| 引用本文: | 张 芳,李静远,李传栋.含VSC-HVDC交直流混合系统机电暂态仿真研究[J].电力自动化设备,2016,36(2): |
| ZHANG Fang,LI Jingyuan,LI Chuandong.Electromechanical transient simulation of AC-DC hybrid systems containing VSC-HVDC[J].Electric Power Automation Equipment,2016,36(2): |
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| 摘要: |
| 对含基于电压源型变流器的高压直流输电（VSC-HVDC）交直流混合系统进行机电暂态仿真研究。VSC-HVDC系统的外环功率、电压控制器采用PI控制，以产生内环电流参考值。针对dq同步旋转坐标系下VSC-HVDC交流侧数学模型不能精确解耦的问题，建立基于α β静止坐标系的VSC-HVDC数学模型，引入比例谐振（PR）控制改进了内环电流控制器，可以无静差跟踪内环电流信号。采用以上控制策略实现VSC-HVDC系统的精确解耦控制，并采用双时步仿真方法对VSC-HVDC系统的动态响应进行准确模拟。通过在新英格兰系统上进行仿真实验，验证了所提VSC-HVDC机电暂态控制模型的正确性和双时步混合仿真方法的有效性。 |
| 关键词: VSC-HVDC 高压直流输电 机电暂态 比例谐振控制 双时步混合仿真 交直流混合系统 |
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| Electromechanical transient simulation of AC-DC hybrid systems containing VSC-HVDC |
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ZHANG Fang1, LI Jingyuan1, LI Chuandong2
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1.Key Laboratory of Smart Grid of Ministry of Education，Tianjin University，Tianjin 300072，China;2.Electric Power Research Institute of Fujian Provincial Power Co.，Ltd.，Fuzhou 350007，China
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| Abstract: |
| The electromechanical transient simulation is studied for the AC-DC hybrid system containing VSC-HVDC（Voltage Source Converter based High Voltage Direct Current）. The outer-loop power／voltage controller of VSC-HVDC applies the PI（Proportional Integral） control to generate the inner-loop current reference. Since the AC-side mathematical model of VSC-HVDC on the dq synchronous rotating coordinates cannot be accurately decoupled，its mathematical model on the αβ stationary coordinates is established and the PR（Proportional Resonant） control is introduced to the inner-loop current controller to track the inner-loop current signal with zero steady-error，which realizes the decoupled precise control of VSC-HVDC. The dual time-step method is used to accurately simulate the dynamic response of VSC-HVDC. The correctness of the VSC-HVDC electromechanical transient model and the validity of the proposed dual time-step hybrid simulation method are verified by the simulative results of New England system. |
| Key words: VSC-HVDC HVDC power transmission electromechanical transient proportional resonant control dual time-step hybrid simulation AC-DC hybrid system |
