CAJ | 학술논문

潜供电弧自熄特性影响输电线路的单相重合闸时间,对提高系统的输送容量和可靠性至关重要。基于经典的Mayr电弧模型,采用非线性时变电阻描述弧道特性,建立了弧阻方程,分析潜供电弧的运动特性,获得电弧实时长度以迭代计算弧道电阻,根据能量守恒原则提出了判断电弧是否自熄的弧阻判据。给出了输电线路潜供电弧的计算电路,进而阐明了计算电弧自熄特性的仿真流程。利用长间隙小电流电弧试验数据,对潜供电弧仿真模型的待求变量进行参数估计,编制了实用仿真程序,计算了电流、电压、弧阻和燃弧时间等电弧特性,与试验结果进行了对比分析。结果表明,潜供电弧电位梯度为1 500～2 000V/m,计算结果与电弧试验波形接近,燃弧时间的计算误差在工程允许误差范围内,提出的潜供电弧仿真模型及计算方法合理可行。
잠공전호자식특성영향수전선로적단상중합갑시간,대제고계통적수송용량화가고성지관중요。기우경전적Mayr전호모형,채용비선성시변전조묘술호도특성,건립료호조방정,분석잠공전호적운동특성,획득전호실시장도이질대계산호도전조,근거능량수항원칙제출료판단전호시부자식적호조판거。급출료수전선로잠공전호적계산전로,진이천명료계산전호자식특성적방진류정。이용장간극소전류전호시험수거,대잠공전호방진모형적대구변량진행삼수고계,편제료실용방진정서,계산료전류、전압、호조화연호시간등전호특성,여시험결과진행료대비분석。결과표명,잠공전호전위제도위1 500～2 000V/m,계산결과여전호시험파형접근,연호시간적계산오차재공정윤허오차범위내,제출적잠공전호방진모형급계산방법합리가행。
The self-extinguishing behavior of secondary arcs affects the single-phase re-closure time of transmission lines,so it is important to improve the power system's transmission capacity and reliability.Based on the classic Mayr arc model,the non-linear time-varying arc resistance was introduced to describe the condition of an arc channel,and the arc resistance equations were established.By analyzing the movement characteristics of the secondary arc,the arc's real time length was obtained to iteratively compute the arc resistance.Then an arc resistance criterion was proposed to judge whether arc extinguishes by itself or not according to the law of energy conservation.The equivalent circuit of the arc resistance connected with the system circuit was also put forward to calculate the arc characteristics,and the simulation flow for the self-extinguishing behavior of the secondary arc was further expressed in detail.With the arcing test data at low currents,the parameter estimation was performed for this arc model,and some waveforms of arc voltage,current,resistance and arcing duration were obtained.According to the obtained results,the potential gradient of secondary arc is in a range of 1 500~2 000 V/m.The calculation waveforms are close to the test results,and the arcing duration error is within the permission error of engineering.It is concluded that the presented secondary arc model and its simulation method are reasonable and practicable.