| 引用本文: | 刘沛津,石梦涛,何林,贺宁,陈武.中低压直流配电网母线电压稳定控制[J].电力自动化设备,2022,42(2): |
| LIU Peijin,SHI Mengtao,HE Lin,HE Ning,CHEN Wu.Stability control of bus voltage for medium-and low-voltage DC distribution network[J].Electric Power Automation Equipment,2022,42(2): |
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| 摘要: |
| 为了抑制直流配电网内间歇性电源输出功率以及负荷扰动对直流母线电压的冲击，设计一种基于降阶扩张状态观测器的线性自抗扰控制方法，实现直流母线电压的稳定控制。在不增加负荷电流传感器的情况下，实现直流电压控制单元对扰动的快速响应与跟踪，有效提高控制系统的抗扰动性和稳定性。在理论和仿真分析的基础上，将所提控制算法嵌入自主开发的AC/DC变换器的数字信号处理模块，设计模拟直流母线电压负荷大扰动工况实验，并进行了对比分析。结果表明所设计的控制器对于直流母线电压控制的鲁棒性、稳定性及实时性显著优于传统双PI控制器。 |
| 关键词: 直流配电网 AC/DC变换器 直流负荷扰动 扩张状态观测器 母线电压稳定控制 |
| DOI：10.16081/j.epae.202112001 |
| 分类号:TM461 |
| 基金项目:国家自然科学基金资助项目(61903291)；陕西省教育厅产业化项目(18JC018) |
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| Stability control of bus voltage for medium-and low-voltage DC distribution network |
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LIU Peijin1, SHI Mengtao1, HE Lin2, HE Ning1, CHEN Wu3
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1.School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;2.School of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China;3.Untapped Reserves Development Company, Panjin 124000, China
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| Abstract: |
| In order to suppress the impacts of intermittent power output and load disturbance on DC bus voltage in DC distribution network, a linear active disturbance rejection control method based on reduced-order extended state observer is proposed to realize stable control of DC bus voltage. In the case of not increasing load current sensor, the DC voltage control unit can quickly respond and track the disturbance, and effectively improve the anti-disturbance and stability of the control system. On the basis of theoretical and simulation analysis, the proposed control algorithm is embedded into the self-developed digital signal processing module of AC/DC converter, and the experiment is designed to simulate DC bus voltage load under the large-disturbance condition, and the comparative analysis is conducted. The results show that the designed controller has better robustness, stability and real-time performance for DC bus voltage control than the traditional dual-PI controller. |
| Key words: DC distribution network AC/DC converter DC load disturbance extended state observer stability control of bus voltage |
