基于直流电流变化量预测的后续换相失败抑制策略
摘要：针对换相失败恢复过程中直流电流预测难度大的问题，首先对直流线路的等效模型进行分析，建立整流侧直流电压与逆变侧各电气量之间的定量关系，结合直流控制分析提出一种可准确预测直流电流变化量的方法。其次，基于最小关断面积判别与直流电流变化量的预测方法，构建后续换相失败风险评估模型，并根据风险评估结果实现对触发角的定量控制，从而抑制后续换相失败的发生。以PSCAD/EMTDC平台中的国际大电网会议(conseil international des grands reseaux elecctriques，CIGRE)标准模型为测试系统，不同故障类型、严重程度及故障持续时间下的仿真结果验证了所提直流电流预测、后续换相失败风险评估的准确性和后续换相失败抑制策略的有效性。
Abstract:In allusion to the difficulty of DC current prediction in the process of commutation failure recovery, firstly, the equivalent model of DC line was analyzed, the quantitative relationship between DC voltage on the rectifier side and the electrical quantity on the inverter side was established, and a method that can accurately predict the DC current change was proposed based on DC control analysis. Secondly, based on the prediction method of minimum off-area discrimination and DC current change, a subsequent commutation failure risk assessment model was constructed, and the trigger angle was quantitatively controlled according to the risk assessment results to suppress the occurrence of subsequent commutation failure. Taking the standard model of conseil international des grands reseaux elecctriques (CIGRE) in the PSCAD/EMTDC platform as the test system, the simulation results under different fault types, severity and duration verify the accuracy of the proposed DC current prediction, subsequent commutation failure risk assessment and the effectiveness of the subsequent commutation failure suppression strategy.
标题：基于直流电流变化量预测的后续换相失败抑制策略
英文标题：Subsequent Commutation Failure Suppression Strategy Based on DC Current Change Prediction
作者：闫晓虎, 李凤婷, 尹纯亚, 刘江山,
关键词：高压直流输电, 换相面积法, 故障恢复过程, 直流电流变化量, 后续换相失败抑制, CIGRE标准模型,
发表日期：2025-02-10
- 文件大小:
- 4.06 MB
- 下载次数:
- 60
-
高速下载
|
|
