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Dynamic phasor-based hybrid simulation for multi-inverter grid-connected system

2023-06-14

【论文推荐】智能电网研究院徐云飞等：基于动态相量的多逆变器并网系统混合仿真

摘要

为了实现基于多个逆变器的并网发电系统的高效暂态仿真，本文提出了一种集成电磁暂态和动态相量模型的混合仿真方法。在阐述动态相量概念和特性的基础上，首先建立了用动态相量描述的单相和三相逆变器的模型。考虑到动态相量与瞬时值之间的数值兼容性问题，设计了动态相量和瞬时值之间接口方案，并详细比较了各种变换方法的效率和精度差异。最后，利用MATLAB/Simulink建立了多逆变器并网系统的混合仿真平台，并与全电磁暂态仿真进行了比较，验证了混合仿真的有效性和准确性。

Dynamic phasor-based hybrid simulation for multi-inverter grid-connected system

基于动态相量的多逆变器并网系统混合仿真

Peng Yang¹, Qian Li¹, Junyu Zhao², Juanjuan Lu³, Yunfei Xu³

1.State Grid Hebei Electric Power Co. Ltd., Shijiazhuang 050021, P. R. China

2.State Grid Baoding Power Supply Company, Baoding 071051, P. R. China

3.State Grid Smart Grid Research Institute Co. Ltd., Beijing 102200, P. R. China

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Dynamic Phasor-Based Hybrid Simulation for Multi-Inverter grid-connected

Abstract

To realize the efficient transient simulation of a grid-connected power generation system based on multiple inverters, this paper proposes a hybrid simulation method integrating the models of electromagnetic transient and dynamic phasors. Based on a demonstration of the concepts and properties of dynamic phasors, the models of single-phase and three-phase inverters described by dynamic phasors are established first. Considering the numerical compatibility problem between dynamic phasors and instantaneous values, an interface scheme between dynamic phasors and instantaneous values is designed, and the efficiency and precision differences of various transformation methods are compared in detail. Finally, by utilizing MATLAB/Simulink, a hybrid simulation platform of a multi-inverter grid-connected system is built, and the efficiency and accuracy of the hybrid simulation are validated via comparison with the full electromagnetic transient simulation.

Keywords

Multi-inverter grid-connected system; Electromagnetic transient; Dynamic phasor; Hybrid simulation

Fig. 1 Circuit and its switching mode of single-phase grid-connected inverter

Fig. 2 Circuit of three-phase grid-connected inverter

Fig. 3 Interface mechanism in hybrid simulation

Fig. 4 Subsystem division of multiple inverters gridconnected system in hybrid simulation

Fig. 5 Main process of the hybrid simulation algorithm

Fig. 6 AC-side voltage of single-phase inverter connected to strong grid

Fig. 7 AC-side voltage of single-phase inverter connected to weak grid

Fig. 8 AC-side voltage and current of three-phase inverter

Fig. 9 A-phase voltage and current of three-phase inverter

本文引文信息

Yang P, Li Q, Zhao JY, et al (2023) Dynamic phasor-based hybrid simulation for multi-inverter grid-connected system. Global Energy Interconnection, 6(2): 197-204

杨鹏，李倩，赵军愉等 (2023) 基于动态相量的多逆变器并网系统混合仿真. 全球能源互联网（英文）, 6(2): 197-204

Biographies

Peng Yang

Peng Yang received the B.S. degree in power system and automation from Shanghai Jiaotong University, Shanghai, China, in 1998. He is currently working in State Grid Hebei Electric Power Co., Ltd. His research interests mainly include power grid planning and power electronics technology.

Qian Li

Qian Li received the B.S. degree in power system and automation from Shijiazhuang Railway University, Shijiazhuang, China, in 2011, and a M.S. degree in power electronics and power transmission from Shijiazhuang Railway University Shijiazhuang, China, in 2015. She is currently working at State Grid Hebei Electric Power Co., Ltd. Her research interests mainly include flexible AC/DC power grid and power electronics technology.

Junyu Zhao

Junyu Zhao received the B.S. and M.S. degrees from North China Electric Power University, Beijing, China, in 2012 and 2017. He is currently working at State Grid Baoding Power Supply Company. His research interests mainly include electrical engineering and automation, electronics and communication engineering.

Juanjuan Lu

Juanjuan Lu received the B.S. and M.S. degrees from North China Electric Power University, Beijing, China, in 2017 and 2020. She is currently working at State Grid Smart Grid Research Institute Co., Ltd. Her research interests mainly include IGBT series technology and power electronics.

Yunfei Xu

Yunfei Xu received the B.S. degree from Chongqing University, Chongqing, China, in 2013, and a Ph.D. degree from North China Electric Power University, Beijing, China, in 2017. He is currently working at State Grid Smart Grid Research Institute Co., Ltd. His research interests mainly include low- frequency transmission, flexible substation, and IGBT series technology.

编辑：刘通明

审核：王伟

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