| 引用本文: | 魏 亮,王渝红,李兴源,黎东祥,刘霄涵,汤 华.高压直流输电送端孤岛运行附加频率控制器设计[J].电力自动化设备,2016,36(1): |
| WEI Liang,WANG Yuhong,LI Xingyuan,LI Dongxiang,LIU Xiaohan,TANG Hua.Design of additional frequency controller for islanded sending-end operation of HVDC system[J].Electric Power Automation Equipment,2016,36(1): |
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| 摘要: |
| 高压直流输电系统在孤岛运行方式下，由于缺少负荷的频率调节效应，交、直流系统的扰动极易造成送端系统频率的不稳定。采用TLS-ESPRIT算法辨识出某实际电网系统的传递函数，并根据根轨迹校正原则设计了一种直流系统附加频率控制器，利用直流输电系统功率的快速可控性，来稳定送端系统频率。同时，设计了传统比例积分控制器与所提控制器进行比较。在PSCAD／EMTDC中仿真结果表明，所设计的频率附加控制器可以有效地提高孤岛系统的频率稳定性。 |
| 关键词: 高压直流输电 孤岛运行 频率稳定 根轨迹校正 附加频率控制 |
| DOI： |
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| 基金项目:国家自然科学基金重点资助项目（51037003）；国家电网公司大电网重大专项资助项目课题（SGCC-MPLG001- 027-2012） |
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| Design of additional frequency controller for islanded sending-end operation of HVDC system |
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WEI Liang,WANG Yuhong,LI Xingyuan,LI Dongxiang,LIU Xiaohan,TANG Hua
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School of Electrical Engineering and Information，Sichuan University，Chengdu 610065，China
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| Abstract: |
| Due to the lack of load frequency modulation effect in the islanding mode of HVDC system operation，the disturbance of AC／DC system may easily lead to system frequency instability. TLS-ESPRIT algorithm is applied to identify the transfer function of a real power system and an additional frequency controller is designed based on the root-locus approach，which utilizes the fast controllability of HVDC system power to stabilize the frequency of its sending-end AC system. A traditional PI controller is also designed and compared with the additional frequency controller by PSCAD／EMTDC simulation，and the results show the designed additional frequency controller enhances the frequency stability of islanded system effectively. |
| Key words: HVDC power transmission islanded operation frequency stability root-locus approach additional frequency control |
