| 柔性直流输电系统对多直流馈入系统运行性能的改善作用研究 |
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| 引用本文： | 何英静,李继红,但扬清,朱艳伟,张笑弟,喻哲扬,徐政.柔性直流输电系统对多直流馈入系统运行性能的改善作用研究[J].电力电容器与无功补偿,2020(3):106-111. |
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| 作者姓名： | 何英静 李继红 但扬清 朱艳伟 张笑弟 喻哲扬 徐政 |
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| 作者单位： | 1.国网浙江省有限公司经济技术研究院;2.国网浙江省电力有限公司;3.国网浙江省电力有限公司宁波供电电公司;4.浙江大学电气工程学院 |
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| 摘 要： | MMC-HVDC能够向受端电网提供无功支撑。在多馈入直流系统中,通过MMC-HVDC系统的接入,可以降低常规直流换流站母线之间的多馈入相互作用因子(MIIF),从而增加换流站母线的多馈入有效短路比(MIESCR),提高多馈入直流系统的稳定性。但是MMC-HVDC对受端电网的改善作用与其运行方式和接入地点密切相关。因此,研究MMC-HVDC的合理运行方式和接入地点有重要意义。基于节点阻抗矩阵,得到了MMC-HVDC降低MIIF的计算公式。根据公式,可以得到MMC换流站的最佳运行方式和接入位置。之后在典型系统中验证了计算公式的正确性。最后,通过对浙江电网进行仿真,结果验证了MMC接入对系统暂态稳定性的改善作用。
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| 关 键 词： | 直流多馈入输电系统 多馈入相互作用因子 MMC接入位置 |
Study on Performance Improvement of Multiple DC Infeed Systems by MMC-HVDC System |
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| HE Yingjing,LI Jihong,DAN Yangqing,ZHU Yanwei,ZHANG Xiaodi,YU Zheyang,XU Zheng.Study on Performance Improvement of Multiple DC Infeed Systems by MMC-HVDC System[J].Power Capacitor $ Reactive Power Compensation,2020(3):106-111. |
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| Authors: | HE Yingjing LI Jihong DAN Yangqing ZHU Yanwei ZHANG Xiaodi YU Zheyang XU Zheng |
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| Affiliation: | (Economic and Technological Research Institute of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310008,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China;State Grid Zhejiang Electric Power Co.,Ltd.,Ningbo Power Supply Company,Zhejiang Ningbo 315000,China;College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China) |
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| Abstract: | MMC-HVDC can provide voltage support for the receiving power system.The multiple infeed interaction factor(MIIF)between the converter buses can be reduced in a multiple DC infeed system by the connection of the MMC-HVDC system,thus the multiple infeed effective short circuit ratio(MIESCR)of the converter bus can be increased and the stability of the multiple DC infeed system can be improved.However,this improvement is related to the operation mode and the connection location of the MMC.Therefore,it is important to study the proper operation mode and the connection location of the MMC.The calculation formula which shows the improvement of the MIIF by the MMC-HVDC connection is obtained based on the nodal impedance matrix.From the formula the best operation mode and connection location of the MMC station is given.Then,the correctness of the calculation formula is verified by a typical study case.Finally,the improvement of the transient stability by the MMC connection is verified by the simulation of Zhejiang power grid. |
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| Keywords: | multiple DC infeed system multiple infeed interaction factor MMC station location |
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