| 与SG具有一致响应的VSG小信号建模和分析 |
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| 引用本文： | 陈昕,张昌华,黄琦,杨文龙,陈树恒,刘群英.与SG具有一致响应的VSG小信号建模和分析[J].电力自动化设备,2017,37(11). |
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| 作者姓名： | 陈昕 张昌华 黄琦 杨文龙 陈树恒 刘群英 |
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| 作者单位： | 电子科技大学 能源科学与工程学院，四川 成都 611731,电子科技大学 能源科学与工程学院，四川 成都 611731,电子科技大学 能源科学与工程学院，四川 成都 611731,电子科技大学 能源科学与工程学院，四川 成都 611731,电子科技大学 能源科学与工程学院，四川 成都 611731,电子科技大学 能源科学与工程学院，四川 成都 611731 |
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| 基金项目： | 留学回国人员科研启动基金资助项目；中央高校基本科研业务费资助项目(ZYGX2015J104)；国家自然科学基金资助项目(51677020) |
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| 摘 要： | 提出一种新型的虚拟同步发电机(VSG)设计方法,构建虚拟的励磁控制器、调速器和电磁暂态模拟单元。分别对机端电压的d、q分量引入PI控制器,以达到VSG与同步发电机(SG)具有一致响应的目的。建立VSG单机无穷大系统小信号模型,求取并分析系统特征根及其参与因子。分析惯性时间常数、励磁参数对VSG小信号稳定性的影响规律,发现其与SG相关理论吻合。同时分析PI控制参数、线路参数对系统小信号稳定性的影响。利用MATLAB/Simulink仿真验证了上述方法的正确性。
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| 关 键 词： | 虚拟同步发电机 一致性 小信号稳定性 逆变器 特征根 参与因子 |
Small signal modeling for virtual synchronous generator consistent with synchronous generator and analysis |
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| CHEN Xin,ZHANG Changhu,HUANG Qi,YANG Wenlong,CHEN Shuheng and LIU Qunying.Small signal modeling for virtual synchronous generator consistent with synchronous generator and analysis[J].Electric Power Automation Equipment,2017,37(11). |
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| Authors: | CHEN Xin ZHANG Changhu HUANG Qi YANG Wenlong CHEN Shuheng and LIU Qunying |
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| Affiliation: | School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China,School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China,School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China,School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China,School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China and School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China |
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| Abstract: | An improved VSG(Virtual Synchronous Generator) model is presented through modeling of virtual exciter, governor, and electromagnetic transient simulation unit. A PI internal-loop controller is designed for inverter terminal voltage d-and q-axis elements, which ensures that the proposed improved VSG can provide an equivalent dynamic response as SG(Synchronous Generator). A small-signal model of a single VSG machine infinite-bus system is developed, and then the system eigenvalues and participation factors are calculated. Effects of the inertia time constants and the excitation system parameters on VSG small-signal stability are analyzed. The analyzed conclusion coincides with the correlative theories of SG. Influences of the PI controller parameters and the line parameters on VSG small-signal stability are also analyzed. Simulative results based on MATLAB/Simulink verify the effectiveness of the proposed method. |
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| Keywords: | virtual synchronous generator consistency small-signal stability electric inverters eigenvalue participation factor |
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