| 引用本文: | 王琳,彭克,刘磊,陈羽,焦提操,路茂增.基于综合附加阻尼的直流配电系统稳定性提升方法[J].电力自动化设备,2020,40(4): |
| WANG Lin,PENG Ke,LIU Lei,CHEN Yu,JIAO Ticao,LU Maozeng.Stability improvement method for flexible DC distribution system considering comprehensive additional damping[J].Electric Power Automation Equipment,2020,40(4): |
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| 摘要: |
| 直流配电网的数学建模是分析其稳定性的理论基础，对于分析系统的运行特性具有重大意义。基于典型P-Udc下垂控制的直流配电系统，建立了以动态导纳为基础的下垂控制小扰动稳定性分析模型，分析了直流线路电阻、电感参数变化对系统稳定性的影响。利用奈奎斯特判据对系统输出导纳与输入导纳之比进行分析，以评估系统的整体稳定性。提出了基于复合补偿的综合附加阻尼直流配电系统稳定性提升控制策略，对比分析了补偿前、后系统的稳定性，通过仿真软件搭建直流配电系统模型并进行时域仿真，理论分析和仿真结果均表明所提方法可以增强系统阻尼，抑制系统振荡。 |
| 关键词: 直流配电系统 阻尼补偿 下垂控制 奈奎斯特判据 稳定性分析 |
| DOI：10.16081/j.epae.202003024 |
| 分类号:TM712;TM732 |
| 基金项目:国家自然科学基金资助项目(51807112)；山东省自然科学基金资助项目(ZR2017LEE022) |
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| Stability improvement method for flexible DC distribution system considering comprehensive additional damping |
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WANG Lin, PENG Ke, LIU Lei, CHEN Yu, JIAO Ticao, LU Maozeng
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College of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
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| Abstract: |
| Modeling of DC distribution network is the theoretical basis to analyze stability issues, which is of great significance to the operating characteristic of system. Based on the DC distribution system with typical P-Udc droop control, a small signal stability analysis model in term of dynamic admittance is established to investigate the influences of the DC line resistance and inductance parameters on system stability. Analysis of the ratio of output admittance to input admittance of the system is provided to evaluate the overall system stability based on Nyquist admittance ratio criterion. A comprehensive additional damping stability improvement control strategy based on composite compensation is proposed. The system stability before and after compensation is compared and analyzed. The time domain model of DC power distribution system is built by simulation software. The theoretical analysis and simulative results show that the proposed method can enhance system damping and suppress system oscillation. |
| Key words: DC distribution system damping compensation droop control Nyquist admittance ratio criterion stability analysis |
