| 新能源同步机并网系统的阻尼特性 |
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| 引用本文： | 武倩羽,黄永章,周莹坤,谷昱君,许国瑞.新能源同步机并网系统的阻尼特性[J].电力系统自动化,2019,43(15):80-86. |
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| 作者姓名： | 武倩羽 黄永章 周莹坤 谷昱君 许国瑞 |
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| 作者单位： | 华北电力大学电气与电子工程学院,北京市,102206;华北电力大学电气与电子工程学院,北京市,102206;华北电力大学电气与电子工程学院,北京市,102206;华北电力大学电气与电子工程学院,北京市,102206;华北电力大学电气与电子工程学院,北京市,102206 |
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| 基金项目： | 国家电网公司总部科技项目“超高占比新能源电网发电控制系统与运行控制策略研究”(XT71-18-041) |
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| 摘 要： | 针对高比例新能源电网存在的低惯性和弱阻尼问题，提出新能源通过驱动同步电动机—同步发电机(MGP)后并网的新方式；阐述了MGP系统小干扰稳定的建模方法，通过小干扰模型研究了MGP的阻尼特性，推导了质量块相同的MGP和单个发电机阻尼比的定量关系；在5 kW实验系统中设计了质量块相同的MGP和单个发电机两种工作模式，对比了相同负载扰动下MGP和单个发电机的频率响应曲线，通过拟合小扰动后的频率响应曲线，分别确定了相同质量块的MGP和单个发电机的阻尼比，对比二者的关系验证了理论推导的结果，证明了相同质量块的MGP相比单个发电机能提供更大的阻尼，为提高高比例新能源电网的稳定性提供了新的解决方案。
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| 关 键 词： | 高比例新能源电网 电力系统稳定性 同步机 阻尼特性 |
| 收稿时间： | 2019/1/8 0:00:00 |
| 修稿时间： | 2019/7/2 0:00:00 |
Damping Characteristics of Synchronous Motor-Generator Pair System for Integration of New Energy |
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| WU Qianyu,HUANG Yongzhang,ZHOU Yingkun,GU Yujun and XU Guorui.Damping Characteristics of Synchronous Motor-Generator Pair System for Integration of New Energy[J].Automation of Electric Power Systems,2019,43(15):80-86. |
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| Authors: | WU Qianyu HUANG Yongzhang ZHOU Yingkun GU Yujun and XU Guorui |
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| Affiliation: | School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China,School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China,School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China,School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China and School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China |
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| Abstract: | Aiming at the problem of low inertia and weak damping existing in power grid with high proportion of new energy, the synchronous motor-generator pair(MGP)system is proposed as a new grid connection method. The modeling method of small signal stability for MGP system is described. On the basis, the damping characteristics of MGP are studied, and quantitative relationship between the damping ratio of MGP and single generator with the same mass block is derived. To verify this quantitative relationship, two working modes of MGP and single generator are designed in 5 kW experimental platform. By fitting the frequency response curves of small disturbance, the damping ratios of MGP and single generator are determined respectively. The comparison results of the relationship between two ratios verify the theoretical deduction, and show that MGP can provide greater damping than single generator with the same mass block. MGP provides a new solution to improve the stability of power grid with high proportion new energy. |
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| Keywords: | power grid with high proportion of new energy power system stability synchronous machine damping characteristics |
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