多直流附加阻尼控制的控制敏感点挖掘

发布时间：2018-06-24 08:20

本文选题：直流输电 + 低频振荡　；参考：《电力自动化设备》2014年07期

【摘要】：直流附加控制是HVDC系统抑制低频振荡的有效措施,但是在多直流HVDC系统中不同的直流点加装附加控制所取得的效果和花费的代价不同。提出以达到相同阻尼效果时所需直流调制输出量最小(或单位调制量下阻尼最大)为目标来选择加装附加控制的直流点。基于线性系统理论推导了控制敏感因子指标。计算各发电机对某振荡模式的参与因子,取参与因子较大的机组的功角和惯性时间常数进行处理得到综合功角。通过矩阵束辨识方法确定某直流线路对综合功角主振模式的控制敏感因子。对得到的多直流系统中不同直流的控制敏感因子排序形成最优控制策略表。控制敏感因子愈高的直流线路愈宜作为附加直流控制的安装点。最后对某多直流HVDC系统进行仿真验证,结果表明了所得最优控制策略表的准确性。
[Abstract]:DC additional control is an effective measure to suppress low frequency oscillation in HVDC systems, but the effect and cost of adding additional control to different DC points in multi-DC HVDC systems are different. In order to achieve the same damping effect, the minimum output of DC modulation (or the maximum damping under unit modulation) is proposed to select the DC point with additional control. Based on the linear system theory, the index of control sensitivity factor is derived. The power angle and inertial time constant of the unit with larger participation factor are calculated by calculating the participating factors of each generator to obtain the comprehensive power angle. A matrix beam identification method is used to determine the control sensitivity factor of a DC line to the main mode of integrated power angle. The optimal control strategy table is formed by ranking the different DC control sensitive factors in the multi-DC system. The higher the control sensitivity factor, the better the installation point of the additional DC control. Finally, the simulation results of a multi-DC HVDC system show the accuracy of the optimal control strategy table.
【作者单位】：四川大学电气信息学院;
【基金】：国家自然科学基金重点资助项目(51037003) 国家高技术研究发展计划(863计划)资助项目(2011AA05A119) 国家电网公司科技重大专项(SGCC-MPLG027-2012)~~
【分类号】：TM721.1

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