| 引用本文: | 王家乾,赵晋斌,曾志伟,毛玲,屈克庆.基于虚拟惯性控制的光伏直流微电网稳定性分析[J].电力自动化设备,2024,44(4):55-61,95 |
| WANG Jiaqian,ZHAO Jinbin,ZENG Zhiwei,MAO Ling,QU Keqing.Stability analysis of photovoltaic DC microgrid based on virtual inertia control[J].Electric Power Automation Equipment,2024,44(4):55-61,95 |
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| 摘要: |
| 在“双碳”目标下，直流微电网呈现低惯性特性，这对系统稳定运行造成不利影响。建立基于母线节点导纳网络的负反馈模型，利用其等效开环函数对系统稳定性进行分析。针对系统稳定裕度不足，提出将虚拟惯性控制引入光伏单元，实现光照变化较大情况下的母线电压平滑输出。理论分析与实验结果表明，所提控制方法在保证光伏利用率的基础上，对母线电压波动的抑制效果明显。 |
| 关键词: 直流微电网 母线节点导纳网络 小干扰稳定性 虚拟惯性控制 |
| DOI：10.16081/j.epae.202308013 |
| 分类号:TM712 |
| 基金项目:国家自然科学基金资助项目(52177184)；上海市 2021年度“科技创新行动计划”科技支撑碳达峰碳中和专项(第一批)(21DZ1207502) |
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| Stability analysis of photovoltaic DC microgrid based on virtual inertia control |
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WANG Jiaqian1, ZHAO Jinbin2, ZENG Zhiwei1, MAO Ling1, QU Keqing1
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1.College of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China;2.Offshore Wind Power Research Institute, Shanghai University of Electric Power, Shanghai 200090, China
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| Abstract: |
| Under the goal of “double carbon”,DC microgrid show low inertia characteristics, which adversely affects the stable operation of the system. A negative feedback model based on the bus node conductor network is established, and its equivalent open-loop function is used to analyze the system stability. Aiming at the lack of system stability margin, it is proposed to introduce the virtual inertia control into the photovoltaic unit, which realizes the smooth output of bus voltage under the situation of large light intensity varia-tion. Theoretical analysis and experimental results show that the proposed control method is effective in suppressing the bus voltage fluctuation on the basis of ensuring the photovoltaic utilization rate. |
| Key words: DC microgrid bus node conduction network small disturbance stability virtual inertia control |
