| 引用本文: | 李辰佳,李 琰,范译文,等.适用于光伏接入中压直流配电网的改进型LADRC恒压控制策略[J].电力系统保护与控制,2025,53(03):37-46.[点击复制] |
| LI Chenjia,LI Yan,FAN Yiwen,et al.Improved LADRC constant voltage control strategy for photovoltaic integration into MVDC distribution networks[J].Power System Protection and Control,2025,53(03):37-46[点击复制] |
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| 摘要: |
| 在外界扰动出现时，含光伏的中压直流配电系统的母线电压会发生波动，给电力系统的稳定运行带来挑战。针对传统光伏恒压控制策略抗扰性不足的问题，提出了基于改进型线性自抗扰控制(linear active disturbance rejection control, LADRC)的光伏恒压控制策略。对于两级集成式的DC/DC变换器，采用基于微分反馈的线性扩张状态观测器(linear extended state observer, LESO)，设计改进型LADRC结构，并详细分析了控制器的参数整定、抗扰性和稳定性。在仿真平台中将采用PI控制、传统LADRC和改进型LADRC的光伏恒压控制效果进行对比。结果表明，基于改进型LADRC的光伏恒压控制策略具有优秀的抗干扰能力，能够以更小的超调量和更快的响应速度使直流母线电压恢复稳定。 |
| 关键词: 光伏发电系统 中压直流系统 线性自抗扰控制 抗干扰能力 |
| DOI：10.19783/j.cnki.pspc.240461 |
| 投稿时间：2024-04-16修订日期：2024-07-23 |
| 基金项目:国家自然科学基金项目资助(U23B20120) |
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| Improved LADRC constant voltage control strategy for photovoltaic integration into MVDC distribution networks |
| LI Chenjia1,LI Yan1,FAN Yiwen1,LIU Chao1,WANG Cong2,HE Yang1 |
| (1. China Electric Power Research Institute, Beijing 100192, China; 2. State Grid
Beijing Electric Power Company, Beijing 100031, China) |
| Abstract: |
| When external disturbances occur, the bus voltage of a MVDC distribution system with PV integration will fluctuate, posing challenges to the stable operation of the power system. In this paper, a PV constant voltage control strategy based on improved linear active disturbance rejection control (LADRC) is proposed to address the insufficient disturbance rejection of traditional PV constant voltage control strategies. For the two-stage integrated DC/DC converter, a linear extended state observer (LESO) based on differential feedback is used to design the improved LADRC structure, and the parameter tuning, disturbance rejection, and stability of the controller are analyzed in detail. The effects of PV constant voltage control using PI control, traditional LADRC, and improved LADRC are compared on a simulation platform. The results show that the PV constant voltage control strategy based on the improved LADRC has excellent anti-interference capability and can restore the DC bus voltage to stability with smaller overshoot and faster response speed. |
| Key words: photovoltaic power generation system MVDC system linear active disturbance rejection control anti-interference capability |
