| 引用本文: | 王亚涛,吴彦维,李俊霞,李乾,曹森.HVDC中直流线路的互感机理及其对控制系统影响的研究[J].电力系统保护与控制,2015,43(12):28-33.[点击复制] |
| WANG Yatao,WU Yanwei,LI Junxia,LI Qian,CAO Sen.Mechanism of DC transmission line's mutual inductance in HVDC and its effect on the control system[J].Power System Protection and Control,2015,43(12):28-33[点击复制] |
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| 摘要: |
| 针对特高压直流输电工程中两极直流线路间的影响，应用线路间互感原理，对高压直流输电线路电磁耦合机理和扰动特征进行了深入的研究。从理论上计算了宾金直流输电工程两直流线路间存在较大的电磁耦合分量。通过RTDS建立的仿真模型，研究了一极线路故障时去游离时间长短、两极线路间距大小和一极电流升降速率大小对另一运行极控制系统的影响，结合现场实际线路故障的波形对宾金直流控制策略提出了优化方案。通过RTDS仿真验证了优化后的控制策略能在一极发生线路故障时对非故障极的影响降低到最小，有效地防止了双极闭锁，对于电网的可靠安全运行具有重大意义。 |
| 关键词: 高压直流输电 直流闭锁 控制策略 直流线路故障 电磁耦合 RTDS仿真 |
| DOI：10.7667/j.issn.1674-3415.2015.12.005 |
| 投稿时间：2014-09-15修订日期：2015-01-10 |
| 基金项目: |
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| Mechanism of DC transmission line's mutual inductance in HVDC and its effect on the control system |
| WANG Yatao,WU Yanwei,LI Junxia,LI Qian,CAO Sen |
| (XJ Electric Co., Ltd., Xuchang 461000, China) |
| Abstract: |
| In view of the influence of DC circuit of HVDC transmission between two poles, the principle of mutual inductance between the lines is applied, the electromagnetic coupling mechanism of high voltage DC transmission line and disturbance characteristics are studied, the electromagnetic coupling component of two DC line Binjin HVDC is calculated. The simulation model is established by RTDS, the time of dissociation in line failure, the distance between lines and the current fluctuation rate, which has an effect on control system is studied. Combined with the actual line fault waveform, optimization solution of Binjin DC is proposed. The optimized control strategy can reduce the effects of the non-fault pole to the minimum when restarting, which is verified by the RTDS simulation. The bipolar blocking is prevented effectively, which is of great significance on the safety and reliability in the operation of the power grid. |
| Key words: HVDC DC block control strategy DCLF electromagnetic coupling RTDS |
