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題 名 | 電力饋線諧波之並聯共振 |
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作 者 | 江榮城; 吳士奇; 李榮乾; | 書刊名 | 台電工程月刊 |
卷 期 | 566 1995.10[民84.10] |
頁 次 | 頁55-74 |
分類號 | 448.115 |
關鍵詞 | 諧波; 並聯共振; Harmonics; Parallel resonance; |
語 文 | 中文(Chinese) |
中文摘要 | 近年來由於電力電子技術快速發展,並廣泛應用於工業界,造成非線性 負載日益增加,除產生諧波電流注入電力系統外,系統方可能因與電容性負載發 生並聯共振放大諧波量,使諧波污染更加嚴重,造成電力品質更加惡化。本文首 先探討諧波源之產生及其對電力系統設備之影響,並發展一套電腦諧波軟體,用 以計算電力系統各匯流排之諧波電壓,諧波等效阻抗,諧波電流總失真率(THD)。 其次選擇某一11.4KV供電給兩個高壓高週波鋼鐵廠用戶之用力饋線,利用電腦軟 體將電容性負載分佈分為五種不同之組合模式,分析電容性負載分佈對系統諧波 潮流之影響。 經利用諧波軟體實例分析發現,純諧波源所產生之諧波污染,對設備還不會有立 即之破壞,但如因電容性負載與系統發生並聯共振放大諧波後,電力設備就可能 有立即之破壞。本文提出將電容性負載串接適量之電感器,即可使電容性負載於 各諧波頻率中變成電抗性,因無法與系統發生並聯共振,故可解決上述所提放大 諧波之疑慮。 |
英文摘要 | In recent years, the rapid development of power electronictechnology has been widely applied in the industry; theincreasing use of non-linear load has caused harmoniccurrent to inject into power system. With the use of capacitorsfor power factor correction, the risk of parallel resonance alsoincreased, this has given rise to harmonic pollution whichaffects the quality of the power system. At first, the paper will discuss the generation sources ofharmonic and its effects on equipments of the power system.and develop a set of computerized harmonic analysis softwareto calculate harmonic voltage on each bus, harmonic equivalent impedance and total harmonic distortion (THD). Then, weselect a 11.4KV distribution feeder which supplies power to twohigh voltage steel plant customers, and make use of computersoftware to analyze effects of capacitor loads on the harmonicpower flow. And finally, the suggestion to prevent theoccurence of parallel resonance is also presented. From analysis results of harmonic software we find theharmonic source will not cause immediate damage to theequipments. But if parallel resonance occurs between capacitorload and system, it may damage equipment immediately. |
本系統中英文摘要資訊取自各篇刊載內容。