| 引用本文: | 周一辰,畅布赫,李永刚.基于dq统一频率变换的电力系统宽频带仿真与分析[J].电力自动化设备,2021,41(4): |
| ZHOU Yichen,CHANG Buhe,LI Yonggang.Power system wideband simulation and analysis based on dq unified frequency transformation[J].Electric Power Automation Equipment,2021,41(4): |
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| 摘要: |
| 随着高比例新能源电力系统的电力电子化特征凸显，电力系统宽频带仿真面临挑战。首先介绍了基于dq统一频率变换建模的基本理论，分析了基于dq统一频率变换建模与准静态相量建模的异同点。而后基于该基本理论，建立了同步发电机、双馈风力发电机和电力网络的多尺度仿真模型。进一步针对系统仿真和分析中的电网高维问题，提出了系统网络简化方法，降低模型阶数。最后采用IEEE 3机9节点算例，验证了所提仿真模型的准确性。仿真结果表明所提建模方法能够准确计算振荡模式下的宽频带仿真模型，弥补了电磁暂态模型无法计算小干扰稳定模式的不足，同时具备快速宽频带仿真能力，其准确性与电磁暂态模型一致，适用于大规模电力系统仿真与分析。 |
| 关键词: dq变换 统一频率 宽频带仿真模型 小干扰稳定分析 电力电子化 电力系统 |
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| 基金项目:河北省自然科学基金资助项目(E2020502067)；中央高校基本科研业务费专项资金资助项目(2019MS079) |
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| Power system wideband simulation and analysis based on dq unified frequency transformation |
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ZHOU Yichen, CHANG Buhe, LI Yonggang
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School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China
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| Abstract: |
| With the prominent characteristics of power electronization in high-proportion new energy power system, the power system wideband simulation faces challenges. Firstly, the basic theory of dq unified frequency transformation modeling is introduced, and the similarities and differences between dq unified frequency transform modeling and quasi-static phase modeling are analyzed. Then, based on this basic theory, the multi-scale simulation model of synchronous generator, doubly-fed wind turbine generator and power network is established. Furthermore, aiming at the high-dimensional problem of power grid in system simulation and analysis, a method of system network simplification is proposed to reduce the model order. Finally, IEEE 3-machine 9-bus test system is adopted to verify the accuracy of the proposed simulation model. The simulative results show that the proposed modeling method can correctly calculate the wideband simulation model under oscillation mode, which compensates the shortage that the electro-magnetic transient model cannot calculate the small signal stability mode. Meanwhile, the proposed modeling method has the abilities of fast wideband simulation and high accuracy consistent with the electro-magnetic transient model, which is suitable for large-scale power simulation and analysis. |
| Key words: dq transformation unified frequency wideband simulation model small-signal stability analysis power electronization electric power systems |
