| 引用本文: | 许可,鲜杏,程杰,等.基于模最优与对称最优的轻型直流PI参数整定[J].电力系统保护与控制,2016,44(2):122-127. |
| XU Ke,XIAN Xing,CHENG Jie,et al.Tuning method of PI controller of VSC-HVDC based on modulus and symmetrical optimum[J].Power System Protection and Control,2016,44(2):122-127 |
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| 摘要: |
| 轻型直流输电(VSC-HVDC)控制系统的PI参数会对其运行性能产生较大影响，因此需要选择合适的控制参数以适应多种运行条件。针对VSC-HVDC普遍采用的直接电流控制，提出了一种模最优与对称最优相结合的参数整定方法。利用具有快速响应和简便性的模最优法，整定内环控制PI参数，使得控制单元具有快速的电流响应和鲁棒性。利用可以保证最大相角裕度的对称最优法，整定外环控制PI参数，达到较好的稳定性和抗干扰性能。最后，基于PSCAD/ EMTDC建立相应的数学模型，仿真结果证明PI调节器可以使实际值迅速跟踪参考值的变化，验证了方法的正确性和有效性。 |
| 关键词: 电压源换流器 直接电流控制 PI参数 模最优 对称最优 |
| DOI：10.7667/j.issn.1674-3415.2016.02.017 |
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| Tuning method of PI controller of VSC-HVDC based on modulus and symmetrical optimum |
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XU Ke, XIAN Xing, CHENG Jie, TAO Fen
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Hubei Electric Power Survey & Design Institute, Wuhan 430074, China
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| Abstract: |
| PI parameters of the control system in VSC-HVDC will have a great impact on its operating performance, so it is necessary to select the appropriate control parameters to meet the demand of a variety of operating conditions. Direct current control widely used by VSC-HVDC is adopted. A parameter tuning method combining of modulus optimum and symmetrical optimum is proposed. The inner loop is tuned according to modulus optimum with a fast response and simplicity, making the control unit have a fast current response and robustness. The outer loop is tuned according to symmetrical optimum which can ensure the maximum phase margin, achieving better stability and disturbance rejection. Finally, mathematical models based on PSCAD/EMTDC are built. Simulation results show that the PI controller can quickly track changes of the reference value, demonstrating the correctness and effectiveness of the method. |
| Key words: VSC direct current control PI parameter modulus optimum symmetrical optimum |
