欧洲柔性直流电网的规划及其仿真研究

Planning and simulation research of European VSC-HVDC grid

建立全球能源互联网是实现新能源大规模开发、高比例接入电网的重要发展方向。文中对柔性直流电网跨接在欧洲交流主网上的可行性及影响进行了深入分析。首先,梳理了欧洲资源负荷的分布情况,设计了直流换流站的位置、容量和直流网架的结构;然后,基于机电暂态仿真软件PSS/E,在欧洲交流网架上建立了51端柔性直流电网;最后,针对柔性直流电网接入后交流电网的频率、电压稳定性,柔性直流电网对于交流网侧输入功率不稳定情况下的响应策略以及紧急功率支援能力等进行了仿真研究。仿真结果表明,规划的柔性直流电网能够提供功率支撑并降低换流站注入功率波动的影响,提高欧洲电网的稳定性。

The establishment of a global energy Internet is an important development direction for large-scale development of new energy and a high proportion of access to the grid.The feasibility and influence of the VSC-HVDC grid across the European AC system is analyzed in this paper.Firstly,the distribution of resource loads in Europe is sorted out,the location and the capacity of the DC converter stations is designed,and DC grid structure is built.Then,based on the electromechanical transient simulation software PSS/E,51 terminals VSC-HVDC grid is built on the European AC grid.Finally,the stability of the AC grid and the response characteristics of DC grid under multiple scenarios are studied.The simulation results show that the planned VSC-HVDC grid can provide power support,reduce the impact of power fluctuations injected by the converter station,and improve the stability of the European power grid.