| 引用本文: | 孟 飞,曲 骅,郭添亨,等.直流微电网的惯性与阻尼自适应协调控制[J].电力系统保护与控制,2022,50(20):149-157.[点击复制] |
| MENG Fei, QU Hua, GUO Tianheng, DU Yankun, FENG Yunliang,MENG Fei, QU Hua, GUO Tianheng, DU Yankun, FENG Yunliang,MENG Fei, QU Hua, GUO Tianheng, DU Yankun, FENG Yunliang,et al.Adaptive coordinated control of inertia and damping for DC microgrid[J].Power System Protection and Control,2022,50(20):149-157[点击复制] |
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| 直流微电网的惯性与阻尼自适应协调控制 |
| 孟飞,曲骅,郭添亨,杜彦锟,冯允良 |
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| (中山供电局项目与供应链服务中心，广东 中山 528401) |
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| 摘要: |
| 随着分布式发电单元的不断接入，直流微电网逐渐呈现出低惯性和弱阻尼特性，直流母线电压会随着功率扰动而发生突变或失稳。采用变下垂控制为系统提供虚拟惯性。通过根轨迹分析可知变下垂控制为系统提供虚拟惯性的同时会削弱系统的阻尼，使直流微电网出现持续振荡的风险。在此基础上，设计一种虚拟惯性与阻尼的自适应协调控制策略。其控制函数以电压为自变量，在大扰动和小扰动情况下，能够为系统提供虚拟惯性和有源阻尼，从而改善直流微电网的低惯性和弱阻尼特性，保证系统的安全稳定运行。通过在Matlab/Simulink仿真平台上搭建直流微电网模型，验证了所提协调控制策略的有效性。 |
| 关键词: 直流微电网 变下垂控制 虚拟惯性 有源阻尼 自适应协调控制 |
| DOI：DOI: 10.19783/j.cnki.pspc.211734 |
| 投稿时间：2021-12-19修订日期：2022-02-12 |
| 基金项目:国家自然科学基金面上项目资助(51977001)；广东电网有限责任公司基建技术创新课题(032000WS22180001) |
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| Adaptive coordinated control of inertia and damping for DC microgrid |
| MENG Fei, QU Hua, GUO Tianheng, DU Yankun, FENG Yunliang,MENG Fei, QU Hua, GUO Tianheng, DU Yankun, FENG Yunliang,MENG Fei, QU Hua, GUO Tianheng, DU Yankun, FENG Yunliang,MENG Fei, QU Hua, GUO Tianheng, DU Yankun, FENG Yunliang,MENG Fei, QU Hua, GUO Tianheng, DU Yankun, FENG Yunliang |
| (Project and Supply Chain Service Center of Zhongshan Power Supply Bureau, Zhongshan 528401, China) |
| Abstract: |
| With the continuous access of distributed generation units, DC microgrid gradually presents the characteristics of low inertia and weak damping, and the DC bus voltage will suddenly change or become unstable with power disturbance. In this paper, variable droop control is used to provide virtual inertia for the system. Through root locus analysis, it is proved that when variable droop control provides virtual inertia for the system, the damping of the system will be weakened, resulting in the risk of continuous oscillation of DC microgrid. On this basis, this paper designs an adaptive coordinated control strategy of virtual inertia and damping. Its control function takes voltage as the independent variable to provide virtual inertia and active damping for the system under large disturbance and small disturbance, so as to improve the low inertia and weak damping characteristics of DC microgrid and ensure the safe and stable operation of the system. The effectiveness of the proposed coordinated control strategy is verified by building a DC microgrid model on the Matlab/Simulink simulation platform.
This work is supported by the General Program of National Natural Science Foundation of China (No. 51977001). |
| Key words: DC microgrid variable droop control virtual inertia active damping adaptive coordinated control |
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