| Related citation: | Congshan Li,Jian Guo,Ping He,Yukun Tao,Cunxiang Yang.An LCC-HVDC Adaptive Emergency Power Support Strategy Based on Unbalanced Power On-Line Estimation[J].Journal of Harbin Institute Of Technology(New Series),2020,27(2):87-96.DOI:10.11916/j.issn.1005-9113.18118. |
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| Author Name | Affiliation | | Congshan Li | School of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China | | Jian Guo | School of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China | | Ping He | School of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China | | Yukun Tao | School of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China | | Cunxiang Yang | School of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China |
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| Abstract: |
| HVDC auxiliary power control can significantly improve the transient stability of AC/DC power grid. An HVDC adaptive emergency power support method based on unbalanced power on-line estimation is proposed in this paper. By establishing the extended state equation of the system, the on-line dynamic estimation of unbalanced power of the system was realized. On this basis, power support was realized based on the principle of the ladder increment. The optimal DC was selected by the power support factor, and the emergency power support controller was installed on the DC. This emergency power support method can realize dynamic optimal power support with minimized control cost. The three-infeed HVDC system was built on PSCAD. The simulation results show the effectiveness of the proposed method. |
| Key words: emergency power support unbalanced power extended state observer ladder-increasing principle multi-infeed HVDC system |
| DOI：10.11916/j.issn.1005-9113.18118 |
| Clc Number:TM7 |
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| Descriptions in Chinese: |
| 基于区域内功率不平衡量估计的直流自适应紧急功率支援策略 李从善1，郭健，和萍1，陶玉昆1，杨存祥1，Youyi Wang2 (1.郑州轻工业大学 电气信息工程学院，郑州，450002； 2. 南洋理工大学 电气与电子工程学院，新加坡 639798) 摘要：直流紧急功率支援是在交直流互联系统故障情况下，减少切机或切负荷数量的重要措施，也是实现智能输电的要求。本文通过建立系统扰动下区域内不平衡功率的扩张状态观测器，并对观测器参数进行设置，实现不平衡功率的实时准确估计。对直流紧急功率支援限制因素进行分析，进而对紧急功率支援量进行优化，形成最终功率支援量，然后，基于功率支援阶梯递增原则，最终实现功率支援的目标。对于多落点直流输电系统，基于功率支援因子选取用于功率提升的最优直流。在PSCAD中搭建三馈入直流输电系统，对所提方法进行了仿真分析，结果表明了该方法的有效性。 关键词：紧急功率支援，不平衡功率，扩张装填观测器，阶梯递增原则，多馈入直流输电系统。 |
