新型串聯(lián)電弧模型與特性分析
王建鵬,韓浩
(國網(wǎng)山東省電力公司壽光市供電公司,山東 壽光 262700)
摘 要:以電路理論為基礎(chǔ),對RLRh串聯(lián)電路進(jìn)行分析計算,提出一種以電弧電流為輸出的新型電弧數(shù)學(xué)模型。此模型以電弧電阻為變量,將電弧電阻看成時間的周期函數(shù),并對電弧電阻進(jìn)行分區(qū)域處理,給出了各區(qū)域電弧電阻的變化規(guī)律與數(shù)學(xué)表達(dá)式。應(yīng)用新模型進(jìn)行計算,并將計算結(jié)果與Cassie電弧模型和Stokes電弧模型仿真結(jié)果進(jìn)行對比,驗證了新型電弧模型優(yōu)于Cassie電弧模型和Stokes電弧模型,研究可為串聯(lián)故障電弧的診斷提供可靠的理論依據(jù)。
關(guān)鍵詞:電弧模型;電弧電阻;串聯(lián);特性分析
中圖分類號:TM501+.2 文獻(xiàn)標(biāo)識碼:A 文章編號:1007-3175(2017)12-0033-04
New Type of Series Arc Model and Characteristic Analysis
WANG Jian-peng, HAN Hao
(Shouguang City Power Supply Company, State Grid Shandong Electric Power Company, Shouguang 262700, China)
Abstract: Based on the circuit theory, this paper carried out analysis and calculation for the RLRh series circuit and proposed a kind of new type of arc mathematical model with arc current output. This model regarded the arc resistance as the variable, which was the periodic function of time. The arc resistance was carried out regional treatment. This paper gave the variation law and the mathematical expression of each regional resistance. This paper calculated the new type of model and the calculation result was compared with Cassie arc model and Stokes arc model to show excellent agreement. It is verified that the new arc model is better than the Cassie arc model and the Stokes arc model, which provides the reliable theoretical basis for the diagnosis of series fault arc.
Key words: arc model; arc resistance; series circuit; characteristic analysis
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