交-直流混合微电网中的安全性分析

Security Analysis of AC-DC Hybrid Micro Grid

微电网从交流母线和直流母线的配置角度,可分为交流微电网、直流微电网和交直流混合微电网。交直流混合微电网因其兼备交流微电网与直流微电网的优势,能更好促进电网的消纳,同时可以提高经济效益,是微电网发展的趋势。交直流混合微电网运行方式相比于单一系统的微电网而言更加灵活,可以最大程度地满足就地消纳资源、响应负荷需求等微电网规划设计的个性化需要。但同时其技术要求偏高,电网结构复杂,带来的安全性问题需要着重考量。

Micro grid can be divided into AC micro grid, DC micro grid and AC-DC hybrid micro grid from the point of configuration of AC and DC buses. AC-DC hybrid micro grid has the advantages of both AC micro grid and DC micro grid, which can better promote the elimination of the power grid and improve the economic benefit, which is the trend of the development of micro grid. The operation mode of AC and DC hybrid micro grid is more flexible than the single system micro grid. It can meet the personalized needs of the local micro grid planning and design, such as the local resource consumption and the response to the load demand. But at the same time, its technical requirements are high, the structure will be more complex, and the safety problems need to be considered.