A Study on High Current Arc Interruption by Multi-Channel Synchronized Diagnosis of Gas Temperature in Circuit Breaker Nozzle.

断路器喷嘴气体温度多通道同步诊断大电流灭弧研究。

• 批准号: 08555068
• 负责人: MATSUMURA Toshiro
• 金额: $ 7.04万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08555068/
• 关键词: Large Current; Current Interruption; Arc Discharge; Thermal Equilibrium; Thermal Plasma; Temperature; Electrical Conductivity; 大電流アーク; 分光; スペクトル; 鉄蒸気; SF_6ガス; 過渡回復電圧

Following results are derived from this research project :(1) Transient axial temperature distributions in a post-arc channel in a flat-type SF_6 gas-blast quenching chamber is estimated from relative intensities of two Fe spectral lines at wavelengths of 426.0 and 442.7 nm by the two-line method. In the practical experiment, iron is intentionally used as the electrode material in a flat-type SF_6 gas-blast quenching chamber. Measurements of radiation intensities of these two Fe spectral lines make it possible to estimate post-arc temperature below 3500 K at 100 mus after current zero in the chamber.(2) A method for estimating X_<Fe> is developed on the basis of spectroscopy, which utilizes the relative radiation intensity of background spectra at 455.0 nm to Fe spectral line at 426.0 nm. From the calculation of the coefficients of the background spectra, it is observed that the background spectra at 455.0 nm have not only continuous contribution but also those of S_2 spectra. It is al … More so found that X_<Fe> is of the order of 0.01% around current zero along the arc axis in the chamber.(3) A new concept of 'thermal plasma contacts' is proposed in order to interpret the behavior of a post-arc channel from the viewpoint of transient axial electrical resistivity distribution in a post-arc channel. The fictitious 'thermal plasma contacts' are found to open in the axial direction during arc quenching period with the velocity exceeds 100 m s^<-1>. Furthermore, behavior of the thermal plasma contacts applied TRV of the order of 2 or 3 V mus^<-1> was discussed to give an interpretation on thermal failure and successful interruption.(4) Particle compositions and electrical conductivity of SF_6 plasmas are calculated considering the non-equilibrium effect, i.e.two-temperature effect. In the calculation of particle compositions, effective excitation temperature is newly proposed in order to express the populations of the internal states of heavy particles in high-pressure and high-gas temperature plasma in two-temperature steady state. The effect of an increase in electron temperature is investigated on the variation in particle composition and electrical conductivity of SF_6 plasmas. Less

（1）利用两条谱线法，根据426.0和442.7nm两条Fe谱线的相对强度，估算了SF_6平吹式气淬灭弧室弧后通道内的瞬态轴向温度分布。在实际实验中，有意地用铁作为平板式SF_6气淬室的电极材料。这两个铁谱线的辐射强度的测量使得有可能估计低于3500 K的弧后温度在100 μ s后，电流在腔室中为零。(2)本文提出了一种基于光谱学的估算X_（？）的方法<Fe>，即利用455.0nm背景光谱与Fe 426.0nm谱线的相对辐射强度。从背景谱系数的计算中发现，455.0nm处的背景谱不仅有连续贡献，而且还有S_2谱的贡献。这是Al ...更多信息 因此发现，X_<Fe>s在腔室中沿沿着电弧轴的电流零点附近为0.01%的量级。(3)提出了一个新的概念，“热等离子体接触”，以解释的行为的弧后通道的瞬态轴向电阻率分布的观点。虚拟的“热等离子体接触”被发现在灭弧期间以超过100 m s^的速度在轴向方向上打开<-1>。此外，热等离子体接触施加TRV的数量级为2或3 V μ s的行为<-1>进行了讨论，给出了热故障和成功中断的解释。(4)本文计算了SF_6等离子体的粒子组成和电导率，并考虑了非平衡效应，即双温效应。在粒子成分计算中，为了表示高压高温等离子体中重粒子在双温稳态下的内态布居，提出了有效激发温度的概念。本文研究了电子温度升高对SF_6等离子体粒子组成和电导率变化的影响。少

项目成果

横水: "大電流SF_6アークにおける放射輸送" 1997年度電気関係学会東海支部連合大会講演論文集. 67. 34- (1997)

横水：“大电流SF_6电弧中的辐射传输”1997年电气协会东海分会会议记录67. 34-（1997）。

Y.Tanaka: "Particle Composition of Two-Temperature SF_6 Plasma in Pressure Range from 0.1 tol MPa" Proc.of 12th Int.Conf.on Gas Discharges and Their Applications. II. 566-569 (1997)

Y.Tanaka：“0.1 至 MPa 压力范围内双温 SF_6 等离子体的颗粒组成”第 12 届气体放电国际会议论文集及其应用。

T.Matsumura, et al.: "Electrical Conductivity and Enthalpy of SF_6 Plasma in two-Temperature State" Proc.of 12th Int.Conf.on Gas Discharges and Their Applications. Vol.I. 94-97 (1997)

T.Matsumura 等人：“两种温度状态下 SF_6 等离子体的电导率和热函”Proc.of 12th Int.Conf.on Gas Discharges and Their Applications。

Y.Tanaka, et al.: "Particle Composition of Two-Temperature SF_6 Plasma in Pressure Range from 0.1 to 1 MPa" Proc.of 12th Int.Conf.on Gas Discharges and Their Applications. Vol.II. 566-569 (1997)

Y.Tanaka 等人：“0.1 至 1 MPa 压力范围内双温 SF_6 等离子体的颗粒组成”第 12 届气体放电国际会议论文集及其应用。

T.Matsumura et al.: "Radiation Power of High Pressure SF_6 Arc Plasma" Proc.of 1st Int.Symp.on Applied Plasma Science. 31-36 (1997)

T.Matsumura 等人：“高压 SF_6 电弧等离子体的辐射功率”Proc.of 1st Int.Symp.on Applied Plasma Science。