【摘 要】
：
为解决同塔双回高压直流输电线路分布参数测量精度问题,建立了同塔双回高压直流线路的分布参数模型,提出了在线路首段分别施加幅值相等、相位互差180度的正序电源测量正序组合(组合1:甲1和甲2短接且乙1和乙2短接;组合2:甲1和乙2短接且乙1和甲2短接;组合3:甲1和乙1短接且甲2和乙2短接)的开路阻抗和短路阻抗;并在线路首段分别施加幅值、相位都相等的零序电源测量零序组合(组合4:甲1、甲2、乙1、乙2
【机 构】
：
华南理工大学电力学院,广州510640;南方电网超高压输电公司检修试验中心 南方电网超高压输电公司
【出 处】
：
中国电机工程学会高电压专业委员会2015年学术年会
论文部分内容阅读
为解决同塔双回高压直流输电线路分布参数测量精度问题,建立了同塔双回高压直流线路的分布参数模型,提出了在线路首段分别施加幅值相等、相位互差180度的正序电源测量正序组合(组合1:甲1和甲2短接且乙1和乙2短接;组合2:甲1和乙2短接且乙1和甲2短接;组合3:甲1和乙1短接且甲2和乙2短接)的开路阻抗和短路阻抗;并在线路首段分别施加幅值、相位都相等的零序电源测量零序组合(组合4:甲1、甲2、乙1、乙2短接)的开路阻抗和短路阻抗,联立求解同塔双回高压直流输电线路单位长度电阻、自电感、自电容、耦合电容、耦合电感.搭建了等效直流输电线路1000km的实验模型,分析了无干扰、50Hz干扰及300Hz干扰下10个不同测试频率的电阻和电感测量结果的最大误差分别为7.3％和1.6％.并将方法应用于牛寨至广东高压直流同塔双回输电线路、牛寨换和从西换流站流站接地极同塔双回接地极线路参数测试,结果表明：牛寨至广东高压直流同塔双回输电线路单根导线的自感、自电容都分别小于线路间互感和互容,线间耦合电容基本相等;牛寨及从西换流站接地极同塔双回线路单根导线的自感大于线路间互感,但单根导线的自电容小于各回导线间的耦合电容.为继电保护的整定、直流系统仿真、行波故障定位等提供可靠的线路分布参数实测数据。
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