特高压换流变压器阀侧出线装置直流电场计算与分析  

Calculation and Analysis of DC Electric Field in Valve-side Outlet Device of UHV Converter Transformer

作　　者：张启民 张良县[3] 陈模生[3] 

机构地区：[1]西安西电变压器有限责任公司,西安710077 [2]辽宁兴启电工绝缘材料有限责任公司,辽宁辽阳111000 [3]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《高压电器》2014年第9期66-70,75,共6页High Voltage Apparatus

摘　　要：换流变压器的阀侧出线装置是换流变压器内部最复杂,同时也是最重要的绝缘结构之一。在运行时,它不仅要耐受交流电压,而且也要耐受直流电压。在直流稳态下,阀侧出线装置的电场分布取决于材料的电阻率。变压器油和绝缘纸板的电阻率与电场强度有关,表现为非线性;绝缘纸板在层压及垂直层压方向的电阻率有很大的不同,表现为各向异性。笔者对换流变压器的阀侧出线装置的非线性、各向异性直流电场进行计算,并将计算结果与线性、各向同性模型及线性、各向异性模型的结果进行对比。对比结果表明:在对换流变压器阀侧出线装置的直流电场进行分析、校核时需要同时考虑油纸绝缘的非线性及各向异性。The valve-side outlet device is one of the most complicated and important insulation structures in a converter transformer. It withstands both AC voltage and DC voltage during operation stage. The electric field distribution in the device depends on the resistivity of insulation material under DC steady voltage. The resistivity of oil and pressboard is affected by electric field strength,showing nonlinear phenomena. The resistivity along and vertical to the layer of pressboard is quite different, showing anisotropic phenomenon. In this paper,the nonlinear and anisotropic DC electric field distribution in the valve-side outlet device is calculated and compared with the results of linear isotropic model and linear anisotropic model. Comparison reveals that both anisotropic and nonlinear characteristics should be taken into account in analysis and verification of DC electric field in the valveside outlet device.

关 键 词：非线性与各向异性 阀侧出线装置 直流电场分布 换流变压器 

分 类 号：TM42[电气工程—电器]