基于暂态电动势控制的双馈风机鲁棒自同步控制策略  

Robust Self-Synchronization Control Strategy for Doubly-Fed Induction Generator Based on Transient Electromotive Force Control

作　　者：黄达 柯德平[1,2] 杨欢欢 徐光虎[3] 徐箭[1,2] Huang Da;Ke Deping;Yang Huanhuan;Xu Guanghu;Xu Jian(Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network School of Electrical Engineering and Automation Wuhan University,Wuhan 430072 China;School of Electrical Engineering and Automation Wuhan University,Wuhan 430072 China;China Southern Power Grid Power Dispatching and Control Center,Guangzhou 510000 China)

机构地区：[1]武汉大学电气与自动化学院交直流智能配电网湖北省工程中心,武汉430072 [2]武汉大学电气与自动化学院,武汉430072 [3]中国南方电网电力调度控制中心,广州510000

出　　处：《电工技术学报》2025年第4期1046-1062,共17页Transactions of China Electrotechnical Society

基　　金：中国南方电网有限责任公司科技资助项目(0000002022030101XT00031)。

摘　　要：在直接并网电压源型逆变器上广泛研究的自同步控制方法难以直接应用于双馈风机,其主要原因是受控的转子侧逆变器电压与并网的定子暂态电动势是通过转子励磁绕组动态耦合的。因此,该文提出一种基于暂态电动势控制的双馈风机鲁棒自同步控制策略。通过转子侧逆变器电压控制暂态电动势,所提自同步控制策略可有效计及风机机械和励磁动态,避免其对闭环控制系统稳定性的不良影响。此外,针对所提自同步控制中的PI参数,该文进一步提出了鲁棒PI参数设计方法,以应对由于风机参数不确定性带来的闭环系统稳定性问题。仿真结果验证了双馈风机在该文所提自同步控制策略下可以有效地向电网提供支撑。同时,仿真结果表明,具有鲁棒PI参数的自同步控制对风机参数的不确定性具有更强的免疫能力,从而提升了双馈风机自同步闭环控制系统在不确定性参数环境下的稳定性。The grid-side converter(GSC)of the doubly-fed induction generator(DFIG)is directly connected to the grid.Theoretically,virtual synchronous generator(VSG)control can be applied to GSC.However,it is difficult to control the total active output of DFIG through GSC directly,and establishing the“active power-phase angle”relationship between the total active output of DFIG and GSC potential is challenging.The current academic community's implementation of self-synchronization control(VSG control)on the rotor-side converter(RSC)of DFIG ignores the influence of fan dynamics on self-synchronization control.This paper proposes a robust self-synchronization control strategy for DFIG based on transient electromotive force control.It can provide synchronization support to the power grid while ensuring the stability of the closed-loop control system.Furthermore,a robust PI parameter design method for self-synchronization control is proposed.Firstly,by analogy with traditional synchronous generators,a self-synchronization control strategy diagram considering the dynamic characteristics of the DFIG excitation system is proposed to control the RSC output voltage.The proposed self-synchronization control strategy needs to use the transient reactance parameters of DFIG to obtain measured values of transient reactance.Accordingly,An open-loop model of the system is established,and a robust PI parameter design method for self-synchronization control is proposed for the open-loop system,which can effectively solve the stability problem of the closed-loop control system in the presence of uncertainty in the DFIG parameters.Simulation results show that after disconnecting the infinite power switch in a single machine infinite power supply system with load,the system can still operate stably even after losing the infinite power supply.The virtual angular velocity of the self-synchronization control DFIG ultimately stabilizes at 0.997(pu),and the steady-state output active power increment is about 0.0147(pu)Therefore,the droop coeffic

关 键 词：跟网型 构网型 自同步 双馈风机 鲁棒控制 暂态电动势 

分 类 号：TM315[电气工程—电机]