| 微网逆变器的VSG转动惯量和阻尼系数自适应控制 |
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| 引用本文： | 温春雪,陈丹,胡长斌,朴政国,周京华.微网逆变器的VSG转动惯量和阻尼系数自适应控制[J].电力系统自动化,2018,42(17):120-126. |
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| 作者姓名： | 温春雪 陈丹 胡长斌 朴政国 周京华 |
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| 作者单位： | 北京市电力电子与电气传动工程研究中心(北方工业大学) |
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| 基金项目： | 国家自然科学基金资助项目(51777002) |
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| 摘 要： | 近年来随着微网及分布式发电的快速发展,适用于微网并离网运行的虚拟同步发电机(VSG)控制技术被提出。VSG在下垂控制的基础上进一步模拟了同步发电机的转动惯量和阻尼系数。和下垂控制相比,VSG的响应特性得到了进一步的提高,但无法同时保证频率和功率的动态调节性能。针对该问题,对VSG离网工况下的输出频率和并网工况下的输出功率进行了自适应控制。首先,做出不同转动惯量和阻尼系数下的有功环根轨迹,并结合VSG转子机械方程分析转动惯量和阻尼系数对系统的影响,通过建立转动惯量和阻尼系数的自适应函数关系来对VSG实现自适应控制。最后在MATLAB/Simulink中搭建容量为20kVA的VSG自适应控制模型,并搭建了20kVA容量的VSG实验平台,仿真和实验结果验证了所提控制策略的有效性和正确性。
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| 关 键 词： | 微网(微电网) 虚拟同步发电机 自适应控制 转动惯量 阻尼系数 |
| 收稿时间： | 2018/2/2 0:00:00 |
| 修稿时间： | 2018/6/19 0:00:00 |
Self-adaptive Control of Rotational Inertia and Damping Coefficient of VSG for Converters in a Microgrid |
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| WEN Chunxue,CHEN Dan,HU Changbin,PIAO Zhengguo and ZHOU Jinghua.Self-adaptive Control of Rotational Inertia and Damping Coefficient of VSG for Converters in a Microgrid[J].Automation of Electric Power Systems,2018,42(17):120-126. |
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| Authors: | WEN Chunxue CHEN Dan HU Changbin PIAO Zhengguo and ZHOU Jinghua |
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| Affiliation: | Power Electronics and Motor Drive Engineering Research Center of Beijing(North China University of Technology), Beijing 100144, China,Power Electronics and Motor Drive Engineering Research Center of Beijing(North China University of Technology), Beijing 100144, China,Power Electronics and Motor Drive Engineering Research Center of Beijing(North China University of Technology), Beijing 100144, China,Power Electronics and Motor Drive Engineering Research Center of Beijing(North China University of Technology), Beijing 100144, China and Power Electronics and Motor Drive Engineering Research Center of Beijing(North China University of Technology), Beijing 100144, China |
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| Abstract: | In recent years, with the rapid development of microgrid and distributed generation technology, the virtual synchronous generator(VSG)has been proposed which is adaptive to microgrid interface converter for low inertia and small damping. Based on the droop control, VSG further simulates the rotational inertia and damping coefficient of synchronous generator. Compared to the droop control, the response of VSG has been further improved, but the dynamic adjustment performance of frequency and power cannot be guaranteed in the same time. Aiming at this problem, the output frequency of island condition and output power of grid condition are controlled by self-adaptive control. Firstly, the root locus of active power is made under different rotational inertia and damping coefficient, combining with the rotor mechanical equation, the effects of the inertia and damping coefficient on the system are analyzed. Secondly, in order to realize the self-adaptive control of VSG, the self-adaptive equation of the inertia and damping coefficient are established. Finally, self-adaptive control model of VSG whose capacity is 20 kW in MALAB/Simulink and VSG experimental platform are built. The simulation and experimental results verify the efficiency and accuracy of proposed control strategy. |
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| Keywords: | microgrid virtual synchronous generator(VSG) self-adaptive control rotational inertia damping coefficient |
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