直流微电网控制保护策略研究

Research on Strategy of DC Micro-grid Control and Protection

摘要:
目的直流微电网的控制及保护技术，对保证直流微电网的可靠、安全运行具有重要作用。论文旨在解决直流微电网设计中的关键技术问题。
方法从直流母线拓扑结构选择、并离网切换控制策略、保护配置方案三个方面深入开展研究。
结果通过研究，给出了直流母线拓扑结构选择原则、直流微电网的控制策略流程、保护分区及配置，并对直流互感器的选择进行了分析比较。
结论研究成果在国家示范项目中得到了有效性验证，投运以来运行效果良好。

Abstract:
Introduction The control and protection technology of DC microgrid plays an important role in ensuring the reliable and safe operation of DC microgrid. The paper aims to solve the key technologies in the design of DC micro-grid.
Method DC bus topology selection， control strategy， and protection configuration scheme were discussed in the paper.
Result The selection principle of DC bus topology structure， the control strategy process of DC micro-grid， protection zone and configuration are given in the paper. At the same time， the selection of DC transformer is analyzed and compared.
Conclusion The method has been validated in national demonstration projects， and it has performed well since it was put into operation.