双回并行直流输电谐波不稳定判据研究及改进
发布时间:2018-07-23 10:33
【摘要】:现代电网往往是大规模的交直流混联系统,当直流系统与弱交流系统连接时,可能引发谐波不稳定等一系列问题。在现有双回并行直流输电线路谐波不稳定判据的基础上,引入了直流偏磁系数和双回直流线路的阻抗矢量差异,提出新的判断双回直流系统谐波不稳定的工程判据。在不同网络参数下,将所提判据与现有判据的判断结果进行对比分析,结果证明了所提判据的正确性。
[Abstract]:Modern power grid is often a large-scale AC / DC hybrid system. When the DC system is connected with the weak AC system, it may lead to a series of problems such as harmonic instability. Based on the existing criterion of harmonic instability of double-circuit parallel HVDC transmission line, the difference of DC bias magnetic coefficient and impedance vector of double-circuit DC transmission line is introduced, and a new engineering criterion for judging harmonic instability of double-circuit DC system is proposed. Under different network parameters, the proposed criteria are compared with the existing criteria, and the results show that the proposed criteria are correct.
【作者单位】: 四川大学电气信息学院;国网智能电网研究院;
【基金】:国家电网公司科技项目(SGRIDL7114006)~~
【分类号】:TM721.1
本文编号:2139111
[Abstract]:Modern power grid is often a large-scale AC / DC hybrid system. When the DC system is connected with the weak AC system, it may lead to a series of problems such as harmonic instability. Based on the existing criterion of harmonic instability of double-circuit parallel HVDC transmission line, the difference of DC bias magnetic coefficient and impedance vector of double-circuit DC transmission line is introduced, and a new engineering criterion for judging harmonic instability of double-circuit DC system is proposed. Under different network parameters, the proposed criteria are compared with the existing criteria, and the results show that the proposed criteria are correct.
【作者单位】: 四川大学电气信息学院;国网智能电网研究院;
【基金】:国家电网公司科技项目(SGRIDL7114006)~~
【分类号】:TM721.1
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