提升电能质量的构网逆变器精细抗干扰控制  

Elegant Anti-disturbance Control of Grid- forming Inverters for Power Quality Enhancement

作　　者：周中浩 魏春 陈强[1] 尹天琦 ZHOU Zhonghao;WEI Chun;CHEN Qiang;YIN Tianqi(College of Information Engineering,Zhejiang University of Technology,Hangzhou 310023,China)

机构地区：[1]浙江工业大学信息工程学院,杭州310023

出　　处：《电力电容器与无功补偿》2025年第2期82-89,105,共9页Power Capacitor & Reactive Power Compensation

基　　金：国家自然科学基金(62222315)。

摘　　要：大规模新能源发电系统的并网导致电力系统并网点出现电压波动和谐波等问题。本文提出了一种构网逆变器精细抗干扰控制策略,可以同时改善电力系统并网点的电压波动和电流谐波问题。首先,设计了一种补偿函数观测器,消除由于非周期性干扰和内部参数不确定性带来的影响,在提升系统动态响应的同时,增强系统的抗扰性和鲁棒性,减小并网点的电压波动;其次,设计了重复控制器,通过将零相位滤波器置于重复控制器内环之外,防止陷波频率的偏移,从而提升谐波抑制能力;最后,在RT1000实时仿真器中建立IEEE三机九节点系统,验证所提精细抗干扰控制策略的性能。The integration of large-scale renewable energy generation systems into the power grid has led to such issues as voltage fluctuation and harmonics at the integration point of the power system.In this paper,a elegant anti-disturbance control strategy for grid-forming inverters is proposed for solving the problem of voltage fluctuations and current harmonics in power system.Firstly,a compensating function observer is designed to eliminate the effects due to aperiodic disturbances and internal parameter uncertainties and,at the time of improving the dynamic response of system,enhance the system immunity and robustness as well as reduce voltage fluctuation of the integration point.Then,a repetitive controller is designed to prevent shift of the notch frequency by placing a zero-phase filter outside the inner loop of the repetitive controller,thereby enhancing harmonic suppression capability.Finally,an IEEE three-machine nine-node system is set up in the RT1000 real-time simulator to verify the performance of the proposed elegant anti-disturbance control strategy.

关 键 词：扰动观测器 重复控制 电压波动 谐波抑制 实时仿真 

分 类 号：TM464[电气工程—电器]