應用累積元方法求解間歇性負載引起之電壓變動

Application of Cumulant Method to Solve Voltage Fluctuation Caused by Intermittent Loads

王俊傑(Jun-Jie Wang)

指導教授 ： 洪穎怡

中原大學/工學院/電機工程研究所/碩士(2002年)

https://doi.org/10.6840/cycu200200267

摘要

工廠中大型間歇性負載運轉時所產生的電壓變動是污染電力品質的主要原因之一，因此瞭解間歇性負載的工作特性以及電壓變動對電力系統的影響，就特別值得重視與探討研究。

本論文首先探討研究電壓變動的各種現象，進而蒐集並整理各種間歇性負載，瞭解各種間歇性負載的工作原理以及間歇性所造成的電壓變動對用電設備儀器所造成的影響，由於各種設備儀器對於電壓變動的容忍度都不盡相同，因此有不同的法規來規範設備儀器的電壓變動的範圍，本論文對於一些較常用的電壓變動法規有詳盡的說明。

本論文利用隨機變數的統計概念配合累積元方法來求得間歇性負載工作時造成的電壓變動，透過數學方式求得系統匯流排之電壓變動範圍以及發生機率，此方法可以減少計算時間且快速地求出電力系統的電壓變動範圍，本論文透過三個系統模擬分析試算，証實本文所提方法之可行性。

關鍵詞：間歇性負載、電壓變動、隨機變數、累積元。

關鍵字

累積元 ； 間歇性負載 ； 隨機變數 ； 電壓變動

並列摘要

Voltage fluctuation resulting form large intermittent loads in the factory are shown to have a greater impact on the power quality. The investigation of the operation characteristics for the intermittent loads and the impact of the voltage fluctuation on the power system are therefore very important.

First, this thesis discusses the phenomena of the voltage fluctuation. Then different intermittent loads are examined for understanding the planning theorem and the impact of instrument due to voltage fluctuation. The equipment tolerances subject to voltage fluctuation are different. Because the problems of voltage fluctuation exist in the power system, many voltage fluctuation standards will be described in this thesis.

This thesis uses the concept of random variables and cumulant method to solve voltage fluctuation resulting form large intermittent loads. The range of voltage fluctuation and probability can be obtained. The computation complexity can be simplified and the computation time can be markedly reduced by the proposed method. The simulation results based on three systems show the applicability of the proposed method.

keyword：intermittent load, voltage fluctuation, random variables, cumulant.

並列關鍵字

cumulant ； random variables ； voltage fluctuation ； intermittent load

參考文獻

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