(s)

機組排程
風力發電系統
蓄電池儲能系統
增強型動態規劃法
擴展型直接搜尋法
unit commitment
wind energy system
battery energy storage system
improved dynamic programming
enhanced direct search method

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Optimal Operation Strategy and Economic Analysis in Isolated Power Systems with Large Integration of Wind Capacity

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