| 引用本文: | 吴济东,汪可友,黄鑫,等.孤立直流微电网多DC-DC变换器分布式协调控制策略[J].电力系统保护与控制,2020,48(11):76-83.[点击复制] |
| WU Jidong,WANG Keyou,HUANG Xin,et al.Distributed coordinated control scheme of parallel DC-DC converters in isolated DC microgrids[J].Power System Protection and Control,2020,48(11):76-83[点击复制] |
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| 摘要: |
| 在孤立直流微电网中，为保证电网运行的稳定与设备运行的协调，多DC-DC变换器需要在保证直流母线电压稳定的同时，维持各变换器之间的功率能够按照设置的比例进行分配。研究表明，基于Lyapunov第二定律的新型协调控制策略，可以确保直流母线电压的稳定。研究各变换器的功率，证明了各变换器功率能够按照用户的设定实现按比例分配。分析表明，该控制策略作用下，控制策略的收敛速率按照指数的收敛速率进行收敛，响应速率较为迅速。其性能通过simulink离线仿真和StarSim HIL Pro实时仿真进行了验证，仿真结果与理论分析相吻合。 |
| 关键词: 孤立直流微电网 电压稳定 协调控制 Lyapunov第二定律 |
| DOI：10.19783/j.cnki.pspc.190771 |
| 投稿时间：2019-07-03修订日期：2019-10-25 |
| 基金项目:国家自然科学基金项目资助(51877133); 国家电网公司科技项目资助(52094017000Z)“基于电力弹簧的微电网新型运行模式原理、设计与控制技术研究” |
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| Distributed coordinated control scheme of parallel DC-DC converters in isolated DC microgrids |
| WU Jidong,WANG Keyou,HUANG Xin,QI Chen,LI Guojie,ZHANG Yin |
| (Key Laboratory of Control of Power Transmission and Transformation Shanghai Jiao Tong University, Ministry of Education, Shanghai 200240, China;Electric Power Research Institute of State Grid Shanghai Municipal Electric Power Company, Shanghai 200437, China) |
| Abstract: |
| In isolated microgrids, to ensure the stability of power grid operation and the coordination of equipment operation, parallel DC converters are required to both ensure the DC bus voltage stability and maintain the power sharing ratio of each converter at the set proportion. Research indicates that a novel coordinating control scheme based on the Lyapunov second theorem can ensure the stability of the DC bus voltage. By analyzing the power of each converter connecting to the DC bus, the power sharing ratio can be set proportionally according to the user’s command. Analysis shows that under the control scheme, the convergent speed is exponential, which means that the convergence is relatively fast. The research is verified by a Simulink offline simulation and StarSim HIL Pro real-time simulation. The simulation results correspond to the theoretical analysis. This work is supported by National Natural Science Foundation of China (No. 51877133) and Science and Technology Project of State Grid Corporation of China (No. 52094017000Z) “Research on Theory, Design, and Control Technology of Microgrid Novel Operation Mode based on Electric Power Spring”. |
| Key words: isolated DC microgrids voltage stability coordinating control scheme Lyapunov second theorem |
