| 引用本文: | 张丕豪,束洪春,孙士云,等.采用自抗扰控制的双馈风机定转子侧协同低电压穿越策略研究[J].电力系统保护与控制,2025,53(18):12-25.[点击复制] |
| ZHANG Pihao,SHU Hongchun,SUN Shiyun,et al.Research on coordinated low-voltage ride through strategy for DFIGs stator and rotor sides based on active disturbance rejection control[J].Power System Protection and Control,2025,53(18):12-25[点击复制] |
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| 摘要: |
| 现有对双馈风电机组低电压穿越(low voltage ride through, LVRT)的研究中，主要的LVRT措施为投入撬棒保护电路，但该措施较为单一和被动，并且风机还需要吸收一定的无功，因此风机系统难以取得良好的LVRT性能。针对这一问题，提出一种含线性自抗扰控制(linear active disturbance rejection control, LADRC)的定、转子侧协同LVRT策略。定子侧采用串联动态阻抗以抑制转子电流升高；网侧变流器采用LADRC提高直流侧母线电压的抗扰能力，并为转子侧变流器附加控制策略创造良好的工作条件。针对不同程度的电压跌落，转子侧变流器分别采用无功补偿和磁链主动衰减的控制策略以优化LVRT期间的无功输出能力。在考虑相位跳变的基础上，分析了采用LADRC以及定、转子侧协同LVRT策略下的双馈风机短路特性，并对短路电流进行了解析。最后，通过仿真验证了该协同LVRT策略的有效性以及短路电流解析式的正确性。 |
| 关键词: 双馈风力发电机 定子串联动态阻抗 线性自抗扰控制 无功补偿 磁链主动衰减控制 低电压穿越 |
| DOI：10.19783/j.cnki.pspc.241309 |
| 投稿时间：2024-09-26修订日期：2024-12-10 |
| 基金项目:国家自然科学基金项目资助(52037003)；云南省重大专项资助(202002AF080001) |
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| Research on coordinated low-voltage ride through strategy for DFIGs stator and rotor sides based on active disturbance rejection control |
| ZHANG Pihao,SHU Hongchun,SUN Shiyun,XU Tao,CHEN Youwei,JIANG Chaoshun,LIU Weisheng |
| (Kunming University of Science and Technology, Kunming 650500, China) |
| Abstract: |
| In existing research on low-voltage ride through (LVRT) of double fed induction generators (DFIGs), the main LVRT measure is to engage the crowbar protection circuit. However, this approach is relatively simple and passive, and the DFIG still needs to absorb a certain amount of reactive power, making it difficult for the system to achieve satisfactory LVRT performance. Aiming at this problem, this paper proposes a coordinated LVRT strategy for the stator and rotor sides with linear active disturbance rejection control (LADRC). The stator side adopts series dynamic impedance to suppress the rise of rotor current. The grid-side converter (GSC) adopts LADRC to improve the disturbance rejection ability of the DC-link voltage, and creates favorable conditions for the auxiliary control of the rotor-side converter (RSC). According to different degrees of voltage drop, the RSC adopts either reactive power compensation or active flux attenuation control strategies to optimize reactive power output during LVRT. Considering phase jumps, the short-circuit characteristics of the DFIG under the LADRC and coordinated LVRT strategy of the stator and rotor sides are analyzed, and the short-circuit current is derived analytically. Finally, the effectiveness of the cooperative LVRT strategy and the correctness of the analytical expression of the short-circuit current are verified by simulations. |
| Key words: double fed induction generator (DFIG) stator series dynamic impedance linear active disturbance rejection control (LADRC) reactive power compensation active flux attenuation control low-voltage ride through (LVRT) |
