| 引用本文: | 肖晃庆,何宏亮,杨苹,张利东,刘腾.具备跟网-构网二象性的并网VSC自适应混合控制及其暂态稳定性分析[J].电力自动化设备,2025,45(6):108-115. |
| XIAO Huangqing,HE Hongliang,YANG Ping,ZHANG Lidong,LIU Teng.Adaptive hybrid control of grid-connected VSC with grid-following and grid-forming duality and its transient stability analysis[J].Electric Power Automation Equipment,2025,45(6):108-115. |
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| 摘要: |
| 电压源型换流器(VSC)的跟网型控制和构网型控制适用范围具有一定的局限性，对此提出一种具备跟网-构网二象性的并网VSC自适应混合控制。该控制将跟网型控制与构网型控制柔性结合在一起，并在同步控制环和电压控制环中引入自适应系数，可以通过改变自适应系数的大小来调整跟网型控制和构网型控制在控制环节中的比重，从而使换流器能够适应不同的运行工况。研究结果表明，交流故障下通过改变同步控制环的自适应系数，增大同步控制环中锁相环所占比重，能够减小换流器输出的有功功率参考值，增大惯性与阻尼，从而提升系统的暂态稳定性；而改变电压外环的自适应系数，增大电压外环中跟网型控制所占比重，能够提高换流器并网点电压，从而提升系统的暂态稳定性；采用所提控制策略后，换流器在不同短路比下的有功功率阶跃工况和不同程度的电网电压暂降工况下都能保持稳定运行。在PSCAD/EMTDC中搭建了VSC并网仿真模型，仿真结果验证了自适应混合控制策略的可行性和有效性。 |
| 关键词: 电压源型换流器 混合控制 暂态稳定性 构网型控制 跟网型控制 |
| DOI：10.16081/j.epae.202501002 |
| 分类号:TM46 |
| 基金项目:广东省基础与应用基础研究基金资助项目(2023A1515111125)；中国南方电网有限责任公司研究项目(ZBKJXM20232278) |
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| Adaptive hybrid control of grid-connected VSC with grid-following and grid-forming duality and its transient stability analysis |
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XIAO Huangqing1, HE Hongliang1, YANG Ping1, ZHANG Lidong2, LIU Teng2
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1.School of Electric Power, South China University of Technology, Guangzhou 510641, China;2.Electric Power Research Institute of China Southern Power Grid, Guangzhou 510663, China
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| Abstract: |
| The application scope of grid-following control and grid-forming control for voltage source conver-ters has certain limitations, so an adaptive hybrid control of grid-connected voltage source converter with grid-following and grid-forming duality is proposed. This control combines the grid-following control and grid-forming control flexibly, and introduces adaptive coefficients into the synchronous control loop and vol-tage control loop. The proportion of grid-following control and grid-forming control in the control loop can be adjusted by changing the value of the adaptive coefficient, so that the converter can adapt to different operating conditions. The research results show that by changing the adaptive coefficient of the synchronous control loop and increasing the proportion of the phase-locked loop in the synchronization loop under alternating current faults, the active power reference value of the converter can be reduced, the inertia and damping can be increased, and the transient stability of the system can be improved. Changing the adaptive coefficient of the voltage outer loop, increasing the proportion of grid-following control in the voltage outer loop can increase the voltage at the gird connection point, thereby enhancing the stability of the system. After adopting the proposed control strategy, the converter can maintain stable operation under active power step conditions with different short-circuit ratios and different degrees of grid voltage sag conditions. A voltage-source converter grid-connected simulation model is built in PSCAD/EMTDC, and the results verify the feasibility and effectiveness of the adaptive hybrid control strategy. |
| Key words: voltage source converters hybrid control transient stability grid-forming control grid-following control |
